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Latest revision as of 11:34, 15 March 2020

LER 81-130/03L-0:on 810805,ionization Smoke Detector in Fire Zone 72 Failed Channel Functional Test.Caused by Deterioration of Integral Printed Circuitry Due to Boric Acid Deposits in Honeywell Detector,Type TC 100A
ML20010F756
Person / Time
Site: McGuire Duke Energy icon.png
Issue date: 09/01/1981
From: Nardoci P
DUKE POWER CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010F753 List:
References
LER-81-130-03L, LER-81-130-3L, NUDOCS 8109110292
Download: ML20010F756 (1)


Text

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a 48.c 7 Cane :44 U.s.NUCLsAA AtcuLATORY cceansessac8e (7 1' '.

UCENSEE EVENT REPCRT EXHl81T A ccaractaLocx.I I I  !  ! I  ! ipt.s. Ass *=ivr On Tvrt ALL macuento i=,cavanews i e@

l o i t l l N ! Cl Ml G[ Sl 1 F S 9 wCLgStd GOCE 1.

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'S j 0j0 p l 01 0l-l0;eq(4j1l1; 6 cans. msGLA .h 3 1l1;gltl OAl adgg 6CE.%S. r've. A

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> . E 1. @l0 l ..5 l 010101 m.r u 3I ..6 I 9 @(._0! . 810 I 518I o . 12. r. 1 @l01910

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11 811 l@..

avENr :sscaimen Ano racemaus cchsscuswers @

l a i 2 ! ! Whil e in mode 5, performance of a fire detection system semiannual test revea1 d 9

,3,3, i thatanionizationsmokedetectorinfirezone72(mechanicalpenetrationroom) i l

1.: ;.jlfailed its channel functional test (did not alarm when smoke was introduced), 9

,,,,, ,and subsequently was declared inoperable per T.S. 3.3.3.7 which is reportable

, , , , pursuant to T.S. 6.9.1.13(b). Since a technician was present in the affected

!,.,i; zone while the detector was known to be inoperable, and the 3 remaining detect-ors in the zone were operable, this incident had no effect on the health 6 setety

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a ccca :acs susccee  :: es. n ri.,c::,

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Ause sscawncs Ano ccassenvs ac :cus @

ti aifExamination of the detector (Honevuell, Type TC 100A) revealed deterioration of

,, ,,,;the integral printed circuitry due to boric acid deposits. The contamination ,

probably occurred during a testing phase of construction when leaks were dis-

,, ,;,gc cered and repaired as systems were pressurized. The detector was replaced anp r T:n I tested satisfactorily. i cri.emrrarus @ EiEIN T I7 s,ewea it i s i LX l@ l 0f 0) -Ogl Mode 5

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N/A @ I IIIIIIIIIIIi l

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Phillip B. Nardoci (704) 373-7432 8109110292 810901 PDR ADOCK 05000369 S PDR

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