ML20125D762

Forwards Insp Rept 50-336/92-26 on 920830 & 1106 & Notice of Violation.Replacement Steam Generators Welding Met Applicable Industry Code & Std Requirements

ML20125D762
Person / Time
Site:	Millstone
Issue date:	12/04/1992
From:	Durr J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	Opeka J NORTHEAST NUCLEAR ENERGY CO.
Shared Package
ML20125D766	List: IR 05000336/1992026 ML20125D762 ML20125D775
References
NUDOCS 9212160021
Download: ML20125D762 (3)

See also: IR 05000336/1992026

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DEC 04 B32

Docket No. 50-336

Mr. John F. Opeka .

Executive Vice President - Nuclear

Northeast Nuclear Energy Company

P. O. Box 270

Hartford, Connecticut 06141-0270

Dear Mr. Opeka:

SUBJECT: NRC INSPECTION OF UNIT 2 STEAM GENERATOR REPLACEMENT,

NRC REGION I INSPECTION REPORT NO. 50-336/92-26

This letter refers to several inspections conducted by Mr. Herbert Kaplan,

Mr. Suresh Chaudhary, Mr. Joseph Carrasco and other members of our staff between

August 30 and November 6,1992, at the Millstone Nuclear Power Station - Unit 2, in

Waterford, Connecticut. These inspections focused on activities related to the replacement of

the steam generators at Millstone Unit 2. At the conclusion of each inspection, our findings

were discussed with members of your staff. The objective of these inspections was to verify

that the replacement of the Unit 2 steam generators was conducted in a thorough, technically

sound manner, and in accordance with applicable industry codes 'and standards.

Areas examined during the inspections are described in the enclosed inspection report.

Within these areas, the inspections consisted of selected examinations of procedures,

representative records, interviews with personnel, and observations by the inspectors. The

l- steam generator replacement project is important to safety because the steam generator tubes

and the connected reactor coolant system piping are one of the principal fission product

barriers. In general, the replacement steam generators welding met applicable industry code

and standard requirements. However, the initial analysis and evaluation of the reactor

coolant system piping movement appeared to be deficient. The preliminary results of the

improved stress analysis appear to be acceptable and indicate that the reactor coolant system

piping stresses are within code allowable limits. This item remains unresolved pending the

review of the final reactor coolant system pipe stress analysis.

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DEC 041392

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Mr. John F. Opeka 2

Based on the results of this inspection, it appears that two of your activities were not

conducted in full compliance with NRC requirements, as set forth in the Notice of Violation,

enclosed herewith as Appendix A. Two violations were identified regarding the

nondestructive examination performed using radiography. The first violation is the failure to

identify and disposition a linear indication on the radiographic evaluation report. The second

violation is the failure to follow the radiography procedure regarding back scatter of radiation

during radiography. Your response to this notice should follow the instructions provided in

the Appendix.

Your cooperation with us in this matter is appreciated.

Sincerely,

origimi ste,c3 en

Jacque P. Detrn

Jacque P. Durr, Chief

Engineering Branch

Division of Reactor Safety

Enclosure: NRC Region I Inspection Report No. 50-336/92-26 ,

cc vi/ encl:

W. D. Romberg, Vice President - Nuclear, Operations Services

S. E. Scace, Nuclear Station Director

J. S. Keenan, Nuclear Unit Director

R, M. Kacich, Director, Nuclear Licensing

D. O. Nordquist, Director of Quality Services

Gerald Garfield, Esquire

! Nicholas Reynolds, Esquire

l K. Abraham, PAO (2)

l Public Document Room (PDR)

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Local Public Document Room (LPDR)

Nuclear Safety Information Center (NSIC)

State of Connecticut SLO Designee

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DEC0413E

Mr. John F. Opeka 3

bec w/ encl:

Region I Docket Room ( vith concurrences)

DRS/EB SALP Coordinator

R. Blaugh, DRP

L. Doerflein, DRP

P. Swetland, SRI, Millstone

J. Raymond, SRI, Haddam Neck

R. Lobel, OEDO

G. Vissing PM, NRR

R. Ihrkley, DRP

A. Lee, NRR/EMED

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OFFICIAL RECORD COPY

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