ML20081H594

Interim Deficiency Rept,Item 103 Re Pacific Scientific Capstan Spring Tang Cracks in PSA-1 & PSA-3 Mechanical Snubbers.Initially Reported on 830930.New Snubbers Purchased to Augment Warehouse Supply

ML20081H594
Person / Time
Site:	Fermi
Issue date:	10/30/1983
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
103, 10CFR-050.55E, 10CFR-50.55E, EF2-65291, NUDOCS 8311070517
Download: ML20081H594 (2)

Text

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October 30, 1983 EF2-65291 Mr. James G. Keppler, Regional Administrator Region III U.S. Nuclear Regulatory Cm mission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Subject:

Report of 10CFR50.55(e) Itan on capstan Spring Tang Cracks in PSA-1 and PSA-3 Mechanical Snubbers (#103)

Dear Mr. Keppler:

On Septmber 30, 1983, the Nuclear Regulatory Cmmission (NRC) was notified of a potentially reportable deficiency concerning Pacific Scientific capstan spring tang cracks in PSA-1 and PSA-3 mechanical snubbers. Detroit Edison's Mr. W.R. Wingfield, Quality Engineer -

Construction Quality Assurance telephoned Mr. J. Konklin of NRC Region III M report this deficiency.

Pacific Scientific Cmpany recently informed Daniel International of the subject concern. Subsequent testing of PSA-1 Shock Arrestors, at Union Electric's Callaway Station by Daniel Inter-national personnel revealed a broken capstan spring tang in four (4) of seven (7) snubbers tested. Daniel International forwarded this information to Detroit 1dison.

Upon receipt of information tlat potentially defective snubbers had been shipped to the Fermi 2 Site, Field Hanger Engineering inmedi-ately began a program to cross-correlate the serial numbers with the Edison Pipe Support Mark Numbers. A ccrr.prehensive study was conducted to develop a recm mendation. Project Design has pro-posed the following to resolve the snubber problem:

Purchase new snubbers to augment those warehoused so that five (5) " seed" PSA-l's and 3's would be available for replacernents. . The renoved snubbers could then be rebuilt and used to replace the next five (5) snubbers, progress-ively. At the end of this process, the project would ._

have five (5) PSA-l's and 3's to serve as permanent plant spares.

8311070517 831030 PDR ADOCK 05000341 S PDR h

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r- y-o Mr. James G. Keppler, Regional Adninistrator October 30, 1983 EF2-65291 Page'2 Another report on this item, either interim or final, will be sent when further information is available. If you have questions con-cerning this matter, please contact Mr. G.M. Trahey, Assistant Director - Project Quality Assurance.

Very truly yours, DAW /EHN/pn cc: Mr. Richard DeYoung, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Cam 11ssion Washington, D.C. 20555 Mr. Paul Bryon, Senior Resident Inspector U.S. Nuclear Regulatory Comnission 6450 North Dixie Highway Newport, Michigan 48166 l

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