ML19290E998

LER 80-009/01T-0:on 800225,while in Shutdown Condition,Test Evaluation Determined Bistable Trip Modules,When Used W/Mtu for Calibr of Process Trips,Induced Calibr off-set Which Could Allow Trips Outside Tech Specs.Bistables Recalibr

ML19290E998
Person / Time
Site:	Fort Saint Vrain
Issue date:	03/10/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19290E996	List: ML19290E995 ML19290E998
References
LER-80-009-01T, LER-80-9-1T, NUDOCS 8003170430
Download: ML19290E998 (1)

Text

NRC PORM 366 U. S. NUCLEAR REGULATORY COMMISSloN (7 77). . "

LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) foT'l8 I9 Cl 01 7

vl S i vi 11@l 0 l 01 -l 0101010 LICENSEE CODE 14 15 LICENSE NUM8ER l 01 I o l o lhi 41111l21olhi 25 26 LICENSE TYPE JO l

57 CAT 58 CON'T o Z,"C' l I- @l 0 5 l ')l 0 l 0 l 2 l 6 l 768 @l690 ] 212 l 5 l 8 l 0 74@l 750 l 3REFORT 0 l 81080l@

l 1 DATE 7 8 60 61 00CKET NUM8ER EVENT DATE EVENT OESCRIPTION AND PROSABLE CONSEQUENCES h

[TT'n l While the plant was in a shutdown condition, a test was performed to evaluate the l o a l circulator speed and feedwater flow trios of the PPS. Test evaluation deter,ined thatl o 4 l design of bistable trip modules. when used with MrU for calibration of crocess tries. 1 ITpp l induced a calibration off-set, which could have possibly allowed trips to occur out- I g i side Technical Specification limits. Reportable per Technical Specification i o 7 l AC 7.5.2(a)9. No accompanying occurrence. No affect Cs public health or safety. I o a l  !

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,_ SEQUENTIAL OCCURRENCE REPCRT REVISION LE R /RO EVENT YEAR R EPORT NO. CODE TYPE N O.

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u 4; CAUSE OESCRIPTiON AND CORRECTIVE ACTIONS i o l Cause was test signal from MrU not using the-same input oath as the measured signal 1 g l to General Atomic Model PT-3D and PT-35 bistable trips. Tests performed. Results  !

m j evaluated. Bistables recalibrated as necessary using modified MTU. Change Notice l

, 3 initiated. [

i 4 l l 7 8 9 80 ST T  % POWER OTHERSTATUS OtSCO RY DISCOVERY OESCRIPTION i s J @ l0l0 0 l@l N/A l l C l@l Soecial Test l Abv1TY CC TENT AMOUNT OF ACTIVITY LOCATION OF RELEASE 1 6 RELEASE lZ[ @D OF RELEASE l N/A l lN/A l 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMSER TYPE DESCRIPTION -

i 7 l0l0l0lhlZlhlN/A l PERSONNE L 1NJU IES NUM8ER DESCRIPTION R7 8 9 0 0l0lhlN/A 11 12 80 l

LOSS OF OR DAMAGE To FACIUTY TYPE DESCRIPTION L' ].9.J l z l@lN/ A I 7 8 9 10 80 isSyE DE CRIPTION

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NAME OF PREPARER E: (303) 785-2253 Pg$U317 OlY30