ML19296F067

Responds to IE Bulletin 80-15.Mod to Emergency Notification Sys Completed 800813.Sys Presently Supplied W/Backup from Plant Security Diesel Generator.Util Expended 272 Manhours on Bulletin

ML19296F067
Person / Time
Site:	Vermont Yankee
Issue date:	08/28/1980
From:	Heider L VERMONT YANKEE NUCLEAR POWER CORP.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-80-15, WVY-80-120, NUDOCS 8010010817
Download: ML19296F067 (2)

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4e VERMONT Y AN KEE NUCLEAR POWER CORPORATION SEVENTY SEVEN GROVE STREET B.4.1.1 RUTLAND, VERMONT 05701

,,,cy yo , WVY 80-1:)

ENGINEERING OFFICE TURNPH<E RO Ao August 28, 1980 WESTBORO M ASS ACHUSETTS 01581 TELEPHONE 697 366-9011 United States Nuclear Regulatory Commission Office of Inspeerion and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention: Mr. Boyce H. Grier, Director

References:

(a) License No. DPR-28 (Docket No. 50-271)

(b) IE Bulletin 80-15

Subject:

Response to IE Bulletin 80-15

Dear Sir:

This letter is in response to reference (b) above, concerning the power supply to the ENS (Emergency Notification System).

On 6/26/80, it was determined that the ENS was powered from an on-site power supply without a battery backup and inverter or equally reliable power supply. The NRC Operations Center was notified via the ENS within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> as required.

Modification to the ENS power supply was completed on 8/13/80. The ENS now has a power supply with a backup from the plant Security Diesel Generator.

A test of the ENS (while powered from the plant Security Diesel Generator) was successfully completed on 8/13/80. During this test, a loss of the normal power supply to the ENS was simulated. The Security Diesel Generator started automatically and it was verified that all extensions of the ENS remained fully operable f rom our f acility to the NRC Operations Center.

As required by reference (b), plant procedure A.P. 0010 (Occurrence Report) now requires immediate notification (within one hour) to the NRC Operations Center upon the inoperability of one or more extensions of the ENS.

The following information is submitted in response to your request for G010020255'2

U. S. Nuclear Regulatory Commission Page Two Attention: Mr. Boyce H. Grier, Director August 28, 1980 estimates of manpower expended in the research and subsequent performance of actions associated with this bulletin.

Manpower Requirements Hours Bulletin Response 32 Corrective Actions 240 We trust the above supplied is satisfactory; however, should you desire additional information, please contact us.

Very truly yours, VERMONT YASTEE NUCLEAR POWER CORPORATION Y NYA/YRJ L. H. Heider Vice President COMMONWEALTH OF MASSACHUSETTS)

)ss.

COUNTY OF WORCESTER )

Then personally appeared before me, L. H. Heider, who, being duly sworn did state that he is a Vice President of Vermont Yankee Nuclear Power Corporation, that he is duly authorized to execute and file the foregoing request in the name and on the behalf of Vermont Yankee Nuclear Power Corporation, and that the statements therein are true to the best of his knowledge and belief.

lW R.' H. Groce, Notary Public My Commission Expires September 14, 1984

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