ML20082B965
| ML20082B965 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 10/28/1983 |
| From: | Dise D NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, 7611, NUDOCS 8311210385 | |
| Download: ML20082B965 (2) | |
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NUMOHAWK Y NIAGARA NIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST, SYRACUSE. N.Y.13202/ TELEPHONE (315) 474-1511
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October 28, 1983 (7611) l Mr. R. W. Starostecki, Director U.S. Nuclear Regulatory Commission Region I Division of Project and Resident Programs 631 Park Avenue Kit.; of Prussia, PA 19406 Re: Nine Mile Point Unit 2 Docket No. 50-410
Dear Mr. Starostecki:
Enclosed is a final report in accordance with 10CFR50.55(e) for the problem concerning separation criteria for Power Generation Control Complex (PGCC) equipment. This condition was reported via telephone to Mr. J.-Wiggins of your staff on. auary 20, 1983 and was followed by interim ~ reports dated February 23, 1983 and August 9, 1983.
Very truly yours, D. P. Dise Vice President quality Assurance DPD/TL:ja
. Enclosure xc: Director of Inspection and Enforcement' U.S. Nuclear Regulatory Commission Washington, DC 20555 Mr. R. Gramm, Resident Inspector 0-l,
8311210385 831028
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Final Report for a Problem L
Concerning Separation Criteria for the Power Generation Control
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Complex _ (PGCC) Equipment i-t-
Description of the Deficiency i
A review by-Niagara Mohawk Quality Assurance identified that required notes concerning separation criteria, which appear on the system elementary diagrams, were-not included on.the. corresponding-connection diagrams or implemented in the connection diagrams wiring.
Therefore, these requirements.
werejnot incorporated into the PGCC hardware.
The electrical separation t
criteria notes concern the wiring of'certain power monitor and test relays.-
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Analysis of Safety Implications i
l This deficiency resulted from a General Electric Quality Control and Engineering failure-to identiff all separation _ criteria deficiencies prior.to shipment to the Nine Mile Point Unit 2 site.
There.is a possibility that if this problem.were to have remained' uncorrected, it could have adversely affected the. safe-' operation of the plant.. 'A detailed analysis _of Safety Implications was not performed.
Corrective Action General-Electric has added separation. notes'to several connection diagrams asL a result of this deficiency. Subsequent to this action, Niagara Mohawk j
Quality Assurance performed a review of all' safety related connection-diagrams requiring electrical separation and found the required separation notes.
i General Electric has corrected all the monitoring and tes't relay; wiring located at the General Electric' shop except for one relay.
The remaining
- relay will-be corrected at the Nine Mile l Point Unit 2 site by_ June 30, 1984;.
i As.a result of Niagara Mohawk's Quality. Assurance informing ' General Electric :
of' the electrical separation deficiencies in the as-shipped (PGCC modules, a.
paneliby panel : inspection lwas' performed at'the'~ site of all safety 'relatedi
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. panels for which electrical-separation is required. ; General-Electric Field.
Deviation-Disposition Requests-(FDDR's)-and Field.DispositionLInstructions;
.(FDI's):will be written to correct the separation deficiencies'..cThis rework.
l.
will:be completed by_. June.30 1984..
l-In order to prevent -recurrence of this: condition,4the followinglactions have ;
been taken in' General Electric's. manufacturing shop:
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.1. :The verification ~ofielectrica!~ separation-requirements in: Test.
InstructionsL(TI's)lisjow re' uired ' asia -backup to theLnorma1Einspection :
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of. panels toTassure thatill' separation requirements.are met.;
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- 2. - Round -table discussions
- (mini-training classes) have:oeen: held with.
I f Quality Control personnel)(inspectors tand!. testers) for the"purposefof __ -
i,I describing;the changessin~the Test-Instructions 5as-welllas reviewing the 4
- separationiinformation-wh'idh appears 7a's; notes lon theLdrawings.
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