GO2-92-183, Responds to NRC 920626 Supplemental SER Re Station Blackout Analysis,Per 10CFR50.63(c)(4).Procedure Mod Re Containment Isolation Will Be Completed by 920930
| ML17289A770 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 07/31/1992 |
| From: | Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GO2-92-183, TAC-M68626, NUDOCS 9208070029 | |
| Download: ML17289A770 (5) | |
Text
ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM REGULATII INFORMATION DZSTRZBUTIOlYSTEM (RIDE)
ACCE$ 91ON NBR:9208070029 DOC.DATE: 92/07/31 NOTARIZED:
NO FACI~z".'40-397 WPPSS Nuclear Project, Unit 2, Washington Public Powe AUTH.NAME AUTHOR AFFILIATION SORENSEN,G.C.
Washington Public Power Supply System RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
DOCKET 05000397
SUBJECT:
Responds to NRC 920626 supplemental SER re station blackout analysis,per 10CFR50.63(c)(4).Procedure mod re containment isolation will be completed by 920930.
DISTRIBUTION CODE:
AOSOD COPIES RECEIVED:LTR 2 ENCL C7 SIZE:
TITLE: OR Submittal: Station Blackout (USI A-44) 10CFR50.63, MPA A-22 NOTES:
RECIPIENT ID CODE/NAME PD5 PD INTERNAL: ACRS NRR PD2-4PM TAM NRR/DST/SELB NRR/DST/SRXB8E EXTERNAL: NRC PDR COPIES LTTR ENCL RECIPIENT ID CODE/NAME DEANYW.
AEOD/DSP/TPAB NRR/DET/ESGB 8D NRR DST SPLB8D1 FILE 0
NSIC COPIES LTTR ENCL NOTE TO ALL"RIDS" RECIPIENTS'LEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAMEFROM DISTRIBUTION LINIS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 17 ENCL ~V
WASHINGTONPUBLIC POWER SUPPLY SYSTEM P.O. Box 96'8 ~ 3000 George Washtrtgtort Way Rtchlartd, Washtrtgtort 993524968
~ (509) 372-5000 July 31, 1992 G02-92-183 Docket No. 50-397 U.S. Nuclear Regulatory Commission Attn:
Document Control Desk Washington, D.C.
20555
Subject:
WNP-2, OPERATING LICENSE NPF-21 STATION BLACKOUT SUPPLEHENTAL SER AND IHPLEHENTATION SCHEDULE, 10CFR50.63(c)(4),
TAC NO. H68626
References:
1)
Letter dated June 26,
"Supplemental Safety Evaluation (SSE) of the Washington Public Power Supply System Nuclear Project No.
2 (WNP-2) Station Blackout Analysis (TAC H68626)"
2)
Letter G02-92-057, dated Harch 6,
- 1992, GC Sorensen (SS) to
- NRC, "Safety Evaluation of the WPPSS Nuclear Project No.
2 Station Blackout Analysis" 3)
Letter G02-92-121, dated Hay 14,
- 1992, GC Sorensen (SS) to
- NRC, "Safety Evaluation of the WPPSS Nuclear Project No.
2 Station Blackout Analysis" The subject regulation requires that within 30 days of notification of NRC's conclusion regarding the adequacy of the licensee's SBO submittal, a schedule be provided by the licensee for implementing any equipment and associated procedure modifications necessary to meet the requirements of the rule.
By Reference 1 the NRC provided this notification for WNP-2.
In Reference 2 we informed the NRC that there were no modifications required to implement the SBO Rule for WNP-2.
This situation has not changed; thus we have no schedule to provide relative to implementing equipment and associated procedure modifications.
We do have one procedure modification remaining to be accomplished relative to providing for the containment isolation discussed in Reference 3.
This will be achieved by September 30, 1992.
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~~ IP Page Two H'ATION BLACKOUT SUPPLEHENTAL SER AND IHPLEHENTATION SCHEDULE, 10CFR50.63(c)(4),
=TAG NO. H68626 Three clarifications of the Reference 1
SSER are required:
Section 2.4 states that closure of FPC-V-153 and 149 "... will be included in a procedure to establish containment isolation during an SBO event."
In Reference 3
we stated that closure of these two valves would be provided if necessary.
By NUHARC 87-00, Appendix I, guestion
Response
- 102, the procedure will provide for confirmation that the valves are closed if core damage is imminent.
2.
3.
Section 2.3.4 mentions the potential need to provide for closure of HS-V-19.
In Reference 3 >>e stated that HS-V-19 would.be removed from the valve closure list as it is procedurally controlled to be closed during normal operation.
Section 2.4 of the SSER does reflect this position, Section 2.7 states that "...SBO coping equipment is identified as guality Class (gC) I or guality Class II+ except the piping and structure (passive equipment) supports associated with Condensate Storage Tanks (CSTs)."
In Reference 2 we stated that "...with the exception of the CST we have not identified other passive equipment (e.g., piping and structural supports) as SBO equipment as this would add no value to the ability to cope with a SBO."
The Supply System appreciates the effort that was made by the NRC reviewer in incorporating the Reference 3 response which we realize was received by the NRC late in preparation of the SSER.
This was of significant assistance to the Supply System in the preparation of the documentation necessary to support the SBO rule implementation.
Sincerely, G.
C.
S
- ensen, Hanager Regulatory Programs (Hail Drop 280)
AGH/bk cc:
JB Hartin -
NRC RV NS Reynolds
- Winston
& Strawn RR Assa-NRC DL Williams - BPA/399 NRC Site Inspector
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