ML20126C723

Final Deficiency & Part 21 Rept Re Air Baffle Weld Cracks on Emergency Diesel Generators Supplied by Louis Allis. Initially Reported on 850501.Conical Air Baffles on Four Emergency Diesel Generators Repaired

ML20126C723
Person / Time
Site:	Hope Creek
Issue date:	06/03/1985
From:	Martin T Public Service Enterprise Group
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-85-284-000 PT21-85-284, PT21-85-284-000, NUDOCS 8506140504
Download: ML20126C723 (2)

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Pubhc Service Electric and Gas Company Thomas J. Martin 80 Park Plaza, Newark, NJ 07101 201-430-8316 Mailing Address: P.O. Box 570, Newark, NJ 07101 Vice President Engineering and Construction June 3, 1985

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Dr. Thomas E. Murley, Administrator U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement I

Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Dr. Murley:

SIGNIFICANT CONSTRUCTION DEFICIENC'I AIR BAFFLE WELD CRACKS - EDG HOPE CREEK GENERATING STATION On May 1, 1985, a verbal report was made to Region I, Office of Inspection and Enforcement representative, Mr. E. Kelly, advising of a potentially significant construction deficiency j concerning air baffle weld cracks on our Emergency Diesel

Generators. The following final report is provided in l accordance with 10CFR50.55 (e) .

1 Description of the Deficiency Public Service Quality Assurance personnel have inspected the welds on the Emergency Diesel Generator conical air baffles in accordance with Louis Allis 10CFR21 Reports dated March 29, and April 15, 1985. On three of the Emergency Diesel Generators, linear indications were fo ad on the vendor stitch welds securing the baffles to the generatcA shrouds. Startup Deficiency Reports (SDR's) KJ-0581, KJ-0597, KJ-0598 and KJ-0677 were issued to document and control the hardware.

Safety Analysis We have determined that under operating conditions, the linear indications found in the baffle welds could propagate and cause a section of the conical baffle to braak loose, fall into the rotating equipment and possibly disable the generator.

fjj61j % O504 850603 05000354 S 1 PDR f g I

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Dr. T. E. Murley 2 6/3/85 The Emergency Diesel Generators are safety related items of equipment and under Loss of Power (LOP) conditions, they provide power to class lE motor control centers and other safety related equipment required for safe shutdown of the plant. Therefore, we conclude that the subject deficiency could adversely affect safe shutdown of the plant and, consequently, is reportable in accordance with 10CFR50.55 (e) .

Corrective Action In accordance with the disposition to the SDR's, the conical air baffles on the four (4) Emergency Diesel Generators have been repaired utilizing a continuous fillet weld backed by a seal weld.

This activity was witnessed and documented by Bechtel Quality Control personnel.

Very truly yours,

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C Office of Inspection and Enforcement Division of Reactor Construction Inspection Washington, D. C. 20555 NRC Resident Inspector - Hope Creek P. O. Box 241 Hancocks Bridge, NJ 08038 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, GA 30339 l

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