05000364/LER-1981-016-03, /03L-0:on 810523 & 24,temp Average Decreased Below Required Temp.Caused by Overfeeding Steam Generators During Transient Rod Movements.Operators Cautioned.Temp Restored

/03L-0:on 810523 & 24,temp Average Decreased Below Required Temp.Caused by Overfeeding Steam Generators During Transient Rod Movements.Operators Cautioned.Temp Restored

ML20004F958
Person / Time
Site:	Farley
Issue date:	06/23/1981
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20004F954	List: 05000364/LER-1981-002-03, /03L-0:on 810525,during Testing,Steam Generator Code Safety Valve on Steam Line B Opened & Did Not Reseat. Cause Unknown.Valve Returned to Mfg for Investigation & Replaced 05000364/LER-1981-016-03, /03L-0:on 810523 & 24,temp Average Decreased Below Required Temp.Caused by Overfeeding Steam Generators During Transient Rod Movements.Operators Cautioned.Temp Restored 05000364/LER-1981-017-03, /03L-0:on 810602,train a Chlorine Detector Was Declared Inoperable.Caused by Broken Reset Switch.Switch Replaced ML20004F953
References
LER-81-016-03L-01, LER-81-16-3L-1, NUDOCS 8106260343
Download: ML20004F958 (2)

LER-1981-016, /03L-0:on 810523 & 24,temp Average Decreased Below Required Temp.Caused by Overfeeding Steam Generators During Transient Rod Movements.Operators Cautioned.Temp Restored

Event date:
Report date:
3641981016R03 - NRC Website

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60 68 Dock ET NUM8 E A 63 69 EVENT OAT 3 74 73 AEPCAT DATE 80 EVENT DESCRIPTION AND PROSABLE CONSEQUENCES Oio I o i 2 l l At 0630 on 5/23/81 and 0310 on 5/24/81, Tavg. decreased ~ to less than 541*F.

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[ o 6 J_] I3.1.1.4 requires Tavg. to be greater than or equal to 541*E when the reactor is critical. l l o 14 l l Tech. Spec. 3.1.1.4 action statement requirements were met.

Health / safety of the public l [oi3; lvas not affected by this event.

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33 34 35 26 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECT 1vE ACTIONS l1 I o l lThe first event occurred durine start up when chaneine from auxiliarv feed flew to main I

fi!ii i feed flow using the cain feed bypass valves. The steam generators were underfed for a l

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, a3; joverfed to restore the levels which resulted in Tavg. decreasing to less than 541*F.

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,,i,; jeecond event was caused by overfeeding the steam generators during a transient initiated ;

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by~ steam dump testing.- Tavg. was returned to a value greater than 541*F at 0633 cn 5/23/81 and 0313 on S/24/81. Plant operators involved in performing-rod move-

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ment and controlling steam generator level have been cautioned to closely' coordinate their actions in order to prevent reo'ecurrence of this type event..

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