ML20085E437

LER ER-76-044:on 761206,steam Generator Low Level Trip Setpoint (Channel D) Found Below Tech Spec Limit.Caused by Setpont Drift & Indistinct Administrative Limit Vs Tech Spec Limit

ML20085E437
Person / Time
Site:	Palisades
Issue date:	01/04/1977
From:	Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-ER-76-044, LER-ER-76-44, NUDOCS 8308110441
Download: ML20085E437 (2)

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O UCENSEE EVENT REPOIU a Palisades 4 ,

f CcNTROL 8tOCx:l l l l l l l t*Laans pasar ALL ameuinan impoemaTion) 1 8

W g l M l Il Pl Al Ll 1l uCENu NuM=R l0 l0 l-l 0.l 0 l 0 l 0 l 0l-l0 l0 l lh l1 l1 l1 l1 l

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s0 COCKET NUMSER EVENT OATE REPORT DATE

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• l d80 l0 l5 l0 l-l 0 l 2 l 5 l 5 l l ll 210l 6l7 l6 l l0 l1l 01 hl 7l 7l 4 7 8 57 58 59 81 88 89 74 75 80 EVENT DESCRIPTION DE l During monthly testing of the RPS, the SG low level trip set point (Channel D) was l l 7 89 80

) @ l found to be below the' Tech Spee limit by 0.135 inch. She other three chennels were l 7 89 80 -

i E l normal. In addition, a review of this event disclosed that a similar set noint drift80l j 7 89 SE I had occurred on 9-2-76 but was not reported due to an error in the calculation. In l 7 89 80 l

3G l both instances the set point was returned to the proner (ER-76-Ohh)(Contd on Line 18) l

7 8 is m 80 CE COMPONENT CODE MANL 74CTufER WOLATCN

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, 7 89 10 11 12 17 43 44 47 48 CAUSE DESCHIPTION l 3E l The cause of this event was both set point drift and an administrative limit that was l 7 89 80

32 l close to the Tech Spec limit. l

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. , I l 3  % POWER OTHER STATUS 06 VE OSCOVERY OESCRPTON fM7 8 d l1lO!0l l NA l [bj l NA j 9 10 12 13 44 45 48 ?p '

l EO O AMOUNT OF ACTNITY LOCATON OF RELEASE Q

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] SE l 10 11 NA l 44 45 l NA 80 l

! PERSONNEL D(POSURES l NUMSER TYPE OESCRPTCN DE IOl 0l0l 7 89 11 Wl12 13 NA 80 l

PERSONNEL INJURIES

, NUMSER DESCAPTON

! '1 l 0l0 l0 l l NA l 7 89 11 12 80 PROBABLE CONSEQUENCES ,

32 l None; the other channels were found acceptable. l 7 89 80 LOSS OR DAMAGE TO FAC!LITY TYPE DEsCRPTON

@dl 7 89 10 NA 80 l

8308110441 770104 PUBLICITY PDR ADOCK 05000255 S PDR l

'"% l 9None 80 ADDITIONAL FACTORS D[ l (Contd From Line 6) value. A review of the administrative set point limit indicated l 7 89 80 D[ l that it was too close to the Tech Spec limit. The administrative limit is being l

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O M., %'*O IE ELF,00PY n' $ CORSUIR8f5 it. g Power

%.md5 Company Acar o.n.,.i omC.. m w.. uicnio.n Av.nu.. Jack.oni McChig.n 49201 e Ar.a Cod. S17 788-OSSO January k, 1977 6,\ \f ~': ,

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. j Pr James G Keppler 'k s ~

Office of Inspection & Enforce =ent Region III

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' US Nuclear Regulatory Co==ission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255, LICENSE DPR PALISADES PLANT, ER-76 kh -

SG TRIP SET POINT DRIFT Attached is a Reportable Event which relates to the Palisades Plant Reactor Protection Systen (RPS) Steen Generator (SG) Icv level trip set point. The set point on ene channel was found to have drifted 0.135 inch below the ac-ceptable value.

David A 31xel (Signed)

David A Bixel Assistant Nuclear Licensing Administrator

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