05000324/LER-1980-049-03, During High Drywall Pressure Channel Calibr & Functional Test,Pressure Switch Actuation Found Out of Tolerance.Caused by Instrument Drift. Switch Recalibr & PT 1.1.3PC Completed Satisfactorily

During High Drywall Pressure Channel Calibr & Functional Test,Pressure Switch Actuation Found Out of Tolerance.Caused by Instrument Drift. Switch Recalibr & PT 1.1.3PC Completed Satisfactorily

ML19344A423
Person / Time
Site:	Brunswick
Issue date:	08/12/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19344A410	List:
References
LER-80-049-03L, LER-80-49-3L, NUDOCS 8008200273
Download: ML19344A423 (1)

LER-1980-049, During High Drywall Pressure Channel Calibr & Functional Test,Pressure Switch Actuation Found Out of Tolerance.Caused by Instrument Drift. Switch Recalibr & PT 1.1.3PC Completed Satisfactorily

Event date:
Report date:
3241980049R03 - NRC Website

text

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UPDATE REPORT LICENSEE EVENT REPORT PREVIOUS REPORT DATE 7-17-80 CONTROL BLOCK: [l l

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8 60 61 OOCK ET NUMSEM 6a 69 EVENT OATE 74 75 REPORT OATE 80 EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h l 0121 l During the performance of High Drywell Pressure Channel Calibration and Functional l

lT751 l Test, PT 1.1.3PC. I&C Technicians found pressure switch 2-C72-PS-N002B, model l

f7TTl Inumber 12N-AA4-X10TT, actuating out of tolerance.

The switch actuated at 56.3 l

l inches of water applied while the reportable limit is greater than 55.36 inches l

0 5 [TTsl I of water applied. The event did not affect the health or safety of the public.

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l i l 0 l l Instrument drift caused the pressure switch to be out of tolerance.

The switch was re-1 l calibrated and PT 1.1.3PC was completed satisfactorilv.

A review of the m st tvn mr I i

l history of this nodel oressure switch showed no unusuni or reportable characteristics: I i 2 y ltherefore, this is considered an isolated event with no further action recuired.

I y l These switches are functionally tested monthlv and calibrated everv three nenths.

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'a A. C. Tollison, Jr.

PHONE:

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