ML17290A936
| ML17290A936 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 01/14/1994 |
| From: | Parrish J WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-88-20, NUDOCS 9401310226 | |
| Download: ML17290A936 (5) | |
Text
ACCELERATED DI UTION DEMONS ATION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:9401310226 DOC.DATE: 94/01/14 NOTARIZED:
NO DOCKET FACIL:50-397 WPPSS Nuclear Project, Unit 2, Washington Public Powe 05000397 AUTH.NAME AUTHOR AFFILIATXON PARRISH,J.V.
Washington Public Power Supply System RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
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SUBJECT:
Suggests that NRC delay review of facility IPE,submitted via util 920828 ltr,in response to Generic Ltr 88-20 until util update can be submitted. Util intends to submit update by 940528.
DISTRIBUTION CODE:
A011D COPIES RECEIVED:LTR ENCL SIZE:
TITLE: Generic Ltr 88-20 re Individual Plant Evaluations NOTES:
D RECIPIENT ID CODE/NAME PDV PD XNTERNAL: ACRS HOUSTON,M NRR/DORS/OEAB NRR/DRPE/PD1-4 NR /~S A SPSB EG FXL Ol RES/SAIB RGN 2
RGN 4
EXTERNAL: NRC PDR COPIES LTTR ENCL RECIPIENT XD CODE/NAME CLIFFORD,J AEOD/DSP/TPAB NRR/DORS/OTS B NRR/DRPW NRR/OGCB RES/DSXR/SAXB/B RGN 1 RGN 3
NSIC COPIES LTTR ENCL D
D R
D NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISIS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 27 ENCL ~ /0 D
D
WASHINGTON PUBLIC POWER SUPPLY SYSTEM P.O. Box 96'8 ~ 3000 George 1Pasbfrtgtort Way ~ Rfcblartd, 1tfrasbfrtgtort 99352-0968
~ (509) 372-5000 Oanuaiy 14, 1994 Docket No. 50-397 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station P1-137 Washington, D.C.
20555 Gentlemen:
Subject:
WNP-2 OPERATING LICENSE NPF-21, INDIVIDUAL PLANT EXAMINATION(IPE)
Reference:
Letter G02-92-206, dated August 28,
- 1992, GC Sorensen (SS) to NRC, "Response to Generic Letter 88-20" The reference transmitted the Supply System response to the request of Generic Letter 88-20 for an Individual Plant Examination (IPE) of WNP-2 for severe accident vulnerabilities.
Since the submittal of the WNP-2 IPE, the Supply System has had an on-going effort to identify areas, processes and methods which can best make use of the unique insights possible from use of Probabilistic Risk Assessments (PRAs) such as the WNP-2 IPE.
As part of this effort, the Supply System has recognized the need to bring the IPE models up-to-date with current plant configuration.
This is in recognition that the WNP-2 model was frozen as it existed in 1989 when work began on the IPE.
Based on comments received from consultants, some changes in the logic used within the models must be made to reduce overconservatisms and to better reflect plant response to given events.
While these changes will not significantly change the Core Damage Frequency (CDF) published in the IPE, it is likely that different sequences willbecome important in terms ofcontribution to CDF. The result ofthese changes would ultimately be seen in changes in relative importance of plant equipment.
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+e Page Two INDIVIDUALPLANT EXAMINATION(IPE)
For these reasons we suggest that the NRC delay review of the WNP-2 IPE until our update can be submitted.
The Supply System intends to submit the update by May 28, 1994.
Sincerely
. V. Parrish (1023)
Assistant Managing Director, Operations AJM>sic CC:
BH Faulkenberry, NRC RV NS Reynolds, Winston & Strawn JW Clifford, NRC DL Williams, BPA (399)
NRC Site Inspector (927N)
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