ML20134C356
| ML20134C356 | |
| Person / Time | |
|---|---|
| Issue date: | 08/13/1985 |
| From: | Ward D Advisory Committee on Reactor Safeguards |
| To: | Dircks W NRC OFFICE OF THE EXECUTIVE DIRECTOR FOR OPERATIONS (EDO) |
| References | |
| ACRS-R-1150, NUDOCS 8508160281 | |
| Download: ML20134C356 (1) | |
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UNITED STATES I
8 NUCLEAR REGULATORY COMMISSION o
,I ADVISORY COMMITTEE ON REACTOR SAFEGUARDS O
WASHINGTON, D. C. 20555
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August 13, 1985 L
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Mr. William J. Dircks t
Executive Director for Operations E
U. S. Nuclear Regulatory Comission Washington, D. C. 20555
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Dear Mr. Dircks:
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SUBJECT:
ACRS COPMENTS ON THE SYSTEMATIC ANALYSIS OF OPERATING PLANTS FOR SEVERE ACCIDENTS f
During a meeting on August 1-2, 1985, of the ACRS Subcomittee on Class 9 Accidents, a description of a method being developed for systematic r
I analysis of the risk from operating plants was presented.
The method, L-being developed by IDCOR and eventually, when approved by NRR, to be
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used by licensees in confonnance with the Severe Accident Policy State-ment, does not include consideration of external accident initiators.
In view of the fact that a number of current PRAs have concluded that
.i external initiators make a significant contribution to risk, we recom-
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mend that whatever method is applied for the systematic analysis of 4
operating plants should treat these initiators insofar as is feasible.
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Sincerely,
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David A. Ward Chairman d#
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