ML20207H125

PNO-77-210:on 771122,licensee Reported Failure of B Reactor Building Cooling Fan.Plant Placed in Hot Shutdown within 36 Hours.Licensee to Replace Fan

ML20207H125
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/23/1977
From:	Klingler F, Sniezek J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-77-210, NUDOCS 9903120246
Download: ML20207H125 (1)

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PRELIMINARY NOTIFICATION .

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November 23, in77 '

PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCUR

< This preliminary notification constitutes EARLY notice of an event of POSSIBLE safety or public interest significance. The information i presented is as initially received without verification or evaluation and is basically all that is known by IE staff on this date, t

' Facility: Arkansas Nuclear One-Unit No.1

,- P (DN50-313) Arkansas Power and Light t

Subject:

FAILURE OF REACTOR BUILDING COOLING FANS q > l The licensee reported the failure of the "B" Reactor Building Cooling Fan on November 22, 1977. The "A" fan had failed earlier on June 2, 1977 (LER 50-313/ 77-13).

does not meet the Facility Technical Specification, LCO 3.3.4, requires two fans powered from independent buses, since the remaining two Reactor Building Cooling Fans, "C&D" are powered from the same bus "B6."

In accordance with Facility Technical Specification, LCO 3.3.6, the plant will be placed in a hot shutdown within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The plant will remain shutdown for approximately 10 days. Plans include replacement of one of the two failed fans. i I

E94i W The licensee does' not plan to make a press release. ~ '~

I RIV received notification regarding the fan failure 'ta 3:30 p.m. on November 22, 1977, from 1

ANO-Unit No. 1.

'the / Assistant Plant Superintendent, rontact: FKlingler, IE x28019 JSniezek, IE x28019

_ Distribution: Transmitt'e d H St /j/3 Chainnan Hendrie Commissioner Bradford Commissioner Kennedy S. J. Chilk, SECY Commissioner Gilinsky C. C. Kammerer, CA (For Distributit>n)

Transmitted: MNBB g ~.f ~

P Bldg // /7 E. Volgenau IE L. V. Gossick, EDO E. G. C'ase,' NP.R S. H. Hanauer, EDO Regiong, / i AO }

J. J. Fouchard, PA SS Bldg / l /Cf O \ ,

R. Hartfield, MIPC (MAIL) i

' C. V. Smith, NMSS P.. J. McTiernan, 0IA '

R. G. Ryan, OSP ,

H. K. Shapar ELD R. Minogue, SD

[,F PRELI,MINARY NOTIFICATION

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9903120 46 77U23 210 PDR l

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