ML19351F388

LER 80-040/03L-0:on 801206,control Element Assembly 31 Dropped to Zero Steps from 180 Steps.Cause Not Stated.Power Reduced & CEA Realigned

ML19351F388
Person / Time
Site:	Millstone
Issue date:	12/31/1980
From:	Resetar J NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19351F386	List: ML19351F385 ML19351F388
References
LER-80-040-03L, LER-80-40-3L, NUDOCS 8101120355
Download: ML19351F388 (1)

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t.lCENSEE EVENT REPORT l (PLEASE P;lNT CO TYPE ALL REQUl ED INF02MATION!

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CONTROL 8LOCIC: 1 I

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REPoRroATE F 5 60 61 ooCK ET NUug g R 68 69 il EVENT DESCRIPTION AND PROS A8LE CONSECUENCES h a 2 puring steady-state 100% power operation. CEA No. 31 droceed to zero steos frem 180  !

m l steps. This resulted in operation in Action Statements 3.1.3.1.e (CEA misalignment). I I o j. j p.2.2.a (Fxy(T)-maximum of 1.615) and 3.2.4.a (Tilt-greater than .02). Power was I gotsi ireduced and CEA No. 31 realigned with Group 1 within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. Fxy(T) and tilt were I a s pithin specification within 4.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> of CEA realignment. Similar Occurrences: 1-l o j i j [78-14 and 79-03. I oa i l-

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_ stoutNrtAL OCCUAAENCE REPORT Revision LE EVENrYEAR R EPoRr NO.- CooE TYPE No.

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34 35 34 37 40 41 42 43 4 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 No carts were reolaced l g IThere were no component failures causino the CEA to droo.

I l3 li; pnd the CEA was recovered. I I

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