ML13317A625
| ML13317A625 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/01/1981 |
| From: | Moody W Southern California Edison Co |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| TASK-06-07.C, TASK-06-07.C2, TASK-6-7.C, TASK-RR NUDOCS 8106050400 | |
| Download: ML13317A625 (1) | |
Text
Southern California Edison Compa P. O.
BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 W. C. MOODY TELEPHONES MANAGER, NUCLEAR LICENSING June 1,
1981 (213) 572-1817 (213) 572 -1806 Director, Office of Nuclear Reactor Regulation Attention:
D. M. Crutchfield, Chief Operating Reactors Branch No. 5 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
Subject:
Docket No.
50-206 Systematic Evaluation Program San Onofre Nuclear Generating Station Unit 1 This letter is in response to your March 13, 1981 letter on SEP Topics VI-7.C, ECCS Single Failure Criterion and Requirements for Locking Out Power to Valves, and VI-7.C.2, Failure Mode Analysis.
Your assumption that we have complied with your October 16, 1978 request to install redundant undervoltage relays on each of the 4160 V buses IC and 2C during the Cycle 7 refueling outage is correct.
The redundant undervoltage relays were installed during the Cycle 7 refueling outage as part of Design Change 78-17.
The remaining three modifications as identified in your October 16, 1978 letter have not been implemented, but postponed into the integrated assessment of the Systematic Evaluation Program.
If you have any questions regarding this matter, please let me know.
Very truly yours, 81060so900p