ML20024G732
| ML20024G732 | |
| Person / Time | |
|---|---|
| Issue date: | 04/18/1991 |
| From: | Ward D Advisory Committee on Reactor Safeguards |
| To: | Taylor J NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
| References | |
| REF-GTECI-130, REF-GTECI-NI, TASK-130, TASK-OR ACRS-R-1425, NUDOCS 9104290038 | |
| Download: ML20024G732 (2) | |
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UNITED S1 ATES ft NUCLEAR REGULATORY COMMISSION ACRSR-1425 ADVISORY COMMITTEE ON REACToH SAFEGUARDS a
WASHINGTON, D. C. 20bb6
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April 18, 1991 l
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Mr. James M. Taylor Executive Director for Operations U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Taylor:
I
SUBJECT:
PROPOSED RESOLUTION OF GENERIC SAFETY ISSUE
- 130,
" ESSENTIAL SERVICE WATER SYSTEM FAILURES AT MULTI-UNIT SITES" During the 372nd meeting of the Advisory Committee on Reactor Safeguards, April 11-13, 1991, we reviewed the NRC staf f's proposed resolution of Generic Safety Issue 130, " Essential Service Water System Failures at Multi-Unit Sites."
Our Subcommittee on Auxiliary and Secondary Systems also reviewed this matter during its meeting on March 22, 1991.
During this review, we had the benefit of discussions with representatives of the NRC staff and of the documents referenced.
We do not agree with the staff's conclusion that issuance of the proposed generic letter has been justified on a cost-benefit basis.
A number of assumptions used in the analysis do not appear to provide a fair and balanced comparison of potential costs and benefits.
It appears to us that there would be a wide variation in the conclusions if-the analysis were done for each individual plant.
We believe that the emergency service water systems of these seven plants should be analyzed as a part of their Individual Plant Examinations (IPEs).
Vulnerabilities should be corrected where neces,sary.
The staff should consider making the analysis _it has performed for this proposed resolution available to these licensees for use in performing their IPEs.
1 In _the interim, we believe that the staf f can assure itself through I
t its inspection program that the licensees of these plants are applying appropriate risk management to the operation and surveillance of thcir emergency service water systems.
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. Mr._ James M. Taylor 2
April 18, 1991 i
- We.will consider the advisability of requiring a separate and independent cooling system for reactor coolant pump seals when we review the proposed resolution of Generic Issue 23,
" Reactor Coolant Pump Seal Failures."
Sincerely, I
David A. Ward Chairman
References:
1.
Memorandum dated March 6, 1991 from Warren Minners, Office of Nuclear Regulatory Research, to Raymond F.
Fraley, Advisory Committee on Reactor Safeguards, Subjects-Resolution Package of Generic Issue 130, " Essential Service Water System Failures at Multi-Unit Sites," with enclosures (Predecisional) 2.
Memorandum dated March 29, 1991 from Warren Minners, Office of Nuclear Regulatory Research, to Raymond F. Fraley, Advisory Committee'on Reactor Safeguards,
Subject:
Resolution Package of Generic Issue-130, " Essential Service Water System Failures at Multi-Unit Sites," with enclosures (Pradecisional)
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