ML19351C967

LER 80-054/01T-0:on 800919,investigation Revealed That During June 1979 Containment Equipment Access Hatch Bolts Had Been Overtorqued.Caused by Technical Manual Error. Technical Manual Specs Changed & Bolts,Nuts & Pins Replaced

ML19351C967
Person / Time
Site:	Farley
Issue date:	10/03/1980
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19351C966	List: ML19351C965 ML19351C967
References
LER-80-054-01T, LER-80-54-1T, NUDOCS 8010080457
Download: ML19351C967 (2)

Text

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, CONT.TOL BLOCK. l l l l l l l lPLEASE PRINTCG TYPE ALLCEQUIREJINPORIAATIONI i .@*

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g lOn 9-19-80, an investigation revealed that during June 1979 the Unit 1 Containment .t

, 3 gEquipment Access Hatch bolts had b'een overtorqued as a result of an error in the vendors; o ., y technical manual 1.e. a 1992 to 2320 f t-lbs specification should have been 1992 to .2320 g g g n-liis. i It was subsequently determined that this occurrence was reportable per' Tech. g a s ISpec. 6.9.1.8.f. The health and safety of the public were not affected by this  ;

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CAUSE DESCRIPTION AND CCRRECTIVE ACTIONS 27 Q lThe bolt overtorquing resulted from a technical manual error. The following corrective g g jaction has'been accomplished: the unit was shutdown; the manual and associated maint.  ;

, gprocedure were revised; bolts, nuts and pins we.re replaced; the bolts were torqued to  ;

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, 3 ltheir proper value and the hatch successfully passed a local leak rate test. Based on  ;

, , g an inspection of the overtorqued bolts, it was concluded that the hatch was fully  ;

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS capable of performing its design function under all design basis accidents while the bolts were overtorqued.

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