ML19351F535

LER 80-109/03L-0:on 801208,axial Flux Difference Increased Above Target Band.Caused by High Initial Second Fuel Cycle 100% Target Flux Value.Target Flux Value Lowered

ML19351F535
Person / Time
Site:	Beaver Valley
Issue date:	01/05/1981
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19351F522	List: ML19351F521 ML19351F524 ML19351F526 ML19351F529 ML19351F532 ML19351F535
References
LER-80-109-03L, LER-80-109-3L, NUDOCS 8101130443
Download: ML19351F535 (2)

Text

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NRC PORhil des V.S.NUCLEAD KECULATCGY COMMISSION mTh LICENSEE EVENT REPORT (PtEAst PRINT OR TYPE ALL REQUIRED INPORMATIONI CONrROL OLOCK: l l l } l l l@

lo l i4 j9l P lUCENSEE A l 3COOE l V l S l 1 J@IS0 l0UCENSE l- l0 Nuvet l0 l0 l0 l0 l- l0 2$ l026[@l4 UCENSE l1 lifvPEl140l1 [@l l

ti GA f $8 l@

I 14 A CCN*T 101:1 i 8 1% l L @l 0 l 51010 40 48 l0 l 3 } tie314 l@l 1 l 2 l 0 l 8 l 8 lREPORTOATE OOCKET *suustm 69 EV ENT OATE 74 75 0 }@l 0l 1l Ol 5l 81 1 80 EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h .

j IOI21i At 025C aours while increasing power, the Delta Flux Out Of Target Band alarm was l

10 # 31 l received. After stopping the power increase at 80 percent, the Axial Flux l

I o 141 l Dif ference ( AFD) reentered the tarcet band in 9 minutes. The AFD also left the l

ITTs"l l band for 1 minute at 0301 hours0.00348 days <br />0.0836 hours <br />4.976852e-4 weeks <br />1.145305e-4 months <br />. Power operation continued in accordance with l'IiTs~l 1 Technical Specification 3.2.1. The henith and safety of the public was not l

I III7l I ienpardized since the AFD remained well within the AFD safety limits.

l 10181I .0 CAUSE COUP. VALVE SYSTEM CAUSE SUSCODE SUSCODE COOE CODE SUSCODE COuPONENT CODE 7

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(gneno EVENTYEAR REPORT NO.

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CAUSE DESCRIPTION AND COR'RECTIVE ACTIONS I

li t o l l The departure of the AFD from the low side of the target band occurred because the I

li t i l l initial second fuel evele 100 percent target flux value of +6.8 nercent was in

~

On 12/9/80. a new value of +1.69 percent was determined based on operating i m I error.

On 12/30/80 the 100 percent target flux l g l data obtained near 80 percent power.

I In14i I value was further revised to -0.75 percent. e0 7 8 1 0:5CO Y OtSCOV ERY DESCRIPTION 5A * % POWER OTHER STATUS l

• 5 l Flh l 0' l 8 l 0l@l" N/A l l A l@l Annunciator panel alarm **

ACTIVITY CCOTcNr LOCATION OP RELEASE @

atteaseO OP atteAst l1 l AmouwTOPN/A ACTiv:TY l @l N/A l

' 18' *l l PsmsONNatexPos 2l@ ' LZj@dass " "

wasta TvPt OrsCniPTiON@ l l1171 l 0 l 0 l 0 l@l Z l@l N/A 80 Ptp50NNEt iNJuniE5 Nuveta OesCaiPTionh l N/A fiTTI I O I O I O l@la s0 7 8 9 it T E Ot1CR PT one I

N/A

[.'_L2J(_Z_J@l !O to 1 4 9 itst,E 12101 [lt.f@*.,E l CMIPTION N/A l lllllllll!!ll1 68 69 80 3 7 3 9 r0 ~ ~

NAME OF PAEPARER w* S* L#U"Y PHONE.

--810Jyggj/C. . - . - - - .-

Attachment To LER 80-109/03L Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 No further information is available or needed to satisfy the reporting requirement.

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