ML20081C701
| ML20081C701 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 10/18/1983 |
| From: | Haynes J SOUTHERN CALIFORNIA EDISON CO. |
| To: | Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| NUDOCS 8310310326 | |
| Download: ML20081C701 (6) | |
Text
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RECSVED i:rr Southern California Edison Comp'anyi 2l [p p e 51 S A N ONOFR E NUC LE AR GENER A T ING S T A tlON P. O. 8 01 120 S A N C LEME N T E, C A LlF ORNI A 92673 Cetober 18, 1983 U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region V 1450 Maria Lane, suite 210 Walnut Creek, California 94596-5368 Attention:
Mr. J.
B.
Martin, Regional Administrator
Dear Sir:
Subject:
Docket Nos. 50-361 and 50-362 30-Day Report, Inoperable Fire Doors San Onofre Nuclear Generating Station, Units 2 and 3
Reference:
Letter, H.
B. Ray (SCE) to J.
B. Martin (NRC),
dated September 21, 1983 In accordance with our referenced letter, this submittal provides the 30-day written report, pursuant to Technical Specification 6.9.1.13.b, for fire-rated assemblies (specifically fire dcors) found inoperable during routine surveillances.
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Fire doors found inoperable during the September routine surveillances are identified in the Attachment and include:
20 latching mechanism failures; 27 closure mechanism failures; and 19 doors blocked open typically for construction, startup or maintenance activities.
As each of these deficiencies was identified, compensatory fire watches, pursuant to Technical Specification 3.7.9, Action Statement
'a',
were established.
Latching mechanism failures and closure mechanism failuren have been caused partially by a degradation of hardware as a result of high usage and partially by differential air pressure problems.
Plans to upgrade door latches and closure mechanisms into heavier duty hardware on several selected 603rs are being developed.
8310310326 831018 PDR ADOCK 05000361
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Mr. J. B. Martin October 18, 1983 Differential air pressure problems are caused by a change in differential air pressure between the Radwaste and Control Buildings.
The supply and exhaust fans to the radwaste building currently do not have an adequate interlock between them to prevent the operation of a supply fan if its corresponding exhaust fan is not operating, and vice versa.
A change in differential pressure has been a recurring problem which necessitates the continual readjustment of fire door closure mechanisms spring tension.
A DCP is being developed to ensure a constant pressure differential across access doors, thereby providing a consistent closure force to reduce the door closure problems.
The administrative deficiencies which have permitted the 19 fire doors to be blocked open are being investigated.
The cause and corrective action will be discussed in the October monthly report.
Results of such surveillances conducted during October 1983 will be reported by November 15, 1983.
If you require any additional information, please so advise.
Sincerely,
/
J G.
STATI MANAGER Attachment f
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ATTACH!!ENT SOUTHERN CALIFOR!!IA EDISON COMPANY INOPERABLE FIRE DOORS FOR THE MONTH OF SEPTEMBER 1983 SAN ONOFRE NUCLEAR GENERATING STATION UNITS NO. 2 AND 3, DOCKET NOS. 50-361 and 50-362 l
I.
Latching Mechanism Failures:
Number of doors failing - 20, as follows:
Door Number Inoperable Operable AR-104 09/11 09/19 09/20 09/21
'09/27 Work in Progress DG3-104 09/11 09/12 09/17 Work in Progress AC-115 09/14 09/21 09/22 Work in Progress AC-118 09/09 09/22 09/23 09/26
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09/27 Work in Progress AC-127 09/01 09/11 09/12 Work in Progress AC-131 09/01 09/05 09/06 09/13 09/14 09/15 AR-203 09/13 09/19
/
09/20 Work in Progress AC-225 09/01 09/02 09/09 09/15 09/23 09/26 AC-233 09/01 09/03 09/04 09/07 AC-257 09/02 09/03 09/14 09/15 09/16 09/17 AC-304 09/27 09/30 AC-310 09/08 09/11 09/12 09/20 AC-338 09/09 09/10 09/12 09/15 09/16 09/19 09/21 09/26 09/27 Work in Progress AC-350 09/11 09/13 C3-401 09/30 Work in Progress C3-403 09/14 09/16 09/17 09/19 09/20 09/21 AR-404 09/09 09/15 09/17 09/20 09/29 Work in Progress C2-405 09/06 09/21 AR-504 09/07 09/09 09/11 09/15 09/17 Work in Progress AR-508 09/07 09/09 09/27 09/28 m
6A
---J ATTACHMENT SOUTHERN CALIFORNIA EDISON COMPANY INOPERABLE FIRE DOORS FOR THE MONTH OF SEPTEMBER 1983 SAN ONOFRE NUCLEAR GENERATING STATION UNITS NO. 2 AND 3, DOCKET NOS. 50-361 and 50-362 (Continued)
II.
Closure Mechanism Failures:
Number of doors failing - 27, as follows:
Door Number Inoperable Operable AR-101 09/01 09/19 09/20 Work Pending FH2-101 09/06 09/27 09/28 Work Pending FH3-103 09/07 09/08 AR-104 09/07 09/10 AC-105 09/01 Work Pending AC-106 09/01 Work Pending FH3-207 09/17 09/19
^
FH2-302 09/01 Work Pending FH3-302 09/01 09/06 09/07 Work Pending AC-303 09/01 09/03 09/09 09/10 09/17 09/20 09/27 Work Pending FH2-303 09/01 09/27 09/28 Work Pending FH3-303 09/06 09/11 09/15 09/17 09/21 09/23 AC-305 09/04 09/10 09/11 09/19 09/21 09/22 09/23 09/26 AC-308 09/30 Work Pending AR-315 09/29 Work Pending AR-316 09/01 09/03 09/15 Work Pending AR-318 09/02 Work Pending AC-331 09/07 09/10 09/13 09/17 AC-345 09/01 09/03 09/05 09/06 09/08 09/10 09/11 09/19 09/21 09/22 09/23 Work Pending AC-348 09/05 09/06 09/08 09/10 09/11 09/13 09/14 09/19 09/21 09/22 09/26 Work Pending AC-349 09/08 09/09 09/17 09/18,.
ATTACHMENT SOUTHERN CALIFORNIA EDISON COMPANY INOPERABLE FIRE DOORS FOR THE MONTH OF SEPTEMBER 1983 SAN ONOFRE NUCLEAR GENERATING STATION UNITS NO. 2 AND 3, DOCKET NOS. 50-361 and 50-362 (Continued)
II.
Closure Mechanism Failures:
(Continued)
Door Number Inoperable Operable FH2-403 09/07 09/08 09/13 09/14 09/29 Work Pending FH3-403 09/01 Work Pending C2-404 09/30 Work Pending AC-415 09/01 09/10 09/11 09/19 09/20 Work Pending AC-442 09/08 09/10 09/12 09/19 09/20 09/22 s
09/23 09/26 09/27 Work Pending AR-501 09/01 Work Pending r
a b
ATTACHMENT SOUTHERN CALIFORNIA EDISON COMPANY INOPERABLE FIRE DOORS FOR THE MONTH OF SEPTEMBER 1983 SAN ONOFRE NUCLEAR GENERATING STATION UNITS NO. 2 AND 3, DOCKET NOS. 50-361 and 50-362 (Continued)
III.
Doors Blocked Open:
Number of doors failing - 19, as follows:
Door Number Inoperable Operable FH2-103 09/05 09/07 AC-109 09/29 Work in Progress AC-257 09/13 09/14 AC-258 09/02 09/03 AC-259 09/01 Work in Progress AC-260 09/01 Work in Progress AC-304 09/01 09/10 09/12 09/18 AR-312 09/01 09/03 09/06 09/07 09/09 09/10 09/11 09/13 09/15 09/16 09/19 09/20 09/21 09/24 AR-313 09/28 09/30 AR-314 09/06 09/10 AR-315 09/07 09/09 09/12 09/16 09/20 09/21 AC-319 09/03 09/04 09/13 09/14 09/17 09/18 AC-351 09/01 09/06 AC-402 09/30 Work in Progess FH3-403 09/01 09/03 AC-442 09/01 09/08 AR-509 09/01 09/05 09/07 09/10 AR-510 09/01 09/03 09/04 09/05 09/06 09/08 09/13 09/17 1833u