ML20210M579

Responds to NRC 990726 Telcon Re Status of Resolution for USI A-46 Outliers.Written Summary,By Equipment Category, Listed

ML20210M579
Person / Time
Site:	Vermont Yankee
Issue date:	07/30/1999
From:	Leach D VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR BVY-99-99, NUDOCS 9908100121
Download: ML20210M579 (3)

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VERMONT YANKEE y, ,

NUCLEAR POWER CORPORATION 185 Old Ferry Road, Brattleboro, VT 05301-7002 l (802) 257-5271 i I

July 30,1999 BVY 99-99 j U.S. Nuclear Regulatory Commission ATfN: Document Control Desk Washington,DC 20555

References:

(a) Letter, VYNPC to USNRC, " Response to Request for Additional Information l Regarding Resolution of Unresolved Safety Issue A-46," BVY 98-99, dated July 17,1908.

(b) Letter, VYNPC to USNRC," Vermont Yankee Summary Report for Resolution of I USI A-46," BVY 96-86, dated July 1,1996. l l

Subject:

Vermont Yankee Nuclear Power Station License No. DPR-28 (Docket No. 50-271)

Response to Request for Information Regarding the Status of Resolution for USI A-46 Outliers I I

During a telephone conversation between the NRC and Vermont Yankee (VY) on July 26,1999, the Staff requested VY to provide a written summary, by equipment category, of the status of efforts to resolve the remaining A-46 outliers, as discussed during the course of the conversation. The schedule for completion (prior to staitup from the 1999 refueling outage) was originally provided in Reference (b) and was reaflirmed in Reference (a). The following text supplies the requested information.

Electrical Eauipment l

For the physical modifications that will be made to station electrical equipment, the majority of the design packages have been prepared, reviewed and approved by station management, and the installation and test ,

procedures have been written. Certain of these modifications may be implemented while the plant is on-line, but others can only be performed when shut down.

Mechanical Eauipment Approximately 80% of the required physical modifications have been completed, and the remaining 20%

are in the modification package development stage.

Cable Trays The required physical modifications have been conceptually scoped and walkdowns have been completed.

The modification packages are presently under development.

t 9908100121 990730 DR ADOCK 0 21

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[ Yacusiost YAshi.ir. Na ci.itAii l'ower.n Colu onAlios BVY 99-99 / Page 2 Tanks and Heat Exchanners Physical modifications have been completed on two Diesel Fuel Oil Day Tanks, and remain to be done on the High Pressure Coolant Injection (HPCI) Gland Seal Condenser and Exhauster. The HPCI modification pckage has been prepared, reviewed and approved by station management, and the installation and test procedures are being written.

Refined analysis has been performed and is currently being checked for the Residual Heat Removal (RHR)

Heat Exchangers (>md the RHR Pumps, Core Spray Pumps and RHR Service Water Pumps).

l Relays All but one (1) of the outlier relays have been resolved. The remaining outlier requires a physical modification. Conceptual scoping and walkdown for the modification have been completed, and the modification package is being developed.

l These efforts are on track to be completed by the end of the Fall 1999 refueling outage, scheduled to begin on October 29,1999 with a planned duration of thirty-five (35) days.

i We trust that the information provided will enable you to complete your review of Reference (b); however, l should you have any questions on this matter, please contact Mr. Wayne M. Limberger at (802) 258-4237. i Sincerely,

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VERMO . 'EE NUCLEAR POWER CORPORATION

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V' e P sident, Engineering cc: USNRC Region I Administrator USNRC Resident Inspector- VYNPS USNRC Project Manager-VYNPS VT Department ofPublic Service i

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SUMMARY

OF VERMONT YANKEE COMMITMENTS BVY NO.: h99-99 The following table identifies commitments made in this document by Vermont Yankee. Any other actions discussed in the submittal represent intended or planned actions by Vermont Yankee. They are described to the NRC for the NRC's information and are not regulatory commitments. Please notify the Licensing Manager of any questions regarding this document or any associated commitments.

COMMITMENT COMMITTED DATE OR " OUTAGE" None. Reaffirms commitments made in Vermont Ysnkee letter BVY 96-86 (July 1,1996) and confirmed in BVY 98-99 N/A (July 17,1998).

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