ML20064K113
| 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) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANCCCA. ?ENN ESSEE 37401 e
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 The aneland sparial report provides informarina conearning the fire k'
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
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J. 1. Calhova Directer of 3=elaar Power l
2aalosure (3) cs (Zacloeurs):
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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
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U.S. Emelaar Eagulatory Caumisaios
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m =h4=ttom. DC 20555 Mr. Sill Lavallas Puciaar Safeey Analysis /*==eme Pale Alto, california 94303 g
mr. v. T. Cottia, sic to.peetor, ses.oyah S
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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.
thermal da:ector in place of an ionization detec:or. This detector is located l
in :ene 214 protecting the =echanical equip =ent room on elevatten 732 in the control buildin6 The thermal detector would have detected a fira in this location once :e:peratures 1
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 085904 was initiated and the proper detector type was'?.estalled. The systa=
s vi-declared operable on August 5, 1980.
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