05000325/LER-1980-045-03, /03L-0:on 800424,while Performing Reactor Low Water 2 & 3 Channel Calibr & Functional Check,Low Level & Pressure Switches Failed to Actuate.Caused by Instrument Drift.Switches Recalibr & Returned to Svc

/03L-0:on 800424,while Performing Reactor Low Water 2 & 3 Channel Calibr & Functional Check,Low Level & Pressure Switches Failed to Actuate.Caused by Instrument Drift.Switches Recalibr & Returned to Svc

ML19323F210
Person / Time
Site:	Brunswick
Issue date:	05/19/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19323F207	List: 05000325/LER-1980-045, Forwards LER 80-045/03L-0 05000325/LER-1980-045-03, /03L-0:on 800424,while Performing Reactor Low Water 2 & 3 Channel Calibr & Functional Check,Low Level & Pressure Switches Failed to Actuate.Caused by Instrument Drift.Switches Recalibr & Returned to Svc
References
LER-80-045-03L, NUDOCS 8005280655
Download: ML19323F210 (1)

LER-1980-045, /03L-0:on 800424,while Performing Reactor Low Water 2 & 3 Channel Calibr & Functional Check,Low Level & Pressure Switches Failed to Actuate.Caused by Instrument Drift.Switches Recalibr & Returned to Svc

Event date:
Report date:
3251980045R03 - NRC Website

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8 60 61 DOCK ET NUMS ER 68 69 EV ENT OATE 14 7S REPORT QATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h ITTT1 l While performing PT 3.1.7PC, Reactor Low Water No. 2 and 3 Channel Calibration and l

The report-l ITT~D l Functional Check, low level switch 1-B21-LITS-NO31A-2 failed to actuate.

Io i4 [ lable limit for this switch is >l94.63" water applied. Also, low pressure switch 1-B21-1 l LITS-NO31B-3 actuated at 121.1" water applied while the reportable limit is >117.18" l

lo ;5l 1o is l l water applied. The health and safety of the public were not affected by this event.

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LER ATTACHMENT - RO # 1-80-45 Facility: BSEP Unit No. 1 Event Date: 4-24-80 Tha I&C Technicians also found a loose locking screw that holds switch 2 of 1-B21-LITS-N031A in place. The loose screw could have allowed possible bumping and moving of the switch such that it would not actuate. Locking screws on both instruments were checked for tightness at the time and are presently checked quarterly.

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