NUREG-0666, 03-17-81 NUREG-0666, a Probabilistic Safety Analysis of DC Power Supply Requirements at Nuclear Power Plants
| ML25169A041 | |
| Person / Time | |
|---|---|
| Issue date: | 03/17/1981 |
| From: | Mark J Advisory Committee on Reactor Safeguards |
| To: | Hendrie J NRC/Chairman |
| References | |
| NUREG-0666 | |
| Download: ML25169A041 (1) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION ADVISORY COMMITTEE ON REACTOR SAFEGUARDS WASHINGTON, D. C. 20555 March 17, 1981 The Honorable Joseph M. Hendrie Chairman
- u. s. Nuclear Regulatory Commission Washington, DC 20555
Subject:
NUREG-0666, "A PROBABILISTIC SAFETY ANALYSIS OF DC POWER SUPPLY REQUIREMENTS AT NUCLEAR POWER PLANTS"
Dear Dr. Hendrie:
During its 251st meeting, March 12-14, 1981, the Advisory Committee on Reac-tor Safeguards discussed the draft NUREG-0666, "A Probabilistic Safety Analy-sis of DC Power Supply Requirements at Nuclear Power Plants," with represen-tatives of the NRC Power Systems Branch {NRR) and the Division of Systems and Reliability Research (RES).
The ACRS AC/DC Power Systems Reliability Subcommittee met with NRC Staff members on January 22, 1981 to discuss de-velopments in AC/DC systems reliability, including the draft NUREG-0666.
The ACRS considers the study underlying NUREG-0666 a noteworthy application of the techniques of probabilistic analysis to system reliability problems.
Although improvements in this study may well occur in the future, the meth-ods developed in the NUREG-0666 study to identify contributors to unavaila~
bility could be utilized now to determine appropriate changes in regulatory requirements.
In the course of considering such changes, we believe an effort to develop goals for DC systems reliability is desirable. Quantitative goals would be very useful, although not necessarily required, in order to proceed at this time.
The ACRS Subcommittee plans to continue meeting with Staff members to iden-tify improvements in AC/DC systems reliability and related regulatory re-quirements.
Sincerely,
~~~
Chairman 2705