ML20028A889

LER 82-021/01T-0:on 821101,during Source check,3A Reactor Vent Stack Radiation Monitor Determined Insensitive.Caused by Drift in Instrument Voltage Plateau.Instrument Realigned & Returned to Svc on 821102

ML20028A889
Person / Time
Site:	Peach Bottom
Issue date:	11/15/1982
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20028A885	List: ML20028A884 ML20028A889
References
LER-82-021-01T, LER-82-21-1T, NUDOCS 8211290174
Download: ML20028A889 (1)

Text

____- ____ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

CDRC FORas aos u. an eson.t.. .. e t . * . .

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. . Unit,,3 LICENSEE EVENT REPORT Report No. 3-82-021-01/T-0 CONTROi. sLOCie I I i

!4Q wuAgg mMY OR TYPE ALL REQUIRED INFORMAllON:

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-l 01217 18 l@l 11110 DOCICET MuuSER # 8B l1 l 8 l 2 l@l1 l 1l1 l 5 l 8 l 2 l(4 EVENT DATE F4 7S REPORT O AT E Rd EVENT OESCRIPTION AND PPOSASLE CONSEOUENCES h M IUhile at power, it was determined during a source check that the _ _ _j o l3A Reactor Building vent stack radiation monitor was insensitive. The _j l 014 j l3B monitor was operable at this time; however, it had out of service j lo [s] l for repairs prior to the discovery. The 3A monitor was known to be l 0 e loperable 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> before the event. During this period, load was l o i Istable and releases were essentially background (less than 0.1 percent l oa lof tech spec. limit). l

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SEQUENTI AL OCCURRENCE

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AK N AC o T A HOURS 27 5 i F t 9. L MAN F CTUREH l @ @ 3 l i I i @ @ @ lLilI815l@

l CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l3 a l Investigation determined that there was drift in the instrument l i i l voltage plateau which led to the reduced sensitivity. The instrument i g gwas realigned to provide the correct voltage plaueau successfully l l

, 3 l source checked and returned to service on November 2. l i 4 1 1

i e , no ST  % POWER ATUS 50 Y plSCOVERY DESCRtPTION i ,,

g g l0 l 9l9 lgl OTHER N S/A l gg Surveillance Test l

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PERSONNEL EXPOSURES y l 0'j""0'l"0 g"C"'"' N/A

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N/A 1 H eg l0luM0iRl gg n 0 l@l DESCRIPTION @ so I

8211290174 821115 i

L Oss Os OH oAMAGE TO F ACluTY n TYPE CESCRIP TION U PDR ADOCK 05000278 i s

8 Lz_l@l 7 8 9 to eda I PUSLICITY NRC USE ONLY d Yffh_

es DESCRIPTION

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(215) 841-5020