ML13331A839
| ML13331A839 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/17/1985 |
| From: | Medford M Southern California Edison Co |
| To: | Lear G Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML13331A840 | List: |
| References | |
| NUDOCS 8512190078 | |
| Download: ML13331A839 (3) | |
Text
REGULATORY INFORMATION DISTRIBUTION oYSTEM (RIDS)
ACCESSION NBR:B512190078 DOC.DATE: 85/12/17 NOTARIZED: NO DOCKET #
FACIL:50-206 San Onofre Nuclear Station, Unit 1, Southern Californ 05000206 AUTH.NAME AUTHOR AFFILIATION MEDFORDM.D.
Southern California Edison Co.
RECIP.NAME RECIPIENT AFFILIATION LEARG.E.
Division of Pressurized Water Reactor Licensing -
A (post 8
SUBJECT:
Application for amend to License DPR-13,consisting of proposed Change 136,revising Tech Specs re fire protection sys surveillance.
DISTRIBUTION CODE: AOO6D COPIES RECEIVED:LTR ENCL SIZE: ____
Z TITLE: OR Submittal: Fire Protection NOTES:NRR PWR-B ISAPD 1cy.
05000206 OL:03/27/67 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PWR-A PDI PD 01 3
3 DUDLEYR 1
1 INTERNAL: ACRS 11 3
3 ADM/LFMB 1
0 ELD/HDS2 1
0 IE WHITNEY,L 1
1 NRR PWR-A DIR 1
1 NRR PWR-B DIR 1
1 NRR STANG,J 07 2
2 NRR WERMEILJ06 1
0 R
1 1
NRR/DSRO DIR 1
1 EQ FILE 04 1
1 RON5 1
1 EXTERNAL: 24X 1
1 LPDR 03 1
1 NRC PDR 02 1
1 NSIC 05 1
1 NOTES:
1 1
TOTAL NUMBER OF COPIES REQUIRED: LTTR 25 ENCL 22
II>
(1)
Southern California Edison Company P. 0.
BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 M.O.MEDFORD TELEPHONE MANAGER, NUCLEAR LICENSING (818) 302-1749 December 17, 1985 Director, Office of Nuclear Reactor Regulation Attention:
Mr. G. E. Lear, Director PWR Project Directorate No. 1 U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
Subject:
Docket No. 50-206 Proposed Change No. 136 Fire Protection Technical Specifications San Onofre Nuclear Generating Station Unit 1 By letter dated June 8, 1984, Proposed Change No. 136 to the Technical Specifications for San Onofre Unit 1 was submitted as part of Amendment Application No. 120 for Provisional Operating License No. DPR-13.
This proposed change provided an overall revision to the existing fire protection technical specifications to incorporate new equipment and revised concepts associated with more recent revisions of the Standard Technical Specifications. During NRC review of the proposed change, discussions were held with NRC staff members during which several revisions were requested.
These revisions have been incorporated into the technical specifications provided as the enclosure to this letter.
The first major issue associated with the NRC requested revisions deals with the concept of Fire Area accessibility for fire watches as part of the Action requirements of the Limiting Conditions for Operation. The concept of a temporary inaccessibility of a fire area had been confused with the permanent inaccessibility during plant operation of certain other fire areas (e.g., containment). The rewording in the revised technical specification should resolve this confusion. These concepts are further explained in the Bases of the technical specifications.
The second major issue resulting in revisions to the proposed change is associated with the elimination of the proposed alternative to the fire watch patrols in the ACTION statements.
This alternative consisted of the establishment of the operability of the detection system in a fire area if the suppression system was inoperable and vice versa, in lieu of a fire watch patrol.
The NRC staff indicated that this was an unacceptable alternative at the present time. The affected portions of the proposed change have been revised accordingly.
8512190078 851217 PDR ADOCK 05o00206
Mr. G.
December 17, 1985 The third major issue to arise from the NRC review is associated with the surveillance of fire doors.
The proposed change would have reduced the frequency of fire door surveillance. The NRC staff indicated that this was unacceptable and the Standard Tech Spec frequencies are required at this time. The affected surveillance of the proposed change have been revised accordingly.
The last issue to result from the NRC review was the use of automatic suppression as a compensatory measure in the ACTION statement of the fire barrier technical specifications. The compensatory measure consists of utilizing automatic suppression in lieu of fire detectors in the ACTION statement. The NRC staff indicated that this is acceptable when justification is provided on a case by case basis. This compensatory measure has been used for several walls at San Onofre Unit 1. Sprinkler system #4 is designed to specifically protect the fire barriers located at the North Wall of the Turbine Building and the East and South Walls of the 480 V Room. Sprinkler system #5 is being utilized for the North Wall of the Turbine Building, the East Wall of the 480 V Room and the West Wall of the 4160 V Room. These sprinkler systems provide adequate protection for the fire barriers identified above. This protection is in addition to other immediate fire suppression systems in the area.
An additional revision has been made to Table 3.14.3, "Fire Detection Instruments," to further update the listing of the detector configuration at the plant. As indicated in the original Proposed Change No.
136, this table was updated to reflect the new detectors added since the last issuance of the table. The revised table provided in the enclosure to this letter reflects additional changes made to the fire detection systems as documented in the Updated Fire Hazards Analysis, transmitted to the NRC by letter dated February 11, 1985.
The change in Detector Zone 16 is associated with modifications which will be made during the current outage.
Based on our review of the information included in the enclosure, there is no change to our previous conclusion stated in our June 8, 1984 letter that these proposed changes do not constitute a significant hazards consideration.
If you have any questions or desire additional information, please contact me.
Very truly yours, Enclosure