ML13331A436
| ML13331A436 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/15/1990 |
| From: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML13331A437 | List: |
| References | |
| GL-85-09, GL-85-9, NUDOCS 9006190074 | |
| Download: ML13331A436 (2) | |
Text
Southern California Edison Company 23 PARKER STREET IRVINE, CALIFORNIA 92718 HAROLD B.
RAY TELEPHONE SENIOR VICE PRESIDENT June 15, 1990 714-458-4400 U. S. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, D.C. 20555 Gentlemen:
Subject:
Docket No. 50-206 Supplement to Amendment Application No. 161 Regarding Reactor Protection System Instrumentation San Onofre Nuclear Generating Station, Unit 1
Reference:
NRC to SCE letter dated October 31, 1989; Amendment Application No. 161 Regarding Increased Surveillance Intervals For RPS Testing for San Onofre Nuclear Generating Station, Unit 1 This letter provides a supplemental change to Amendment Application No. 161 consisting of Proposed Change No. 183 (PCN 183), Revision 1, which addresses open Systematic Evaluation Program (SEP) issues and Generic Letter 85-09 regarding testing of Reactor Trip System and Engineered Safety Features.
BACKGROUND Amendment Application No. 161 was initially submitted on December 29, 1988.
It included the following:
(1) A request to incorporate Limiting Conditions for Operation and surveillance requirements in the Technical Specifications to address issues pertaining to SEP Topic VI-10.A, "Testing of Reactor Trip System and Engineered Safety Features, Including Response Time Testing."
(2) Westinghouse recommendations to increase surveillance intervals for Reactor Protection System components as documented in WCAP 10271, "Evaluation of Surveillance Frequencies and Out of Service Times for the Reactor Protection Instrumentation System."
(3) Requirements for the testing of the reactor trip breakers undervoltage and shunt trip attachments, in response to Generic Letter 85-09, "Technical Specifications for Generic Letter 83-28, Item 4.3."
Your letter dated October 31, 1989 requested additional information regarding the proposed change to extend the RPS instrumentation surveillance intervals.
9006190074 900615 PDR ADuOCK:
05000206 P
Document Control Desk
-2 June 15, 1990 DISCUSSION In response to your questions, we conducted a detailed review of the PCN. The Westinghouse Owners Group (WOG) recommendations to extend RPS surveillance intervals are consistent with WOG guidelines and are based on the design of a Westinghouse generic plant that conforms to the Westinghouse Standard Technical Specifications (STS).
Since SONGS 1 is not consistent with the Westinghouse generic design or the STS, we are withdrawing our request to extend the RPS instrumentation surveillance intervals, pending further evaluation. The enclosed revision to PCN 183 only requests NRC approval of technical specification changes related to the above discussed SEP topic and generic letter. We are continuing our evaluation of the applicability of the WOG guidelines to the SONGS I design.
If we determine the guidelines are applicable, then we will submit a separate amendment request to incorporate the appropriate changes related to increased surveillance intervals.
If you have any questions regarding this matter, please let me know.
Very truly yours, cc: J. B. Martin, Regional Administrator, NRC Region V C. Caldwell, NRC Senior Resident Inspector, San Onofre Units 1, 2 and 3 J. H. Hickman, California Department of Health Services