ML20205R919

Informs That Proposed Weld Overlay for Core Spray Safe Ends Will Be Inspected at Conclusion of Cycle 12 Per Epri/Nrc Criteria.Insp Plan for Overlays Will Be Submitted 3 Months Prior to Cycle 12 Outage

ML20205R919
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	06/02/1986
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	Muller D Office of Nuclear Reactor Regulation
References
FVY-86-49, NUDOCS 8606060017
Download: ML20205R919 (1)

Text

VERMONT YANKEE NUCLEAR POWER CORPORATION FVY 86-49 RD 5 Box 169. Ferry Road, Brattleboro, VT 05301

,,,ty yo.

p ENGINEERING OFFICE N

1671 WORCESTER ROAD FRAMINGHAM, MASSACHUSETTS 01701

=

June 2, 1986 mD' HONE 60-672-81M U.S. Nuclear Regulatory Commission Washington, D.C.

20555 Attn:

Office of Nuclear Reactor Regulation Mr. Daniel R. Muller, Director BWR Project Directorate No. 2 Division of Licensir.g

References:

a)

License No. OPR-28 (Docket No. 50-271) b)

Letter, VYNPC to USNRC, FVY 86-36, dated 5/5/86

Subject:

Core Spray Nozzle Weld Overlay By letter dated May 5, 1986 [ Reference b)], Vermont Yankee provided the proposed repair / design parameters to address and remedy the core spray safe end weld ultrasonic inspection indications of Intergranular Stress Corrosion Cracking (IGSCC).

In order to maintain our 1986 startup schedule, your imme-diate attention to this matter relative to the next cycle of operation (Cycle

12) is requested.

Vermont Yankee recognizes that the weld overlay proposed for the core spray safe ends is an interim solution and fully expects to replace the safe ends at a future optimcl time. Such a decision will be based upon schedular constraints, consistent with our future outage schedule, and results from inspections of the overlays, consistent with assuring required levels of safety are met.

I We intend to inspect the overlays at the conclusion of Cycle 12 in accor-dance with the EPRI/NRC weld overlay inspection criteria, and factor such results into our decision process as noted above. Additionally, we commit to provide you with our inspection plan for these weld overlays three months prior to the scheduled commencement date of our next (Cycle 12) outage for your review.

We trust that this informat' ion is satisfactory; however, should you have any questions or require additional information concerning this matter, please contact us.

i Very truly yours, DOCK O

71 AL sr-[L Warren P.

hy h-00(

Vice President and

/dm Manager of Operations 0

-