ML18087A110

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Enclosure 15 - APR1400-Z-J-NR-14013-NP, Rev. 2, Response Time Analysis of Safety I&C System
ML18087A110
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Site: 05200046
Issue date: 01/31/2018
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Korea Hydro & Nuclear Power Co, Ltd
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MKD/NW-18-0039L APR1400-Z-J-NR-14013-NP, Rev. 2
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Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP Non-Proprietary Response Time Analysis of Safety I&C System Revision 2 JANUARY 2018 Copyright 2018 Korea Electric Power Corporation &

Korea Hydro & Nuclear Power Co., Ltd All Rights Reserved Non-Proprietary

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP ii Non-Proprietary REVISION HISTORY Revision Date Page Description 0

November 2014 All First Issue 1

February 2017 4

(3.2.2) 98 (8)

A2 (A.3.2)

Editorial Change : Insertion of acronym Incorporation of contemporary revision number of the TeR Editorial Change : Insertion of acronym 2

January 2018 98~103 (7.21) 104 (8)

Addition of Section 7.21 for signal path of ESF-CCS. (RAI 300-8297, Question 07.03-4, Rev.1)

Incorporation of changed title of the TeR (RAI 301-8280, Question 07.01-52, Rev.2)

This document was prepared for the design certification application to the U.S. Nuclear Regulatory Commission and contains technological information that constitutes intellectual property of Korea Hydro & Nuclear Power Co., Ltd..

Copying, using, or distributing the information in this document in whole or in part is permitted only to the U.S.

Nuclear Regulatory Commission and its contractors for the purpose of reviewing design certification application materials. Other uses are strictly prohibited without the written permission of Korea Electric Power Corporation and Korea Hydro & Nuclear Power Co., Ltd.

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP iii Non-Proprietary UABSTRACT This technical report provides the response time analysis of safety instrumentation and control (I&C) system which is intended to be used for Nuclear Regulatory Commission (NRC) Design Certification application of the APR1400.

The safety function of safety I&C system regarding response time analysis is divided into reactor trip (RT) function and engineered safety features (ESF) actuation function. The response time of RT function is defined as the time interval from when the monitored parameter exceeds the trip setpoint value at the input to the sensor until electrical power is interrupted to the control element assembly (CEA) drive mechanism. The response time of ESF actuation function is defined as the time interval from when the monitored parameter exceeds the trip setpoint value at the input to the sensor until the final component such as pump, valve, damper or fan actuates. This report demonstrates that the total response time allocated to the individual components of the safety I&C system such as sensor, signal processing module, digital computer, actuation device does not exceed the corresponding RT or ESF response time requirement assumed in the safety analysis.

This document also demonstrates in Appendix A that the APR1400 safety I&C system conforms to NUREG-0800 Branch Technical Position (BTP) 7-21.

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP iv Non-Proprietary TABLE OF CONTENTS 1

INTRODUCTION.................................................................................................. 1 1.1 Purpose.......................................................................................................................................... 1 1.2 Scope.............................................................................................................................................. 1 2

CODES AND STANDARD..................................................................................... 2 3

SAFETY I&C SYSTEM DESCRIPTION................................................................. 3 3.1 Safety Functions............................................................................................................................. 3 3.2 Assumptions................................................................................................................................... 4 4

RESPONSE TIME REQUIREMENTS..................................................................... 5 4.1 Response Time Requirements for RT Functions........................................................................... 5 4.2 Response Time Requirements for ESF Actuation Functions......................................................... 6 5

SIGNAL PATHS................................................................................................... 8 5.1 Response time of the RT system................................................................................................... 8 5.2 Response time of the ESF actuation system................................................................................. 9 6

RESPONSE TIME ALLOCATION........................................................................ 10 6.1 LPP for Reactor Trip..................................................................................................................... 10 6.2 HPP for Reactor Trip.................................................................................................................... 10 6.3 LSGL for Reactor Trip.................................................................................................................. 10 6.4 HSGL for Reactor Trip.................................................................................................................. 11 6.5 LSGP for Reactor Trip.................................................................................................................. 11 6.6 HCP for Reactor Trip.................................................................................................................... 11 6.7 LRCF for Reactor Trip.................................................................................................................. 11 6.8 HVOPT for Reactor Trip............................................................................................................... 12 6.9 HLPL for Reactor Trip................................................................................................................... 12 6.10 HLPD FOR REACTOR TRIP........................................................................................................ 12 6.10.1 ENFMS Detectors......................................................................................................................... 12 6.10.2 CEA Positions............................................................................................................................... 13 6.10.3 CEAC Penalty Factor................................................................................................................... 13 6.11 LDNBR for Reactor Trip............................................................................................................... 13 6.11.1 ENFMS Detectors......................................................................................................................... 13 6.11.2 CEA Positions............................................................................................................................... 14 6.11.3 Cold Leg Temperature.................................................................................................................. 14 6.11.4 Hot Leg Temperature................................................................................................................... 14 6.11.5 Primary Coolant Pump Shaft Speed............................................................................................ 14

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP v

Non-Proprietary 6.11.6 Reactor Coolant Pressure from Pressurizer................................................................................. 15 6.11.7 CEAC Penalty Factor................................................................................................................... 15 6.12 LPP for ESF Actuation.................................................................................................................. 15 6.12.1 Safety Injection............................................................................................................................. 15 6.12.2 Containment Isolation................................................................................................................... 16 6.13 HCP for ESF Actuation................................................................................................................. 16 6.13.1 Safety Injection............................................................................................................................. 16 6.13.2 Containment Isolation................................................................................................................... 17 6.13.3 Main Steam Isolation.................................................................................................................... 17 6.14 HHCP for ESF Actuation.............................................................................................................. 18 6.14.1 Containment Spray Pump............................................................................................................ 18 6.14.2 Containment Isolation Valves Closed on CSAS........................................................................... 18 6.15 LSGP FOR ESF ACTUATION...................................................................................................... 18 6.15.1 Main Steam Isolation.................................................................................................................... 18 6.16 LSGL FOR ESF ACTUATION...................................................................................................... 19 6.16.1 Auxiliary Feedwater Pump (motor driven).................................................................................... 19 6.16.2 Auxiliary Feedwater Pump (turbine driven).................................................................................. 19 6.17 HSGL for ESF Actuation............................................................................................................... 20 6.17.1 Main Steam Isolation.................................................................................................................... 20 6.18 CREVAS....................................................................................................................................... 20 6.19 FHEVAS....................................................................................................................................... 21 6.19.1 Spent Fuel Pool Area Radiation - High........................................................................................ 21 6.20 CPIAS........................................................................................................................................... 21 6.20.1 Containment Upper Operating Area / Operating Area Radiation - High..................................... 21 7

RESPONSE TIME ANALYSIS............................................................................. 22 7.1 LPP for Reactor Trip..................................................................................................................... 22 7.2 HPP for Reactor Trip.................................................................................................................... 23 7.3 LSGL for Reactor Trip.................................................................................................................. 24 7.4 HSGL for Reactor Trip.................................................................................................................. 26 7.5 LSGP FOR REACTOR TRIP........................................................................................................ 27 7.6 HCP for Reactor Trip.................................................................................................................... 28 7.7 LRCF for Reactor Trip.................................................................................................................. 29 7.8 HVOPT for Reactor Trip............................................................................................................... 31 7.9 HLPL for Reactor Trip................................................................................................................... 32 7.10 HLPD FOR REACTOR TRIP........................................................................................................ 33 7.10.1 ENFMS Detector.......................................................................................................................... 33

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP vi Non-Proprietary 7.10.2 CEA Positions............................................................................................................................... 36 7.10.3 CEAC Penalty Factor................................................................................................................... 38 7.11 LDNBR FOR REACTOR TRIP..................................................................................................... 40 7.11.1 ENFMS Detectors......................................................................................................................... 40 7.11.2 CEA Positions............................................................................................................................... 42 7.11.3 Cold Leg Temperature.................................................................................................................. 45 7.11.4 Hot Leg Temperature................................................................................................................... 46 7.11.5 Primary Coolant Pump Shaft Speed............................................................................................ 48 7.11.6 Reactor Coolant Pressure from Pressurizer................................................................................. 50 7.11.7 CEAC Penalty Factor................................................................................................................... 52 7.12 LPP FOR ESF ACTUATION........................................................................................................ 54 7.12.1 Safety Injection............................................................................................................................. 55 7.12.2 Containment Isolation................................................................................................................... 57 7.13 HCP for ESF Actuation................................................................................................................. 61 7.13.1 Safety Injection............................................................................................................................. 61 7.13.2 Containment Isolation................................................................................................................... 64 7.13.3 Main Steam Isolation.................................................................................................................... 68 7.14 HHCP for ESF Actuation.............................................................................................................. 71 7.14.1 Containment spray pump............................................................................................................. 71 7.14.2 Containment isolation valves closed on CSAS............................................................................ 75 7.15 LSGP for ESF Actuation............................................................................................................... 77 7.15.1 Main Steam Isolation.................................................................................................................... 77 7.16 LSGL FOR ESF-ACTUATION...................................................................................................... 81 7.16.1 Auxiliary Feedwater Pump (motor driven).................................................................................... 81 7.16.2 Auxiliary Feedwater Pump (turbine driven).................................................................................. 84 7.17 HSGL FOR ESF-ACTUATION..................................................................................................... 85 7.17.1 Main Steam Isolation.................................................................................................................... 86 7.18 CREVAS....................................................................................................................................... 89 7.18.1 Control room air intake radiation - High....................................................................................... 89 7.19 FHEVAS....................................................................................................................................... 93 7.19.1 Spent fuel pool area radiation - High........................................................................................... 93 7.20 CPIAS........................................................................................................................................... 96 7.20.1 Containment upper operating area / operating area radiation - High.......................................... 96 7.21 SIGNAL PATH OF THE ESF-CCS............................................................................................... 98 7.21.1 Signal Path Case 1....................................................................................................................... 99 7.21.2 Signal Path Case 2..................................................................................................................... 100

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP vii Non-Proprietary 7.21.3 Signal Path Case 3..................................................................................................................... 100 7.21.4 Signal Path Case 4..................................................................................................................... 101 7.21.5 Signal Path Case 5..................................................................................................................... 101 7.21.6 Signal Path Case 6..................................................................................................................... 102 7.21.7 Signal Path Case 7..................................................................................................................... 102 7.21.8 Signal Path Case 8..................................................................................................................... 102 8

REFERENCES.................................................................................................. 104 9

DEFINITIONS.................................................................................................. 105 APPENDIX A CONFORMANCE TO BTP 7-21................................................................ A1

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP viii Non-Proprietary LIST OF TABLES Table 4.1-1 Response Times for RT Functions............................................................................................ 5 Table 4.2-1 Response Times for ESF Actuation Functions.......................................................................... 6 Table 5.1-1 Signal Path for RT Functions..................................................................................................... 8 Table 5.2-1 Signal Path for ESF Actuation Functions.................................................................................. 9 Table 6.1-1 Response Time Allocation for LPP.......................................................................................... 10 Table 6.2-1 Response Time Allocation for HPP......................................................................................... 10 Table 6.3-1 Response Time Allocation for LSGL....................................................................................... 10 Table 6.4-1 Response Time Allocation for HSGL....................................................................................... 11 Table 6.5-1 Response Time Allocation for LSGP....................................................................................... 11 Table 6.6-1 Response Time Allocation for HCP......................................................................................... 11 Table 6.7-1 Response Time Allocation for LRCF....................................................................................... 11 Table 6.8-1 Response Time Allocation for HVOPT.................................................................................... 12 Table 6.9-1 Response Time Allocation for HLPL........................................................................................ 12 Table 6.10-1 Response Time Allocation for ENFMS Detector (HLPD)...................................................... 12 Table 6.10-2 Response Time Allocation for CEA Positions (HLPD)........................................................... 13 Table 6.10-3 Response Time Allocation for CEAC Penalty Factor (HLPD)............................................... 13 Table 6.11-1 Response Time Allocation for ENFMS Detector (LDNBR).................................................... 13 Table 6.11-2 Response Time Allocation for CEA Positions (LDNBR)........................................................ 14 Table 6.11-3 Response Time Allocation for Cold Leg Temperature (LDNBR)........................................... 14 Table 6.11-4 Response Time Allocation for Hot Leg Temperature (LDNBR)............................................. 14 Table 6.11-5 Response Time Allocation for Primary Coolant Pump Shaft Speed (LDNBR)...................... 14 Table 6.11-6 Response Time Allocation for Reactor Coolant Pressure (LDNBR)..................................... 15 Table 6.11-7 Response Time Allocation for CEAC Penalty Factor (LDNBR)............................................. 15 Table 6.12-1 Response Time Allocation for LPP for ESF actuation - Safety Injection Actuation Signal (SIAS).................................................................................................................................... 15 Table 6.12-2 Response Time Allocation for LPP for ESF actuation - CIAS actuated low volume purge valves..................................................................................................................................... 16 Table 6.12-3 Response Time Allocation for LPP for ESF actuation - Other CIAS actuated valves.......... 16 Table 6.13-1 Response Time Allocation for HCP for ESF actuation - SIAS............................................... 16 Table 6.13-2 Response Time Allocation for HCP for ESF actuation - CIAS actuated low volume purge valves..................................................................................................................................... 17 Table 6.13-3 Response Time Allocation for HCP for ESF actuation - CIAS actuated low volume purge valves..................................................................................................................................... 17 Table 6.13-4 Response Time Allocation for HCP for ESF actuation - MSIS actuated MSIVs................... 17 Table 6.13-5 Response Time Allocation for HCP for ESF actuation - MSIS actuated MFIVs................... 17 Table 6.14-1 Response Time Allocation for HHCP for ESF actuation - Containment Spray Pump.......... 18

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP ix Non-Proprietary Table 6.14-2 Response Time Allocation for HHCP for ESF actuation - Containment Isolation Valves Closed on CSAS.................................................................................................................... 18 Table 6.15-1 Response Time Allocation for LSGP for ESF actuation - MSIS actuated MSIVs................. 18 Table 6.15-2 Response Time Allocation for LSGP for ESF actuation - MSIS actuated MFIVs................. 19 Table 6.16-1 Response Time Allocation for LSGL for ESF actuation - Auxiliary Feedwater Pump (motor driven).................................................................................................................................... 19 Table 6.16-2 Response Time Allocation for LSGL for ESF actuation - Auxiliary Feedwater Pump (turbine driven).................................................................................................................................... 19 Table 6.17-1 Response Time Allocation for HSGL for ESF actuation - MSIS actuated MSIVs................ 20 Table 6.17-2 Response Time Allocation for HSGL for ESF actuation - MSIS actuated MFIVs................. 20 Table 6.18-1 Response Time Allocation for CREVAS for ESF actuation - CREVAS actuated isolation dampers................................................................................................................................. 20 Table 6.18-2 Response Time Allocation for CREVAS for ESF actuation - Emergency makeup ACU fan 20 Table 6.19-1 Response Time Allocation for FHEVAS for ESF actuation - FHEVAS actuated isolation dampers................................................................................................................................. 21 Table 6.19-2 Response Time Allocation for FHEVAS for ESF actuation - Emergency makeup ACU fan 21 Table 6.20-1 Response Time Allocation for CPIAS for ESF actuation - CPIAS actuated isolation valves 21 Table 7.21-1 Signal Path for each ESF-CCS Response Time................................................................... 98

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP x

Non-Proprietary LIST OF FIGURES Figure 7.1-1 LPP Reactor Trip Function..................................................................................................... 22 Figure 7.1-2 Response Time Analysis for PPS........................................................................................... 22 Figure 7.2-1 HPP Reactor Trip Function..................................................................................................... 23 Figure 7.2-2 Response Time Analysis for PPS........................................................................................... 24 Figure 7.3-1 LSGL Reactor Trip Function................................................................................................... 25 Figure 7.3-2 Response Time Analysis for PPS........................................................................................... 25 Figure 7.4-1 HSGL Reactor Trip Function.................................................................................................. 26 Figure 7.4-2 Response Time Analysis for PPS........................................................................................... 26 Figure 7.5-1 LSGP Reactor Trip Function.................................................................................................. 27 Figure 7.5-2 Response Time Analysis for PPS........................................................................................... 28 Figure 7.6-1 HCP Reactor Trip Function.................................................................................................... 28 Figure 7.6-2 Response Time Analysis for PPS........................................................................................... 29 Figure 7.7-1 LRCF Reactor Trip Function................................................................................................... 30 Figure 7.7-2 Response Time Analysis for PPS........................................................................................... 30 Figure 7.8-1 HVOPT Reactor Trip Function................................................................................................ 31 Figure 7.8-2 Response Time Analysis for PPS........................................................................................... 31 Figure 7.9-1 HLPL Reactor Trip Function................................................................................................... 32 Figure 7.9-2 Response Time Analysis for PPS........................................................................................... 33 Figure 7.10-1 Response Time Analysis for ENFMS Detector.................................................................... 34 Figure 7.10-2 Response Time Analysis for CPCS...................................................................................... 34 Figure 7.10-3 Response Time Analysis for PPS........................................................................................ 35 Figure 7.10-4 Response Time Analysis for CEA Positions......................................................................... 36 Figure 7.10-5 Response Time Analysis for CPCS...................................................................................... 36 Figure 7.10-6 Response Time Analysis for PPS........................................................................................ 37 Figure 7.10-7 Response Time Analysis for CEAC Penalty Factor............................................................. 38 Figure 7.10-8 Response Time Analysis for CPCS...................................................................................... 39 Figure 7.10-9 Response Time Analysis for PPS........................................................................................ 40 Figure 7.11-1 Response Time Analysis for ENFMS Detector.................................................................... 41 Figure 7.11-2 Response Time Analysis for CPCS...................................................................................... 41 Figure 7.11-3 Response Time Analysis for PPS........................................................................................ 42 Figure 7.11-4 Response Time Analysis for CEA Positions......................................................................... 43 Figure 7.11-5 Response Time Analysis for CPCS...................................................................................... 43 Figure 7.11-6 Response Time Analysis for PPS........................................................................................ 44 Figure 7.11-7 Response Time Analysis for Cold Leg Temperature............................................................ 45

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP xi Non-Proprietary Figure 7.11-8 Response Time Analysis for CPCS...................................................................................... 45 Figure 7.11-9 Response Time Analysis for PPS........................................................................................ 46 Figure 7.11-10 Response Time Analysis for Hot Leg Temperature........................................................... 47 Figure 7.11-11 Response Time Analysis for CPCS.................................................................................... 47 Figure 7.11-12 Response Time Analysis for PPS...................................................................................... 48 Figure 7.11-13 Response Time Analysis for Primary Coolant Pump Shaft Speed.................................... 49 Figure 7.11-14 Response Time Analysis for CPCS.................................................................................... 49 Figure 7.11-15 Response Time Analysis for PPS...................................................................................... 50 Figure 7.11-16 Response Time Analysis for Reactor Coolant Pressure.................................................... 51 Figure 7.11-17 Response Time Analysis for CPCS.................................................................................... 51 Figure 7.11-18 Response Time Analysis for PPS...................................................................................... 52 Figure 7.11-19 Response Time Analysis for CEAC Penalty Factor........................................................... 53 Figure 7.11-20 Response Time Analysis for CPCS.................................................................................... 53 Figure 7.11-21 Response Time Analysis for PPS...................................................................................... 54 Figure 7.12-1 Response Time Analysis for Safety Injection....................................................................... 55 Figure 7.12-2 Response Time Analysis for PPS........................................................................................ 55 Figure 7.12-3 Response Time Analysis for ESF-CCS................................................................................ 56 Figure 7.12-4 Response Time Analysis for CIAS actuated low volume purge valves................................ 57 Figure 7.12-5 Response Time Analysis for PPS........................................................................................ 57 Figure 7.12-6 Response Time Analysis for ESF-CCS................................................................................ 58 Figure 7.12-7 Response Time Analysis for Other CIAS actuated Valves.................................................. 59 Figure 7.12-8 Response Time Analysis for PPS........................................................................................ 59 Figure 7.12-9 Response Time Analysis for ESF-CCS when loss of offsite power..................................... 60 Figure 7.12-10 Response Time Analysis for ESF-CCS when offsite power is available............................ 61 Figure 7.13-1 Response Time Analysis for Safety Injection....................................................................... 62 Figure 7.13-2 Response Time Analysis for PPS........................................................................................ 62 Figure 7.13-3 Response Time Analysis for ESF-CCS................................................................................ 63 Figure 7.13-4 Response Time Analysis for CIAS actuated low volume purge valves................................ 64 Figure 7.13-5 Response Time Analysis for PPS........................................................................................ 64 Figure 7.13-6 Response Time Analysis for ESF-CCS................................................................................ 65 Figure 7.13-7 Response Time Analysis for Other CIAS actuated valves................................................... 66 Figure 7.13-8 Response Time Analysis for PPS........................................................................................ 66 Figure 7.13-9 Response Time Analysis for ESF-CCS when loss of offsite power..................................... 67 Figure 7.13-10 Response Time Analysis for ESF-CCS when offsite power is available............................ 68 Figure 7.13-11 Response Time Analysis for MSIS actuated MSIVs.......................................................... 68 Figure 7.13-12 Response Time Analysis for PPS...................................................................................... 69

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP xii Non-Proprietary Figure 7.13-13 Response Time Analysis for ESF-CCS.............................................................................. 69 Figure 7.13-14 Response Time Analysis for MSIS actuated MFIVs.......................................................... 70 Figure 7.13-15 Response Time Analysis for PPS...................................................................................... 70 Figure 7.13-16 Response Time Analysis for ESF-CCS.............................................................................. 71 Figure 7.14-1 Response Time Analysis for Containment Spray Pump...................................................... 72 Figure 7.14-2 Response Time Analysis for PPS........................................................................................ 72 Figure 7.14-3 Response Time Analysis for ESF-CCS when loss of offsite power..................................... 73 Figure 7.14-4 Response Time Analysis for ESF-CCS when offsite power is available.............................. 74 Figure 7.14-5 Response Time Analysis for Containment isolation valves closed on CSAS...................... 75 Figure 7.14-6 Response Time Analysis for PPS........................................................................................ 75 Figure 7.14-7 Response Time Analysis for ESF-CCS when loss of offsite power..................................... 76 Figure 7.14-8 Response Time Analysis for ESF-CCS when offsite power is available.............................. 77 Figure 7.15-1 Response Time Analysis for MSIS actuated MSIVs............................................................ 78 Figure 7.15-2 Response Time Analysis for PPS........................................................................................ 78 Figure 7.15-3 Response Time Analysis for ESF-CCS................................................................................ 79 Figure 7.15-4 Response Time Analysis for MSIS actuated MFIVs............................................................. 80 Figure 7.15-5 Response Time Analysis for PPS........................................................................................ 80 Figure 7.15-6 Response Time Analysis for ESF-CCS................................................................................ 81 Figure 7.16-1 Response Time Analysis for Auxiliary Feedwater Pump (motor driven).............................. 82 Figure 7.16-2 Response Time Analysis for PPS........................................................................................ 82 Figure 7.16-3 Response Time Analysis for ESF-CCS when loss of offsite power..................................... 83 Figure 7.16-4 Response Time Analysis for Auxiliary Feedwater Pump (turbine driven)............................ 84 Figure 7.16-5 Response Time Analysis for PPS........................................................................................ 84 Figure 7.16-6 Response Time Analysis for ESF-CCS................................................................................ 85 Figure 7.17-1 Response Time Analysis for MSIS actuated MSIVs............................................................ 86 Figure 7.17-2 Response Time Analysis for PPS........................................................................................ 86 Figure 7.17-3 Response Time Analysis for ESF-CCS................................................................................ 87 Figure 7.17-4 Response Time Analysis for MSIS actuated MFIVs............................................................. 88 Figure 7.17-5 Response Time Analysis for PPS........................................................................................ 88 Figure 7.17-6 Response Time Analysis for ESF-CCS................................................................................ 89 Figure 7.18-1 Response Time Analysis for CREVAS actuated isolation dampers..................................... 90 Figure 7.18-2 Response Time Analysis for RMS........................................................................................ 90 Figure 7.18-3 Response Time Analysis for ESF-CCS................................................................................ 91 Figure 7.18-4 Response Time Analysis for Emergency makeup ACU fan................................................. 91 Figure 7.18-5 Response Time Analysis for RMS........................................................................................ 92 Figure 7.18-6 Response Time Analysis for ESF-CCS................................................................................ 92

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP xiii Non-Proprietary Figure 7.19-1 Response Time Analysis for FHEVAS actuated isolation dampers..................................... 93 Figure 7.19-2 Response Time Analysis for RMS........................................................................................ 93 Figure 7.19-3 Response Time Analysis for ESF-CCS................................................................................ 94 Figure 7.19-4 Response Time Analysis for Emergency ACU fan............................................................... 94 Figure 7.19-5 Response Time Analysis for RMS........................................................................................ 95 Figure 7.19-6 Response Time Analysis for ESF-CCS................................................................................ 95 Figure 7.20-1 Response Time Analysis for CPIAS actuated isolation valves............................................ 96 Figure 7.20-2 Response Time Analysis for RMS........................................................................................ 96 Figure 7.20-3 Response Time Analysis for ESF-CCS................................................................................ 97

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP xiv Non-Proprietary ACRONYMS AND ABBREVIATIONS ACU air cleaning unit AFAS auxiliary feedwater actuation signal AIM analog input module APC-S auxiliary process cabinet - safety BP bistable processor BTP branch technical position CEA control element assembly CEAC control element assembly calculator CEDM control element drive mechanism CIAS containment isolation actuation signal CPCS core protection calculator system CPIAS containment purge isolation actuation signal CPU central processing unit CREVAS control room emergency ventilation actuation signal CSAS containment spray actuation signal CTRLM control module DCD design control document DOM digital output module EDG emergency diesel generator ENFMS ex-core neutron flux monitoring system ESF engineered safety features ESF-CCS engineered safety feature - component control system FHEVAS fuel handling area emergency ventilation actuation signal HCP high containment pressure HHCP high-high containment pressure HLPD high local power density HLPL high logarithmic power level HPP high pressurizer pressure HSGL high steam generator level HVOPT high variable overpower trip I&C instrumentation and control IR interposing relay ITAAC Inspections, tests, analyses, and acceptance criteria LCL local coincidence logic LDNBR low departure from nucleate boiling ratio LPP low pressurizer pressure LRCF low reactor coolant flow LSGL low steam generator level LSGP low steam generator pressure MFIV main feedwater isolation valve MSIS main steam isolation signal MSIV main steam isolation valve

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP xv Non-Proprietary NRC U.S. Nuclear Regulatory Commission PLC programmable logic control PPS plant protection system PROM programmable read only memory RCPSSSS reactor coolant pump shaft speed sensing system RSPT reed switch position transmitter RT reactor trip RTD resistance temperature detector RTSS reactor trip switchgear system SDL serial data link SIAS safety injection actuation signal SRP standard review plan TD time delay

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 1

Non-Proprietary 1

INTRODUCTION 1.1 Purpose The purpose of this technical report is to demonstrate that the sum of individual response time allocated to each component on the critical path of safety I&C system functions does not exceed the response time assumed in the APR1400 safety analysis.

This technical report also demonstrates that the safety I&C system for APR1400 conforms to NUREG-0800 branch technical position (BTP) 7-21.

1.2 Scope This technical report provides the response time analysis of APR1400 safety I&C system, which includes the response times of the reactor trip (RT) system and the engineered safety features (ESF) actuation system.

The response time analysis of safety I&C system consists of defining the response time requirement for each safety I&C system function, determining the safety system signal path for each trip function, allocating individual response time to each component on the signal path, and analyzing safety system response time for each trip function.

This document also provides conformance of the safety I&C system of APR1400 to the seven acceptance criteria of NUREG-0800 BTP 7-21.

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 2

Non-Proprietary 2

CODES AND STANDARD This section describes the applicable or reference codes, regulations and standard used for the basis of response time analysis for APR1400 safety I&C system. The general design criteria (GDC) is described to identify the overall requirements for the response time, while these criteria are also addressed in the APR1400 design control document (DCD) (Reference 1) and the Safety I&C System TeR (Reference 2) as the compliance commitment for the response time.

2.1. GDC 10, Reactor Design, 10CFR50 Appendix A.

2.2. GDC 13, Instrumentation and Control, 10CFR50 Appendix A.

2.3. GDC 20, Protection System Functions, 10CFR50 Appendix A.

2.4. GDC 29, Protection Against Anticipated Operational Occurrences, 10CFR50 Appendix A.

2.5. Guidance on Digital Computer Real-Time Performance, NUREG-0800 BTP 7-21, Revision 5.

2.6. Setpoints for Nuclear Safety-Related Instrumentation, ANSI/ISA-67.04, Part I, 1994.

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 3

Non-Proprietary 3

SAFETY I&C SYSTEM DESCRIPTION 3.1 Safety Functions The safety functions of safety I&C system regarding response time analysis consist of RT functions and ESF actuation functions. The safety I&C system is designed in accordance with Sections 2.1 through 2.6.

All trip parameters of RT functions and ESF actuation functions are as follows:

(1) RT functions Low Pressurizer Pressure (LPP)

High Pressurizer Pressure (HPP)

Low Steam Generator Level (LSGL)

High Steam Generator Level (HSGL)

Low Steam Generator Pressure (LSGP)

High Containment Pressure (HCP)

Low Reactor Coolant Flow (LRCF)

High Local Power Density (HLPD)

Low Departure from Nucleate Boiling Ratio (LDNBR)

High Variable Overpower Trip (HVOPT)

High Logarithmic Power Level (HLPL)

(2) ESF actuation functions Low Pressurizer Pressure

- Safety Injection

- Containment Isolation High Containment Pressure

- Safety injection

- Containment isolation

- Main steam isolation High-High Containment Pressure (HHCP)

- Containment spray pump

- Containment isolation valves closed on containment spray actuation signal (CSAS)

Low Steam Generator Pressure

- Main steam isolation Low Steam Generator Level

- Auxiliary feedwater pump (motor driven)

- Auxiliary feedwater pump (turbine driven)

High Steam Generator Level

- Main steam isolation Control Room Emergency Ventilation Actuation Signal (CREVAS)

- CREVAS actuated isolation dampers

- Emergency makeup air cleaning unit (ACU) fan

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 4

Non-Proprietary Fuel Handling Area Emergency Ventilation Actuation Signal (FHEVAS)

- FHEVAS actuated isolation dampers

- emergency makeup ACU fan Containment Purge Isolation Actuation Signal (CPIAS)

- CPIAS actuated isolation dampers 3.2 Assumptions 3.2.1 If a total allocated response time is the same as its response time requirement, it is assumed that sufficient margin between an individual component response time and its allocated response time is maintained.

3.2.2 Response time requirements for RT function do not include Control Element Drive Mechanism (CEDM) release time and rod drop time that are assumed in the safety analysis.

3.2.3 Response time allocations for transmitters, auxiliary process cabinet - safety (APC-S), plant protection system (PPS), core protection calculator system (CPCS), engineered safety feature -

component control system (ESF-CCS), reactor trip switchgear system (RTSS), radiation monitoring system (RMS), damper, fan, pump and valve are based on actual response time from Shin-Kori Nuclear Power Plant Units 3 and 4. These will be confirmed for as-built APR1400 components through APR1400 design certification inspections, tests, analyses, and acceptance criteria (ITAAC).

3.2.4 In order to ensure 75% maximum central processing unit (CPU) load, configuration restrictions and tests required by Reference 5 will be incorporated into the CPCS design. The PPS and ESF-CCS will be designed not to exceed 70% of CPU full load.

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 5

Non-Proprietary 4

RESPONSE TIME REQUIREMENTS The response time requirements for safety I&C system trip parameters are described in Tables 4.1 and 4.2 below and based on Tables 7.2-5 and 7.3-7 of the DCD (Reference 1). The safety analysis establishes an analytical limit in terms of a measured or calculated variable and a specific time after that value is reached to begin protective action. According to section 2.6 of this TeR, satisfying these two constraints will ensure that the safety limit will not be exceeded during anticipated operational occurrences and postulated accidents. The response times assumed in the safety analysis are established as the response time requirements for RT function and ESF actuation function.

4.1 Response Time Requirements for RT Functions Table 4.1-1 Response Times for RT Functions No.

Function Response Time(s) 1 LPP 1.15 2

HPP 0.85 3

LSGL 1.25 4

HSGL 1.15 5

LSGP 1.15 6

HCP 1.15 7

LRCF 0.7 8

HLPD Ex-core neutron flux monitoring system (ENFMS)

Detectors 0.651)

CEA positions 1.452)

CEA calculator (CEAC) penalty factor 0.852) 9 LDNBR ENFMS detectors 0.651)

CEA positions 1.452)

Cold leg temperature 8.653)

Hot leg temperature 8.653)

Primary coolant pump shaft speed 0.454)

Reactor coolant pressure from pressurizer 0.955)

CEAC penalty factor 0.852) 10 HVOPT 0.551) 11 HLPL 0.551)

1) Neutron detectors are exempt from response time testing. The response time of neutron flux signal portion of the channel is measured from the detector output or from the input of first electronic component in channel.
2) Response time is measured from the output of the sensor.
3) Response time is measured from the output of the resistance temperature detector (RTD). RTD response time is measured at least once per 18 months. The measured response time of the slowest RTD is less than or equal to 8.0 seconds.

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 6

Non-Proprietary

4) The pulse transmitters measuring pump speed are exempt from response time testing. The response time is measured from the pulse shaper input.
5) Response time is measured from the output of the pressure transmitter. The transmitter response time is less than or equal to 0.3 second.

4.2 Response Time Requirements for ESF Actuation Functions Table 4.2-1 Response Times for ESF Actuation Functions No.

Function Initiating Signal

Response

Time(s)(1) 1 LPP Safety Injection 40 Containment Isolation Containment isolation actuation signal (CIAS) actuated low volume purge valves 5

Other CIAS actuated valves 83.52) / 62.03) 2 HCP Safety Injection 40 Containment Isolation CIAS actuated low volume purge valves 5

Other CIAS actuated valves 83.52) / 62.03)

Main Steam Isolation Main steam isolation signal (MSIS) actuated main steam isolation valves (MSIVs) 6.35 MSIS actuated main feedwater isolation valves (MFIVs) 11.35 3

HHCP Containment spray pump 50.44),6) /28.55),6)

Containment isolation valves closed on CSAS 73.52) / 52.03) 4 LSGP Main Steam Isolation MSIS actuated MSIVs 6.35 MSIS actuated MFIVs 11.35 5

LSGL Auxiliary feedwater pump (motor driven) 61.454)

Auxiliary feedwater pump (turbine driven) 61.45 6

HSGL Main Steam Isolation MSIS actuated MSIVs 6.35 MSIS actuated MFIVs 11.35 7

CREVAS Control room air intake radiation -

High CREVAS actuated isolation dampers 8.47),8)

Emergency makeup ACU fan 5.07),8),9) 8 FHEVAS Spent fuel pool area radiation -

High FHEVAS actuated isolation dampers 8.47),8),9)

Emergency makeup ACU fan 5.07),8) 9 CPIAS Containment upper operating area /

operating area radiation - High CPIAS actuated isolation valves 9.97),8)

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 7

Non-Proprietary Notes

1) PPS cabinet delays are included.
2) A loss of offsite power. Emergency diesel generator (EDG) starting delay is included. Response time includes movement of valves and attainment of pump or blower discharge pressure.
3) Offsite power is available. EDG starting delay is not included. Response time includes movement of valves and attainment of pump or blower discharge pressure.
4) Same as No. 2. In addition, delays of load-sequencing are included.
5) Same as No. 3. In addition, delays of load-sequencing are included.
6) Spray line fill time is not included.
7) EDG starting delay is not included.
8) The response time of the radiation detectors is not included. The response time of the radiation signal portion of the channel is measured from the detector output or from the input of the first electronic component in channel to closure of dampers / valves or start fans.
9) Fan motor run-up time is not included since the building volume is too large to make a substantial change to pressure compared to the isolation functions.

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 8

Non-Proprietary 5

SIGNAL PATHS This section describes the signal path of the safety I&C system. The safety I&C system configuration required to determine signal paths of RT system and ESF actuation system is delineated in Sections 7.1, 7.2, and 7.3 of DCD (Reference 1) and Section 4 of the safety I&C system TeR (Reference 2). The APC-S is to perform the distribution of a transmitters output signal. If the output signal has another destination in addition to the PPS, the APC-S is located between the transmitter and the PPS to split and distribute the signal.

5.1 Response time of the RT system The signal path for each trip parameter of RT functions is provided in Table 5.1-1.

Table 5.1-1 Signal Path for RT Functions No.

Parameter Signal Path 1

LPP Transmitter APC-S PPS RTSS 2

HPP 3

LSGL 4

HSGL Transmitter PPS RTSS 5

LSGP Transmitter APC-S PPS RTSS 6

HCP Transmitter PPS RTSS 7

LRCF 8

HLPD ENFMS Detectors Neutron Detectors ENFMS CPCS PPS RTSS CEA Positions Reed Switch Position Transmitter (RSPT) CPCS PPS RTSS CEAC Penalty Factor 9

LDNBR ENFMS Detectors Neutron Detectors ENFMS CPCS PPS RTSS Cold Leg Temperature Temperature Sensor CPCS PPS RTSS Hot Leg Temperature Primary Coolant Pump Shaft Speed Reactor coolant pump shaft speed sensing system (RCPSSSS) CPCS PPS RTSS Reactor Coolant Pressure Transmitter APC-S CPCS PPS RTSS CEA Positions RSPT CPCS PPS RTSS CEAC Penalty Factor 10 HVOPT Neutron Detectors ENFMS PPS RTSS 11 HLPL

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 9

Non-Proprietary 5.2 Response time of the ESF actuation system The signal path for each trip parameter of ESF actuation system is provided in Table 5.2-1.

Table 5.2-1 Signal Path for ESF Actuation Functions No.

Function Initiating Signal Signal Path 1

LPP Safety Injection Transmitter APC-S PPS ESF-CCS Pump/Valve Containment Isolation CIAS actuated low volume purge valves Other CIAS actuated Valves 2

HCP Safety Injection Transmitter PPS ESF-CCS Pump/Valve Containment Isolation CIAS actuated low volume purge valves Other CIAS actuated valves Main Steam Isolation MSIS actuated MSIVs MSIS actuated MFIVs 3

HHCP Containment spray pump Containment isolation valves closed on CSAS 4

LSGP Main Steam Isolation MSIS actuated MSIVs Transmitter APC-S PPS ESF-CCS Pump/Valve MSIS actuated MFIVs 5

LSGL Auxiliary feedwater pump (motor driven)

Auxiliary feedwater pump (turbine driven) 6 HSGL Main Steam Isolation MSIS actuated MSIVs Transmitter PPS ESF-CCS Pump/Valve MSIS actuated MFIVs 7

CREVAS Control room air intake radiation -

High CREVAS actuated isolation dampers RMS ESF-CCS Damper/Fan/Valve Emergency makeup ACU fan 8

FHEVAS Spent fuel pool area radiation - High FHEVAS actuated isolation dampers Emergency makeup ACU fan 9

CPIAS Containment upper operating area /

operating area radiation - High CPIAS actuated isolation valves

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 10 Non-Proprietary 6

RESPONSE TIME ALLOCATION This section describes the allocation of individual response time to each component on the critical signal path of the safety I&C system.

6.1 LPP for Reactor Trip Table 6.1-1 Response Time Allocation for LPP No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

RTSS Total Requirement 1.150 6.2 HPP for Reactor Trip Table 6.2-1 Response Time Allocation for HPP No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

RTSS Total Requirement 0.850 6.3 LSGL for Reactor Trip Table 6.3-1 Response Time Allocation for LSGL No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

RTSS Total Requirement 1.250 TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 11 Non-Proprietary 6.4 HSGL for Reactor Trip Table 6.4-1 Response Time Allocation for HSGL No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

RTSS Total Requirement 1.150 6.5 LSGP for Reactor Trip Table 6.5-1 Response Time Allocation for LSGP No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

RTSS Total Requirement 1.150 6.6 HCP for Reactor Trip Table 6.6-1 Response Time Allocation for HCP No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

RTSS Total Requirement 1.150 6.7 LRCF for Reactor Trip Table 6.7-1 Response Time Allocation for LRCF No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

RTSS Total Requirement 0.7 TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 12 Non-Proprietary 6.8 HVOPT for Reactor Trip Table 6.8-1 Response Time Allocation for HVOPT No.

Equipment Allocated Response Time (s) 1 Neutron Detector 2

ENFMS 3

PPS 4

RTSS Total Requirement 0.550 6.9 HLPL for Reactor Trip Table 6.9-1 Response Time Allocation for HLPL No.

Equipment Allocated Response Time (s) 1 Neutron Detector 2

ENFMS 3

PPS 4

RTSS Total Requirement 0.550 6.10 HLPD FOR REACTOR TRIP 6.10.1 ENFMS Detectors Table 6.10-1 Response Time Allocation for ENFMS Detector (HLPD)

No.

Equipment Allocated Response Time (s) 1 Neutron Detector 2

ENFMS 3

CPCS 4

PPS 5

RTSS Total Requirement 0.650

  • The allocated response time of ENFMS is included in that of CPCS.

TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 13 Non-Proprietary 6.10.2 CEA Positions Table 6.10-2 Response Time Allocation for CEA Positions (HLPD)

No.

Equipment Allocated Response Time (s) 1 RSPT 2

CPCS 3

PPS 4

RTSS Total Requirement 1.450 6.10.3 CEAC Penalty Factor Table 6.10-3 Response Time Allocation for CEAC Penalty Factor (HLPD)

No.

Equipment Allocated Response Time (s) 1 RSPT 2

CPCS 3

PPS 4

RTSS Total Requirement 0.850 6.11 LDNBR for Reactor Trip 6.11.1 ENFMS Detectors Table 6.11-1 Response Time Allocation for ENFMS Detector (LDNBR)

No.

Equipment Allocated Response Time (s) 1 Neutron Detector 2

ENFMS 3

CPCS 4

PPS 5

RTSS Total Requirement 0.650

  • The allocated response time of ENFMS is included in that of CPCS.

TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 14 Non-Proprietary 6.11.2 CEA Positions Table 6.11-2 Response Time Allocation for CEA Positions (LDNBR)

No.

Equipment Allocated Response Time (s) 1 RSPT 2

CPCS 3

PPS 4

RTSS Total Requirement 1.450 6.11.3 Cold Leg Temperature Table 6.11-3 Response Time Allocation for Cold Leg Temperature (LDNBR)

No.

Equipment Allocated Response Time (s) 1 Temperature Sensor 2

CPCS 3

PPS 4

RTSS Total Requirement 8.650 6.11.4 Hot Leg Temperature Table 6.11-4 Response Time Allocation for Hot Leg Temperature (LDNBR)

No.

Equipment Allocated Response Time (s) 1 Temperature Sensor 2

CPCS 3

PPS 4

RTSS Total Requirement 8.650 6.11.5 Primary Coolant Pump Shaft Speed Table 6.11-5 Response Time Allocation for Primary Coolant Pump Shaft Speed (LDNBR)

No.

Equipment Allocated Response Time (s) 1 RCPSSSS 2

CPCS 3

PPS TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 15 Non-Proprietary 4

RTSS Total Requirement 0.450 6.11.6 Reactor Coolant Pressure from Pressurizer Table 6.11-6 Response Time Allocation for Reactor Coolant Pressure (LDNBR)

No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

CPCS 4

PPS 5

RTSS Total Requirement 0.950 6.11.7 CEAC Penalty Factor Table 6.11-7 Response Time Allocation for CEAC Penalty Factor (LDNBR)

No.

Equipment Allocated Response Time (s) 1 RSPT 2

CPCS 3

PPS 4

RTSS Total Requirement 0.850 6.12 LPP for ESF Actuation 6.12.1 Safety Injection Table 6.12-1 Response Time Allocation for LPP for ESF actuation - Safety Injection Actuation Signal (SIAS)

No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

ESF-CCS 5

SI Pump Total Requirement 40.000 TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 16 Non-Proprietary 6.12.2 Containment Isolation Table 6.12-2 Response Time Allocation for LPP for ESF actuation - CIAS actuated low volume purge valves No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

ESF-CCS 5

Valve Total Requirement 5.000 Table 6.12-3 Response Time Allocation for LPP for ESF actuation - Other CIAS actuated valves No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

ESF-CCS 5

Valve Total Requirement 83.500 / 62.000 6.13 HCP for ESF Actuation 6.13.1 Safety Injection Table 6.13-1 Response Time Allocation for HCP for ESF actuation - SIAS No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

ESF-CCS 4

SI Pump Total Requirement 40.000 TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 17 Non-Proprietary 6.13.2 Containment Isolation Table 6.13-2 Response Time Allocation for HCP for ESF actuation - CIAS actuated low volume purge valves No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

ESF-CCS 4

Valve Total Requirement 5.000 Table 6.13-3 Response Time Allocation for HCP for ESF actuation - CIAS actuated low volume purge valves No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

ESF-CCS 4

Valve Total Requirement 83.500 / 62.000 6.13.3 Main Steam Isolation Table 6.13-4 Response Time Allocation for HCP for ESF actuation - MSIS actuated MSIVs No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

ESF-CCS 4

Valve Total Requirement 6.350 Table 6.13-5 Response Time Allocation for HCP for ESF actuation - MSIS actuated MFIVs No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

ESF-CCS 4

Valve Total TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 18 Non-Proprietary Requirement 11.350 6.14 HHCP for ESF Actuation 6.14.1 Containment Spray Pump Table 6.14-1 Response Time Allocation for HHCP for ESF actuation - Containment Spray Pump No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

ESF-CCS 4

Pump Total Requirement 50.400 / 28.500 6.14.2 Containment Isolation Valves Closed on CSAS Table 6.14-2 Response Time Allocation for HHCP for ESF actuation - Containment Isolation Valves Closed on CSAS No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

ESF-CCS 4

Valve Total Requirement 73.500 / 52.000 6.15 LSGP FOR ESF ACTUATION 6.15.1 Main Steam Isolation Table 6.15-1 Response Time Allocation for LSGP for ESF actuation - MSIS actuated MSIVs No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

ESF-CCS 5

Valve TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 19 Non-Proprietary Total Requirement 6.350 Table 6.15-2 Response Time Allocation for LSGP for ESF actuation - MSIS actuated MFIVs No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

ESF-CCS 5

Valve Total Requirement 11.350 6.16 LSGL FOR ESF ACTUATION 6.16.1 Auxiliary Feedwater Pump (motor driven)

Table 6.16-1 Response Time Allocation for LSGL for ESF actuation - Auxiliary Feedwater Pump (motor driven)

No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

ESF-CCS 5

Pump Total Requirement 61.450 6.16.2 Auxiliary Feedwater Pump (turbine driven)

Table 6.16-2 Response Time Allocation for LSGL for ESF actuation - Auxiliary Feedwater Pump (turbine driven)

No.

Equipment Allocated Response Time (s) 1 Transmitter 2

APC-S 3

PPS 4

ESF-CCS 5

Pump Total Requirement 61.450 TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 20 Non-Proprietary 6.17 HSGL for ESF Actuation 6.17.1 Main Steam Isolation Table 6.17-1 Response Time Allocation for HSGL for ESF actuation - MSIS actuated MSIVs No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

ESF-CCS 4

Valve Total Requirement 6.350 Table 6.17-2 Response Time Allocation for HSGL for ESF actuation - MSIS actuated MFIVs No.

Equipment Allocated Response Time (s) 1 Transmitter 2

PPS 3

ESF-CCS 4

Valve Total Requirement 11.350 6.18 CREVAS 6.18.1 Control Room Air Intake Radiation -High Table 6.18-1 Response Time Allocation for CREVAS for ESF actuation - CREVAS actuated isolation dampers Propagation No.

Equipment Allocated Response Time (s) 1 RMS 2

ESF-CCS 3

Damper Total Requirement 8.400 Table 6.18-2 Response Time Allocation for CREVAS for ESF actuation - Emergency makeup ACU fan Propagation No.

Equipment Allocated Response Time (s) 1 RMS 2

ESF-CCS 3

Fan Total TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 21 Non-Proprietary Requirement 5.000 6.19 FHEVAS 6.19.1 Spent Fuel Pool Area Radiation - High Table 6.19-1 Response Time Allocation for FHEVAS for ESF actuation - FHEVAS actuated isolation dampers Propagation No.

Equipment Allocated Response Time (s) 1 RMS 2

ESF-CCS 3

Damper Total Requirement 8.400 Table 6.19-2 Response Time Allocation for FHEVAS for ESF actuation - Emergency makeup ACU fan Propagation No.

Equipment Allocated Response Time (s) 1 RMS 2

ESF-CCS 3

Fan Total Requirement 5.000 6.20 CPIAS 6.20.1 Containment Upper Operating Area / Operating Area Radiation - High Table 6.20-1 Response Time Allocation for CPIAS for ESF actuation - CPIAS actuated isolation valves Propagation No.

Equipment Allocated Response Time (s) 1 RMS 2

ESF-CCS 3

Valves Total Requirement 9.900 TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 22 Non-Proprietary 7

RESPONSE TIME ANALYSIS This section provides the results of the safety I&C system response time analysis for each trip function.

The allocated response times are verified by the vendor specifications or the worst case response time analysis.

7.1 LPP for Reactor Trip Figure 7.1-1 LPP Reactor Trip Function Notes 7.1.1. PPS Figure 7.1-2 Response Time Analysis for PPS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 23 Non-Proprietary Notes 7.2 HPP for Reactor Trip Figure 7.2-1 HPP Reactor Trip Function Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 24 Non-Proprietary 7.2.1. PPS Figure 7.2-2 Response Time Analysis for PPS Notes 7.3 LSGL for Reactor Trip TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 25 Non-Proprietary Figure 7.3-1 LSGL Reactor Trip Function Notes 7.3.1. PPS Figure 7.3-2 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 26 Non-Proprietary (1) + (2) + (3) + (4) + (5) + (6) + (7) = 642 ms 7.4 HSGL for Reactor Trip Figure 7.4-1 HSGL Reactor Trip Function Notes 7.4.1. PPS Figure 7.4-2 Response Time Analysis for PPS Notes TS TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 27 Non-Proprietary 7.5 LSGP FOR REACTOR TRIP Figure 7.5-1 LSGP Reactor Trip Function Notes 7.5.1. PPS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 28 Non-Proprietary Figure 7.5-2 Response Time Analysis for PPS Notes 7.6 HCP for Reactor Trip Figure 7.6-1 HCP Reactor Trip Function Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 29 Non-Proprietary 7.6.1. PPS Figure 7.6-2 Response Time Analysis for PPS Notes 7.7 LRCF for Reactor Trip TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 30 Non-Proprietary Figure 7.7-1 LRCF Reactor Trip Function Notes 7.7.1. PPS Figure 7.7-2 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 31 Non-Proprietary 7.8 HVOPT for Reactor Trip Figure 7.8-1 HVOPT Reactor Trip Function Notes 7.8.1. PPS Figure 7.8-2 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 32 Non-Proprietary 7.9 HLPL for Reactor Trip Figure 7.9-1 HLPL Reactor Trip Function Notes 7.9.1. PPS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 33 Non-Proprietary Figure 7.9-2 Response Time Analysis for PPS Notes 7.10 HLPD FOR REACTOR TRIP 7.10.1 ENFMS Detector TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 34 Non-Proprietary Figure 7.10-1 Response Time Analysis for ENFMS Detector Notes 7.10.1.1 CPCS Figure 7.10-2 Response Time Analysis for CPCS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 35 Non-Proprietary 7.10.1.2 PPS Figure 7.10-3 Response Time Analysis for PPS Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 36 Non-Proprietary 7.10.2 CEA Positions Figure 7.10-4 Response Time Analysis for CEA Positions Notes 7.10.2.1. CPCS Figure 7.10-5 Response Time Analysis for CPCS Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 37 Non-Proprietary 7.10.2.2 PPS Figure 7.10-6 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 38 Non-Proprietary 7.10.3 CEAC Penalty Factor Figure 7.10-7 Response Time Analysis for CEAC Penalty Factor Notes 7.10.3.1 CPCS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 39 Non-Proprietary Figure 7.10-8 Response Time Analysis for CPCS Notes 7.10.3.2. PPS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 40 Non-Proprietary Figure 7.10-9 Response Time Analysis for PPS Notes 7.11 LDNBR FOR REACTOR TRIP 7.11.1 ENFMS Detectors TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 41 Non-Proprietary Figure 7.11-1 Response Time Analysis for ENFMS Detector Notes 7.11.1.1. CPCS Figure 7.11-2 Response Time Analysis for CPCS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 42 Non-Proprietary 7.11.1.2 PPS Figure 7.11-3 Response Time Analysis for PPS Notes 7.11.2 CEA Positions TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 43 Non-Proprietary Figure 7.11-4 Response Time Analysis for CEA Positions Notes 7.11.2.1 CPCS Figure 7.11-5 Response Time Analysis for CPCS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 44 Non-Proprietary 7.11.2.2 PPS Figure 7.11-6 Response Time Analysis for PPS Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 45 Non-Proprietary 7.11.3 Cold Leg Temperature Figure 7.11-7 Response Time Analysis for Cold Leg Temperature Notes 7.11.3.1 CPCS Figure 7.11-8 Response Time Analysis for CPCS Notes TS TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 46 Non-Proprietary 7.11.3.2 PPS Figure 7.11-9 Response Time Analysis for PPS Notes 7.11.4 Hot Leg Temperature TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 47 Non-Proprietary Figure 7.11-10 Response Time Analysis for Hot Leg Temperature Notes 7.11.4.1 CPCS Figure 7.11-11 Response Time Analysis for CPCS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 48 Non-Proprietary 7.11.4.2 PPS Figure 7.11-12 Response Time Analysis for PPS Notes 7.11.5 Primary Coolant Pump Shaft Speed TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 49 Non-Proprietary Figure 7.11-13 Response Time Analysis for Primary Coolant Pump Shaft Speed Notes 7.11.5.1. CPCS Figure 7.11-14 Response Time Analysis for CPCS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 50 Non-Proprietary 7.11.5.2 PPS Figure 7.11-15 Response Time Analysis for PPS Notes 7.11.6 Reactor Coolant Pressure from Pressurizer TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 51 Non-Proprietary Figure 7.11-16 Response Time Analysis for Reactor Coolant Pressure Notes 7.11.6.1 CPCS Figure 7.11-17 Response Time Analysis for CPCS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 52 Non-Proprietary 7.11.6.2 PPS Figure 7.11-18 Response Time Analysis for PPS Notes 7.11.7 CEAC Penalty Factor TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 53 Non-Proprietary Figure 7.11-19 Response Time Analysis for CEAC Penalty Factor Notes 7.11.7.1 CPCS Figure 7.11-20 Response Time Analysis for CPCS Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 54 Non-Proprietary 7.11.7.2. PPS Figure 7.11-21 Response Time Analysis for PPS Notes 7.12 LPP FOR ESF ACTUATION TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 55 Non-Proprietary 7.12.1 Safety Injection Figure 7.12-1 Response Time Analysis for Safety Injection Notes 7.12.1.1 PPS Figure 7.12-2 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 56 Non-Proprietary 7.12.1.2 ESF-CCS Figure 7.12-3 Response Time Analysis for ESF-CCS Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 57 Non-Proprietary 7.12.2 Containment Isolation 7.12.2.1. CIAS actuated low volume purge valves Figure 7.12-4 Response Time Analysis for CIAS actuated low volume purge valves Notes 7.12.2.1.1. PPS Figure 7.12-5 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 58 Non-Proprietary 7.12.2.1.2. ESF-CCS Figure 7.12-6 Response Time Analysis for ESF-CCS Notes 7.12.2.2. Other CIAS actuated Valves TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 59 Non-Proprietary Figure 7.12-7 Response Time Analysis for Other CIAS actuated Valves Notes 7.12.2.2.1 PPS Figure 7.12-8 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 60 Non-Proprietary 7.12.2.2.2 ESF-CCS Figure 7.12-9 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 61 Non-Proprietary Figure 7.12-10 Response Time Analysis for ESF-CCS when offsite power is available Notes 7.13 HCP for ESF Actuation 7.13.1 Safety Injection TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 62 Non-Proprietary Figure 7.13-1 Response Time Analysis for Safety Injection Notes 7.13.1.1 PPS Figure 7.13-2 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 63 Non-Proprietary 7.13.1.2 ESF-CCS Figure 7.13-3 Response Time Analysis for ESF-CCS Notes TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 64 Non-Proprietary 7.13.2 Containment Isolation 7.13.2.1 CIAS actuated low volume purge valves Figure 7.13-4 Response Time Analysis for CIAS actuated low volume purge valves Notes 7.13.2.1.1 PPS Figure 7.13-5 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 65 Non-Proprietary 7.13.2.1.2 ESF-CCS Figure 7.13-6 Response Time Analysis for ESF-CCS Notes 7.13.2.2 Other CIAS actuated valves TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 66 Non-Proprietary Figure 7.13-7 Response Time Analysis for Other CIAS actuated valves Notes 7.13.2.2.1 PPS Figure 7.13-8 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 67 Non-Proprietary 7.13.2.2.2 ESF-CCS Figure 7.13-9 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 68 Non-Proprietary Figure 7.13-10 Response Time Analysis for ESF-CCS when offsite power is available Notes 7.13.3 Main Steam Isolation 7.13.3.1 MSIS actuated MSIVs Figure 7.13-11 Response Time Analysis for MSIS actuated MSIVs TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 69 Non-Proprietary Notes 7.13.3.1.1 PPS Figure 7.13-12 Response Time Analysis for PPS Notes 7.13.3.1.2 ESF-CCS Figure 7.13-13 Response Time Analysis for ESF-CCS Notes TS TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 70 Non-Proprietary 7.13.3.2 MSIS actuated MFIVs Figure 7.13-14 Response Time Analysis for MSIS actuated MFIVs Notes 7.13.3.2.1 PPS Figure 7.13-15 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 71 Non-Proprietary 7.13.3.2.2 ESF-CCS Figure 7.13-16 Response Time Analysis for ESF-CCS Notes 7.14 HHCP for ESF Actuation 7.14.1 Containment spray pump TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 72 Non-Proprietary Figure 7.14-1 Response Time Analysis for Containment Spray Pump Notes 7.14.1.1. PPS Figure 7.14-2 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 73 Non-Proprietary 7.14.1.2 ESF-CCS Figure 7.14-3 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 74 Non-Proprietary Figure 7.14-4 Response Time Analysis for ESF-CCS when offsite power is available Notes TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 75 Non-Proprietary 7.14.2 Containment isolation valves closed on CSAS Figure 7.14-5 Response Time Analysis for Containment isolation valves closed on CSAS Notes 7.14.2.1. PPS Figure 7.14-6 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 76 Non-Proprietary 7.14.2.2 ESF-CCS Figure 7.14-7 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 77 Non-Proprietary Figure 7.14-8 Response Time Analysis for ESF-CCS when offsite power is available Notes 7.15 LSGP for ESF Actuation 7.15.1 Main Steam Isolation 7.15.1.1 MSIS actuated MSIVs TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 78 Non-Proprietary Figure 7.15-1 Response Time Analysis for MSIS actuated MSIVs Notes 7.15.1.1.1 PPS Figure 7.15-2 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 79 Non-Proprietary 7.15.1.1.2. ESF-CCS Figure 7.15-3 Response Time Analysis for ESF-CCS Notes 7.15.1.2 MSIS actuated MFIVs TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 80 Non-Proprietary Figure 7.15-4 Response Time Analysis for MSIS actuated MFIVs Notes

1. Transmitter response time of 0.2 s will be confirmed by vendor specification.
2. APC-S response time of 0.05 s will be confirmed by vendor specification.
3. The PPS and ESF-CCS worst case response times are analyzed in following subsections.
4. Valve response time of 4.5 s will be confirmed by vendor specification.

7.15.1.2.1 PPS Figure 7.15-5 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 81 Non-Proprietary 7.15.1.2.2. ESF-CCS Figure 7.15-6 Response Time Analysis for ESF-CCS Notes 7.16 LSGL FOR ESF-ACTUATION 7.16.1 Auxiliary Feedwater Pump (motor driven)

TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 82 Non-Proprietary Figure 7.16-1 Response Time Analysis for Auxiliary Feedwater Pump (motor driven)

Notes 7.16.1.1. PPS Figure 7.16-2 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 83 Non-Proprietary 7.16.1.2 ESF-CCS Figure 7.16-3 Response Time Analysis for ESF-CCS when loss of offsite power Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 84 Non-Proprietary 7.16.2 Auxiliary Feedwater Pump (turbine driven)

Figure 7.16-4 Response Time Analysis for Auxiliary Feedwater Pump (turbine driven)

Notes 7.16.2.1 PPS Figure 7.16-5 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 85 Non-Proprietary 7.16.2.2 Auxiliary feedwater pump (turbine driven)

Figure 7.16-6 Response Time Analysis for ESF-CCS Notes 7.17 HSGL FOR ESF-ACTUATION TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 86 Non-Proprietary 7.17.1 Main Steam Isolation 7.17.1.1 MSIS actuated MSIVs Figure 7.17-1 Response Time Analysis for MSIS actuated MSIVs Notes 7.17.1.1.1 PPS Figure 7.17-2 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 87 Non-Proprietary 7.17.1.1.2 ESF-CCS Figure 7.17-3 Response Time Analysis for ESF-CCS Notes 7.17.1.2 MSIS actuated MFIVs TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 88 Non-Proprietary Figure 7.17-4 Response Time Analysis for MSIS actuated MFIVs Notes 7.17.1.2.1 PPS Figure 7.17-5 Response Time Analysis for PPS Notes TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 89 Non-Proprietary 7.17.1.2.2 ESF-CCS Figure 7.17-6 Response Time Analysis for ESF-CCS Notes 7.18 CREVAS 7.18.1 Control room air intake radiation - High 7.18.1.1 CREVAS actuated isolation dampers TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 90 Non-Proprietary Figure 7.18-1 Response Time Analysis for CREVAS actuated isolation dampers Notes 7.18.1.1.1 RMS Figure 7.18-2 Response Time Analysis for RMS Note 7.18.1.1.2 ESF-CCS TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 91 Non-Proprietary Figure 7.18-3 Response Time Analysis for ESF-CCS Notes 7.18.1.2 Emergency makeup ACU fan Figure 7.18-4 Response Time Analysis for Emergency makeup ACU fan Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 92 Non-Proprietary 7.18.1.2.1 RMS Figure 7.18-5 Response Time Analysis for RMS Note 7.18.1.2.2 ESF-CCS Figure 7.18-6 Response Time Analysis for ESF-CCS Notes TS TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 93 Non-Proprietary 7.19 FHEVAS 7.19.1 Spent fuel pool area radiation - High 7.19.1.1 FHEVAS actuated isolation dampers Figure 7.19-1 Response Time Analysis for FHEVAS actuated isolation dampers Notes 7.19.1.1.1 RMS Figure 7.19-2 Response Time Analysis for RMS Note 7.19.1.1.2 ESF-CCS TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 94 Non-Proprietary Figure 7.19-3 Response Time Analysis for ESF-CCS Notes 7.19.1.2 Emergency makeup ACU fan Figure 7.19-4 Response Time Analysis for Emergency ACU fan Notes TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 95 Non-Proprietary 7.19.1.2.1 RMS Figure 7.19-5 Response Time Analysis for RMS Note 7.19.1.2.2 ESF-CCS Figure 7.19-6 Response Time Analysis for ESF-CCS Notes TS TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 96 Non-Proprietary 7.20 CPIAS 7.20.1 Containment upper operating area / operating area radiation - High 7.20.1.1 CPIAS actuated isolation valves Figure 7.20-1 Response Time Analysis for CPIAS actuated isolation valves Notes 7.20.1.1.1 RMS Figure 7.20-2 Response Time Analysis for RMS Note 7.20.1.1.2 ESF-CCS TS TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 97 Non-Proprietary Figure 7.20-3 Response Time Analysis for ESF-CCS Notes TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 98 Non-Proprietary 7.21 SIGNAL PATH OF THE ESF-CCS Table 7.21-1 Signal Path for each ESF-CCS Response Time TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 99 Non-Proprietary Table 7.21-1 Signal Path for each ESF-CCS Response Time (Continued) 7.21.1 Signal Path Case 1 TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 100 Non-Proprietary 7.21.2 Signal Path Case 2 7.21.3 Signal Path Case 3 TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 101 Non-Proprietary 7.21.4 Signal Path Case 4 7.21.5 Signal Path Case 5 TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 102 Non-Proprietary 7.21.6 Signal Path Case 6 7.21.7 Signal Path Case 7 7.21.8 Signal Path Case 8 TS TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 103 Non-Proprietary TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 104 Non-Proprietary 8

REFERENCES

[1] DCD for the APR1400.

[2] APR1400-Z-J-NR-14001-P, Safety I&C System, Rev. 2, January 2018.

[3] APR1400-Z-J-NR-14005-P, Setpoint Methodology for Safety-Related Instrumentation, Rev. 2, January 2018.

[4] WCAP-16097-P-A, Common Qualified Platform Topical Report, Rev. 3, February 2013.

[5] APR1400-A-J-NR-14004-P(WCAP-17922-P), Common Q Platform Supplemental Information in Support of the APR1400 Design Certification, Rev. 2, May 2017.

[6] BTP 7-21, Guidance on Digital Computer Real-Time Performance, Rev. 5, March 2007.

[7] BTP 7-14, Guidance on Software Reviews for Digital Computer-based Instrumentation and Control Systems, Rev. 5, March 2007.

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP 105 Non-Proprietary 9

DEFINITIONS RT Response Time Time interval from when the monitored parameter exceeds the trip setpoint value at the input to the sensor until electrical power is interrupted to the CEA drive mechanism through the actuation of the RTSS.

ESF Actuation Response Time Time interval from when the monitored parameter exceeds the trip setpoint value at the input to the sensor until the final actuator for the final plant component, such as the motor starter for a pump, valve, damper or fan, repositions to energize or de-energize that plant component.

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP A1 Non-Proprietary APPENDIX A CONFORMANCE TO BTP 7-21 A.1. LIMITING RESPONSE TIMES A.1.1 Acceptance Criteria Limiting response times should be shown to be consistent with safety requirements (e.g., suppress power oscillations, prevent fuel design limits from being exceeded, prevent a non-coolable core geometry).

Setpoint analyses and limiting response times should also be shown to be consistent. The reviewer should verify that limiting response times are acceptable to the organizations responsible for reactor systems, electrical systems, and plant systems before accepting the limiting response times as a basis for timing requirements.

A.1.2 Conformance A.2. DIGITAL COMPUTER TIMING REQUIREMENTS A.2.1 Acceptance Criteria Digital computer timing should be shown to be consistent with the limiting response times and characteristics of the computer hardware, software, and data communications systems. Computer system timing requirements that should be addressed in software requirements specifications are described in standard review plan (SRP) BTP 7-14(Reference 7).

A.2.2 Conformance TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP A2 Non-Proprietary A.3. ARCHITECTURE A.3.1 Acceptance Criteria The level of detail in the architectural description should be sufficient that the Staff can determine the number of message delays and computational delays interposed between the sensor and the actuator.

An allocation of time delays to elements of the system and software architecture should be available. In initial design phases (e.g., at the point of design certification application), an estimated allocation of time delays to elements of the proposed architecture should be available. Subsequent detailed design and implementation should develop refined timing allocations down to unit levels in the software architecture.

A design should be feasible with currently known methods and representative equipment. Design timing feasibility may be demonstrated by allocating a timing budget to components of the system architecture so that the entire system meets its timing requirements. See NUREG/CR-6083, Sections 2.2, 2.3.1, and 2.3.2, and NUREG/CR-6082. The timing budget should include internal and external communication delays, with adequate margins.

Any non-deterministic delays should be noted and a basis provided that such delays are not part of any safety functions, nor can the delays impede any protective action.

Software architectural timing requirements should be addressed in a software architectural description as described in SRP BTP 7-14. Databases, disk drives, printers, or other equipment or architectural elements subject to halting or failure should not be able to impede protective system action.

A.3.2 Conformance TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP A3 Non-Proprietary A.4. DESIGN COMMITMENTS A.4.1 Acceptance Criteria Design basis documents should describe system timing goals.

Timing requirements should be satisfied by design commitments.

A design should consider data rates, data bandwidths, and data precision requirements for normal and off-normal operation, including the impact of environmental extremes. There should be sufficient excess capacity margins to accommodate likely future increases in demands or software or hardware changes to equipment.

Design basis documents should identify design practices that the applicant/licensee will use to avoid timing problems. Risky design practices such as non-deterministic data communications, non-deterministic computation, use of interrupts, multitasking, dynamic scheduling, and event-driven design should be avoided. When such practices are allowed, the applicant/licensee should describe methods for control of the associated risk. NUREG/CR-6082 and NUREG/CR-6083 describe risky design practices in more detail.

A.4.2 Conformance TS TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP A4 Non-Proprietary A.5. PERFORMANCE VERIFICATION A.5.1 Acceptance Criteria The means proposed, or used, for verifying a system's timing should be consistent with the design.

Testing and/or analytic justification should show that the system meets limiting response times for a reasonable, randomly selected subset of system loads, conditions, and design basis events. The subset should include some limiting load conditions and be chosen by persons independent of the persons who designed the system.

Both analytical and test techniques of timing analysis have drawbacks. It is difficult to demonstrate completeness of timing tests. Completeness is easier to demonstrate for analyses, but analyses predict extreme times that are not actually possible. Therefore, analysis and testing are often combined in a complementary manner to confirm that a system can meet the limiting response times.

Measurement methods should be appropriate to the resolution and detail required.

Timing measurements should meet projections or the anomalies should be satisfactorily explained (NUREG/CR-6083, Sections 2.1, 2.3.3, and 2.3.4).

A.5.2 Conformance A.6. USE OF CYCLIC REAL-TIME EXECUTIVE A.6.1 Acceptance Criteria In systems that include a cyclic real-time executive (operating system), a typical cycle includes application modules, diagnostic modules, and other support modules. A watch-dog timer is normally set at the beginning of each cycle and reset at the end. If the cycle is not completed before the watch-dog timer period is complete, an error is generated.

TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP A5 Non-Proprietary A basis should be provided that describes the cycle and demonstrates that the watch-dog timer is correctly implemented, the time required for the application modules does not exceed the allotted time given in the architecture timing budget, and diagnostic and other support modules will not cause the allotted time to be exceeded.

Examples of solutions acceptable to the Staff may be found in the Safety Evaluation Reports for the Palo Verde Nuclear Generating Station, Units 1, 2, and 3, "Issuance of Amendments on the Core Protection Calculator System Upgrade," dated October 24, 2003, and the Siemens Power Corporation, Topical Report EMF-2110(NP), "Teleperm XS: A Digital Reactor Protection System," dated May 5, 2000.

A.6.2 Conformance A.7. USE OF PART-SCALE PROTOTYPES A.7.1 Acceptance Criteria In systems that have not been implemented and tested on a full scale, expected system delays on scale-up should be calculated and shown to be less than limiting system response times (NUREG/CR-6083, Sections 2.1.3 and 2.1.4).

A basis should be provided that describes the effects of adding sensors, divisions, communication links, controllers, computer nodes, or actuation devices required to scale the test system to full scale.

Test data should confirm scaling as well as performance projections. Exceptions are considered anomalies or abnormal events.

Prototypes designed to demonstrate scaling should include all significant architectural elements plus enough additional elements to show the scaling effects to be measured.

TS

Response Time Analysis of Safety I&C System APR1400-Z-J-NR-14013-NP, Rev.2 KEPCO & KHNP A6 Non-Proprietary A.7.2 Conformance TS

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