ML20003A993

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Advises That,In Response to IE Bulletin 80-06,equipment Required to Effect Circuitry Mods to Engineered Safety Features Ordered & Received.Installation Delayed.Equipment Mods Should Be Completed by 810301
ML20003A993
Person / Time
Site: Millstone Dominion icon.png
Issue date: 01/05/1981
From: Counsil W
NORTHEAST NUCLEAR ENERGY CO.
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
A00921, A921, IEB-80-06, IEB-80-6, TAC-42756, NUDOCS 8102100164
Download: ML20003A993 (2)


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Docket No. 50-336 ., U A00921 - r tt JAN 3 01981 * @

Mr. Boyce H. Grier, Director ""^^"

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Region I g Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission /b "

631 Park Avenue King of Prussia, PA 19406

References:

(1) B. H. Grier letter to W. G. Counsil, dated March 13, 1980, transmitting I&E Bulletin No. 80-06.

(2) W. G. Counsil letter to B. H. Grier, dated June 13, 1980.

Gentlemen':

Millstone Nuclear Power Station, Unit No. 2 I&E Bulletin No. 80 Engineered Safety Features Reset Control In Reference (1), Northeast Nuclear Energy Company (NNECO) was requested to investigate the applicability of Staff concerns regarding the reset logic associated with all engineered' safety feature (ESF) components.

NNECO provided responses to Items 1 - 3 of Reference (1) in Reference (2). At the time of the Reference (2) correspondence, NNECO identified various com-ponents within the engineered safety features system, at Millstone Unit No. 2, whose circuitry did not meet the acceptance criteria delineated in Reference (1).

NNECO committed to modify the circuitry associated with the effected components to meet the requirements of Reference (1). These modifications were expected to be completed by January 1, 1981. In the interim, as reported in Reference (2),

all emergency operating procedures have been revised to appraise the operators of the equipment changes that occur upon reset of the ESF accident signals.

NUECO has ordered and received the required equipment to effect the circuitry modifications to the ESF system. However, installation of the components has been delayed as a result of an environmental qualification non-conformance. Upon dispositioning the non-confomance, NNECO . initiated installation of the required components.

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As a result of the delay, NNECO anticipates completion of the equipment modifications described in Reference (2) by March 1,1981.

As was reported above, the emergency operating procedures have been revised to alert the operator of equipment changes that occur upon reset of ESF accident signals. This will ensure that the plant will-be operated safely under all conditions until such time as the equipment modifications are com-pleted.

We trust you find this revised schedule responsive to the Reference (1)~

requirements.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY

/ Nl l.

W.' G. Counsil Senior Vice President i

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