ML13330A278
| ML13330A278 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/18/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Dietch R SOUTHERN CALIFORNIA EDISON CO. |
| Shared Package | |
| ML13330A280 | List: |
| References | |
| TASK-03-05.B, TASK-06-07.D, TASK-3-5.B, TASK-6-7.D, TASK-RR LSO5-81-03-043, LSO5-81-3-43, NUDOCS 8104070664 | |
| Download: ML13330A278 (3) | |
Text
DISTRIBUTION:
March 18, 1981 Docket No. 50-206 NSIC ORB#5 Reading TERA NRC PDR ACRS(10)
Local PDR GCwalina Docket No. 50-206DisnuDrah4 LS05-81-03-043 DEisenhut DKragh(4)
JHeltemes DCrutchfiel d Mr. R. Dietch, Vice President H~mith Nuclear Engineering and Operations HSmith Southern California Edison Company SNowicki 2244 Walnut Grove Avenue IE(3 Post Office Box 800 I&E(3)
Rosemead, California 91770
- JBurdoin, RE:V
Dear Mr. Dietch:
RHen
SUBJECT:
MULTI-PLANT ISSUE B-11 AND PARTIAL REVIEW OF SEP TOPICS III.5.b AND VI.7.d We have completed our review of topic B-11 "Susceptibility of Safety Related Systems to Flooding from Failure of Non-Category -I Systems for San Onofre Nuclear Power Plant Unit 1."
The enclotsd Safety Evaluation Report (SER) provides our conclusions that the existing design features combined with your proposed modifications to protect safety-related equipment from floodingf as a consequence of failure of non-Category I sources outside of containment is acceptable.
The Technical Evaluation Report (TER) notes the modifications proposed by you that include, (1) installation of redundant level alarm switches in the condenser pit-which alarms in the control room, (2) installation of flow restrictors over the circulating water line expansion joints, (3) changes in the operating procedures which require operators to enter vital areas twice per plant operating shift, and (4) upgrading the condensate storage tank foundations as necessary after the seismic evaluation. rThe modifications are expected to be implemented around June 1981.
These modifications and your implementation schedule were found to be acceptable.
This transmittal completes our review of topic B-11.
The results of this review will be factored into the assessments of SEP topics III.5.b "Pipe Break Outside Containment" and VI.7.d "Long Term Cooling-Passive Failures." Should you have any questions regarding this matter contact your project manager, Stanley J. Nowicki.
Sincerely, Original signed by Dennis M. Crutchfield, Chief Operating Reactors Branch #5 8104070"l (Division of Licensing
Enclosure:
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 March 18, 1981 Docket No. 50-206 LSO5-81-03-043 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 MULTI-PLANT ISSUE B-l AND PARTIAL REVIEW OF SEP TOPICS III.5.b AND VI.7.d We have completed our review of topic B-11 "Susceptibility of Safety Related Systems to Flooding from Failure of Non-Category I Systems for
-San Onofre Nuclear Power Plant Unit 1."
The enclosed Safety Evaluation Report (SER) provides our conclusions that the existing design features combined with your proposed modifications to protect safety-related equipment from flooding as a consequence of failure of non-Category I sources outside of containment is acceptable.
The Technical Evaluation Report (TER) notes the modifications proposed by you that include, (1) installation of redundant level alarm switches in the condenser pit which alarms in the control room, (2) installation of flow restrictors over the circulating water line expansion joints, (3) changes in the operating procedures which require operators to enter vital areas twice per plant operating shift, and (4) upgrading the condensate storage tank foundations as necessary after the seismic evaluation. The modifications are expected to be implemented around June 1981.
These modifications and your implementation schedule were found to be acceptable.
This transmittal completes our review of topic B-11.
The results of this review will be factored into the assessments of SEP topics III.5.b "Pipe Break Outside Containment" and VI.7.d "Long Term Cooling-Passive Failures. Should you have any questions regarding this matter contact your project manager, Stanley J. Nowicki.
Sincerely, nnis M. Crutc field, hief Operating'Reactors Branch #5 Division of Licensing
Enclosure:
As stated cc w/enclosure:
See next page
Mr. March 18, 1981
.cc.
Charles R. Kocher, Assistant Director, Criteria and Standards General Counsel Division Southern California Edison Company Office of Radiation Programs Post Office Box 800 (ANR-460)
Rosemead, California 91770 U. S. Environmental Protection Agency David R. Pigott Washington, D. C. 20460 Samuel B. Casey Chickering & Gregory U. S. Environmental Protection Three Embarcadero Center
- Agency Twenty-Third Foor..
Region IX Office San Francisco, California 94111 ATTN:
EIS COORDINATOR 215 Freemont Street Jack E. Thomas San Francisco, California 94111 Harry B. Stoehr, San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 Resident Inspector/San Onofre NPS c/o U. S. NRC P. 0. Box 4329 San Clemente, California 92672 Mission Viejo.Branch Library 24851 Chrisanta Drive Mission Viejo, California 92676 Mayor City of San Clemente San Clemente, California 92672 Chairman Board of Supervisors County of San Diego San Diego, California 92101 California Department of Health ATTN: Chief, Environmental Radiation Control Unit Radiological Health Section 714 P Street, Room 498 Sacramento, California 95814