ML13317A854
| ML13317A854 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 02/04/1982 |
| From: | Baskin K Southern California Edison Co |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0485, RTR-NUREG-485, TASK-***, TASK-RR NUDOCS 8202080185 | |
| Download: ML13317A854 (3) | |
Text
Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 K. P. BASKIN TELEPHONE MANAGER OF NUCLEAR ENGINEERING, (213) 572 1401 SAFETY, AND LICENSING
'February 4,
1982 Director, Office 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 Systematic Evaluation Program San Onofre Nuclear Generating Station Unit 1 The purpose of this letter is to document the schedule for completion of the Systematic Evaluation Program (SEP) for San Onofre Unit 1 as discussed at the meeting with the NRC on January 28, 1982.
This letter discusses the schedule for completion of assessments for those topics for which SCE has responsibility and also SCE's proposed approach and schedule for performing the SEP integrated assessment.
The schedule for completion of those topic assessments to be prepared by SCE is provided in the Enclosure to this letter. The schedule dates ensure that all topics will be complete by December 1982 in accordance with the latest issue (November 30, 1981) of NUREG-0485, the SEP Status Summary Report. It should be noted that the schedule for SEP Topics III-3.A, Effects of High Water Level on Structures, and III-4.C, Internally Generated Missiles have been revised from the dates discussed at the January 28 meeting. The former was revised to reflect the NRC schedule for completion of Topics II-3.A and II-3.B as discussed with the NRC staff. The latter was revised based on further review of the level of effort required to complete the evaluation.
In addition, at the January 28 meeting, the schedule for Topics III-5.A and III-5.B regarding high energy line breaks was discussed because the completion of these topics is scheduled for December 1, 1982. We agreed to meet with the staff in early February to discuss our program for resolution of these topics and to discuss ways of expediting this schedule.
That meeting is currently being scheduled with the staff.
I With respect to the SEP integrate@djssessment, we are proposing that the integrated assessment for San Onofre UbW C1 be performed by SCE and submitted to the NRC for your review and concurrence. It would be our intention to perform conceptual engineering of modifications which would resolve all differences from current criteria and to base the integrated assessment on cost benefit and risk considerations associated with these conceptual modifications. Although we do not have a plant specific probabilistic risk assessment (PRA) for San Onofre Unit 1, it would be our intention to use available PRA studies and techniques to the extent possible.
8202080185 820204 PDR ADOCK 05000206
Mr. T.
M..- Crutchfiel d February 4, 1982 We anticipate that completion of the integrated assessment would take 5 to 7 months from. the time the results are availabl.e for all of the SEP topics.
It would be our intention to meet with the NRC on a regular basis during this time period to discuss various milestones and obtain NRC feedback on the progress of.the integrated assessment process.
If you have any questions or require additional information, please let us know.
Very truly yours,
Enclosure SCHEDULE FOR SEP TOPIC ASSESSMENTS TO BE' PREPARED BY SCE Topic No.
Description Schedule Remarks II-1.C Offsite Hazards 11/12/81 Complete II-4.D Slope Stability 11/02/81 Complete II.4.F Settlement 11/02/81 Complete II-2 Wind'and Tornado 5/01/82 Loadings
-III-3.A Effects of High 5/21/82 Based on NRC completion Water Level -.
of SERs.for Topics II-3.A and II-3.B by March 15, 1982.
III-4.A Tornado Missiles 5/01/82 III-4,C Internally Generated 4/30/82 Missiles I.II-4.D Site Proximity 10/23/81 Complete Missi.les III-5.A HELB Inside 12/01/82 Containment III-5.B HELB Outside 12/01/82 Containment IV-2 Reactivity Control 4/30/82 Sy st ems VI-1 Organic Materials
.1/28/82 Complete IX-1 Fuel Storage 4/30/82 IX-3 Service Water 11/02/81 Complete Systems IX-5 Ventilation Systems 12/16/81 Complete XV-4 Loss of AC Power 8/18/81 Complete XV-16 Failure of Small 8/04/81 Complete Lines Outside Containment