ML13331A234
| ML13331A234 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 11/04/1987 |
| From: | Medford M SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| REF-PT21-87, REF-PT21-87-203-000 PT21-87-203, PT21-87-203-000, NUDOCS 8711100361 | |
| Download: ML13331A234 (2) | |
Text
Southern California Edison Company P. 0.
BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 M. 0. MEDFORD TELEPHONE MANAGER OF NUCLEAR ENGINEERING (818) 302-1749 AND LICENSING November 4, 1987 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 Gentlemen:
Subject:
Docket No. 50-206 Imo Delaval 10 CFR 21 Reports Standby Diesel Generators San Onofre Nuclear Generating Station Unit 1
References:
A) Letter from J. A. Zwolinski (NRC) to K. P. Baskin (SCE),
dated June 17, 1985, Transamerica Delaval, Inc. (TDI)
Diesel Generators -
Recent 10 CFR Part 21 Reports from TOI B) Letter from M. 0. Medford (SCE) to G. E. Lear (NRC), dated October 31, 1986, Transamerica Delaval, Inc. (TDI) Diesel Generators Recent 10 CFR 21 Reports from TDI In accordance with your Reference A request, enclosed for your information is the latest update of actions taken by Southern California Edison (SCE) in response to 10 CFR 21 notifications from Imo Delaval, Inc. (formerly TDI),
regarding problems potentially applicable to the San Onofre Unit 1 standby diesel generators. This update covers a TDI notification dated May 28, 1987, regarding defective air pressure regulators. Our previous update was submitted to you by Reference 8.
If you have any questions, please let me know.
Very truly yours, Enclosure cc: J. 0. Bradfute, NRR Project Manager, San Onofre Unit 1 J. B. Martin, Regional Administrator, NRC Region V F. R. Huey, NRC Senior Resident Inspector, San Onofre Units 1, 2 and 3 8711100361 871104 PDR ADOCK 05000206 6
TABLE SHOWING SCE'S ACTIONS RELATIVE TO RECENT IMO DELAVAL (TDI) 10 CFR 21 REPORTS Date of Potential Problem.
SCE's Actions to Assess 10 CFR 21 Causes and Imo Delaval If Potential Problem Corrective Actions and Report (TDI)'s Recommendation Exists at San Onofre Unit 1 Implementation Schedules 5/28/87 A potential problem exists with Both diesel generators were Bellofram type 50 and 60 air pressure regulators in the inspected and found not to air regulators are included control air supply to the engine have the subject type in the Control of Problem control panel.
Bellofram regulators installed.
An Equipment (COPE) program has identified regulators investigation was performed to ensure there will be no manufactured in 1986 which concluded that none of future procurements of the as being potentially the defective regulators is defective items.
defective. Date codes stamped in stock or on order.
on the regulator housing bottom identify items which were manufactured in 1986. The defect consists of a mismachined seating surface in the drip well gasket, which may result in gasket failure and loss of starting air pressure.
IAA:8961F:0124U:kf havethesubecttyp reguator insalle.
A