ML19338D684

Final Deficiency Rept Re Potential Bolt head-pipe Clamp Interference Which Could Hinder Full Function of Bergen- Patterson Pipe Support Strut Assemblies.Bechtel Power Corp Advised That All Assemblies Corrected Prior to Shipment

ML19338D684
Person / Time
Site:	Callaway
Issue date:	09/10/1980
From:	Bryan J UNION ELECTRIC CO.
To:
References
10CFR-050.55E, 10CFR-50.55E, ULNRC-386, NUDOCS 8009230651
Download: ML19338D684 (2)

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union ELEcrnic COMPANY 1901 GRATIOT .TMEET

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'*f"f,70^" September 10, 1980 ,,, h;,*,$"[*,, ,,,,

Mr. James G. Keppler

'U. S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 ,

ULNRC- 386

Dear Mr..Keppler:

FINAL 10CFR50.55(e) REPORT BERGEN-PATERSON PIPE ~ SUPPORT STRUT WITH MECHANICAL SHOCK ARRESTOR CALLAWAY PLANT UNIT 1 Ref: ULNRC-368, 7/30/80 On July 2, 1980 we provided NRC Region III verbal notific_; ion of a 10CFR50.55(e) report regarding a potential bolt head-pipe clamp interference which could hinder the full function of Bergen-Paterson (B-P) pipe support strut assemblies containing Pacific Scientific mechanical shock arrestors. In the referenced letter we advised that information~we had received from B-P needed clarification and that we would submit a final report by September.30, 1980.

Enclosed is our final report covering this deficiency.

Ver truly yours, VN

,J John K. Bryan M(b RPW/sla Enclosure cc: H.'M. Wescott, Region III~

B. H. Grier, Region I Victor Stello, Jr., Directir Office I&E W. A. Hansen, NRC Resident Inspector Mo. Public Service Commission *

,K. V. Seyfrit, Region IV god Stll 800923066/i --

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. -10CFR50.55 (e) FINAL' REPORT . '

- EBERGEN-PATERSON' PIPE SUPPORT STRUT WITH MECHANICAL-SHOCK ARRESTOR CALLAWAY PLANT' UNIT l'

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INTRODUCTION.

Thisl final report, submitted in accordance with 10CFR50.55(e),

1 covers the resolution of.a1. problem regarding a potential bolt head-- .l pipeLclamp-interference which could hinder the; full function of Bergen-Paterson- (B-P) pipe 1 support strut assemblies containing -

Pacific Scientific mechanical ~ shock: arrestors. .This. deficiency.

i' was; initially reported by B-P in 'a 10CFR Part _21 report to: the NRC Region I Office'of, Inspection and Enforcement datsiJune 20, 1980.- Union Electric provided . verbal riotification to NRC Region III~on July 2,_1980 after receipt of'a letter from B-P listing a

_ number of affectedcassemblies that purportedly had been. shipped

.to-Callaway.

DESCRIPTION OF DEFICIENCY, A complete description of the deficiency is contained in the above mentioned 10CFR Part 21 report submitted by B-P.  !

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ANALYSIS 07 SAFETY IMPLICATIONS l i

The interference condition identI& f;ed by B-P could have -l inhibited pipe movement required by design sud caused overstressing. 1 of piping and' supports with adverse safety significance..

CORRECTIVE ACTION TAKEN'  !

By-letter to Bechtel Power Corporation dated August 14, 1980'B-P advised that all, assemblies.for Callaway Unit 1 were

' corrected prior to shipment. ,

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