ML20133P161

Interim Part 21 & Deficiency Rept D/N 59 Re Cracked Welds on Diesel Generator Air Deflectors Supplied by Louis-Allis Co. Initially Reported on 850624.Corrective Actions Not Received from Vendor.Next Rept Expected by 850927

ML20133P161
Person / Time
Site:	Satsop
Issue date:	07/24/1985
From:	Kohler A WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Dirsch D, Kirsch D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
REF-PT21-85-476-000 D-N-59, G3-85-402, GO3-85-402, PT21-85-476, PT21-85-476-000, NUDOCS 8508140184
Download: ML20133P161 (3)

Text

. - - . _ _

,, l o N

VED Washington Box 1223 Public Elma, Washington Power 98541-1223 Supply Systengg EE. 23 (200 482-4428 l Pd, e Sg NEC10?/y7y July 24, 1985 G03-85-402 Docket No. 50-508 U. S. Nuclear Regulatory Commission, Region V l Office of Inspection and Enforcement 1450 Maria Lane, Suite 260 Walnut Creek, California 94596-5368 Attention: Mr. D. F. Kirsch, Acting Director i

Division of Reactor Safety and Projects

Subject:

WASHIl4GTON NUCLEAR PROJECT NO. 3 P0TENTIAL 10CFR50.55(e) DEFICIENCY DIESEL GENERATOR AIR DEFLECTORS, D/N #59 On June 24, 1985, the Supply System notified your office of a potential 10CFR50.55(e) deficiency concerning the subject condition. An investigation is in progress; however, sufficient dat6 has not been received from the Vendor to determine the cause, corrective / preventive actions and safety significance.

Therefore, a Supply System approved Interim Report is attached.

t

+

8508140184 850724 PDR ADOCK 05000509 s PDR I

I l ZF.17

U. S. Nuclear Regulatory Commission, Region V Page Two July 24, 1985 G03-85-402 WASHINGTON NUCLEAR PROJECT NO. 3, POTENTIAL 10CFR50.55(e) DEFICIENCY, DIESEL GENERATOR AIR DEFLECTORS, D/N #59 It is anticipated that a Final Report will be provided to your office by September 27, 1985. Should you have any questions or desire further informa-tion, please contact me directly.

&l\,

l 4 .AD. Kohler Acting WNP-3 Program Director DRC/cae

Attachment:

Interim Report cc: Mr. J. A. Adams, NESCO Mr. R. M. Boucher, Pacific Power & Light Company Mr. W. L. Bryan, Washington Water Power Company Mr. J. Crnich, Ebasco - Elma Ebasco, Elma Mr. J. R. Lewis, Bonneville Power Administration Mr. R. V. Myers, Puget Sound Power & Light Company Mr. D. Smithpeter, BPA Mr. S. F. Swearngin, BPA Mr. B. D. Withers, Portland General Electric Company Document Control Desk - U. S. NRC I

l l

o @

WASHINGTON NUCLEAR PROJECT NO. 3 (DOCKET NO. 50-508 POTENTIAL 10CFR50.55(e) DEFICIENCY INTERIM REPORT DIESEL GENERATOR AIR DEFLECTORS (D/N NO. 59)

DESCRIPTION OF THE DEFICIENCY Louis Allis notified the Nuclear Regulatory Commission of a potential problem invciving possible fractured or cracked welds on the Emergency Standby Generators. The Supply System was identified as an end user of two (2) such generators. These were fabricated by Louis Allis and purchased by the Supply System from Colt Industries as part of the Emergency Standby Diesel Generator Sets.

The welds in question secure the conical air deflectors to the three piece coil guards located at the outboard end of each generator. There are approximately sixty (60) 3/16" fillet welds, one (1) inch long, on three (3) inch centers on each generator. The inspection, as recommended by Louis Allis, consisted of a visual examination for possible cracks or fractures.

Subsequent to this notification, an inspection was performed on the welds in question. The result of the inspection showed evidence of some weld defects (e.g., crater pits, cracked tacks, improper weld termination, improper weld profile).

SAFETY IMPLICATIONS The subject generators supply electrical power to the 4.16KV Class IE ESF Systems in the event of a loss of offsite power. A gross failure of the welds in question could result in the air deflector falling into the internal rotating portion of the generator while it is in service. Such an event, if it were to occur, could result in generator failure. To-date, it has not been determined whether the wela deficiencies could result in weld failure.

CORRECTIVE ACTIONS The noted defects were documented on a Nonconformance Report and transmitted to the Vendor for disposition and determination of corrective action (if any). To-date, a response has not been received. Following receipt of information from the Vendor, appropriate corrective action will be taken and a Final Report will be submitted by September 27, 1985.

l l

l J