ML13333B656
| ML13333B656 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/26/1982 |
| From: | Paulson W Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| TASK-03-06, TASK-3-6, TASK-RR NUDOCS 8204050029 | |
| Download: ML13333B656 (5) | |
Text
March 26, 1982 Docket No.
50-206 LICENSEE:
SOUTHERN CALIFORNIA EDISON COMPANY FACILITY:
SAN ONOFRE NUCLEAR GENERATING STATION, UNIT 1
SUBJECT:
SUMMARY
OF MEETING OF MARCH 2, 1982 On March 2, 1982, members of the NRC staff met with representatives of Southern California Edison Company. The purpose of the meeting was to discuss the San Onofre Unit 1 emergency procedures for mitigating a postulated steam line break. Enclosure is a list of attendees.
The NRC staff is evaluating the capability of San Onofre Unit 1 to accomodate a steam line break. This evaluation is being conducted as part of the Systematic Evaluation Program. San Onofre Unit I does not have the capability to isolate the secondary side of the steam generators; hence, there are many possible steam line break locations which will result in the blowdown of all three steam generators. The staff's concerns regarding this issue include the method of removing decay heat following a postulated steam line break, the effect of the addition of cold auxiliary feedwater on the hot internals of the steam generator, and the possibility that a seismic event that induces failure (collapse) of the east feedwater heater platform could rupture extraction steam lines that run under the platform and also fail the safety injection piping that runs under this platform.
The current schedule indicates that the seismic upgrading of the east feedwater heater platform will be completed by January 1, 1983. The potential for inducing pressurized thermal shock is another concern that is the subject of a separate ongoing staff review.
During the meeting, we reviewed the licensee's energency operating proce dures for the mitigation of a steam line break. The NRC staff identified modifications that should be made to the procedures including better guidance on recognizing and dealing with system voids, instructions for initiating feed-and-bleed, improved instructions for recognizing increased steam generator tube leakage or tube failure that may occur following a steam line break, and better instructions for terminating safety injection or charging flow to prevent potential pressurized thermal shock. Operators should be trained in the revised procedures and in the related safety 8204050029 820326 si PDR ADOCK 05000206 51' P
PDR st March 26, 1982 concerns. In addition, the staff indicated the need for analyses to demonstrate feed-and-bleed capability. Formal staff comments will be sent to the licensee in the near future.
Original signed by Walter A. Paulson, Project Manager Operating Reactors Branch #5 Division of Licensing
Enclosure:
Attendees List OFFICE)ORB LC.D WPaTi son:dr DC chfie NRC FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USGPO: 1981-335-960
Mr. R. Dietch cc Charles R. Kocher, Assistant General Counsel James Beoletto, Esquire Southern California Edison Company Post Office Box 800 Rosemead, California 91770 David R. Pigott Orrick, Herrington & Sutcliffe 600 Montgomery Street 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 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 U. S. Environmental Protection Agency Region IX Office ATTN:
Regional Radiation Representative 215 Freemont Street San Francisco, California 94111 Robert H. Engelken, Regional Administrator Nuclear Regulatory Commission, Region V 1450 Maria Lane Walnut Creek, California 94596
ENCLOSURE
.g g
MEETING WITH SOUTHERN CALIFORNIA EDISON SAN ONOFRE UNIT 1 March 2, 1982 Name Affiliation W. Paulson NRC, DL, ORB#5 E. McKenna NRC, DL, SEPB W. G. Flourncy SCE R. Ornelas SCE R. W. Krieger SCE M. J. Kirby SCE Nick Fioravante NRC, DSI, ASB Brian Sheron NRC, DSI, RSB Angelo Morinos NRC, DSI, RSB L. B. March NRC, DSI, RSB Glenn Kelly NRC, OPE Dennis Crutchfield NRC, DL, ORB#5 Walton.L. Jensen NRC, DSI, RSB W. T. Russell NRC, DL, ORB#5
MEETING
SUMMARY
DISTRIBUTION Docket NRC PDR Local PDR ORB Reading NSIC DCrutchfield HSmith WPaulson OELD OI&E ACRS (10)
SVarga.
RClark DVassello JStolz SEPB NFioravante BSheron AMorinos LMarch GKelly Wdensen WRussell