05000325/LER-1981-003-03, /03L-0:control Rod 26-35 on 810103,18-51 on 810113,38-31 & 22-15 on 810114 Showed Inaccurate Position Indications.Caused by Buffer Card Failure on 26-35;defective Reed Switches in Others.Card Replaced,Switches Repaired

/03L-0:control Rod 26-35 on 810103,18-51 on 810113,38-31 & 22-15 on 810114 Showed Inaccurate Position Indications.Caused by Buffer Card Failure on 26-35;defective Reed Switches in Others.Card Replaced,Switches Repaired

ML19341A655
Person / Time
Site:	Brunswick
Issue date:	01/20/1981
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19341A653	List: 05000325/LER-1981-003, Forwards LER 81-003/03L-0 05000325/LER-1981-003-03, /03L-0:control Rod 26-35 on 810103,18-51 on 810113,38-31 & 22-15 on 810114 Showed Inaccurate Position Indications.Caused by Buffer Card Failure on 26-35;defective Reed Switches in Others.Card Replaced,Switches Repaired
References
LER-81-003-03L, LER-81-3-3L, NUDOCS 8101270631
Download: ML19341A655 (1)

LER-1981-003, /03L-0:control Rod 26-35 on 810103,18-51 on 810113,38-31 & 22-15 on 810114 Showed Inaccurate Position Indications.Caused by Buffer Card Failure on 26-35;defective Reed Switches in Others.Card Replaced,Switches Repaired

Event date:
Report date:
3251981003R03 - NRC Website

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lwhile moving contrcl, rods during load changes, on January 13, 1981, rod 18-51 did not 1 4

s I have position indi ation at position "48," and on January 14,1981, rod 38-31 did not I l

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i o y land normal indication for rod 26-35 was restored. Rods 18-51, 38-31, and 22-15 i

j are believed to have defective reed switches located in the PIP probe. These switches l g l will be repaired during the next outage of sufficient length to allow work in the l

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