ML20050B058

LER 82-002/01T-0:on 820222,control Operator Moved Group 8 Control Rods Into Tech Spec Restricted Area to Clear Core Axial Imbalance Alarm.Caused by Operator Error.Rod Position Corrected & Computer Alarms Modified to Include Group 8

ML20050B058
Person / Time
Site:	Oconee
Issue date:	03/12/1982
From:	Kutzer J DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20050B034	List: ML20050B033 ML20050B058
References
LER-82-002-01T-01, LER-82-2-1T-1, NUDOCS 8204020542
Download: ML20050B058 (1)

Text

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MAC PORa. 3 4 U.3. NUCLEAR RECUL.ATORY CCaAMassico (1 Tit UCENSEE EVENT REPORT EXHIBIT A courRei.stocol i

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n 3 puen (VfMT otScatFTION AND PRosAats CONSECutNcES o l On February 22, 1982, the Control perator moved Group 8 control rods into the ,

Technical Specification restricted region to clear a core axial imbalance alarm.

g , Operation within the restricted region was not recognized for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and 23 ,

minutes, which is in excess of the Technical Specification 3.5.2.5 two hour g limit. Due to the conservatisms in the analysis it is concluded that the unit o , l was not op'erated outside conditions analyzed for a LOCA; thus, the health and  ;

, , , safety of the public were not affected by this incident. ,

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, , l The apparent cause of this inc ent was operator error, in that the Control ,

, , (Operators did not recognize or verify that the Group 8 control rods exceeded ,

g l' Technical Specification limits. The rod position was corrected, the procedure i

, , l was changed to require verification of proper rod position, and computer alarms y and statalarms will be modified to include Group 8 position limits.

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