ML20040A563
| ML20040A563 | |
| Person / Time | |
|---|---|
| Site: | Zimmer |
| Issue date: | 12/30/1981 |
| From: | Borgmann E CINCINNATI GAS & ELECTRIC CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-80 10CFR-050.55E, 10CFR-50.55E, QA-1537, NUDOCS 8201210245 | |
| Download: ML20040A563 (2) | |
Text
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THE CINCINNATI GAS & ELECTRIC COMPANY eN -
CINCINN ATI. OHIO 4 52o1 December 30, 1981 QA-1537 E. A. BoRGM ANN vaC C PRE S#DEh?
g\\@ -tm U. S. Nuclear Regulatory Commission Region III f
3r 3csiVED 799 Roosevelt Road 3
g Glen Ellyn, Illinois 60137
-fi J AN 2 01987.* {1 I Attention:
Mr. James G. Keppler, UNmaa Director c) g p
RE:
WM. H. ZIMMER NUCLEAR POWER STATION UNIT I 4
[
50.55(e) - ITEM M-26 HILTI ANCHORS, DOCKET No. 50-358, CONSTRUCTION PERMIT CPPR-88, i
W. O. #57300, JOB E-5590 - FILE NRC-8 l
Gentlemen:
i This letter constitutes a final report on the subject anchors.
On November 17, 1980, the Cincinnati Gas & Electric Company telephu '
Mr. Paul Barrett of the NRC, regarding a potential 10CFR50.55(e) condition i
concerning 1" diameter wedge-type expansion anchors.
5 i
Hilti Incorporated Fastening Systems decreased the recommended ultimrte 1
loads for 1" diameter anchors with embedded depth of 6D or greater, resulting in potentially under designed applications of these anchors.
Hilti subsequently t
filed a report in accordance with 10CFR Part 21.
After a detailed investigation, the architect-engineer identified 44 l
supports which utilize 1" diameter Ililti Kwik Bolt Anchors with an embedded length as reported by Hilti. These were the only supports utilizing 1" diameter Hilti Bolts of embedment greater than 6D.
Five supports required expansion anchor plate modifications; the remainder required no change.
Drawings for the following five supports have been revised and reissued:
[
1HPt91 SR HP-03 Sheet 53, Rev. B 2/27/81 1Ril759 SR RH-21 Sheet 80, Rev. C 2/27/81
.t IVC 070 HR VG-01 Sheet 85,-Rev. B 2/26/81 IVQO10 SR VG-01 Sheet 77, Rev. B 3/31/81 1WS036 SR WS-13 Sheet 35, Rev. C 3/20/81 1
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JAN 18 382 Si e!
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0 Mr. James G. Keppler U. S. Nuclear Regulatory Commission Region III December 30, 1981 - QA-1537 Page #2 We trust this fulfilla the requirements as a final report under 10CFR50.55(e).
Very truly yours, THE CINCINNATI GAS & ELECTRIC COMPANY 1-E. A. BORGMANN SENIOR VICE PRESIDENT FKP:ec ec:
NRC Resident Inspector Attn:
W. F. Christianson NRC Office of Inspection & Enforcement Washington, D. C. 20555