ML20099C841

Responds to NRC Re Violations Noted in Insp Rept 50-410/84-13.Corrective Actions:S&W Field QC Revised Insp Plan for Mechanical Equipment Installation to Include Attribute for Fabrication Verification

ML20099C841
Person / Time
Site:	Nine Mile Point
Issue date:	11/09/1984
From:	Mangan C NIAGARA MOHAWK POWER CORP.
To:	Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
(NMP2L-0232), (NMP2L-232), NUDOCS 8411200089
Download: ML20099C841 (3)

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E NIAGARA RIONAWK POWER CORPORATION /300 ERIE BOULEVARD WEST SYRACUSE, N.Y.13202/ TELEPHONE (315) 474-1511.

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November 9, 1984 (NMP2L0232)-

4 Mr. R..W. Starostecki, Director >

U.. S( Nuclecr Regulatory Comission-

'RegionfI.

Division of-Project-and Resident-Programs.

- 631' Park Avenue

~ King of_ Prussia, PA:(19406 :

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NineL ile Point - Unit ~2

. Re:

M Docket No. 50-410 '

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Dear Mr.~Starostecki:

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Enclosed--is our_ detailed response to the Notice ' of Violation - dated -

October 10, 1984 and the accompanying Inspection Report No. 50-410/84-13.

Very truly yours, C. V. Mangan Vice President Nuclear Engineering and Licensing

-CYM/GG/dd

- Enclosure

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R. A. Gram, NRC Resident Inspector Project File (#0447H) 8411200089 841109 PDR ADOCK 05000410 0

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NIAGARA 1 MOHAWK POWER ? CORPORATION 2

NINE! MILE 1POINTt-UNITJ2J

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' ? DOCKET NO.L50-410;

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.. LResponseito Notice of Violation L 1attacheditot NRC Inspection Report Non50-410/84-13

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. _ [ Violation 1:

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'110CFR50, jap'pendixH B; LCriterion LXJand~ XV, 'and. the~ Nine Mile Point,HUnit 2l

{PSAR,1; Sections 1:17.D.3.11 and fl7.D.3.16, l:: require ;that D Enfinspection; 1 program :be: (implementedf sto lverifyi the-: conformance cof : hardware -

sinsta11ations to f design. requirements, sand D furtherb that9 instances L of -

i 3 nonconfoming '. conditions Jshallt;bei identified-ffor { ' evaluation-,and.

disposition 'inTaccordance with established procedu_res. ; Stone:and; Webster 5 1

' Engineering : Corporation procedure QS L15.11 defines i the: nonconfomance Land ' ~

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disposition 7 report to c be ;the Lappropriate vehiclejto document situations 4

' in.which ' engineering evaluation and dispost tion:is Traquired. -

-i Contrary to ths ;abovek the?1icensee was. informed on'. September 6,11984,.

that inadequatezvendorfinspection had :been conducted on:the' ASMEL Service Water strainers l4A cthrough 14Fi as thel strainer top 1 bolts.were noti fully engaged Tin ?accordance n with ? ASME E ND-4711( and the ~ component N-2 ; data'

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' The nonconforming' condition -had been 'identifled,to -Stone Eand reports.

Webster ? Engineering Corporation = and an erroneous 1 disposition - had been provided by engineering;on an interofficeicorrespondence :in lieu ;of the'.~

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- requisite' nonconformance,and disposition report. '

Thistis a Severity Level.-IV' Violation (Supplement II0.

,The following is submitted in response' to this violation:-

ASME

Section ND-4711 states "the threads _ of all bolts or studs -shall 'be

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engaged in accordance with the design."

The Service Water Self-Cleaning

Strainer design assumed full thread engagement for. the cover bolting.

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r Full' thread engagement could not be achieved with!the bolts installed on the strainers.

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. The documentation checklist accompanying Zurn Industries design drawing I-770207-A:Rev. C identifies the: cover bolts as 7/8-9X51/4" HHCS SA193 B7.. The bolts supplied with the strainers were in. accordance with the L

-documentation checklist.

The N-2. data report, however, conflicts with l

the ' documentation checklist in that 51/2"-long bolts were identified.

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Zurn's Qualit'y Assur:nc6 Prtgram, the' Authorized! Nuclear Inspect:r and

'Es l Stone & Webster's-Procurement Quality Assurance: failed to identify that

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the installed' bolting material-could not provide. full;th ead engagement.

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In' addition, the discrepancy between the N-2

datatreport and the design.

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.l document was not identified.

-Thejlack of-full thread: engagement was' brought to the attention of Stone &

Webster: Site Engineering Group.by.ITT.Grinnell. At that-time, the Stone &

Webster-field engineer! conducted a review'of design. documents _available'on site:for construction and responded to ITT Grinnell~with an interoffice correspondence.. As.noted above, the bolts.in question were in accordance

with thel design document, and consequently the condition was'not

? recognized as nonconforming.

Corrective and: Preventive ~ Action' Nonconformance and' Disposition Report No. 8974 has been' issued to document the discrepancy between-the N-2 data. report and ;the strainer cover bolts-

'as well as the lack of. full thread engagement. 'The Nonconformance &.

Disposition Report has been dispositioned " accept-as-is" for the lack of thread engagement ~ based on revised. design calculations'which show that the' ithread engagement' achieved.is satisfactory for the specified service.. The N-2 data. report will be revised.to reflect the acceptable bolts.

Stone & Webster Procurement Quality Assurance will add an inspection-

' attribute to-inspection plans for mechanical equipment to require

verification of thread engagement... Stone & Webster Field Quality. Control has revised the inspection plan for mechanical equipment installation to include an attribute for fabrication' verification.

Schedule Full compliance wil1.be achieved by: January.1, 1985.-

Violation 2 The Notice ~of Violation specifically indicates-that no written response is required at this time due to Niagara-Mohawk's extensive corrective actions during the conduct of Inspection No. 84-13.

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