05000336/LER-1980-037-03, /03L-0:on 801025,during Routine Surveillance, Bistable Setpoint That Instates Channel D Local Power Density & Loss of Turbine Trips Found Above Required Setpoint.Caused by Normal Bistable Drift.Bistable Recalibr

/03L-0:on 801025,during Routine Surveillance, Bistable Setpoint That Instates Channel D Local Power Density & Loss of Turbine Trips Found Above Required Setpoint.Caused by Normal Bistable Drift.Bistable Recalibr

ML19354C386
Person / Time
Site:	Millstone
Issue date:	11/24/1980
From:	Clement C NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19345B802	List: 05000336/LER-1980-037, Forwards LER 80-037/03L-0 05000336/LER-1980-037-03, /03L-0:on 801025,during Routine Surveillance, Bistable Setpoint That Instates Channel D Local Power Density & Loss of Turbine Trips Found Above Required Setpoint.Caused by Normal Bistable Drift.Bistable Recalibr
References
LER-80-037-03L, LER-80-37-3L, NUDOCS 8012020535
Download: ML19354C386 (1)

LER-1980-037, /03L-0:on 801025,during Routine Surveillance, Bistable Setpoint That Instates Channel D Local Power Density & Loss of Turbine Trips Found Above Required Setpoint.Caused by Normal Bistable Drift.Bistable Recalibr

Event date:
Report date:
3361980037R03 - NRC Website

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8 60 61 COCKET NU?.*S ER 68 69 EVENT DATE 74 75 REPCRT D ATE 80 EVENT DESCRIPTION ANo PROB ABLE CONSEouENCES h o 121 l During routine surveillance of the reactor orotection system. tha hittible cornnin+

l that instates Channel D local power density and loss of turbine trios *was found above i o 33 j l I o 1.s i I the required setpoint.

The LPD and loss of turbine trips are recuired to be insta+ad _]

above 15 percent power per Table 3.3-1 (Note C) and Table 2.2-1 (Note C) of the l

o isi I l0 Js j ; Technical Specifications.

The plant was operated within Technical Soecification Table 1 j o l7] l 3.3-1, Action Statement 2.

There have been no similar events.

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