ML20127B294

Special Rept:On 850508,ventilation Duct Fire Penetration in Reactor Bldg Track Bay Wall Found Unequipped W/Fire Damper, Per Tech Spec 3.6.10.1.Hourly Fire Watch Patrols Established.Reevaluating Fire Design

ML20127B294
Person / Time
Site:	Nine Mile Point
Issue date:	06/05/1985
From:	Lempges T, Randall R NIAGARA MOHAWK POWER CORP.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NMP-12058, NUDOCS 8506210409
Download: ML20127B294 (3)

Text

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' June 5,1985 Dr. Thomas E. Murley Regional Administrator United States Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, PA 19406 RE: Docket No. 50-220 SPECIAL REPORT Gentlemen:

In accordance with Technical Specification 3.6.10.1, we hereby submit the following Special Report concerning fire barrier penetrations.

Very truly yours, W4 Thomas E. Lempges

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Vice President Nuclear Generation TEL/PC/lo ,

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LICENSEE EVENT REPORT (LER)

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NINE b!ILE POINT UNIT I oisIolol012 l2l0 1 lOFl0 l 2 titte iA.

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l l l ABSTRACT It was identified on Flay 8, 1985, that a ventilation duct fire penetration in the Reactor Bldg. Track Bay wall is not equipped with a fire damper. The penetration was declared inoperabic in comptinnec with Tech. Spec. 3.6.10.1 (Fire Barrier Penetrations). Fire watch patrols have been established in accordance with the Tech. Spec. to perform hourly inspections until the situation is corrected. Tech.

Spec. 3.6.10.1.d requires that a special report be submitted to the NRC for fire barrier penetrations which are non-functional for more than 14 days.

A Fire Protection Desf gn Package is being formulated to address various technical deficiencies in tht firo protection features at Nine bilic Unit 1. The design package will incluuc rhis fire damper for installation, e

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NAC Form 3e4A U S. NUCLE AA REGULATOAV COMMIS$10N LICENSEE EVENT REPORT (LER) TEXT CONTINUATCN AreRovio ove so. siso-oio4

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P ACILITV NAMS (il DOCKET NUMBER 421 LER NUMBER (6) PAGE 13)

NINE MILE POINT UNIT I

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.axym N=.. < ,macrom,mw.,im TEXT On May 8,1985 it was discovered that a duct penetration through a fire rated wall in the Reactor Bldg. Track Bay is not equipped with a fire damper. The penetration was declared inoperable in accordance with Tech. Spec. 3.6.10.1, which requires that non-functional fire barrier penetrations are restored to functional status within 14 days, or a report shall be prepared and submitted in accordance with 6.9.2.b.

CORRECTIVE ACTIONS According to the NMPC Fire Protection Engineer, a Fire Protection Design Package is being formulated to address various technical deficiencies in the fire protection features at Nine Mile Unit 1. The design package will include this fire damper for installation.

The new damper installation is presently scheduled for completion in late 1985. In accordance with Tech. Spec. 3.6.10.1.c, hourly fire watch patrol was established for the identified duct penetrations not equipped with fire dampers. The fire watch patrol will be maintained until the dampers are installed.

ASSESSMENT _0F SAFETY _ CONSEQUENCES Because fire watch patrols have been established and will be maintained in accordance with Tech. Spec., no safety consequences have arisen as a result of this event. The fire watch patrols perform hourly inspections guarding against fire while the penetration is non-functional. The watches shall continue until the new damper is installed.

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