ML17256A915

Forwards Trip Rept of 820406 Visit to Facility Re Ruptured Tube Analysis

ML17256A915
Person / Time
Site:	Ginna
Issue date:	04/27/1982
From:	Crutchfield D Office of Nuclear Reactor Regulation
To:	Maier J ROCHESTER GAS & ELECTRIC CORP.
References
NUDOCS 8205120351
Download: ML17256A915 (5)

Text

yr April 27, 1982 Docket No. 50-244 LS05-82-04-075 Mr. John E. Maier, Qice President Electric and Steam Production Rochester Gas 8 Electric Corporation 89 East Avenue Rochester, New York 14649

SUBJECT:

R. E.

GINNA PLANT - TRIP REPORT, DISTRIBUTION Docket KWichman NRC PDR Local PDR ORB 'Reading JMeltemes, AEOD BGrimes DCrutchfield JLyons OELD OISE ACRS (1

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CYCheug RUPTURED TUBE ANAL Enclosed is a Trip Report prepared by our contractor, Franklin Research Center (FRC), pertaining to the captioned matter.

This report documents a meeting held in Rochester, New York between

NRC, FRC, Rochester Gas 5 Electric Corporation and Brookhaven National Laboratory representatives.

Sincerely, Original signed by Dennis M. Crutchfield, Chief Operating Reactors Branch ¹5 Division of Licensing Encl osur e:

Trip Report cc w/enclosure:

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Mr. John E. Maier CC Harry H. Voigt, Esquire

LeBoeuf, Lamb, Leiby and MacRae 1333 New Hampshire

Avenue, N.

W.

Suite 1100 Washington, D. C.

20036 Mr. Michael Slade 12 Trailwood Circle Rochester, New York 14618 Ezra Bialik Assistant Attorney General Environmental Protection Bureau New York State Department of Law 2 World Trade Center New York, New York 10047-U. S. Environmental Protection Agency Region II Office ATTN:

Regional Radiation Representative 26 Federal Plaza New York, New York 10007 Herbert Grossman, Esq.,

Chairman Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Ronald C. Haynes, Regional Administrator Nuclear Regulatory Commission, Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Resident Inspector R. E. Ginna Plant c/o U. S.

NRC 1503 Lake Road

Ontario, New York 14519 Director, Bureau of Nuclear Operations State of New York Energy Office Agency Building 2 Empire State Plaza

Albany, New York 12223 Supervisor of the Town of Ontario 107 Ridge Road West

Ontario, New York 14519 Dr. Emmeth A. Luebke Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Dr. Richard F. Cole Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.

20555

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'RIP REPORT To:

Ginna Nuclear Power Station Rochester Gas 6 Electric Company (RGB)

Date of Trip:

4/6/82 Project.'503-5257-001 FRC'Task:

l8000/l8552

Subject:

Ruptured Tube Analysis for Ginna (FRC Project No. C5257, Final Assignment l8)

Trip Made By:

L. Leonard NRC Staff Present:

G. Lainas, J. Lyons, R.

Zimmerman, W. S. Hazelton, C. Y. Cheug, K. R. Wichman RG&E Personnel Present:

R. Smith, R. C. Mecredy, A. E. Curtis III Brookhaven Natl. Labs.

Personnel Present:

C. Czajkowski, J.

R. Weeks The meeting which included personnel from NRC, RG6E, Brookhaven National Labs.,

and FRC was held so that RGaE could present its latest findings on'he tube failure problems at the Ginna facility; In addition, Brookhaven selected "samples for its own analysis.

RGGE reported on its own on-site investigation, which included fibre optic and TV scanning of tubes in situ and analysis of tubes that had been removed from,the generator, and on metallographic and fractographic analyses

~ performed by Westinghouse.'he postulated sequence of events leadimg to a tube bursting and the reactor shutdoWn was initiated by foreign object damage to some peripheral tubes at the bottom tube sheet.'he tubes either leaked or were. found defective during inspections and were plugged.

Subsequent damage to these tubes resulted in their failing at or near the bottom tube sheep and then'rubbing.against and wearing other in-service tubes which in turn were plugged.

Ultimately, one in-service tube wore so thin that it burst under the internal pressure, necessitating reactor shutdown.

. Westinghouse's results appear consistent with this scenario.

Brookhaven's testing will further critically evaluate all aspects of the tube degradation, and FRC will have the'opportunity of screening all of

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Brookhaven's samples both prior to and during the testing program.

This work must 'proceed.at a rapid pace since a group meeting is scheduled at Westinghouse on April.20 to compare all results and reach a conclusion on the failure modes and their root causes.

l)ll Franklin Research Center ADivfsion ofThe Fanldin &astute