05000313/LER-1979-005, /03L-0:on 800716,during Power Operation,One Small Primary to Secondary Leak Developed in Tube 74-1 of Steam Generator E24A.Cause of Failure Believed Similar to Defective Tubes Reported in LER 79-005/03L-0

/03L-0:on 800716,during Power Operation,One Small Primary to Secondary Leak Developed in Tube 74-1 of Steam Generator E24A.Cause of Failure Believed Similar to Defective Tubes Reported in LER 79-005/03L-0

ML19344B061
Person / Time
Site:	Arkansas Nuclear
Issue date:	08/15/1980
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19344B060	List: 05000313/LER-1980-026, Forwards LER 80-026/03L-0
References
LER-80-026-03L-01, LER-80-26-3L-1, NUDOCS 8008250508
Download: ML19344B061 (1)

LER-1979-005, /03L-0:on 800716,during Power Operation,One Small Primary to Secondary Leak Developed in Tube 74-1 of Steam Generator E24A.Cause of Failure Believed Similar to Defective Tubes Reported in LER 79-005/03L-0

Event date:
Report date:
3131979005R00 - NRC Website

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S to 61 00C8tET Nuuggn 68 69 EVENT DATE 34 FS HEPOR10 ATE 80 EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h LO_12) I During Power operation, a small primary to secondary leak developed, i

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tradiation monitor indication.

Leakage was verified to be from Steam i

O a Generator, E24A, by chemical analysis of the secondary system activity.

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3.

1 6.

1 and the secondarv system i

l activity limit per T. S. 3.10 were not exceeded. An orderly unit shut-l O,

109IIdnwn was er ectit ed. There were nn similnr nceurrences.

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gg gj gg 47 CAUSE DESCR.PTION AND CORRECflVE ACTIONS 27 m lFollowing unit shutdown, testing identified leaker to be tube 74-1.

Testi g ;ing also revealed tube 140-68 to have an extremely small amount of leak-i m lage. A sampling of tubes around each leaker 6 all of the "open lane" r

l tubes were Eddy Current Inspected. Tube 78-62 was identified to have a

, 3 E ' 61 % thruwall OD d efec t.

Cause of failure is believed to be similar i

',Mgrypreviously identified def tim tubes reported by LER 50-313/ S-005.

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