05000324/LER-1981-011-03, /03L-0:on 810120 & 0123,actual Pool Level Determined in Excess of Upper Tech Spec Limit.Caused by Improper Calibr Data & Calibr Procedure Inadequacy.Procedure Revision Underway & Indicators Correctly Calibr

/03L-0:on 810120 & 0123,actual Pool Level Determined in Excess of Upper Tech Spec Limit.Caused by Improper Calibr Data & Calibr Procedure Inadequacy.Procedure Revision Underway & Indicators Correctly Calibr

ML19351G565
Person / Time
Site:	Brunswick
Issue date:	02/19/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19351G564	List: 05000324/LER-1981-011, Forewards LER 81-011/03L-0 05000324/LER-1981-011-03, /03L-0:on 810120 & 0123,actual Pool Level Determined in Excess of Upper Tech Spec Limit.Caused by Improper Calibr Data & Calibr Procedure Inadequacy.Procedure Revision Underway & Indicators Correctly Calibr
References
LER-81-011-03L, LER-81-11-3L, NUDOCS 8102250249
Download: ML19351G565 (1)

LER-1981-011, /03L-0:on 810120 & 0123,actual Pool Level Determined in Excess of Upper Tech Spec Limit.Caused by Improper Calibr Data & Calibr Procedure Inadequacy.Procedure Revision Underway & Indicators Correctly Calibr

Event date:
Report date:
3241981011R03 - NRC Website

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DEPORT DATE WJ EVENT OESCRIPTION AND PROBA9tE CONSEGUENCES h lol2l lUhile investigating a discrepancy between different indications of suppression pool l

l evel, it was deternined that the actual pool level exceeded the upper technical speci ;

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Inl4llfications limit with the highest recorded level being -26."

On January 23, 1981, this l lo13I levent occurred again.

In each case following the discovery of the high level, it was l l o is i treturned to within specifications. Neither of these events affected the health or

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.l i j o l IImproper calibration data for level indicators, 2-CAC-LI-2601 and 2602, caused both l

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ltigation af ter the second event revealed a calibration procedure inadequacy fr.

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LER ATTACID:EST - PD 2-d1-11 Facility: BSEP Unit No. 2 Event Date:

1-20-81 Following planned maintenance on several suppression pool icvel instrunents, it was discovered while doing a partial loop calibration, according to plant maintenance instructions, that the electronic loading ef f ect of a 250 cha resistor in the input to the signal converter in each of these indicators was not considered in the procedure. The appropriate maintenance instructions are now being revis.gd to account for this loading effect, whenever a par ial instrument loop calibration is done.

The procedure for performing the true loop calibration, performed as required by technical specifications, already conpensates for this loading effect caused by this resistor, therefere no problems are encount'ered by performing this procedure.

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