ML17252A836

Report of 4 Inch Recirculation Bypass Line Inspection

ML17252A836
Person / Time
Site:	Dresden
Issue date:	01/14/1975
From:	Stephenson B Commonwealth Edison Co
To:	US Atomic Energy Commission (AEC)
References
BBS 30-75
Download: ML17252A836 (1)

Text

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BBS Ltr. #30-75 Dresden Nuclear Power Station R. R. #1 Morris, Illinois 60450 January 14, 1975 JI Assistant Director for Construction and Operations Directorate of Regulatory Operations

u. s. Atomic Energy Commission Washington, D. c. 20545 SUBJEX::T: License DPR-25 Dresden Nuclear Power Station Unit #3 Report of 4 inch Recirculation Bypass Line Inspection.

Reference:

Dresden Station On-site Review and Inspection No. 75-2 dated January 6, 1975

Dear Sir:

i On January 5, 1975 a weekend outage began on unit three. During the outage the four inch recirculation bypass piping Wa.s inspected for possible cracks. AU. T. inspection of eleven welds Wa.s performed on both the "A"f;,

and "B" recirculation lines. The U.T. examination-included "Ln:};wave and sheer wave testing.* The results of this inspection did not indica;\!e any questionable welds. However, when the inspection <;tata was compared* to the base _line data one weld did not agree. The weld was again examined using the same procedure as was used for the baseline inspection.* The results of this examination duplicated the base line data.

In addition to the U.T. inspection radiograPhs-were also made of the four-weld-o-lets at the 28 inch recirculation header. The results of the radiographs confirmed the results of the U.T. inspection. All of the inspection data was reviewed with a representitfY,e.of.the Atomic Energy Commission and no indications of cracked welds were__ :f,ound-.

• B

• Stephensn Sµperintendent :

BBS:smp

~le/AEC 642