ML20126D296

Special Rept:On 921124,7-day SR of Updated FSAR Exceeded to Implement Work Activities on Quench Spray Pump House.On 921203,gaps Discovered in Fire Barrier Foam Matl Around Pipes.Fire Watch Established Until Mods Completed on 921214

ML20126D296
Person / Time
Site:	North Anna
Issue date:	12/22/1992
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
92-804, NUDOCS 9212240127
Download: ML20126D296 (2)

Text

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y.R VInoINIA ELECTHIC AND Powen COMPANY RICHMOND, VIRGINIA 23201 December 22, 1992 1

U.S. Nuclear Regulatory Commission Serial No.92-804 Attention: Document Control Desk MPW/EJW Washington, D.C. 20555 Docket Nos. 50-338 '

50-339 License Nos. NPF-4

- NPF-7.

Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 & 2 PENETRATION FIRE BARRIERS INOPERABLE SPJ.QlAL REPORT Pursuant to Updated Final Safety Analysis Report (UFSAR) Technical Requirement 16.2.1.3.B.2.2, e Special Report is hereby submitted because five penetration fire-barriers were not restored to a functional condition within seven days.- Two Unit 1 and three Unit 2 penetration fire barriers between the Quench Spray Pump House and-Auxiliary Building were breached to implement work associated with a design change modification.

On November 24, 1992, marinite.' boards covering penetration fire barriers were removed in the Quench Spray Pump House to implement work' activities associated with a design change package.' A fire watch was established upon removal of the marinite boards to satisfy the technical requirement actions. At approximately 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> on December 1,1992, the'seven day surveillance _ requirement of UFSAR, Section 16.2.1.3.B.2.1 for penetration fire barrier inoperability was exceeded when the fire barriers were not restored to functional status. -

Additionally, on December 3,1992, when the marinite boards were removed from-these penetrations in the Auxiliary _ Building, gaps were discovered in the fire barrier foam material around the pipes.- The cause of the gaps appears to be shrinkage of the'

- fire barrier foam. material over time. The fire watch, previously-established on November 24L 1992, continued until mcdifications were completed. The activities ~

were completed and the penetration fire barrier were returned to operabie status on December 14,1992.

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9212240127 921222 PDR

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This Special Report has been reviewed by the Station Nuclear Safety and Operating Committee and will be provided to the Management Safety Rev'.ew Committee.

Should you have any questions regard ng this report, please contact us.

Very truly yours,

,/ '.  !.

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W. L. Stewart Senior Vice President - Nuclear cc: U.S. Nuclear Ragulatory Commission Region il 101 Marietta Street, N.W.

Suite 2900 Atlanta, Georgia 30323 Mr. M. S. Lesser NRC Senior Resident inspector North Anna Power Station p

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