ML13330A244
| ML13330A244 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/04/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Dietch R Southern California Edison Co |
| References | |
| TASK-06-07.B, TASK-6-7.B, TASK-RR LSO5-81-03-001, LSO5-81-3-1, NUDOCS 8103120304 | |
| Download: ML13330A244 (4) | |
Text
MAR 0 4 981 Docket No. 50-206 Mr. R. Dietch, Vice President Nuclear Engineering and Operations Southern California Edison Company 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770
Dear Mr. Dietch:
SUBJECT:
SEP TOPIC VI-7.B, ESF SWITCHOVER (SAN ONOFR:E)
REQUEST FOR ADDITIONAL INFORMATION The enclosed request for additional information has been prepared as part of our evaluation of the ESF Switchover from Injection to Recirculation Modes at San Onofre.
Because this concern is a part of a SEP Topic, response within 30 days is requested so that we maintain the present SEP review schedule.
Sincerely, Dennis M. Crutchfield, Chief Operating Reactors Branch No. 5 Division of Licensing
Enclosure:
As stated cc w/enclosure:
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.2WASHINGTON, D. C. 20555 MAR04 981 Dock t No 50-206 LSO 3-001 Mr. R. Dietch, Vice President Nuclear Engineering and Operations Southern California Edison Company 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770 Dear Mr. Dietch;
SUBJECT:
SEP TOPIC VI-7.B, ESF SWITCHOVER (SAN ONOFRE)
REQUEST FOR ADDITIONAL INFORMATION The enclosed request for additional information has been prepared as part of our evaluation of the ESF Switchover from Injection to Recirculation Modes at San Onofre.
Because this concern is a part of a SEP Topic, response within 30 days is requested so that we maintain the present SEP review schedule, Sincerely, Dennis M, Crutchfield, Chi f Operating Reactors Branch No, 5 Division of Licensing
Enclosure:
As stated cc w/enclosure:
See next page
Mr. R. Dietch SAN ONOFRE NUCLEAR GENERATION STATION, W
W UNIT NO. 1 DOCKET NO. 50-206 cc Charles R. Kocher, Assistant Director, Technical Assessment General Counsel Division Southern California Edison Company Office of Radiation Program.
Post Office Box 800 (AW-459)
Rosemead, California 91770 U. S. Environmental Protection Agency David R. Pigott Crystal Mall 12 SSamuel B. Casey Arlington, Virginia 20460 Chickering & Gregory Three Embarcadero Center U. S. Environmental Protection Twenty-Third Floor Agency San Francisco, California 94111 Region IX Office ATTN:
EIS COORDINATOR Jack E. Thomas 215 Freeront Street Harry B. Stoehr San Francisco, California 94111 San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 Resident Inspector c/o U. S. NRC P. 0. Box AA Oceanside, California 92054 Mission Viejo Branch Library 24851 Chrisanta Drive Mission Viejo, California 92676 Mayor City of San Clemente San CleDtente, California 92672 C
hai rmnan Board of Supervisors County of San Diego San Diego, California 92101 California Department of Health ATTN:
Chief, Environmental Radiation Control Unit Radiological Health Section 114 P Street, Room 498 Sacramento, California 95814
REQUEST FOR ADDITIONAL INFORMATION ON SEP TOPIC VI-7.B By text, P&ID, and electrical schematics; provide the following additional information with regard to the design provisions for satisfying the requirements of Branch Technical Position ICSB-20:
(1) For each instrument, indicator, logic device and alarm that is used by the operator to perform a manual function in the switchover sequence; describe how that device is qualified and installed (e.g. independence and separation of circuits) as Class 1E equipment.
(2) Describe the paths of the minimum flow lines from each ECCS pump discharge to the line end.
This description should identify all valves in these lines, the signals that control each valve, the power sources for each valve, and the qualification of each valve.
(3) For each minimum flow line that returns to a point other than the pump intake point, provide a single failure analysis and quantify the offsite dose rate, dose, and dose assumptions obtaining from all single failures that do not isolate these lines during the recirculation phase of ECC.