ML20217N448

Responds to 971110 Request for Assistance in Reviewing Technical Adequacy of Vermont Yankee Assessment & Repair of Structural Defects in Skid Mounted Piping for Edgs.Noted No Immediate Safety Concerns.Nrr Evaluation Encl

ML20217N448
Person / Time
Site:	Vermont Yankee
Issue date:	03/10/1998
From:	Thomas C NRC (Affiliation Not Assigned)
To:	Hehl C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20217N453	List: ML20217N448 ML20217N472 ML20217N491
References
TAC-MA0106, TAC-MA106, NUDOCS 9804090103
Download: ML20217N448 (1)

Text

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g f*"%k UNITED STATES

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NUCLEAR REGULATORY COMMISSION WAsNINGToN. D.C. 30806 4001 -

, March 10, 1998

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MEMORANDUM TO: Charles W. Hohl, Director l Division of Reactor Projects ,

Region i 1 FROM: Cecil O. Thomas, Director Project Directorate 6-3 geMO, a C Division of Reactor Projects- t/II l i

Office of Nuclear Reactor Regulation 1 l

SUBJECT:

PROPOSED TASK INTERFACE AGREEMENT (TIA) REGARDING l STRUCTURAL INTEGRITY OF

• SKID MOUNTED" PIPE i ASSOCIATED WITH EMERGENCY DIESEL GENERATORS AT I VERMONT YANKEE NUCLEAR POWER STATION, (TAC MA0106)

By memorandum dated November 10, igg 7, you requested our assistance in reviewing the technical adequacy of the Vermont Yankee assessment and repair of structural defects in the

" skid mounted" piping for the emergency diesel generators. We have completed our review  ;

which is documented in the attached memorandum. '

Based on our review, NRR has concluded that there are no immediate safety concems regarding i the near-term operability of the EDGs. However, NRR has identified a number of concems in the i structural analyses and metallurgical examinations performed by the licensee. Pending resolution of these concems, and further actions by the licensee to demonstrate long-term operability, NRR recommends augmented inspection of the EDGs during testing. We also  ;

recommend that Region I review the conclusions of our evaluation and the identified concoms j regarding long-term operability of the EDGs with the licensee to ascertain the licensee's '

intentions regarding its corrective action.

Attachment:

Memorandum did. 2/27/g8 cc: L. Plisco, Ril G. Grant, Rill i

T. Gwynn, RIV '

K. Perkins, RIV-WCFO l

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