ML13330B448
| ML13330B448 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/29/1988 |
| From: | Medford M SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| RTR-NUREG-0829, RTR-NUREG-829, TASK-06-04, TASK-6-4, TASK-RR NUDOCS 8901040222 | |
| Download: ML13330B448 (3) | |
Text
ACCELERATED DITJBUTION DEMONSTRATION SY3TEM REGULATOR*NFORMATION DISTRIBUTION SWEM (RIDS)
ACCESSION NBR:8901040222 DOC.DATE: 88/12/29 NOTARIZED: NO DOCKET #
FACIL:50-206 San Onofre Nclear Station, Unit 1, Southern Californ 05000206 AUTH.NAME AUTHOR AFFILIATION MEDFORD,M.O.
Southern California Edison Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Responds to 881024 ltr requesting status of open issues re major components of Multi-Plant Action B-24.
DISTRIBUTION CODE: A034D COPIES RECEIVED:LTR ENCL 0 SIZE: _
TITLE: OR Submittal: Containment Purging D
NOTES:License Exp date in accordance with 10CFR2,2.109.
05000206 S
RECIPIENT COPIES RECIPIENT COPIES
/
ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1
PD5 PD 5
A TRAMMELL,C 1
D INTERNAL: ACRS 6
ARM/DAF/LFMB 1
NRR.HAYES,J 1
NRR/DEST/PSB 8D 1
NRR/D RSB 8E 1
NUDOCS-ABSTRACT 1
F~ZILElI_
S
/DSIR/EI B 1
RES/DSR/RPSB 1
EXTERNAL: LPDR 1
NRC PDR 1
NSIC 1
R I
D S
A D
D NOIE 'IO AIL "RIDS" RECIPIENTS:
S PLEASE EP US TO REDUCE WASTE!
ONIACT THE DOCMEN CONIROL DESK, ROOM P1-37 (EXT. 20079) T10 ELIMNRT YOUR NNME FECH DISTRIBUTIO LISTS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED: LTTR 25 ENCL 73
Southem California Edison Company P. 0.
BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 M.0. MEDFORD TELEPHONE MANAGER OF December 29, 1988 (818 302-1749 NUCLEAR REGULATORY AFFAIRS U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 Gentlemen:
Subject:
Docket No. 50-206 Open Issues Relating to Containment Purging and Venting San Onofre Nuclear Generating Station Unit 1 By letter dated October 24, 1988, you requested the status of open issues relating to the major components of multi-plant action B-24, "Containment Venting and Purging."
The four items identified in your letter are discussed below along with the schedule for SCE action as necessary.
- 1. SCE committed to provide a technical specification change to incorporate the limitation on the opening angle of the containment vent valves.
No technical specification change has been provided.
Status: Mechanical restrictors have been installed in the containment vent valves to limit the valve openings to approximately 50 degrees.
It is SCE's intention to submit a technical specification change to incorporate this limitation along with the leak testing acceptance criteria discussed in Item 2.
- 2. SCE committed to provide a technical specification change to incorporate acceptance criteria for active and passive containment ventilation isolation valves, and for containment airlock leak testing. Although SCE submitted a technical specification change request related to airlock testing, no acceptance criteria was provided.
Status:
By letter dated March 20, 1987, SCE submitted an amendment application in order to clarify technical specification requirements for leak testing of personnel airlocks. Although this application was not related to multi-plant action B-24, the issues associated with B-24 were discussed with the NRC reviewers of this application on September 24, 1987. It was SCE's intention to submit comparative test data on the personnel airlock to provide quantitative justification for the reduction in test pressure from 10 psig to 3 psig. This information was to be provided with the leak testing acceptance criteria required by B-24. Development of the comparative test data and personnel airlock acceptance criteria was delayed due to refurbishment of 8901040222 881229 PDR ADOCK 05000206 PNUl
Document Control Desk December 29, 1988 the airlock. This testing has been completed, and initial evaluation of the test data indicates that there are no quantifiable differences between the 10 psig and 3 psig test pressures at this time, since no leakage was detected. This is probably due to the recent refurbishment of the airlock. For this reason, additional testing may be necessary during the Cycle 10 refueling outage. Therefore, SCE will provide a technical specification change for the personnel airlock acceptance criteria and the vent valve opening angle by May 31, 1989.
The submittal will also include the airlock comparative test data.
- 3. SCE committed to plant modifications relating to safety system signal override. The schedule was to be included in the integrated implementation schedule. No further information can be found on this.
Status: SCE has not included any plant modifications relating to safety system signal override in the IIS because the plant modifications and procedural revisions were implemented prior to completion of the Systematic Evaluation Program. The issue of safety system signal override was evaluated by SEP Topic VI-4, Containment Isolation System. The commitments to implement plant modifications and procedure changes, and the NRC staff acceptance of these commitments, are discussed in the SONGS 1 Integrated Plant Safety Assessment Report (NUREG-0829) dated December, 1986.
As indicated in Section 4.23 discussing Topic VI-4, plant modifications and procedure changes have been implemented and the staff considers these issues to be closed. It is noted that the only modifications related to the containment purge and vent valves was to maintain the 24-inch isolation valves of the purge system in a locked closed position during Modes 1 through 4. The necessary plant modifications have been implemented and a technical specification to reflect this configuration was approved by the NRC on February 17, 1984.
- 4. SCE has provided submittals regarding unlimited use of the 6-inch vent line. NRC review of these submittals has not been completed.
Status:
SCE is awaiting response from the NRC.
If you have any questions or require additional information, please let me know.
Very truly yours, cc: C. M. Trammell, NRR Project Manager, San Onofre Unit 1
- 3. B. Martin, Regional Administrator, NRC Region V F. R. Huey, NRC Senior Resident Inspector, San Onofre Units 1, 2 and 3