ML20126H180
| ML20126H180 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 05/31/1985 |
| From: | Reinaldo Rodriguez SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Thompson H Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20126H184 | List: |
| References | |
| GL-83-28, RJR-85-276, TAC-82793, NUDOCS 8506100285 | |
| Download: ML20126H180 (2) | |
Text
.t esuun SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, P.O. Box 15830, Sacramento, CA 95813; (916) 452-3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CAllFORNIA RJR 85-276 May 31, 1985 DIRECTOR OF NUCLEAR REACTOR REGULATION ATTENTION HUGH L THOMPSON JR DIRECTOR DIVISION OF LICENSING U S NUCLEAR REGULATORY COMMISSION WASHINGTON D C 20555 DOCKET 50-312 RANCHO SEC0 NUCLEAR GENERATING STATION UNIT N0. 1 GENERIC LETTER 83-28, ITEM 1.1 POST TRIP REVIEW Your Safety Evaluation Report (SER) dated April 15, 1985, requested additional information to complete your review of the Districts November 4,1983 response to Generic Letter 83-28, Item 1.1, Post Trip Review.
Specifically you requested that the District provide a systematic safety assessment program to assess unscheduled reactor trips (SER Section III.E).
Attached is the Districts procedure which requires a systematic safety assessment for post-trip review, AP-28, Post Trip Transient Report. The District has reviewed the guidelines in your SER and considers that this procedure provides a systematic safety assessment to assess unscheduled reactor trips.
You should note that the procedure uses the term "most probable cause" rather than " root cause". The District uses the phrase
" root cause" for the followup or longterm assessment which is a deliberate and thorough investigation that is normally not completed until after startup. Also, the procedure allows the Shift Supervisor to delegate the authority to reconstuct the transient to a Senior Reactor Operator.
- But, the Shift Supervisor still is required to review and approve the trip investigation.
DR D
v Hugh L. Thompson Jr.
< May 31, 1985
.c A
If you have any questions feel free to contact" Robert Roehler of my staff at (916) 452-3211, ext. 4905.
g R. J. R drigu Assistant General Manager, Nuclear l
i l
l l
l
..