05000325/LER-1981-018-03, /03L-0:on 810302,during Testing,Low Level Switch 1-B21-LIS-N031B-2 Would Not Actuate.Caused by Set Screw Which Secures Instrument Indicator Needle to Actuator Shift Coming Loose & Attaching Itself to Switch Operating Magnet

/03L-0:on 810302,during Testing,Low Level Switch 1-B21-LIS-N031B-2 Would Not Actuate.Caused by Set Screw Which Secures Instrument Indicator Needle to Actuator Shift Coming Loose & Attaching Itself to Switch Operating Magnet

ML19345G574
Person / Time
Site:	Brunswick
Issue date:	03/31/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345G571	List: 05000325/LER-1981-018, Forwards LER 81-018/03L-0 05000325/LER-1981-018-03, /03L-0:on 810302,during Testing,Low Level Switch 1-B21-LIS-N031B-2 Would Not Actuate.Caused by Set Screw Which Secures Instrument Indicator Needle to Actuator Shift Coming Loose & Attaching Itself to Switch Operating Magnet
References
LER-81-018-03L-01, LER-81-18-3L-1, NUDOCS 8104070544
Download: ML19345G574 (2)

LER-1981-018, /03L-0:on 810302,during Testing,Low Level Switch 1-B21-LIS-N031B-2 Would Not Actuate.Caused by Set Screw Which Secures Instrument Indicator Needle to Actuator Shift Coming Loose & Attaching Itself to Switch Operating Magnet

Event date:
Report date:
3251981018R03 - NRC Website

text

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I NAvr of ouEeAnen M. J Pastva-3r-PHONE:

p LER AITAC10!E.NT - RU #1-81-18 Facility: BSEP Unit No.1 Event Date: 3-2-81 An historical review of all plant Yarway type instrumentation has shown that this is not a reoccut -ing problem. Several instruments have had an isolated case of set screws comrtg loose causing the instrument to be inoperable, but no trend has been establis."ed.

This type instrumentation is presently being ceplaced during outages of sufficient length with analog type instrumentation which will solve this mode of failure. Procedures are being revised to assure that these set screws are being

. checked during each calibration to assure that they are secure in place until the Yarway instruments are replaced. These procedures will be revised by April 30, 1981.

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