DCL-84-026, Ro:On 831215,fire Barrier Wall Between Containment Penetration Area & Auxiliary Bldg Removed.Wall Replaced W/Concrete Barrier for Addl Strength in Event of Steam Pipe Leak Prior to Operation

Ro:On 831215,fire Barrier Wall Between Containment Penetration Area & Auxiliary Bldg Removed.Wall Replaced W/Concrete Barrier for Addl Strength in Event of Steam Pipe Leak Prior to Operation

ML20080G609
Person / Time
Site:	Diablo Canyon
Issue date:	01/23/1984
From:	Schuyler J PACIFIC GAS & ELECTRIC CO.
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
DCL-84-026, DCL-84-26, NUDOCS 8402130477
Download: ML20080G609 (1)

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" flE PACIF'IC CrA S AND ELECTR,IC C O M PANY IP G wiE i 77 scate sincer san enAncis , cNohska /4ScEF.F415) 781-4211 . TWX 910-372-6587 J.O.SCHUYLER ,, ,,,,,

mu222.C. January '23, '1984 PGandE Letter No: DCL-84-026 Mr. John B. Martin, Regional Administrator U. S. Nuclear Regulatory Commission, Region V 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596-5368 Re: Docket No. 50-275, OL-DPR-76 Diablo Canyon Unit 1 Special Report on Non-Functional Fire Barriers

Dear Mr. Martin:

Pursuant to Section 6.9.2 of Appendix A of the Diablo Canyon Unit 1 Operating License, and as specifically required by Technical Specification 3.7.10, this Special Report is submitted concerning two fire barriers in safety-related areas being non-functional for greater than seven (7) days.

On December 15, 1983, construction crews began removing a fire barrier wall between the containment penetration area and the auxiliary building. This wall is being replaced by a concrete barrier for additional strength in the event of a steam pipe leak. The concrete tire barrier will be completed prior to plant operation above 5% power.

Also, on December 19, 1983, work was begun to add additional heat tracing to pipes penetrating the ceiling of the Boron Injection Tank Room. This rendered a second fire barrier penetration non-functional. This fire barrier will also be restored prior to plant operation above 5% power.

In accordance with Tech Spec 3.7.10a fire patrols were established for both cases within one hour. Specification 3.7.10a also requires submittal of this Special Report, as the fire barriers remained non-functional for greater than seven (7) days.

These conditions have in no w&y affected the public's health and safety.

Sincerely, 8402130477 840123 -

/

DR ADOCK 05000 'j.

J. O. Schuyi r cc: G. W. Knighton Director, Office of Management, ' +'rmation and Program Control

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