05000325/LER-1982-053

LER 82-053/03L-0:on 820604,during startup,09 Position Found Superimposed on 00 RTGB Position Indication for Fully Inserted Control Rod 10-07.Caused by Defective Rod Position Reed Switch.Investigation Scheduled for 1982 Outage

ML20054M134
Person / Time
Site:	Brunswick
Issue date:	06/29/1982
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20042C746	List: 05000325/LER-1982-053 ML20042C745
References
LER-82-053-03L-01, LER-82-53-3L-1, NUDOCS 8207090288
Download: ML20054M134 (2)

LER-2082-053,

Event date:
Report date:
3252082053R00 - NRC Website

text

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D ATE 7 8 60 61 DOCKET NUYSER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h ITTT1 IDuring a reactor startup, it was discovered that the "09" position was superimposed on I During plant l goy 3y lthe "00" RTGB position indication for fully inserted control rod 10-07.

I o 4 l operation on 6-6-82, it was discovered that the " tens" digit for the RTGB position

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o 3 l indication of control rod 34-27 was inoperable for rod positions "10 through "19". l oo lThese events did not af fect the health and safety of the public. l Technical Specifications 3.1.3.7, 6.9.1.9b l lo l7] l

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i EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 lDuring a reactor startup, it was discovered that the "09" position was superimposed on l io l3; the "00" RTGB position indication for fully inserted control rod 10-07. During plant l o [4 ; l operation on 6-6-82, it was discovered that the " tens" digit for the RTCB position l 1

lo l3; gindication of control rod 34-27 was inoperable for rod positions "10" through "19". l o 3 lThese events did not affect the health and safety of the public. l

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i i Ithe result of a defective rod position reed switch. These problems will be investicatell y,l7l pnd resolved- during the 1982 refueling outage. As these type failures don't constitutel 1

lil3l la safety hazard and do occur occasionally, it is felt the corrective actions to this l l l4l levent are adequate. I i

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