ML19323D959

LER 80-037/03L-0:on 800418,during Normal Operation,Results of Surveillance Testing Revealed Feedwater Control Sys Level Transmitter 06-LT-52A Out of Calibr.Caused by Seat Leak on Instrument Bypass Valve.Valve Replaced

ML19323D959
Person / Time
Site:	FitzPatrick
Issue date:	05/16/1980
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19323D954	List: ML19323D953 ML19323D959
References
LER-80-037-03L, LER-80-37-3L, NUDOCS 8005220590
Download: ML19323D959 (2)

Text

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NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION l (7 77f )

LICENSEE EVENT REPORT I O- CONTROL BLOCK: l l l l l l lh (PLEASE PRINT oR TYPE ALL REQUtRED INFoRMATioN) J l 6 lo lil8 lN 9 lYLICENSEE lJ l A lF l 1 l@l0 l0 l- l0LICENSE 14 15 l0 l0NUM8ER l0 l -l 0l 0l Ol@l 25 26 4l Il il 1l LICENSE TYPE 1l@l JC l

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REPORT DATE 7 8 60 61 DOCKET NUM3ER 68 69 EVENT OATE EVENT DESCRIPTION AND PRGBABLE CONSEQUENCES h lol2l l During normal operation as a result of surveillance testing Feedwater Control I t o 131 1 System Level Transmitter 06-LT-52A was found out of calibration. The trans- l 1o141 1 mitter feeds one of five no'rmal water level indicators used by operators for l 1 [o_i s i ! surveillance required by TS Table 3.2-6. The out of calibration instrument would l lo ts l l cause one (1) indicator to read approximately 1.5 inches high. No significant l l o 17 l l hazard existed. See attachment for details. l l o la i i 80 l

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44 47 CAUSE DESCRIPTION AND CORRECT 1vE ACTIONS liloll A seat leak on the instrument bypass (equal t zing) valve caused problem. Valve was l 11 li I I replaced, instrument calibrated and verified satisfactory. No additional action 1 j iii2l l required. See attacynt for detaiIs. l t i l 31 l I mI 8 7 9 80 I

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POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FlTZPATRICK NUCLEAR POWER PLANT DOCKET NO.50-333 ATTACHMENT TO LER 80- 037/03L-0 Page 1 of I During normal operations and as a result of surveillance testing, Feedwater Control Level Transmitter 06-LT-52A was found out of calibra-tion. The instrument was out of calibration such that the level indica-tion associated with the transmitter would be in error approximately 1.5" higher than actual level. The transmitter feeds one cf five normal water level indicators used by operators for surveillance requirements in Technical Specifications Table 3.2-6 and provides input to the feed-water control system. The other four normal water level indicators used-by operators were operating properly. The instrument was recalibrated and returned to service. ,

in addition to recalibration, the surveillance frequency was increased.

Surveillance conducted on April 21, 1980 revealed that while the instrument was in calibration some adjustment was desirable. Surveillance conducted on April 22, 1980 yielded satisfactory results. During surveillance conducted on April 23, 1980, the instrument was again out of tolerance by more than allowed by the surveillance procedure. The pattern of failure (or out of tolerance calibration data) Indicated that the instrument bypass (equalizing) valve was leaking. Accordingly, the instrument was removed from service and the bypass valve was replaced. Following replacement, the instrument was calibrated and returned to service on the same day. Additional surveillance was conducted on seven (7) occasions between April 23, 1980 and May 5, 1980 with satisfactory results in each case to verify proper operation of the Instrument. No additional action is required. The event did not represent a significant hazard to the public health and safety.

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