ML19162A417
| ML19162A417 | |
| Person / Time | |
|---|---|
| Issue date: | 06/13/2019 |
| From: | Nick Melly NRC/RES/DRA |
| To: | |
| T. Rivera | |
| Shared Package | |
| ML19162A411 | List: |
| References | |
| Download: ML19162A417 (16) | |
Text
NUREG/CR-6850 FIRE PRA METHODOLOGY Module 1 Internal Event, At-Power Probabilistic Risk Assessment Model for SNPP Sample Plant Description Nicholas Melly - Nuclear Regulatory Commission Fire PRA Workshop June 24, 2019 - June 28, 2019 Rockville, MD U.S. NRC HQ
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 2 Sample Problems / Sample Plant Fire PRA module will involve hands-on exercises Intent: To illustrate key aspects of the methodology through a cohesive set of sample problems All exercises are built around a common sample plant - the Simple Nuclear Power Plant (SNPP)
The exercises are designed such that taking all modules together presents a fairly complete picture of the FPRA methodology Not every task is covered by the SNPP sample problems Not every aspect of covered tasks are illustrated
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 3 The SNPP: Intent and Approach The SNPP is not intended to reflect either regulatory compliance or good engineering practice It is purely an imaginary construct intended to highlight key aspects of the methodology - Nothing more!
The SNPP has been kept as simple as possible while still serving the needs of the training modules Aspects of the plant are assumed for purposes of the training exercises, e.g.,:
BOP equipment not covered in detail Some systems are assumed to remain available
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 4 The SNPP: Plant Characteristics PWR with one primary coolant loop One steam generator, one RCP, one pressurizer Chemical volume control/high-pressure injection system Residual heat removal system Secondary side includes:
Main steam and feedwater loop for the single steam generator (not modeled)
Multiple train auxiliary feedwater system to provide decay heat removal Support systems includes:
CCW (not modeled)
Instrument air AC and DC power Instrumentation See Chapter 2 for complete plant description
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 5 The SNPP: Primary Systems P&ID HPI-A HPI-B MOV-1 MOV-9 RHR HEAT EXCHANGER CV-3 CV-4 LETDOWN HEAT EXCHANGER FO MOV-5 MOV-6 CV-2 MOV-2 OPERATED VIA SOV-2 (AIR)
TI-1 FC CCW CCW LI-2 LI-1 SKID MOUNTED AIR COMPRESSOR AIR SUPPLY VCT PZR MOV-13 FC OPERATED VIA SOV-1 WITH N2 BACKED BY AIR AOV-1 (PORV)
PT-1 SG RV MOV-7 MOV-3 MOV-4 MOV-20 LI-3 LI-4 AOV-3 OPERATED VIA SOV (AIR)
5/23/12 A-10 Revision No.:
Date:
Drawing No.:
PRIMARY SYSTEM P & I D SNPP RCP-1
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 6 SG MOV-14 MOV-15 MOV-11 MOV-10 MOV-18 MOV-19 MOV-16 MOV-17 MSIV CST AFW-B (STEAM)
AFW-A AFW-C (DIESEL DRIVEN)
V-11 L.O.
GOVERNOR FROM FEEDWATER TO TURBINE CONDENSER ATOMOSPHERE RELIEF VALVE AOV-4 A-1 STEAM TURBINE 2
5/23/12 A-11 Revision No.:
Date:
Drawing No.:
SECONDARY SYSTEM P & I D SNPP LI-6 LI-5 FC The SNPP: Secondary Systems P&ID
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 7 SWGR-1 RCP-1 UAT-1 SWGR-2 Spare COMP-1 SST-1 LC-1 MCC-1 SST-2 LC-2 MCC-2 BC-1 SWGR-A AFW-A HPI-A SUT-1 SST-A LC-A SWGR-B RHR-B HPI-B SST-B LC-B ATS-1 EDG-A EDG-B G
MCC-A1 BC-A MOV-1 MOV-3 MOV-5 MOV-7 MOV-10 MOV-13 MOV-16 (Racked Out)
BC-B MCC-B1 MOV-2 MOV-4 MOV-6 MOV-8 MOV-9 MOV-17 MOV-20 MOV-19 MOV-18 DC BUS-A VITAL-A TI-1 SOV-1 LI-5 LI-3 ANN-1 INV-A BAT-A DC BUS-B VITAL-B LI-2 LI-4 PT-1 INV-B BAT-B SOV-3 SOV-2 SWGR-B SWGR-A EDG-A PNL-A PNL-B MOV-14 MOV-11 MOV-15 Vol Reg DC BUS-1 BAT-1 RCP-1 NON-VITAL DC LOADS SWYD OFF-SITE POWER 4
5/23/12 A-12 Revision No.:
Date:
Drawing No.:
ELECTRICAL ONE-LINE DIAGRAM SNPP LI-1 LI-6 EDG-B HPI-A AFW-A RHR-B HPI-B AOV-4 The SNPP: Electrical One-Line Diagram
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 8 The SNPP: General Plant Layout - Plan SECURITY BLDG.
AUX BLDG.
DG BLDG.
SWITCH YARD INTAKE STRUCTURE TURBINE BLDG.
CONTAINMENT RWST AA AA CST DG-B DG-A MAIN TRANSFORMER UAT SUT YARD 14 7
12 8B 8A 15 13 BATTERY ROOM 1 1
6/22/09 A-01 Revision No.:
Date:
Drawing No.:
PLANT LAYOUT GENERAL SNPP
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 9 The SNPP: Plant Layout - Elevation Containment and Auxiliary Building MAIN CONTROL ROOM CABLE SPREADING ROOM SWITCHGEAR ROOMS RHR PUMP ROOM CHARGING PUMP ROOM
+70 FT
+55 FT
+40 FT
+20 FT
+0 FT GRADE
-20 FT MOV-7 RCP-1 SOV-1 PRESSURIZER AOV-1 MOV-13 PLANT AIR N2 5
6 9 10 11 2
4A 4B 7
1 3
2 7/21/11 A-02 Revision No.:
Date:
Drawing No.:
PLANT LAYOUT SECTION AA SNPP
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 10 The SNPP: Auxiliary Building -
RHR Pump Room NOTES:
- 1. VERTICAL PIPE PENETRATION TO UPPER ELEVATION.
- 2. PENETRATION TO UPPER FLOOR IS SEALED.
UP MOV-3 MOV-4 RHR PUMP RHR HX VCBT 10 (NOTE 2)
HCBT 0 (NOTE 2)
HCBT: HORIZONTAL CABLE TRAY VCBT: VERTICAL CABLE TRAY MOV-8 NOTE 1 MOV-20 4B 4A MOV-10 MOV-11 MOV-15 MOV-14 AFW-A AFW-B 2
7/21/11 A-03 Revision No.:
Date:
Drawing No.:
AUX BLDG EL. - 20FT SNPP
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 11 The SNPP: Auxiliary Building -
Charging Pump Room NOTE:
- 1. VERTICAL PIPE PENETRATING THE FLOOR.
UP VCBT 0A VCBT: VERTICAL CABLE TRAY VCBT 0B MOV-1 MOV-9 AOV-3 HPI-A HPI-B MOV-6 MOV-5 NOTE 1 MOV-2 VCT AOV-2 RWST LETDOWN HX CV-3 CV-4 CV-2 1
6/22/09 A-04 Revision No.:
Date:
Drawing No.:
AUX BLDG EL. 0FT SNPP 2
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 12 The SNPP: Auxiliary Building -
Switchgear Rooms UP VCBT +20A VCBT +20B HCBT +35A HCBT: HORIZONTAL CABLE TRAY VCBT: VERTICAL CABLE TRAY HCBT +37A SWITCHGEAR ROOM A SWITCHGEAR ROOM B BATTERY ROOM A BATTERY ROOM B 120VAC-A MCC-A 120VAC-B MCC-B SST-A 4KV BUS-A 4KV BUS-B 120V DC-A 120V DC-B SST-B LC-A LC-B BC-A INV-A PNL-A BC-B INV-B PNL-B SWG ACCESS ROOM 6
5 7
10 11 9
HCBT +37A 1
6/22/09 A-05 Revision No.:
Date:
Drawing No.:
AUX BLDG EL. +20FT SNPP
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 13 The SNPP: Auxiliary Building -
Cable Spreading Room UP HCBT: HORIZONTAL CABLE TRAY VCBT: VERTICAL CABLE TRAY HCBT +50B VCBT +40B VCBT +40A HCBT +50A 3
1 6/22/09 A-06 Revision No.:
Date:
Drawing No.:
AUX BLDG EL. +40FT CABLE SPREADING ROOM SNPP
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 14 The SNPP: Auxiliary Building -
Main Control Room UP MAIN CONTROL ROOM KITCHEN MCB SHIFT SUPERVIS OR OFFICE CONTROL ROOM ACCESS 7
1 1
6/22/09 A-07 Revision No.:
Date:
Drawing No.:
AUX BLDG MAIN CONTROL ROOM SNPP
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 15 The SNPP: Turbine Building AOV-4 MOV-16 MOV-19 MOV-17 AFW-C (Diesel Driven)
V-12 CST HCBT +10A HCBT +10B 4KV BUS 1 4KV BUS 2 SST-1 LC-1 SST-2 LC-2 250V/DC BUS-1 BC-1 MCC-1 MCC-2 AIR COMPRESSOR 1 MOV-18 ATS BAT-1 BATTERY ROOM 15 12 1
1 6/22/09 A-08 Revision No.:
Date:
Drawing No.:
TURBINE BLDG EL. 0FT SNPP
Fire PRA Workshop 2019, Rockville, MD Module 1: Internal Event, At-Power PRA Model for SNPP Slide 16 The SNPP: Main Control Board Layout ELECTRICAL TURBINE AND MAIN FEED RX CONTROL PRESSURELZER CONTROL AUX.
CCW DG-A DG-B AOV-1 PT-1 MOV-13 MOV-14, MOV-15 MOV-17, MOV-16, MOV-19 AUX. FEEDWATER PUMP A, PUMP C MOV-11, MOV-10, MOV-18 SEE DETAIL BELOW LI-1 LI-2 TI-1 MOV-6 MOV-5 RHR PUMP LI-3 LI-4 MOV-4 MOV-3 MOV-9 MOV-1 AOV-3 PUMP HPI-B PUMP HPI-A MOV-2 AOV-2 MOV-8 MOV-7 DETAIL FROM ABOVE TURBINE MAIN FEED CB-6 CB-4 CB-2 CB-1 CB-3 CB-5 CB-7 AOV-4 MOV-20 1
6/22/09 A-09 Revision No.:
Date:
Drawing No.:
MAIN CONTROL ROOM MAIN CONTROL BOARD SNPP