LR-N15-0130, Pre-Submittal Meeting: License Amendment Request Modifying Chilled Water Syetems Requirements
| ML15168A550 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 06/17/2015 |
| From: | Duke P Public Service Enterprise Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| LR-N15-0130 | |
| Download: ML15168A550 (16) | |
Text
PSEG Nuclear LLC P.O. Box 236, Hancocks Bridge, NJ 08038-0236 JUN 1.7 20*15 LR-N15-0130 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Salem Nuclear Generating Station Units 1 and 2 Renewed Facility Operating License Nos. DPR-70 and 75 NRC Docket Nos. 50-272 and 50-311 PSEG Nuclear LLC 10 CFR 50.90
Subject:
Pre-Submittal Meeting: License Amendment Request Modifying Chilled Water System Requirements PSEG Nuclear LLC (PSEG) intends to submit a License Amendment Request (LAR) to modify the Salem Units 1 and 2 Technical Specifications associated with the Chilled Water System. A pre-submittal meeting was requested and has been scheduled for June 24, 2015 (ADAMS Accession No. ML15159A790). Enclosure 1 provides the presentation material for the June 24, 2015 meeting.
There are no regulatory commitments contained in this letter. If you have any questions or require additional information, please contact Mr. Brian Thomas at (856) 339-2022.
Sincerely, G a.S t_Q
____ __p Paul R. Duke, Jr.
\\
Manager - Licensing -
Salem Unit 1 and 2 Presentation for June 24, 2015 Pre-Submittal Meeting for License Amendment Request Modifying Chilled Water System Requirements
JUN 17 2015 Page' 2 LR-N15-0130 cc:
Mr. D. Dorman, Administrator, Region I, NRC Ms. C. Parker, Project Manager, NRC, Project Manager, NRC NRC Senior Resident Inspector, Salem Mr. P. Mulligan, Chief, NJBNE Mr. L. Marabella, Corporate Commitment Tracking Coordinator Mr. T. Cachaza, Salem Commitment Tracking Coordinator 10 CFR 50.90 LRvN15-0130 Salem Unit 1 and 2 Presentation for June 24, 2015 Pre-Submittal Meeting for License Amendment Request Modifying Chilled Water System Requirements
Overview of Proposed Change
Background
System Overview Proposed Technical Specification Changes Justification Summary 2
Technical Specification (TS) change needed to support upgrade of Auxiliary Building (AB) Chilled Water (CH) system and to allow maintenance on common CH components Changes are being proposed to the "Chilled Water System - Auxiliary Building Subsystem" TS and "Control Room Emergency Air Conditioning System (CREACS)" TS 3
Proposed changes to Chilled Water TS would result in three LCO configurations each with their own applicability requirements and related Actions and Surveillances Justification identifies required operating restrictions and parameters for the two new LCO configurations 4
The Salem AB CH System is classified as Safety Related and supplies cooling to the Control, Electrical Equipment and Relay Rooms, and other safety and non-safety related equipment. The AB CH system has three chillers and two pumps in each unit The Salem Control Area Ventilation system is a shared system cooled by AB CH. Each Unit provides one train of the two train ventilation system Both Unit's CH systems are currently necessary to support maintaining both CREACS trains operable even when a Unit is in an outage 5
The Salem Chillers currently utilize HCFC-22 (R-22) as their refrigerant.
R-22 will be phased out (Title VI of the Clean Air Act)
In addition to the refrigerant issue, several chiller components are nearing the end of their service life and are requiring increased maintenance Replacing the existing chillers with new chiller units in the same location was determined to be best solution 6
The AB CH system was added to TS in 1997 by Amendments 199 and 182 to comply with the requirements of 10 CFR 50.36(c)(2)
Amendments 199 and 182 did not address crosstie operation; this subsequently resulted in maintenance and operational challenges Portions of AB CH piping cannot be taken out of service for maintenance without complete shutdown of the AB CH System; the system is required to be operable in all Modes 7
- Chilled Water Major Components
Two Chillers
Three Chilled Water Pumps
- Chilled Water System Loads
Control Room Emergency Air Conditioning Coil
Control Area Air Conditioning Coil
Emergency Control Air Compressor (ECAC)
Penetration Area Cooling Units
Unit 2-Lab Coolers, Count Room Cooler, PASS Room Cooler 8
A 3 tier TS 3.7.10 LCO is being proposed:
(x#)*tih,ijt)l:+,:-ti**,
BOTHCRJ::;A Strai11San (lpgrable*
- *. P*§'rTs3:'?::6:1Jsingre. filtration
,-.f/i012i:+3df4il:5!es:
are OPEN 9
Action Statements and Surveillances would support each LCO:
Action Statements Action Statements insert the phrase 'of the required chillers' Existing Action Statements would be modified with Notes applicable to new LCOs (b) and (c) to minimize repeating Action Statements for each of the new LCO configurations.
Notes provide clear direction on implementation of the Actions depending on the LCO configuration Notes provide direction on transition from one LCO to another Surveillance Requirements New Surveillance Requirements are added for the LCO (b) and (c) configurations to verify entry requirements continue to be met once every 24-hours while in the LCO (b) and (c) configurations.
TS 3.7.6.1 (U1) and 3.7.6 (U2) also would be revised reflecting the CREACS single filtration train alignment restrictions 10
The supporting calculations assume single failure or a chiller out of-service:
e Restrictions ensure required cooling capability On a loss of a required chiller, a 14 day Action statement is entered until the chiller is restored. This is similar to the existing TS which permits a 14 day AOT to restore a single inoperable chiller One chiller remaining in each unit can support continued operation On loss of a chilled water pump, a 7 -day Actions Statement is entered until the pump is restored. This is similar to the existing TS action for a single inoperable chilled water pump.
New SR to verify operating restrictions every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> CREACS single train alignment is permitted if the Unit supplying the single train is in LCO 3. 7.10.a 1 1
The supporting calculations assume that one of three chillers is unavailable due to either a single failure or a chiller out-of-service Restrictions ensure required cooling capability The three chillers and two chilled water pumps are provided from one Unit (the other Unit has no operable chillers or chilled water pumps)
On loss of a required chiller, a 14 day Action Statement is entered on both units until the chiller is restored. This is similar to the existing TS which permits a 14 day AOT to restore a single inoperable chiller Two chillers can support continued operation of both Units On loss of a chilled water pump, a 7 -day Action Statement is entered on both units until the pump is restored. This is similar to the existing TS.
New SR to verify operating restrictions every 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> C'REACS single train alignment is not permitted GDC 5 addressed for Unit Cross-tie 12
- Single failure assumption fundamental to analysis
- TS restrictions ensure Chilled Water system can support new LCOs Seasonal restrictions provide margin Removal of non-essential loads provide additional safety-related cooling capacity
- LCO Actions consistent with current TS
- New surveillance added to verify restrictions during new LCOs
- GDC 5 addressed for Unit Cross-tie The sharing of the AB CH system between Units does not impair its ability to perform its safety function Existing plant design includes cross-tie (no system modification required)
- Proposed amendment presents no significant hazards consideration under the standards set forth in 10CFR50.92 (c)
- Amendment implementation will allow for system upgrade and reduction in system maintenance 13