ML20054G235

RO 82-014:on 820604,addl Inoperable Fire Barrier Penetration Seals W/Inadequate Compensatory Measures Reported by Contractor to Util.Mastic Coating Seals Installed Where Refractory Blankets Butt Against Barriers

ML20054G235
Person / Time
Site:	San Onofre
Issue date:	06/07/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
RO-82-014, RO-82-14, NUDOCS 8206210303
Download: ML20054G235 (2)

Text

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Southern California Edison Company 197 yy __ z S AN CNOFRE NUCLE A R GENER A TING ST A TION (*

P.O. B O K 120 S AN C LEMEN TE. C ALIFORN84 92672 8e [ ,,,

H. B. H A Y 1 s t e p++o e u A,.oN N A N A., June 7,1982 ,,,,,,,,,,,,

U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5368 Attention: Mr. R. H. Engelken, Regional Administrator

Subject:

Docket No. 50-361 Licensee Event Report No.82-014 San Onofre Nuclear Generating Station, Unit 2

Reference:

(a) Letter, H.B. Ray (SCE) to R.H. Engelken (NRC) dated May 14,1982 - Special Report, Inoperable Fire Rated Assemblies In accordance with Technical Specification 6.9.1.12.b, this letter confirms our prompt notification of your office by telephone on June 4, 1982, of a reportable occurrence involving the discovery of additional inoperable fire barrier penetration seals, beyond those addressed in Reference (a), for which inadequate compensatory measures had been esta bl ished.

On June 4,1982, a listing of improperly sealed refractory blankets on

! cable tray penetrations of fire barriers was provided to SCE by the contractor. It was determined that the fire watches that had been established in accordance with the Action Statement associated with Limiting Condition for Operation 3.7.9 for those inoperable fire rated assemblies addressed in Reference (a) did not provide adequate compensa-tory measures for fire protection in these additional areas.

Area fire detectors were confirmed to be operable and fire watches were posted as necessary. Corrective action to install the mastic coating seals where the refractory blankets butt against the fire barriers was commenced and the additional inoperable fire barrier seals were incorpo-rated into the compensatory fire protection program delineated in the Reference (a) Special Report.

The scheduled update of the Reference (a) Special Report will be issued on June 11, 1982, and will constitute the 14-day follow-up report to this prompt notification as required by Section 6.9.1.12 of the L' .it 2 TbN Technical Specifications.

e206210303 820607 DRADOCK05000g

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r-Mr. R. H. Engelken June 7,1982 A completed LER form addressing the discovery of these additional inoperable seals will be provided with that update. If there are any questions regarding the above, please contact me.

Sincerely, A.

cc: A.E. Chaffee (USNRC Resident Inspector, San Onofre, Unit 2)