ML19225B134
| ML19225B134 | |
| Person / Time | |
|---|---|
| Site: | FitzPatrick  |
| Issue date: | 06/21/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Leonard J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK |
| References | |
| NUDOCS 7907230691 | |
| Download: ML19225B134 (1) | |
Text
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- [h c (y[c,i NUCLEAR REGULATORY COMMISSION
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UNITED STATES T7Th~
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,a e REGION I Nff.k o, f V[o[
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D KING oF PRUSSIA, PENNSYLVANIA 19406 Docket No. 50-333 Power Authority of the State of New York James A. FitzPatrick Nuclear Power Plant ATTN:
Mr. J. D. Leonard Resident Manager P. O. Box 41 Lycoming, New York 13093 Gentlemen:
Enclosed is IE Bulletin No. 79-02 Revision No. 1, which requires action by you with regard to your power reactor facility (ies) with an operating license or a construction permit.
Should you have any questions regarding this Bulletin or the actions required by you, please contact this office.
Sincerely, YW Boyce H. Grier Director
Enclosures:
1.
IE Bulletin No. 79-02 (Revision No. 1) 2.
List of IE Bulletins Issued in Last Twelve Months cc w/encls:
George T. Berry, Executive Director P. W. Lyon, Manager - Nuclear Operations A. Klausmann, Director, Quality Assurance M. C. Cosgrove, Quality Assurance Supervisor J. F. Davis, Chairman, Safety Review Committee L. R. Bennett, Assistant General Manager - General Counsel G. M. Wilverding, Licensing Supervisor 368 066 6\\
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7 907 23fM/
ENCLOSURE 1 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Bulletin No. 79-02 (Revision No. 1)
Date:
June 21, 1979 Page 1 of 5 PIPE SUPPORT BASE PLATE DESIGNS USING CONCRETE EXPANSION ANCHOR BOLTS Description of Circumstances:
Since the issuance of IE Bulletin 79-02 on March 8,1979, IE inspection M
experience and many inquiries from licensees indicate that additional informa-tion and clarification is needed.
This revision is intended to serve that purpose.
Nore of the requirements of the original Bulletin have been deleted, and the due date for completion of the requested actions (July 6, 1979) has not been changed.
The following text supersedes the text of Bulletin 79-02.
Changes from the original text are identified by lines in the margin.
The purpose of this revision is to identify acceptable ways of satisfying the Bulletin requirements.
While performing inservice inspections during a March-April 1978 refueling outage at Millstone Unit 1, structural failures of piping supports for safety equipment were observed by the 1icensee.
Subsequent licensee inspections of undamaged supports showed a large percentage of the concrete anchor bolts were not tightened properly.
Deficiency reports, in accordance with 10 CFR 50.55(e), filed by Long Island g
Lighting Company on Shoreham Unit 1, ir.dicate that design 'f base plates using m
rigid plate assumptions has resulted in underestimation 0: loads on scme o
anchor bolts.
Initial investigation indicated that nearly fifty percent of the base plates could not be assumed to behave as rigid plates.
In addition, licensee inspection of anchor bolt installations at Shoreham has shown over O
fifty percent uf the bolt installations to be deficient.
Vendor Inspection Audits by NRC at Architect Engineering firms have shown a wide range of design practices and installation procedures which have been employed for the use of concrete expansion anchors.
The current trends in the industry are toward more rigorous controls and verification of the instal-lation of the bolts.
The data available on dynamic testing of t
lIDUPLICATE DOCUMENT fatigue failures can occur at loads subst cities due to material imper actions or n r
also show low cycle dynamic fa' lures at 1 Entire document previously entered into system under:
due to joint slippage.
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- Lines indicate changes to prerious edit No. of pages:
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