ML20038C906

LER 81-026/01T-0:on 811120,primary to Secondary Leak of Approx 1.5 Gpm Found in Steam Generator A.Caused by Leaking Explosive Plug.Plant Shut Down,Plug Removed & Weld Repaired on 811127

ML20038C906
Person / Time
Site:	Robinson
Issue date:	12/04/1981
From:	Gilman F CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20038C903	List: ML20038C902 ML20038C906
References
LER-81-026-01T, LER-81-26-1T, NUDOCS 8112140249
Download: ML20038C906 (2)

Text

NRC FORM 3S6 U. S. NUCLE AR REGULATORY COMMISSION (7 77) "

. LICENSEE EVENT REPORT (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) l CONTROL BLOCK: l l l l l l l i e l0 l1l 7 8 9 lS l C lH lB lR l 2 l@l0 l0 l- l0LICENSE LICENSEE CODE 14 is l0 l0NUveERl0 l0 l- l0 l0 25l@l4 26 l1LICENSE l1 l1TYPE l1 JOl@l6 7 CAl T b8lg CCN'T l0Ill 7 6 5$RC60 ll hl0 l 5 l0DOCK 61 l0ETl0NUMBER l2 l6 l1 @l169 11EVENT 68 l2 l0 DATE l8 l1 @l1 12 l0 l4 l8 l180l@

14 7S REPORT DAT E EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h Iol2l lOn November 20, 1981, at about 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br />. with the unit at 55% p.,wer. a primarv to I lolal Isecondary leak of approximately 1.3 gpm was identified in "A" Steam Generntor. This I l o l 41 l leak rate exceeds Technical Specification 3.1.5.3 which is reportable pursu.mt to I lo Isl 1 6.9,2.a.3. All leakage was handled by normal plant systems so there was nc, threat J j o le l l to the public health and safety. _j I

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ACTION FUTURE EFFECT SHUTDOWN A TT AC HM E N T N P R D.4 PRIVE COMP. COUPONENT TAKEN AC TION ON PL ANT METHOD HOLRS . SUB MI TT E D FORK 16UB. SUPPLIER MANUFACTURER lJJB l@lJ4 z l@ l35A l@ l30A l@ l l l l l [NJ@

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J e. 40 da cAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l-lollUpon discovery of the leak, plant shutdown was immediately commenced. Inspection of l li j i l l"A" Steam Generator showed that the leakage was caused by a leakine explosive pluc. I i,j7, [which was installed in 1972. The plug was removed, and a weld repair completed on i i, i 3 g l November 27, 1981. No further actions are considered necessary. ]

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05000lll} 80 5 NAVE OF PREPARER F. M. Gilman pgoye. (803) 383-4524 2

SUPPLDIENTAL INFORMATION FOR LICENSEE EVENT REPORT 81-026

1. Cause Description and Analysis On November 20, 1981, at about 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br />, with the unit at 55% power, a primary to secondary leak of approximately 1.5 gpm was identified in "A" Steam Generator, A plant shutdowr. was immediately commenced.

Inspection of "A" Steam Ge'.Krator showed that the leakage was the result of a leakinf, explosive plug, which had been installed in 1972.

The leak rate of 1.5 gpm exceeds Technical Specification 3.1.5.3 which is reportable pursuant to 6.9.2.a.3. All leakage was handled by normal plant systems so there was no threat to the public health and safety.

2. Corrective Action The plug was removed and a weld repair completed on November 27, 1981.

3. Corrective Action To Prevent Recurrence The above corrective action should be sufficient to preclude leakage from the effected tube in the future.

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