05000324/LER-1981-105-03, /03L-0:on 811004,suppression Chamber Water Level Indicator on Remote Shutdown Panel Indicated Erroneous Level Reading.Caused by Transmitter Out of Calibr Due to Change in Trickle Flow.Trickle Flow Adjusted

/03L-0:on 811004,suppression Chamber Water Level Indicator on Remote Shutdown Panel Indicated Erroneous Level Reading.Caused by Transmitter Out of Calibr Due to Change in Trickle Flow.Trickle Flow Adjusted

ML20011A890
Person / Time
Site:	Brunswick
Issue date:	10/22/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20011A886	List: 05000324/LER-1981-105, Forwards LER 81-105/03L-0 05000324/LER-1981-105-03, /03L-0:on 811004,suppression Chamber Water Level Indicator on Remote Shutdown Panel Indicated Erroneous Level Reading.Caused by Transmitter Out of Calibr Due to Change in Trickle Flow.Trickle Flow Adjusted
References
LER-81-105-03L, LER-81-105-3L, NUDOCS 8111030326
Download: ML20011A890 (2)

LER-1981-105, /03L-0:on 811004,suppression Chamber Water Level Indicator on Remote Shutdown Panel Indicated Erroneous Level Reading.Caused by Transmitter Out of Calibr Due to Change in Trickle Flow.Trickle Flow Adjusted

Event date:
Report date:
3241981105R03 - NRC Website

text

NRC FORM 366 U.S. NUCLEAR REGULAT@RY COMMISSION (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l

l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) a 1

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8 60 61 DOCK ET NUMBER 68 69 EVENT DATE 74 75 REPORT CATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES l O 12 l l During routine surveillance it was d scovered that suppression chamber water level l

l indicator, 2-CAC-LI-3342, located on the Remote Shutdown Panel, indicated a level of l g 3 l -24".

The other suppression chamber water level indicators, located in the Control l

g,

Room, indicated a level of -29".

This event did not affect the health and safety l

o 3 g l of the public.

l 0 6 l

10171 I Technical Specifications 3.3.5.2, 6.9.1.9b l

i O 18 l l 7

8 9 DE CODE SU8C E COMPONENT CODE SU8 CODE SU E

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10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LER EVENT YE AR REPORT NO.

CODE 1YPE N O, O a g.RO 18 11 l l-l 11 lo is l W

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS li 101 l A channe in trickle flow to the wet reference Inc nf cho indienene ernnemirror l

,,,,, [2-CAC-LT-3342, model No. 1152, caused the transmitter to be out of calibration. The l

trickle flow was properly established, the transmitter was calibrated and the indicatoy was returned to service.

Plant modification 80-78 has been developed to eliminate l

further similar events.

Installation is scheduled for the next refueling outage.

y 80 7

8 9 ST S

'Ib POWER OTHEst STATUS IS Q RY DISCOVERY DESCRIPTION NA l l Al@l Operator Surveillance W@ 1015 l1 l@l l

1 5 ACTIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELE ASE l

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8 9 10 tt 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

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'2 PERSONNE L IN;URiES DESCRIPTION @

NUMBE R l

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LOSS OF OR DAMA3E TO F ACillTV TYPE

DESCRIPTION

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NRC USE ONLY Q

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8 9-10 NAME OF PREPARER PHONE:

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LER ATTACHMENT - RO #2-81-105-Facility: BSEP. Unit No. 2 Event Date:

10/4/81 As a result of similar events involving this type of instrumentation.and post-TMI requirements, a plant modification package (80-79 for Unit No.1 and 80-78 for Unit N?,.

2) has been developed. ' This modification will install a condensing pot in the reference leg in order to increase the accuracy and reliability' cf these inst uments, and r ;;;iove the requirement to have flow in the reference leg to asure that it is full.

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