ML20039B597

LER 81-027/03L-0:on 811110,primary Heat Trace Circuit for Balance Leakoff Line of Safety Injection Pump 23 Failed. Caused by Burned & Broken Connection at Chromalox Strip Heater Element for Thrust Balance Line

ML20039B597
Person / Time
Site:	Indian Point
Issue date:	12/10/1981
From:	CONSOLIDATED EDISON CO. OF NEW YORK, INC.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20039B591	List: ML20039B590 ML20039B597
References
LER-81-027-03L, LER-81-27-3L, NUDOCS 8112230286
Download: ML20039B597 (1)

Text

N 36G UIS. NUCLEAR REGULATORY COMMISS (7 77) '

• - LICENSEE EVENT REPORT CONTROL BLOCK: l i

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(PLEASE PRINT OR TYPE ALL RCOUIRED INFORM ATION)

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7 8 Eu"E 60l Ll@l64 Ol 5 lOOCKET 0l OlNUMBER0 l 2l 4 l687 @l 6s 111 l 1l0 l 8 l 1l@l112 EVENT DATE 74 73 REPORTl1 DATE l0 l8 l1l@ 80 EVENT DESCRIPTION AND PROBABLE CONSECUENCES h O 2 i During normal operation, while doing a routine watch inspection, an l 0 3 l operator found the primary neat trace circuit for the balance leakoff l 0 n l line of safety injection pump no. 23 had failed. The redundant l O s I heat trace circuit was operable as were the other two safety injection l

[irTs 1 I pumps. Similar event LER 79-014,03. l I

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@g 42 lN 43 l@ l W l 1l 2 l 0lg 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O l Investigation showed the connection at the chromalox strip heater l gl element, Cat. No. PT-512 for thrust balance line No. 467 to be  ;

, , l burned'and broken off. The wires were cleaned and reconnected to the l

, 3 l strip heater element. Tests were made to verify operability and the  ;

i ,, I circuit was returned to service. l 7 8 9 80

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