ML20009C589

Interim Deficiency Rept,Initially Reported on 800724,re Defective Corner & Lada Pipe Support Sway Struts.Addl Measures Are Being Taken to Preclude Disengagement of Paddle/Bushing Assembly

ML20009C589
Person / Time
Site:	Wolf Creek, Callaway
Issue date:	07/13/1981
From:	Seiken S STANDARDIZED NUCLEAR UNIT POWER PLANT SYSTEM
To:	James Keppler, Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
10CFR-050.55E, 10CFR-50.55E, SLNRC-81-57, NUDOCS 8107210248
Download: ML20009C589 (2)

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< so-mye, SNUPPS Stendardized Nuclear Unit Power Plant System 5 Choke Cherry Road Rockville, Marylend 20060 (301) 86dNB010 July 13,1981 SLNRC 81- 57 FILE: 0491.10.2/M-218C SUBJ: Corner & Lada Pipe Support Sway Struts: Significant Deficiency Report No. 80-3 Mr. James G. Keppler Director, Region III e@ d /g Office of Inspection and Enforcement ,

f U.S. Nuclear Regulatory Commission s, g 'f 799 Roosevelt Road s V yQ Glen Ellyn, Illinois 60137 Mr. Karl Seyfrit 4 k- -1 Director, Region IV U.S. Nuclear Regulatory Commission 9

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Suite 1000, Parkway Central Plaza ,

611 Ryan Plaza Arlington, Texas 76012 Wh e Ref: 1) SLNRC 80-32 dtd.7/24/80: Subj. as Above

2) SLNRC 80-49 dtd. 11/7/80: Subj. as Above Gentlemen:

Reference 1, as supplemented by Reference 2, forwarded to NRC a generic report covering defective Corner & Lada pipe support sway struts fur-nished to Callaway and Wolf Creek jobsites. Tne report indicated that specific sway struts would be inspected and tested for tightness prior to use-in order to confirm tightness of the paddle / bushing assembly. It was further indicated that struts found with loose bushings would be replaced.

r The purpose of this letter is to advise NRC that add'itional measures are being taken to preclude disengagement of paddle / bushing assembly.

These measures will provide for the use of conical shaped washers in all Size 2 and 3, Figure 631 sway struts. These washers are designed to prevent. disengagement of the bearing bushing from the rod paddle without jeopardizing specified design clearances and function. The use of washers is limited to the Size 2 and 3 units since other size N3 I units cannot physically accommodate such disengagement. On these other 5 j units, the inspection and testing indicated in the reference reports will continue.

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l 8107210248 810713 i PDR ADOCK 05000482 S PDR

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4 SLNRC 81 :

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. If you have further questions regarc'ng these additional actions, please advise.

Very truly yours, 7

S. J. Seiken.

Quality Assurance Manager i SJS:dck:8b30 i

cc: G. L. Koester, KGE

D. T. McPhee, KCPL J. K. Bryan, UE W. Hansen, NRC/Callaway T. Vandel, NRC Wolf Creek

J. Konklin, NRC Region-III

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Victor Stello, Jr. Director, Office of I&E, USNRC, Washington, D.C.

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