ML13330A137
| ML13330A137 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 10/15/1980 |
| From: | Baskin K Southern California Edison Co |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| TASK-07-04, TASK-7-4, TASK-RR NUDOCS 8010240491 | |
| Download: ML13330A137 (3) | |
Text
Southern California Edison Company P.
. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD. CALIFORNIA 91770 K. P. BASKIN TELEPHONE MANAGER OF NUCLEAR ENGINEERING, October 15, 1980 (213) 572-1401 SAFETY, AND LICENSING Director 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 Flooding from Non-Safety Related Piping and Equipment San Onofre Nuclear Generating Station Unit 1 On October 8, 1980, Mr. John Burdoin of the NRC staff, requested Southern California Edison supply additional information required to evaluate San Onofre Nuclear Generating Station Unit 1 flooding from the failure of non-safety related piping and equipment. The requested information is provided as an enclosure to this letter.
If you or your staff have any additional questions, please let me know.
Very truly yours, Enclosure 00 10PA$41
Attachment Item 1 Provide a conceptual design orawing for the proposed modification to the condenser bellows.
Response
Attached is a conceptual drawing of a sleeve to be fitted around the condenser bellows. The sleeve is designed to limit the flooding rate from a ruptured bellows to less than the condenser bay sump pump capacity. This conceptual design has not been evaluated for seismic capacity.
Item 2 What domestic water sources are in the vicinity of the control room, and what floor drains, if any, are nearby?
Response
The domestic water supplies in the vicinity of the control room are in the kitchen, toilet, radiochemistry lab and the turbine plant lab. There is also a drinking fountain in the hallway outside the control room. There are three (3) floor drains in the turbine plant lab and one (1) floor drain in the toilet.
It should be pointed out that the potential flooding rate from a domestic water line is small. Since the control room area is continuously manned, any flooding will be detected immediately and appropriate corrective action taken. Thus, flooding of safety related equipment in the control room from the failure of a domestic water line is incredible.
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