05000334/LER-1980-098-03, /03L-0:on 801122,main Steam Flow Indicator FI-MS-484 Was Pegged Low.Caused by Transmitter Bypass Valve FT-MS-484 Not Being Fully Closed.Valve Closed

/03L-0:on 801122,main Steam Flow Indicator FI-MS-484 Was Pegged Low.Caused by Transmitter Bypass Valve FT-MS-484 Not Being Fully Closed.Valve Closed

ML19340D482
Person / Time
Site:	Beaver Valley
Issue date:	12/18/1980
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19340D478	List: 05000334/LER-1980-097-03, /03L-0:on 801121,containment Airlock Doors Failed Seal Leakage Surveillance Test.Caused by Wood Sliver Adhering to Door Sealing Face & Inner Door O-rings Improperly Mating.Seals Greased.Wood Sliver Removed 05000334/LER-1980-098-03, /03L-0:on 801122,main Steam Flow Indicator FI-MS-484 Was Pegged Low.Caused by Transmitter Bypass Valve FT-MS-484 Not Being Fully Closed.Valve Closed 05000334/LER-1980-099-03, /03L-0:on 801125,RCS Loop 2 Channel 1 Flow Indicator FI-RC-424 Showed Reading Above Surveillance Requirement.Caused by Isolation Amplifier Drift.Isolation Amplifier Repaired 05000334/LER-1980-100-03, /03L-0:on 801125,RCS Leakage Exceeded Tech Spec Limit.Caused by Faulty Seal Water Injection Filters & Drain Valves.Valves Replaced 05000334/LER-1980-101-03, /03L-0:on 801126,control Room Chlorine Detector CLA-VS-101A Failed to Meet Operating Surveillance Requirement for Drip Rate.Caused by Clogged Detector Wick & Tank Vent Failure.Vent Filter Replaced & Wick Cleaned ML19340D477
References
LER-80-098-03L, LER-80-98-3L, NUDOCS 8012300670
Download: ML19340D482 (2)

LER-1980-098, /03L-0:on 801122,main Steam Flow Indicator FI-MS-484 Was Pegged Low.Caused by Transmitter Bypass Valve FT-MS-484 Not Being Fully Closed.Valve Closed

Event date:
Report date:
3341980098R03 - NRC Website

text

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NRC FCCM 364 U. S. NUCLE A3 fiEGULATO3Y COMMISSION (7-771

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g l At 1525 hours0.0177 days <br />0.424 hours <br />0.00252 weeks <br />5.802625e-4 months <br /> with the reactor operating at about 30 percent power, oporator I

surveillance of the board revealed that main steam flow indicator FI-MS-484 was l

gl [aj.;l pegged low.

Actual steam flow was about 1 million ihm/hr. All associated bistable l 1 o 15 I I switches were placed in " trip" as required by Technical Specifications 3.3.1.1 and l lo is ] I 3.3.1.2.

The health and safety of the ceneral public was not jeopardized since the l lo 7l l redu idan:. channel was operable and capable of actuation.

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23 34 05 36 37 40 44 42 43 4A a7 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l i l o l l The transmitter, FT-MS-484, bypass valve was not fully closed. The valve was fully i 12 iiiI closed and the channel checked for proper indication.

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Attachment To LER 80-98/03L Beaver Valley Power Station Duc,uesne Light Company Docket No. 50-334 No further information is available or needed to satisfy the reporting requirement l

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