05000220/LER-1981-042-04, /04T-0:on 810831,during Weekly Environ Radiation Monitor Insp,Only Six Monitors Found Functioning Due to Defective Power Supply Units.Cause Unknown.Portable Monitor Installed

/04T-0:on 810831,during Weekly Environ Radiation Monitor Insp,Only Six Monitors Found Functioning Due to Defective Power Supply Units.Cause Unknown.Portable Monitor Installed

ML20010G693
Person / Time
Site:	Nine Mile Point
Issue date:	09/10/1981
From:	Randall R NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20010G689	List: 05000220/LER-1981-042, Forwards LER 81-042/04T-0 05000220/LER-1981-042-04, /04T-0:on 810831,during Weekly Environ Radiation Monitor Insp,Only Six Monitors Found Functioning Due to Defective Power Supply Units.Cause Unknown.Portable Monitor Installed
References
LER-81-042-04T, LER-81-42-4T, NUDOCS 8109220415
Download: ML20010G693 (1)

LER-1981-042, /04T-0:on 810831,during Weekly Environ Radiation Monitor Insp,Only Six Monitors Found Functioning Due to Defective Power Supply Units.Cause Unknown.Portable Monitor Installed

Event date:
Report date:
2201981042R04 - NRC Website

text

f N RC F O R M 366

00. 6. EUCEE AR R EGUL'A9@CN N

~

~

(7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l lh (PLEASE PRINT GR TYPE ALL REIUIRED INFIRMAUO%

1 6

j lo lil I N l Y lN lM lP l1 l 0 l0 l-l0 l0 l0 l0 l0 f p p l@l4l1 p p p l@l l

lg 7

8 9 LICENSEE CODE 14 tb LICENSE NUMBER 26 26 LICENSE TYPE JO 67 CAT 68 1

C ON'T j

101i1

%"RM I L ]@l 0 l 5 l0 j 0 l0 l2 12 l0 @l0l8l3l] I 8 l1 l@l l9 l (, l 0 l8 h l@

,j 7

8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 76 REPORT OATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I

lo l2l lDuring a weekly environmental radiation monitor surveillance inspection. it was found I

}

lOl3l lthat only six monitors were functioning.

Environmental tech specs require a minimum I

~

g g pf seven. Of the total of ten runitors, four failed over a three day period.

All l

lOlsl ponitors had been functioning at the previous weekly check. There were ao adverse 1

lO is l ponsequences due to this esent.

I Fl 77 I l

I 10181l SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE -

CODE SU8 CODE-COMPONENT CODE-SU8 CODE - SUSCODE -

IOTTI IR I3 l@ U@ Ld@ It IN ls Ir la in l@ W@ W @

7 8

9 10 11 12 13 18 19 20 SEQUE NTI AL OCCUR R E NCE REPORT REVISION LER RO EVENT YE AR REPORT NO.

CODE TYPE N O.

@ sgg I 81 1J L_1 10l4l2l l./l l0l4l [TJ

(-j l0 I a

_ 21 22 23 24 26 27 28 29 30 31 32 K N 'A O

ON PL T ET D HOURS S8 BT FOR9 B.

SUPPLIE MANUFACTURER l B l@l Zl@

lZ l@

W@

l0l0l0l0l J@

l N ]@

W@

l G l 0 l 8 l 0 l{2q 33 34 35 36 3

40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l1 l0l IEhe cause of this occurence was defective power supply units.

The reason four out of I

l i l i l ken monitors suffered power supply failures is unknown.

A portable monitor was l

l3 l7l l installed the following day to place the site in compliance with environmental tech l

l Iil3l ppecs.

I It 1411 80 7

8 9 STA S

% POWER OTHE R STATUS ISCOw RY DISCOVERY DESCRIPTION NA l

W @l SURVEILLANCE TEST l

l1 l 5 l l E l@ l 1l 0l 0l@l ACTIVITY CC TENT RELE ASEO OF RELE ASE AVOUNT 05 ACTIVITY LOCATION OF RELEASE NA l

l NA l

l1 l6l[Zj h y gl 7

8 9 to 11 44 45 80 PERSONNEL E KPOSURES Nt ivB E R TYPE

DESCRIPTION

NA j

l3 l 7 l l0 l0 p l@l Z l@l PERSONNEL INJURIES NUVBER

DESCRIPTION

NA l

ITT l l o l o l o l@l 80 7

8 9 11 12 LOSS OF OR DAMAGE TO F ACILtTY TYPE DISCRIPTION NA l

li 191 O@l Pu8ti$TY 810922041S 810910 NRC USE ONLY DESCRIPTIONb PDR ADOCK 05000220 ISSUE NA s PDR l

lllllllllllllj l2l0l hl 68 69 80 &

8 9 TO Robert Randall (315)343-2110 1596 o

NAME OF PREPARER PHONE:

7,