ML20052D179

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Final Status Rept Re IE Bulletin 79-02,Revision 2.Insp & Testing of Expansion Anchor Bolts in All Identified Seismic Category I Piping Supports Completed on 800326
ML20052D179
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 04/22/1982
From: Gilberts D
NORTHERN STATES POWER CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
REF-SSINS-6820 IEB-79-02, IEB-79-2, NUDOCS 8205060339
Download: ML20052D179 (2)


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Northern States Power Company 414 Nicollet Mall Minneapoks, Minnesota 55401 Telephone (612) 330-5500 Monticello IMclear Generating Plant P.O. Box 600 Monticello, FIN 55362 April 22, 1982 / R>

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/ . 9 Director - Region III ' '~

Offim of Inspection ard Enforcement _&

Uniterl States tbclear Regulatory Corrnission 3 g 2 ***

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  1. j;;;J JE Glen Ellyn, Illinois 60137 Q 14 tionticello thclear Generating Plant GT PA Docket tb. 50-263 Iicenm tb. DPR-22

Dear Sir:

The following information is subnittal in response to IE Bulletin 79-02, Revision 2, item 8 which requires a final report upon canpletion of action.

Inspection an1 testing of expansion anchor bolts in all identified Seismic Category I piping supports was completed cn March 26, 1980. Ibdifications and repairs were completal on May 20, 1980. An alditional hanger was dis-coveral ard subsequently inspected, testal ard repaired on August 18, 1981.

Inspection of block walls in inaccessible areas was cor.pleted on Furch 12, 1980. This inspection revealed tlut no Seismic Category I piping supports are attachal.

In aldition to the supports reportal in our July 6,1979 suhnittal, three

r. ore supports were found to have a factor of safety less than two. These supports are as follows:

Hanger Ib. Systora Evaluation Cil 180 Cordensate supply Bechtel Power Corporation to RHR determined that tin system is operable wittout this support.

PS 30 thin Steam Bechtel Pcxer Corporation determinal that tin system is operable without this support.

PS 160 thin Steam Bechtel Power Corporation Equalizing Drain deternu.nal tint tin systan is operable withmt this support.

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8205060339 820422 e b PDR ADOCK 05000263 APR 3 01982 PDR t

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April 22, 1982

--Director - Region III

Page 2' Supports were upgradai as necessary to bring anchor bolt safety factors within Bulletin requirements.

This is our final subnittal regarding IE Bulletin 79-02. If aiditional infor-mation is required, pleam comunicate directly with plant managenent.

Very truly yours, fb d D.E.GiIberts,P.E.

Sr. Vice President Power Supply DEG/hdz c: US NRC Office of Inspection & Enforcement Division of Beactor Operations Inspection Washington, D.C. 20555 G Charnoff C 11 Brown 1

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