ML19326B319

AO 50-313/74-02:on 740626,leak Found in Decay Heat a Sys Discharge Piping at Coupling Weld of Vent Valve DH-1010. Cause Metallurgical & Will Be Investigated.Defective Pipe Section Will Be Replaced

ML19326B319
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/26/1974
From:	Phillips J ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19326B316	List: ML19326B315 ML19326B317 ML19326B319
References
NUDOCS 8004150705
Download: ML19326B319 (2)

Text

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> NORMAN C HOSELEY DIRECTOR UNITED STATES ATOMIC ENERGY COMMISSION DIRECTORATE OF REGULATORY OPERATIONS REGION II 230 PACHTREE ST NORTHWEST SUITE 818 ATLANTA GA 30303 t

ABNORMAL OCCURRANCE REPORT NUMBER 50-313/74=2 REPORT SUBMITTED WAS IN CONCURRENCE WITH AEC INSPECTOR MIKE KIDD.

( (A) ON JULY 26,1974 AT 0042 HOURS DURING NORMAL SYSTEMS INSPECTION A LEAK IN THE OECAY HEAT A SYSTEM DISCHARGE PIPING WAS IDENTIFIED AT THE COUPLING NELD OF VENT VALVE DH=1010 DECAY HEAT A SYSTEM c'\ WAS SECURED AND DLC4Y HEAT B SYSTEM WAS BROUGHT INTO OPERATIOM.

(di PLANT WAS IN COLD SHUTDOWN CONDITION PRIOR TO INITIAL CRITICALITY AND NO SAFETY IMPLICATIONS WERE INVOLVED.

(B) CAUSE OF CRACK BELIEVED TO BE METALLURGICAL IN NATURE! FURTHER INVESTIGATION TO FOLLOW. DEFECTIVE PIPE SECTION WILL BE REPLACED USING ACCEPTED PROCEDURES. PROBLEM BELIEVED TO BE ISOLATED CASE.

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