ML19351G422

LER 80-094/99X-0:on 801117,personnel Operated Wrong Channel, BS-MS-484,during Bistable Trip of Steam Line Low Bistable BS-MS-485.Caused by Personnel Error.Station Operating Supervisor Failed to Look at Status Panel

ML19351G422
Person / Time
Site:	Beaver Valley
Issue date:	02/13/1981
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19351G390	List: ML19351G389 ML19351G422
References
LER-80-094-99X, LER-80-94-99X, NUDOCS 8102230677
Download: ML19351G422 (2)

Text

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Attachment To LER 80-94/99X Beaver Valley Power Station l Duquesne Light Company '

Docket No. 50-334 During normal startup operations, a steam line low pressure bistable [BS-MS-485]

began to intermittently trip and reset. The Nuclear Shift Supervisor (NSS) notified the Station Operating Supervisor (SOS) of the problem. The plant was in startup Mode 2 so the SOS went to the control room to be of assistance. The SOS asked the Nuclear Shif t Foreman what channel was alarming and was informed that it was channel [P-MS-484]. The SOS then contacted the control room from the process racks to verify that the status light came on when the bistable was tripped. When communication was noted, the SOS placed channel [P-MS-484] in trip. Since [P-MS-485] was the channel that was tripping, the logic made up (2/3) for a low steam line pressure safety injection.

The personnel involved in this incident were reprimanded and re-instructed via this LER and verbally of the importance of re-checking the steps necessary to complete an important evolution.

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