ML050280373

Summary of 09/29/2004 Meeting with Entergy on Steam Dryer Analysis for Vermont Yankee

ML050280373
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	02/14/2005
From:	Richard Ennis NRC/NRR/DLPM/LPD1
To:
Ennis R, NRR/DLPM, 415-1420
Shared Package
ML050550535	List: ML050280373
References
TAC MC0761
Download: ML050280373 (6)

Text

February 14, 2005 LICENSEE: Entergy Nuclear Vermont Yankee, LLC and Entergy Nuclear Operations, Inc.

FACILITY: Vermont Yankee Nuclear Power Station

SUMMARY

OF SEPTEMBER 29, 2004, MEETING WITH ENTERGY ON STEAM DRYER ANALYSIS FOR VERMONT YANKEE NUCLEAR POWER STATION (TAC NO. MC0761)

On September 29, 2004, a Category 1 meeting was held between the Nuclear Regulatory Commission (NRC) and representatives of Entergy Nuclear Vermont Yankee, LLC and Entergy Nuclear Operations, Inc. (Entergy or the licensee) at NRC Headquarters, One White Flint North 11555 Rockville Pike, Rockville, Maryland.

The purpose of the meeting was to discuss the Vermont Yankee Nuclear Power Station (VYNPS) steam dryer analysis. This analysis is being used to support Entergy's license amendment request for a 20% power uprate at VYNPS. The extended power uprate (EPU) request was submitted by Entergy to the NRC on September 10, 2003.

This meeting was a followup to meetings between the NRC and Entergy which were held on July 21 and July 22, 2004. The July meetings focused on the steam dryer analysis performed by General Electric Nuclear Energy (GENE) for Entergy. A meeting summary for those meetings was issued on September 2, 2004. At the July meetings, Entergy noted that they were also developing a plant-specific acoustic circuit analysis model for use in validating the GE analysis. The primary purpose of this meeting was to discuss the plant-specific program and the program results.

A portion of the meeting was closed to the public in order to discuss proprietary information associated with the steam dryer analysis. The list of attendees for the meeting is provided as . The slides used by Entergy and Entergys contractors contained proprietary information. A non-proprietary version of the slides was provided to the NRC by Entergys letter BVY 04-113 dated October 7, 2004, Technical Specification Proposed Change No. 263 -

Supplement No. 20, Extended Power Uprate - Meeting on Steam Dryer Analysis. A copy of those slides is included as Attachment 2.

Open Portion of Meeting Mr. Richard Ennis, Project Manager for VYNPS in the NRCs Office of Nuclear Reactor Regulation (NRR) Division of Licensing Project Management (DLPM), provided introductory remarks.

Mr. John Dreyfuss, Entergys Director of Engineering at VYNPS, discussed the information contained on slides 1 through 6. Mr. Dreyfuss acknowledged that use of a generic steam dryer load definition is problematic and, therefore, a plant-specific load definition is being developed for VYNPS.

Mr. Craig Nichols, Entergy's VYNPS power uprate Project Manager, discussed the information contained on slides 7 through 17. Mr. Nichols noted that Entergys contractor, Continuum Dynamics, Inc. (CDI) has developed an acoustic circuit model for determination of the plant-specific loads on the VYNPS steam dryer. In addition, another Entergy contractor, Fluent, has developed a computational fluid dynamics (CFD) plant-specific model for the VYNPS steam dryer and reactor vessel to assess the impact of vortex shedding. Mr. Nichols also briefly discussed the power ascension test plan that would be used for monitoring plant parameters to assess performance of the steam dryer during plant startup and operation at the proposed EPU power levels.

Members of the public were in attendance. There were no comments or questions from the public and no Public Meeting Feedback forms were received by the NRC staff.

Closed Portion of Meeting Mr. Brian Hobbs, VYNPS Engineering Supervisor, discussed the information contained on slide 18.

Mr. Don Johnson, VYNPS Design Engineer, discussed the information contained on slides 19 through 22.

Mr. Brian Hobbs discussed the information contained on slide 23.

Mr. Pedro Perez, VYNPS Senior Engineer, discussed the information on slides 23 through 34.

Mr. Alan Bilanin, President of CDI, discussed the information contained on slides 35 through 69.

Mr. Pedro Perez discussed the information contained on slides 73 through 85.

Mr. Dan Pappone of GENE discussed the information contained on slides 70 through 72.

Mr. Brian Hobbs discussed the information contained on slides 86 through 99.

Mr. Corneilus Holden, the NRCs Director of Project Directorate I in NRR/DLPM, provided the following NRC initial impressions regarding the steam dryer acoustic circuit model analysis:

! The NRC staff felt that the meeting was helpful in understanding the acoustic circuit model analysis. The NRC staff is looking for Entergy to put the information regarding the analysis on the docket.

! The NRC staff expectation is that the acoustic circuit model analysis will be bench-marked and would be able to accurately predict the loads on an actual dryer and/or test facility.

! The NRC staff needs information to be submitted to address out-of-phase loading on the steam dryer.

! The NRC staff felt that additional information needs to be provided regarding actions to be taken by the licensee if an increase in moisture carryover is observed.

! The NRC staff questioned the validity of the damping value being used for development of the response spectra in the VYNPS steam dryer analysis.

Mr. John Dreyfuss provided the following summary for Entergy:

! Entergy plans to docket the acoustic circuit model analysis information within the next two weeks.

! Entergy will submit non-proprietary and proprietary versions of the slides used during the meeting via a letter to the NRC.

! Entergy does not plan on docketing the CFD analysis being performed by Fluent; however, the licensee will consider whether it should be docketed.

Please direct any inquiries concerning this meeting to me. I can be reached at (301) 415-1420, or rxe@nrc.gov.

Richard B. Ennis, Senior Project Manager, Section 2 Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-271 Attachments:

1. List of Attendees

2. Slides cc w/atts: See next page

Package.: ML Meeting Summary: ML050280373 : ML : ML042890417 OFFICE PDI-2/PM PDI-2/LA EMEB/BC PDI-2/SC NAME REnnis CHawes for DTerao for DRoberts CRaynor EImbro DATE 2/14/05 2/9/05 2/11/05 2/14/05

Vermont Yankee Nuclear Power Station cc:

Regional Administrator, Region I Ms. Carla A. White, RRPT, CHP U. S. Nuclear Regulatory Commission Radiological Health 475 Allendale Road Vermont Department of Health King of Prussia, PA 19406-1415 P.O. Box 70, Drawer #43 108 Cherry Street Mr. David R. Lewis Burlington, VT 05402-0070 Shaw, Pittman, Potts & Trowbridge 2300 N Street, N.W. Mr. James M. DeVincentis Washington, DC 20037-1128 Manager, Licensing Vermont Yankee Nuclear Power Station Ms. Christine S. Salembier, Commissioner P.O. Box 0500 Vermont Department of Public Service 185 Old Ferry Road 112 State Street Brattleboro, VT 05302-0500 Montpelier, VT 05620-2601 Resident Inspector Mr. Michael H. Dworkin, Chairman Vermont Yankee Nuclear Power Station Public Service Board U. S. Nuclear Regulatory Commission State of Vermont P.O. Box 176 112 State Street Vernon, VT 05354 Montpelier, VT 05620-2701 Director, Massachusetts Emergency Chairman, Board of Selectmen Management Agency Town of Vernon ATTN: James Muckerheide P.O. Box 116 400 Worcester Rd.

Vernon, VT 05354-0116 Framingham, MA 01702-5399 Operating Experience Coordinator Jonathan M. Block, Esq.

Vermont Yankee Nuclear Power Station Main Street 320 Governor Hunt Road P.O. Box 566 Vernon, VT 05354 Putney, VT 05346-0566 G. Dana Bisbee, Esq. Mr. John F. McCann Deputy Attorney General Director, Nuclear Safety Assurance 33 Capitol Street Entergy Nuclear Operations, Inc.

Concord, NH 03301-6937 440 Hamilton Avenue White Plains, NY 10601 Chief, Safety Unit Office of the Attorney General Mr. Gary J. Taylor One Ashburton Place, 19th Floor Chief Executive Officer Boston, MA 02108 Entergy Operations 1340 Echelon Parkway Ms. Deborah B. Katz Jackson, MS 39213 Box 83 Shelburne Falls, MA 01370

Vermont Yankee Nuclear Power Station cc:

Mr. John T. Herron Mr. Ronald Toole Sr. VP and Chief Operating Officer 1282 Valley of Lakes Entergy Nuclear Operations, Inc. Box R-10 440 Hamilton Avenue Hazelton, PA 18202 White Plains, NY 10601 Ms. Stacey M. Lousteau Mr. Danny L. Pace Treasury Department Vice President, Engineering Entergy Services, Inc.

Entergy Nuclear Operations, Inc. 639 Loyola Avenue 440 Hamilton Avenue New Orleans, LA 70113 White Plains, NY 10601 Mr. Raymond Shadis Mr. Brian OGrady New England Coalition Vice President, Operations Support Post Office Box 98 Entergy Nuclear Operations, Inc. Edgecomb, ME 04556 440 Hamilton Avenue White Plains, NY 10601 Mr. James P. Matteau Executive Director Mr. Michael J. Colomb Windham Regional Commission Director of Oversight 139 Main Street, Suite 505 Entergy Nuclear Operations, Inc. Brattleboro, VT 05301 440 Hamilton Avenue White Plains, NY 10601 Mr. William K. Sherman Vermont Department of Public Service Mr. John M. Fulton 112 State Street Assistant General Counsel Drawer 20 Entergy Nuclear Operations, Inc. Montpelier, VT 05620-2601 440 Hamilton Avenue White Plains, NY 10601 Mr. Jay K. Thayer Site Vice President Entergy Nuclear Operations, Inc.

Vermont Yankee Nuclear Power Station P.O. Box 0500 185 Old Ferry Road Brattleboro, VT 05302-0500 Mr. Kenneth L. Graesser 38832 N. Ashley Drive Lake Villa, IL 60046 Mr. James Sniezek 5486 Nithsdale Drive Salisbury, MD 21801