ML20039C461

Interim Deficiency Rept Re Failure of Bergen Paterson Size 6 & 15 Sway Strut Assemblies to Provide cone-of-movement, Initially Reported 811104.Tests & Related Analyses Completed.Failures Not Reportable Under 10CFR50.55(e)

ML20039C461
Person / Time
Site:	Wolf Creek, Callaway
Issue date:	12/14/1981
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-81-128, NUDOCS 8112290376
Download: ML20039C461 (2)

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SNUPPS Standardized Nuclear Unit Power Plant System 5 Choke Cherry Road Rockville, Maryland 20850 (301)869-8010 December 14, 1981 SLNRC 81-128 FIl.E: 0491.10.2/M-218A SUBJ: Bergen Paterson Pipe Supports:

Significant Deficiency Report N Mr. James G. Keppler Director, Region III Office of Inspection at.d Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road N Glen Ellyn, Illinois 60137 g 4~

O Mr. Karl Seyfrit C/ c Director, Region IV c U.S. Nuclear Regulatory Commission -

DECp'"o ~d .

• Suite 1000, Parkway Central Plaza g 611 Ryan Plaza Arlington, Texas 76012 ,

/

Ref: SLNRC 81-121 dtd. 11/4/81: Subj. as Above N g' Gentlemen:

The reference letter informed NRC of a delay in submittal of the subject report concerning the failure of Bergen Paterson Size 6 and 15 sway strut assemblies to provide the cone-of-movement required by design specifica-tions. The reference letter further indicated that tests would be per-formed simulating worst case installation in order to assess the safety significance of the reported failures and that a final report on this matter would be available for NRC review in early December.

The purpose of this letter is to advise NRC that the tests and related analyses indicated in our Nov. 4th letter have been completed and the results examined by Bergen Paterson, Bechtel and SNUPPS. On the basis of load tests performed, it is concluded that the sway strut assemblies installed with no cone-of-movement would not, if left uncorrected, result in a significant safety problem as defined under 10CF?50.55(e) criteria.

These tests and studies further indicate that the snubber would carry the maximum design load and would not restrict movement of the associated piping to a level that could produce a f ailure in the piping system. On the basis of these tests, the Oct. 9th telecon report that these failures represent a reportable deficiency as defined in 10CFR50.55(e) is hereby withdrawn. Data supporting the basis for our conclusion and actions in this matter is available for NRC review. It should be further noted that these f ailures, although not considered to be a reportable Signifi-cant Deficiency, are being processed in accordance with existing 8112290376 811214 OEC Q 1 jggj q#

PDR ADOCK 05000482 y S PDR

, SLNRC 81- 128 Page Two nonconformance control procedures and that the referenced interferences are being resolved through Bergen Paterson design modification and/or rework at the SNUPPS jobsites locations.

If you have any questions regarding this matter, please contact the undersigned.

Very truly yours, S. J. Seiken, Manager Quality Assurance SJS:dck:13bl cc: G. L. Koester, KGE D. T. McPhee, KCPL D. F. Schnel1, UE W. Hansen, NRC/Callaway T. Vandel, NRC Wolf Creek J. Konklin, NRC Region III Victor Stello, Jr. Director, Office of I&E, USNRC, Washington, D.C.

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