ML20064K113

Special Rept 80-5:on 800804,fire Detector XS-13-29F Found to Have Thermal Detector in Place of Ionization Detector. Caused by Installation of Wrong Type of Detector.Correct Detector Installed.Sys Declared Operable on 800805

ML20064K113
Person / Time
Site:	Sequoyah
Issue date:	09/25/1980
From:	Calhoun J TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 8009300451
Download: ML20064K113 (2)

Text

_

t'

~

TENNESSEE VALLEY AUTHORITY e

CH ATTANCCCA. ?ENN ESSEE 37401 1754 Chastant straat Tower II September 25, 1980 Mr. James P. O'Imilly, Director U.S. Muslaar Eagulatory -4--*m Offica of Inspectica and Enforcement Eagion II 101 Mariatta street, suita 3100 Atlanta, Georgia 30303 Daar Mr. O'Emilly:

T""m'r2 7ALLET AUT30EITY - SEQUOTAE NUCLEAR PLurr UNIT 1 - D00EET

30. FACILITT CPZEATIE LICDISE DPR SPECIAL EI?CEI 30-5 k' The aneland sparial report provides informarina conearning the fire detection instrumentatica system. Ihis report is submittad in accordance with Sequoyan unit 1 T=h=4a=1 3pecificatica 3.3.3.3.

Very truly yours, N93EE VALLaT ETB02ITY f

) J. 1. Calhova Directer of 3=elaar Power l

2aalosure (3)

/~^

cs (Zacloeurs):

Directar (3)

_ offies of u===g - - t Information and Program Control U.S. Eualear Eagulatory t'a==4 ma%

m-hiara , DC 20553 Director (40)

Offica of Inspection and Enforsement \

U.S. Emelaar Eagulatory Caumisaios \

m =h4=ttom. DC 20555 '

Mr. Sill Lavallas Puciaar Safeey Analysis /*==eme Pale Alto, california 94303 mr. v. T. Cottia, sic to.peetor, ses.oyah gS

//

8009300 M S . =" ~'

- ' " =

e

{ .

L Special Report 80-5 Sequoyah Nuclear Plant Unit 1 Fire Detec:ica Instru=entation System Plant Status Mode 4 Reactor Pressure 370 psig

- Reactor Te=perature 300 Degrees F Event Description and Probable Consecuences On August 4,1980, during the Q.A. review of Surveillance Instruction 234.1, which was performed on July 14, 1980, detector 15-13-297 was found :o have c.

l thermal da:ector in place of an ionization detec:or. This detector is located in :ene 214 protecting the =echanical equip =ent room on elevatten 732 in the control buildin6 '

1 The thermal detector would have detected a fira in this location once :e:peratures ,

reached detector set point. Other ionization type detectors in the area would have operated as designed thereby =1"4-4:ing any effect the :hermal detector '

=ay have had.

Cause Descriotion and Corrective Action The wrong :ype detector was installed by construction. Maintenance request s 085904 was initiated and the proper detector type was'?.estalled. The systa=

vi- declared operable on August 5, 1980. .

4 s

l w

i

• --w- n ,w ,

, , . . , , _ _ , _ _ . _ . _