ML13333A355
| ML13333A355 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/05/1979 |
| From: | Haynes J Southern California Edison Co |
| To: | Ziemann D Office of Nuclear Reactor Regulation |
| References | |
| TASK-03-04.B, TASK-05-10.A, TASK-3-4.B, TASK-5-10.A, TASK-RR NUDOCS 7903140259 | |
| Download: ML13333A355 (2) | |
Text
Southern California Edison Company P 0.
BOX 800 2244 WALNUT GROVE AVENUE
- ROSEMEAD, CALIFORNIA 91770 March 5, 1979 Director of Nuclear Reactor Regulation Attention:
D. L. Ziemann, Chief Operating Reactors Branch #2 Division of Operating Reactors 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 Your letter of January 5, 1979 forwarded completed topic assessments for two SEP topics.
That letter requested that we examine the facts upon which the staff based its evaluation and respond either by confirming that the facts defining San Onofre Unit 1 are correct or by identifying any errors.
The results of our examination of the facts defining San Onofre Unit 1 in each topic assessment are provided as an enclosure to this letter.
If you have any questions regarding the enclosed, please contact me.
Very truly yours, J. G. Haynes.
Chief of Nuclear Engineering Enclosure 7903 14025-1
\\O%
RESULTS OF SCE EXAMINATION OF FACTS DEFINING SAN ONOFRE UNIT 1 IN NRC TOPIC ASSESSMENTS III-4.B Turbine Missiles Page 3, the last paragraph, it is indicated that the Unit 2 turbo-generator is no less than 700 feet from Unit 1 safety related targets.
References for the basis of the 700 feet should be provided.
V-10.A Residual Heat Removal System Heat Exchanger Tube Failures Page 3, second paragraph, it is indicated that the staff is considering that a radiation detector be provided on the common discharge of the saltwater cooling system. We believe that a detector and alarm on the common discharge of the salt water cooling system is unnecessary since, as pointed out in the staff's topic assessment, multiple failures would be required for leakage of radioactive coolant into the environment to occur.