ML20101R895

Interim Part 21 Rept PRD-83/12 Re Failure of Agastat GP Series Relays to Switch.Initially Reported on 841220.Safety Impact Rept Extension Requested Due to Delay in Ae Rept on Failure.Final Rept by 851130 Anticipated

ML20101R895
Person / Time
Site:	Grand Gulf
Issue date:	01/10/1985
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-PT21-85, REF-PT21-85-049-000 AECM-85-2-0001, AECM-85-2-1, PT21-85-049-000, PT21-85-49, NUDOCS 8502050097
Download: ML20101R895 (2)

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j MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi EdinilallddB P. O. B O X 164 0, J A C K S OlJ, MIS SIS SIP PI 3 9 2 0 5 January 1 19g N P l : 05 NUCLE AR LICEN$ LNG & SAFETY DEPARTMENT U. S. Nuclear Regulatory Commission Region II 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30323 Attention: Mr. J. P. O'Reilly, Regional Administrator

SUBJECT:

Grand Gulf Nuclear Station bnit 2 Docket No. 50-417 File: 0260/0511/0512 PRD-83/12, Interim Report for Unit 2, Failure of Agastat CP Series Relays to Switch AECM-85/2-0001

References:

1) AECM-83/0668, 10-17-83

2) AECM-83/0610, 9-22-83

3) AECM-83/0551, 9-6-83 On December 20, 1984, Mississippi Power & Light Company (MP&L) contacted Mr. R. Cartoll, of your office, and requested an extension for the submittal of a final response for the potential deficiency identified on Uni *. 2 in the reference 4 letters. The deficiency concerns the failure of Agastat GP series relays to change state when called upor to operate.

MP&L previously determined that the subject deficiency was reportable under the provisions of 10CFR21 for Unit 1. A final 10CFR21 report for Unit I was provided in Reference 1. In that letter we stated that applicability of this deficiency to Unit 2 was indeterminate at the time. Due to the nature of this potential problem (i.e., problem is tied to manufacturing date and specific usage) as described in the referenced letters, a determination as to the safety impact can not be completed until an inspection is performed at the resumption of construction activity.

Our architect engineer (Bechtel Power Corporation) has advised us that final disposition of this item should not be expected prior to October 4, 1985. This date is dependent upon the resusption of construction activities estimated in August of 1985 at Unit 2 after Unit 1 goes commercial (estimated March of 1985). Any delays in the Unit i schedule will likely impact the Unit 2 schedule.

Based on the above explanations, MP&L requested an extension for this response to a reasonable time past our architect engineer's expected final 8502050097 850110 gDRADOCK05o00 g COPY Mernber Midd:e South Utilities System -  !

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AECM-85/2-0001 MISSI22IPPI POWER & LIGHT COMPANY Paga 2 disposition date. Mr. Carroll agreed that this would be acceptable, but requested that we document this extension request in a letter to NRC Region II. MP&L expects to submit a final report for Unit 2 on this subject by November 30, 1985.

If there are any questions, please advise.

Yours truly, L. F. Dale Director EBS/SHH:rw

-Attachment cc: Mr. J. B. Richard Mr. R. B. McGehee Mr. N. S. Reynolds Mr. G.~ B. Taylor Mr. Richard C. DeYoung, Director

, Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 s

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