ML20077D541
| ML20077D541 | |
| Person / Time | |
|---|---|
| Site: | Zimmer |
| Issue date: | 07/18/1983 |
| From: | Williams J CINCINNATI GAS & ELECTRIC CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, LOZ-83-0087, LOZ-83-87, NUDOCS 8307260556 | |
| Download: ML20077D541 (2) | |
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THE CINCINNATI GAS & ELECTRIC COMPANY W
CINCINN ATI, OHIO 45201 July 18, 1983 LOZ-83-0087 J. WILLI AMS, J R j
SENIOR VICE MES4 DENT NuctE*n onnam3NS Docket No. 50-358 U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention:
Mr. J.G. Keppler Regional Administrator Gentlemen:
RE:
WM. H.
ZIMMER NUCLEAR POWER STATION - UNIT 1 10CFR50. 55 (e), ITEM S BERGEN-PATTERSON EA-3 PIPE CLAMP INCORRECTLY USED IN SUPPORT DESIGN W.O.
57300, JOB E-5590, FILE NO. 956C, S-12 This letter constitutes an interim report concerning the subject condition initially reported to the Commission on June 20, 1983 as a potentially reportable deficiency under the requirements of 10CFR50.55 (e).
The deficiency was identified as a result of a 10CFR Part 21 evaluation reported by Bergen-Patterson Pipe Support Corporation concerning misapplication of their standard "EA-3" pipe clamp.
Bergen-Patterson Catalog #66 did not specify at what angle or rotation the EA-3 clamp attachment could be installed for clamps having an off-axis load direction.
Bergen-Patterson has since specified a 6 degree skew angle.
A review of all Zimmer safety-related pipe-support drawings identified fifteen clamps having an off-axis load direction.
As such, the misapplication of the clamps could potentially affect the safe operation of the facility.
The systems that may be affected are:
Main Steam (ftS) ;
Reactor Water Clean-up (RT); and Reactor Building Closed Cooling Water (WR).
As a result of this review CG&E has determined the item to be reportable under 10CFR50.55 (e).
In lieu of extensive analysis and/or testing to determine if the clamps could perform their intended function as designed, the design and/or installation tolerances will be revised such that the final installation would be within the manufacturer's 6 degree allowable skew angle.
Failing this, an alternate clamp will be specified.
Mb 8307260556 830718
{DRADOCK05000 iin
f Mr. J.G. Keppler Regional Administrator July:18, 1983 LOZ-83-0087 Page.2 The resolution of the corrective action for.the fifteen EA-3 pipe clamps identified as having an off axis load direction is summarized as'follows:
3 supports have skew angles within~the 6 degree ~ allowable as designed; 6 require revised installation tolerances;'5 require revised designs; and 1 requires an alternate clamp to be specified.
All revised support drawings will be issued,by July 15, 1983 and a follow-up report will be submitted by August 25, 1983.
We trust the above will be found acceptable as an interim report under 10CFR50.55 (e).
Very truly yours, THE CINCINNATI GAS & ELECTRIC COMPANY h
4 $n _ - - /
By WILLIAMS, JR.
ENIOR VICE PRESID T
DJS/JAN/sfr cc:
NRC Office of Inspection & Enforcement j
l Washington, D.C.
20555 NRC Senior Resident Inspector ATTN:
W.F. Christianson NRC Zimmer Project Inspector, Region III ATTN:
E. R. Schweibinz i
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