DCL-84-042, Ro:On 831230,conduit Installed Through Fire Barrier Wall in Cable Spreading Room.On 840107,four Fire Doors Removed & Replaced W/Heavy Duty Fire Doors.On 840109,fire Barrier Penetrations Nonfunctional Due to Mods

Ro:On 831230,conduit Installed Through Fire Barrier Wall in Cable Spreading Room.On 840107,four Fire Doors Removed & Replaced W/Heavy Duty Fire Doors.On 840109,fire Barrier Penetrations Nonfunctional Due to Mods

ML20080K274
Person / Time
Site:	Diablo Canyon
Issue date:	02/06/1984
From:	Shiffer J PACIFIC GAS & ELECTRIC CO.
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
DCL-84-042, DCL-84-42, NUDOCS 8402150356
Download: ML20080K274 (2)

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PACIFIC OAS .d N D E L E C T RIC C O M PANY P(37W3 l 77 BEALE STREET SAN FRANCIS ;O, CALIFORMA 94106- (415) 781-4211

• TWX 910-372-6667 JAMESD SHIFFER DEPARTMEM 08 NUCLEAR PLANT OPERATONS NUCLEAR POWER GENERATON February 6, 1984 '

PGandE Letter No.: DCL-84-042 fir. John B. Ilartin, Regional Administrator U. S. Nuclear Regulatory Commission, Region V 1450 1laria 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, SR 84-01

Dear 11r. !!artin:

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

On December 30, 1983, installation of a conduit through a fire barrier wall in the cable spreading room rendered the fire barrier non-functional. The work was completed and the fire barrier declared functional on' January 7, 1984.

Four (4) fire doors were removed on January 7, 1984, and replaced with heavy duty pressure fire doors. The replacement was completed on January 26, 1984.

On January 9, 1984, duriag the removal and modification of the main steam line whip restraints, six (6) fire barrier penetrations were made non-functional.

The fire barrier penetrations will be restored prior to heat-up of the Reactor Coolant Systeu.

Additionally, on January 16, 1984, construction crews removed a fire door and frame to repair a mount bolt. The frame has been replaced and sealed with fire retardant caulking.

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m M 0. Mr., J. B. liartin PGandE Letter ho.: DCL-84-042

- February 6, 1964 Page Two In accordance with Technical Specification-3.7.10a, fire watches or patrols were established for each case within one our. Specification 3.7.10a requires submittal of this Special P.epor . s the fire barriers remained

- non-functional for greater than seven (7.1 days.

These conditions have in no way affected the public's health and safety.

Sincerely, ._ _

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cc: G. W. Knighton Director, Office of llanagement Information and Program Control Service List 1

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