ML20217H387

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Summary of 980407 Meeting W/Listed Attendees to Discuss Mods to Plant,Unit 3 Recirculation Spray Sys Described in Design Change Request M3-97045
ML20217H387
Person / Time
Site: Millstone 
Issue date: 04/16/1998
From: John Nakoski
NRC (Affiliation Not Assigned)
To:
NRC (Affiliation Not Assigned)
References
NUDOCS 9804290361
Download: ML20217H387 (17)


Text

Apr W 16 6998 LICENSEE:

Northsgst Nucisar Enargy Compan,y (NNECO)

FACILITY:_

Millstons Nucl:ar Power Station, Unit 3

SUBJECT:

APRll 7,1998, MEETINGIR GdkdihMODIFICATIONS TO THE MILLSTONE UNIT 3 RECIRgU TgSPpY SYSTEM v.,

On April 7,1998, the Special ProjechiDf$eTtaNYtNehi of Nuclear Reactor Regulation met with representatives from Nodheast Utilities (NU) and Sargent & Lundy in a publicly observed meeting to discuss modifications to the Millstone Unit 3 Recirculation Spray System (RSS) described in Design Change Request M3-97045, "RSS Pump Restriction Orifices to Prevent Suction Line Flashing." During postmodification testing, the system experienced higher than expected vibration. NU indicated the cause of the excessive vibration was unexpected cavitation downstream of the orifice plate. The vibration and cavitation resulted in damage to the downstream expansion joint liner.

NU discussed the purpose of the modification, options considered to resolve pump inlet line flashing, the time line for identification of cavitation problems, testing of the RSS modification, discovery of the failed expansion joint liners, the loose parts evaluation, options to resolve the failure of the expansion joint liners, and a description of revision 1 to the modification. NU indicated that, based on its examination of the damaged expansion joint liners, the possibility l

exists that up to nine slivers may not have been recovered. NU conducted a loose parts evaluation to assess the impact of the slivers on safe plant operation. NU concluded that if the slivers exist, there introduction, while undesirable, is acceptable and is not an unreviewed safety question.

NU's final resolution was to install a hard pipe section in place of the expansion joints. This caused an increase by a factor of five in one direction for the bending loads on the pump nozzles. While the nozzle loads increased substantially in one direction, NU stated that the pump vendor concluded that the pump nozzle loads were acceptable and that the pumps were operable. Also, the results of the postmodification testing indicated that overall system vibration decreased with the installation of the hard pipe section. provides a list of meeting attendees. Enclosure 2 provides the handout used by NU during the meeting.

l Original Signe4 byJ John A. Nakoski, ICAVP Program Coordinator l

lCAVP Oversight Branch l

Special Projects Office l

Office of Nuclear Reactor Regulation Docket No. 50-423

Enclosures:

As stated (2) cc w/encis: See next page,., u t J

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OFFICIAL RECORD COPY 9804290361 980416 PDR ADOCK 05000423 P

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l Northerst Nucirr En:rgy Comp:ny Millstons Nuciar Power Station Unit 3 cc:

l Lillian M. Cuoco, Esquire Mr. William D. Meinert Senior Nuclear Counsel Nuclear Engineer Northeast Utilities Service Company Massachusetts Municipal Wholesale P. O. Box 270 Electric Company Hartford, CT 06141-0270 P.O. Box 426 Ludlow, MA 01056 Mr. Kevin T. A. McCarthy, Director Monitoring and Radiation Division Joseph R. Egan, Esquire Department of Environmental Protection Egan & Associates, P.C.

79 Elm Street 2300 N Street, NW

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l Hartford, CT 06106-5127 Washington, DC 20037 Regional Administrator, Region l Mr. F. C. Rothen U.S. Nuclear Regulatory Commission Vice President - Work Services 1

475 Allendale Road Northeast Utilities Service Company King of Prussia, PA 19406 P. O. Box 128 Waterford, CT 06385 First Selectmen Town of Waterford Ernest C. Hadley, Esquire Hall of Records 1040 B Main Street 200 Boston Post Road P.O. Box 549 Waterford, CT 06385 West Wareham, MA 02576 Mr. Wayne D. Lanning Mr. John Buckingham Deputy Director of inspections Department of Public Utility Control Special Projects Office Electric Unit 475 Allendale Road 10 Liberty Square King of Prussia, PA 19406-1415 New Britain, CT 06051 Mr. M. H. Brothers Mr. James S. Robinson, Manager Vice President - Operations Nuclear investments and Administration Northeast Nuclear Energy Company New England Power Company P.O. Box 128 25 Research Drive Waterford, CT 06385 Westborough, MA 01582 Mr. M. R. Scully, Executive Director Mr. John Streeter Connecticut Municipal Electric Vice President - Nuclear Oversight Energy Cooperative Northeast Utilities Service Company 30 Stott Avenue P. O. Box 128 Norwich, CT 06360 Waterford, CT 06385 l

Mr. David Amerine Deborah Katz, President Vice President - Nuclear Engineering Citizens Awareness Network and Support P.O. Box 83 Northeast Utilities Service Company Shelburne Falls, MA 03170 P. O. Box 128 1

Waterford, CT 06385 l

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I North =t Nucizr Enirgy Company Millstone Nucinr Pow::r St: tion Unit 3 cc:

i Mr. Allan Johanson, Assistant Director Mr. Don Schopfer

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Office of Policy and Management Verification Team Manager Policy Development and Planning Sargent & Lundy

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Division 55 E. Monroe Street 450 Capitol Avenue - MS# 52ERN Chicago,IL 60603 l

P. O. Box 341441 l

Hartford, CT 06134-1441 Mr. J. P. McElwain Vice President (Acting) - Millstone 3 l

Citizens Regulatory Commission Northeast Nuclear Energy Company l

ATTN: Ms. Susan Perry Luxton P.O. Box 128 180 Great Neck Road Waterford, CT 06385 Waterford, CT 06385 Mr. G. D. Hicks The Honorable Teny Concannon Unit Director - Millstone Unit 3 Nuclear Energy Advisory Council Northeast Nuclear Energy Company Room 4035 P.O. Box 128

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Legislative Office Building Waterford, CT 06385 Capitol Avenue Hartford, CT 06106 Senior Resident inspector Millstone Nuclear Power Station l

Mr. Evan W. Woollacott c/o U.S. Nuclear Regulatory Commission l

Co-Chair P. O. Box 513 l

Nuclear Energy Advisory Council Niantic, Connecticut 06357 l

128 Terry's Plain Road Simsbury, CT 06070 Attorney Nicholas J. Scobbo, Jr.

Ferriter, Scobbo, Caruso, Rodophele, PC Little Harbor Consultants, Inc.

1 Beacon Street,11th Floor Millstone -ITPOP Project Office Boston, MA 02108 P.O. Box 0630 Niantic, CT 06357-0630 Mr. Martin L. Bowling, Jr.

Recovery Officer-Millstone Unit 2 Mr. B. D. Kenyon Northeast Nuclear Energy Company Chief Nuclear Officer - Millstone P.O. Box 128 Northeast Nuclear Energy Company Waterford, CT 06385-0128 P.O. Box 128 Waterford, CT 06385 I

Mr. Daniel L. Curry

' Project Director Parsons Power Group Inc.

2675 Morgantown Road Reading, FA 19607 l

l t

i LIST OF ATTENDEES

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April 7,1998 i

l l

NAME ORGANIZATION POSITION i

Eugene Imbro NRC Deputy Director, ICAVP Oversight, SPO, NRR Wayne Lanning NRC Deputy Director, inspection, SPO, NRR Steve Reynolds NRC Chief, ICAVP Oversight Branch, SPO, NRR Jacque Durr NRC Chief, inspection Branch, SPO, NRR Tony Cerne NRC Senior Resident inspector, Millstone Unit 3 Harold Eichenholz NRC ICAVP Site Coordinator, SPO, NRR Don Schopfer Sargent & Lundy Verification Team Manager Tony Neri Sargent & Lundy System Review Group Lead Ken Bass Sargent & Lundy Operations, Maintenance, and Testing Review Group j

Lead 1

i David Feingold Sargent & Lundy Lead RSS System Reviewer Jack Wakeland Sargent & Lundy RSS System Reviewer Paul Olson Sargent & Lundy Piping Design Reviewer

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Marty Bowling NU Recovery Officer, Millstone Unit 2 Raymond Necci NU Director, Configuration Management Plan Richard T. Laudent NU ICAVP Project Director Paul Grossman NU Millstone Unit 3 Director, Engineering Ray Deconto NU Millstone Unit 3 Design Engineering Enclocure 1

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