ML17309A276

Summary of 820603 Meeting W/Util,Ornl & Westinghouse Re Loose Parts Monitor Alarms at Facility.Meeting Agenda & Handouts Encl

ML17309A276
Person / Time
Site:	Ginna
Issue date:	06/18/1982
From:	Lyons J Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8206280424
Download: ML17309A276 (33)

Text

1!-

00 June 18, 1982 Docket No. 50-244 LICENSEE:

Rochester Gas

& Electric Company FACILITY:

R. E. GiAna

SUMMARY

OF JUNE 3, 1982 MEETING WITH RG&E ON LOOSE PARTS MONITOR ALARMS AT GINNA On Thursday, June 3, 1983, members of the NRC staff and their consultants from Oak Ri'dge National Laboratory met with representatives of Rochester Gas

& Electric Company (RG&E) and Westinghouse to discuss the recent Loose Part f~onitor System (LPMS) alarms at Ginna.

Based on the evaluations of the LPMS 'data, RG&E and Westinghouse have concluded that the alarms are bot being caused by a foreign object interacting with the'team generator tubes.

The indications received (a few and widely spaced in time) are not characteristic of a loom part.

A copy of the slides used by RG&E during the presentati'on) and the attendance list are enclosed.

The meeting began with a general description of the Loose Parts Monitoring System that is permanently installed at Ginna and of the additional trans-ducers that have been installed to evaluate the recent alarms. 'he detection criter ia of the system and a chronology of events recorded during startup

~inhere discussed A number of the alarms have been correlated with plant operations (i.e., ',check. val;ve closings).

An analysis of the alarms not correlated with plant operations was presented by the Westinghouse analyst sent to Ginna to evaluate the alarms.

The Westinghouse representative concluded that the transducer time delays are indicative of noises at or near the shell of the steam generator rather than being generated from within the tube bundle.

By triangulation of the time de'l.'ays, the Westinghouse analyst was able to establish that the noises were coming from an arc 1 to 4 feet from the feedwater inlet nozzle at an elevation corresponding to the 5th support plai't; There are large mechanical connections (i.e. the support channgl between the wrapper and shell and the hydraulic snubbers) in this area.

The licensee postulates that the alarms, which have only been generated at very low (~3K)'ower levels, are a result of thermal transients experienced by one or more of the components in this area.

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Rochester Gas 8 Electric Company June 18, 1982 The NRC staff and its consultants agree with the licensee that the alarms are most probably not due to foreign objects.

The staff recommended,to RG5E that during the intermediate outage planned for 120 EFPD (about October 1982), visual inspections, b'e performed both inside and.outside the steam generator in the area where the noises are being generated.

In addition RG&E sho'uld analyze the amplitude data of the strip chart recordings in order to make some type of determination of the mass needed to generate the signals received.

RGSE plans to continue to monitor the LpHS closely and procedures have been developed to instruct the operators of the actions to be taken in the event of future a'Iarms.

The Resident Inspector will review the adequacy of the procedures.

Original signed by

Enclosures:

As stated James E. Lyons, Pr'biect NanRner

'perating. Reactors 'Branch 85 Division of Licensing OFFICEI SURNAME/

DATE IN DL. y b5 JLy ns.,cc bz./Eiaz,.....

DL 5

DC, chfiel

./. -/82 NRC FORM 318 (10-80) NRCM 0240 OFFICIAL RECORD COPY USGPO'981~r 960

- 4 l

Mr. John E. Maier June 18, 1982 CC Harry H. Voigt, Esquire

LeBoeuf, Lamb, Leiby and MacRae 1333 New Hampshire Avenue,'.

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 30007 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'503 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

ATTENDANCE LIST June 3, 1982 Jim Lyons Dennis Crutchfield Jim Hutton Bob Hecredy Bob Kryter Dwayne N. Fry George Danie'1's Bill Borland Larry Phillips Gene Hsii Carl H. Berlinger Harry Kister Len Ermold

.- W.-.Ciaramitaro John R. Smith John C.

Noon L. S. Rubenstein E.

C. Edgar T. Novak DL/NRC ORBS'5/DL/NRR RGE RGE ORNL ORNL RGE RGE CPB/NRR CPB/NRR

.CPB/NRR.

NRC Region I.

Westinghouse..

Westinghouse (SOD)

Westinghouse (SOD)

RGE NRC RGE DL/OR

GINNA STATION STEAM GENERATOR STARTUP EXPERIENCE NRC MEETING JUNE 3, 1982 AGENDA INTRODUCTION R.

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GINNA MIMS INSTALLATION

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,WESTINGHOUSE MIMS DESCRIPTION W.

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GINNA STARTUP EXPERIENCE G.

W. DANIELS o

DATA ANALYSIS J.

R.

SMITH o

CONCLUSIONS J.

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SIGNAL LOCATION event 1

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STEAN GENERATOR CONFIGURATION

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SIGNAL PhIPLITUDE NlFl'O AIKNE DEKCfI(5 SEfPONf.

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