05000366/LER-1979-121-03, /03L-0:on 791117,during Return to Full Power,Max Average Planar Linear Heat Generation Rate of 11.96 Noted. Rapid Increase in Local Thermal Parameters Caused by Burnup of Local Xenon Produced by Rod Withdrawals

/03L-0:on 791117,during Return to Full Power,Max Average Planar Linear Heat Generation Rate of 11.96 Noted. Rapid Increase in Local Thermal Parameters Caused by Burnup of Local Xenon Produced by Rod Withdrawals

ML19262A975
Person / Time
Site:	Hatch
Issue date:	11/30/1979
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19262A972	List: 05000366/LER-1979-121, Forwards LER 79-121/03L-0 05000366/LER-1979-121-03, /03L-0:on 791117,during Return to Full Power,Max Average Planar Linear Heat Generation Rate of 11.96 Noted. Rapid Increase in Local Thermal Parameters Caused by Burnup of Local Xenon Produced by Rod Withdrawals
References
LER-79-121-03L, LER-79-121-3L, NUDOCS 7912110372
Download: ML19262A975 (2)

LER-1979-121, /03L-0:on 791117,during Return to Full Power,Max Average Planar Linear Heat Generation Rate of 11.96 Noted. Rapid Increase in Local Thermal Parameters Caused by Burnup of Local Xenon Produced by Rod Withdrawals

Event date:
Report date:
3661979121R03 - NRC Website

text

NRC FQRM 3G6 U. S. NUCLE AR REGULATORY COMMISSION (7-77 )

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63 EVENT OATE 74 75 REPOHT DATE 80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h During return to full power from a reduction for weekly turbine testina and control l

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l rod adjustments, a MAPLHGR of 11.96 was discovered. This is 100.4% of the Tech Specs ;

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l limit of 11.91 (Technical Specifications 3.2.1).

There were no adverse consequences I

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Georgia Power Company Plant E. I. Hatch Baxley, Georgia 31513 Cause Description and Corrective Actionsto the burn up of local Xenon in the increase-d flux regions produced by the rod withdrawals.

Power reduction began upon discovery and was reduced to 96.7% rated power within the next 30 minutes where the MAPLHGR was 99.97% of its Tech Specs limit.

Personnel have been further instructed in these local Xenon effects and in maintaining sufficient margin to remain within limits at all times.

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