ML13331A257
| ML13331A257 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/06/1988 |
| From: | Morgan H Southern California Edison Co |
| To: | NRC Office of Administration & Resources Management (ARM) |
| References | |
| NUDOCS 8805110039 | |
| Download: ML13331A257 (4) | |
Text
Southern California Edison Company SAN ONOFRE NUCLEAR GENERATING STATION P. 0. BOX 128 SAN CLEMENTE, CALIFORNIA 92672 H E.IMORGAN TELEPHONE STATION MANAGER May 6, 1988 1714) 366-6241 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C.
20555
Subject:
Docket No. 50-206 Special Report, Revision 1 San Onofre Nuclear Generating Station, Unit 1
Reference:
Letter, H. E. Morgan (SCE) to USNRC Document Control Desk dated March 30, 1988 The reference provided the required Special Report pursuant to Sections 3.14.B.4.b and 3.14.B.2.b of Appendix A, Technical Specifications (TS) to Provisional Operating License DPR-13 for San Onofre Unit 1 for various fire detection instrumentation and fire suppression systems being inoperable for greater than 14 days.
In an Attachment to the reference, the cause of inoperability and the plans and schedule to restore the detection instrumentation or suppression system to operable status were included.
This revision updates the status of fire detection instrumentation and/or fire suppression systems which had not been returned to service as noted in the reference. The updated portion of the report are appropriately annotated by double asterisks.
Additionally, on March 23, 1988. the Containment Spray System (CSS) was removed from service in accordance with procedure. Procedure requires the CSS to be removed from service during Cold Shutdown when the Reactor Coolant System temperature is less than 200 F to prevent inadvertent actuation. Compensatory fire watch and backup fire suppression equipment pursuant to TS 3.14.B.2.a were established.
These compensatory measures will remain in effect until the CSS is returned to service.
8805110039 880506 PDR ADOCK 05000206 S
Document Control Desk May 6, 1988 As reported in the reference, the CSS was previously removed from service on February 17, 1988 following Mode 5 entry for the current mid-cycle outage. On March 18, 1988, the CSS was returned to service. This was necessitated because a compensatory fire watch, required by TS while the CSS is out of service, would not have been maintained during the containment Integrated Leak Rate Testing (ILRT) conducted on March 19, 1988. This was due to the fact that during the test the containment was pressurized, precluding personnel from conducting fire watches.
If you require additional information, please so advise.
Sincerely, Attachment cc:
J. B. Martin (Regional Administrator, USNRC Region V)
F. R. Huey (USNRC Resident Inspector, Units 1, 2 and 3)
Institute of Nuclear Power Operations (INPO)
ATTACHMENT SOUTHERN CALIFORNIA EDISON COMPANY FIRE DETECTION INSTRUMENTATION/SUPPRESSION SYSTEM INOPERABLE FOR >14 DAYS SAN ONOFRE NUCLEAR GENERATING STATION UNIT 1, DOCKET NO. 50-206 Fire Zone/
Description Date
- Date Returned Reason For Equipment Inoperable to Service Inoperability Zone 16*
Sphere Enclosure Bldg.
01/04/88 04/21/88-Operable Removed from service to prevent Detection spurious actuations during welding activities associated with Nuclear Instrumentation System upgrade, and to troubleshoot and repair a failed monitoring system alarm.
Zone 11 Reactor Aux. Bldg.
02/16/88 04/06/88-Operable Removed from service to prevent Detection spurious actuations during welding activities for south charging pump outage work and to re-label zone detection wiring.
Zone 8 North Turbine Bldg.
02/17/88 03/17/88-Operable Detection removed from service to Detection/
prevent spurious actuations during Suppression welding activities and to facilitate new cable installation.
Turbine plant cooling water pump outage work required the suppression system to be removed from service.
Zone 9 Containment Spray 02/17/88 03/18/88-Operable Removed from service to perform Suppression scheduled maintenance work on the containment spray system during the current mid-cycle outage.
Zone 4 Hydrogen Seal Oil 02/28/88
- 04/15/88-Operable Removed from service to prevent Detection/
spurious actuations during welding Suppression activities for a condensate valve and pump maintenance work.
RReporting for this zone is delinquent due to oversight during routine reportability review of fire protection impairments by the Compliance group. As corrective action, the incident has been discussed with appropriate Compliance personnel involved in the review of fire protection impairments.
mChanges from the reference report
ATTACHMENT (Cont'd)
SOUTHERN CALIFORNIA EDISON COMPANY FIRE DETECTION INSTRUMENTATION/SUPPRESSION SYSTEM INOPERABLE FOR >14 DAYS SAN ONOFRE NUCLEAR GENERATING STATION UNIT 1, DOCKET NO. 50-206 Fire Zone/
Description Date
- Date Returned Reason For Equipment Inoperable to Service Inoperability Zone 9 **
Containment Spray 03/23/88 Scheduled prior to Removed from service in accordance with Suppression Mode 4 Entry from procedure to prevent inadvertent this outage actuation of the CSS.
Changes from the reference report