ML20196J411

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Summary of 990524 Meeting with Util in Rockville,Md to Discuss Technical Issues Re Proposed Rerack of Spent Fuel Pool at Plants.List of Attendees & Handouts Encl
ML20196J411
Person / Time
Site: Byron, Braidwood  Constellation icon.png
Issue date: 06/30/1999
From: Stewart Bailey
NRC (Affiliation Not Assigned)
To:
NRC (Affiliation Not Assigned)
References
NUDOCS 9907070267
Download: ML20196J411 (57)


Text

3 June 30, 1999 v

LICENSEE: Commonwealth Edison Company FACILITY: Braidwood Station and Byron Station i

SUBJECT:

SUMMARY

OF MAY 24,1999, MEETING WITH COMMONWEALTH EDISON COMPANY REGARDING RERACK OF SPENT FUEL POOLS AT BRAIDWOOD AND BYRON STATIONS

' As announced on May 3,1999, a meeting was held with Commonwealth Edison Company ,

(Comed, the licensee) on May 24,1999, at NRC Headquarters, to discuss technical issues related to the proposed rarack of the spent fuel pools at Braidwood and Byron Stations. Holtec intemational, the vendor for the new storage racks, also attended to present various technical issues. Enclosure 1 is a copy of the attendance list. Enclosure 2 is a copy of the handouts and overheads.

The topics included the following: .1) the effects on plant systems of the inciaisse in storage capacity; 2) personnel exposure during the rerack activities, including as low as reasonably achievable (ALARA) practices; 3) considerations of moving heavy loads; and 4) seismic analysis.

Comed also discussed the review schedule. In order to support plant operations, Comed requested that the review be completed before February 2000. Comed stated that they must begin plant modifications in February 2000 in order to complete the modifications and subsequent receipt of new fuel in time for the ninth refueling outage for Byron, Unit 1, which is-

scheduled to begin in September 2000.

Original signed by Stewart N. Bailey, Project Manager, Section 2 9907070267 990630 v Project Directorate ill PDR ~ADOCK 05000454 Division of Licensing Project Management P PDR Office of Nuclear Reactor Regulation Docket Nos. STN 50-454, STN 50-455, STN 50-456, STN 50-457

).

Enclosures:

As stated cc w/encis: See next page Distribution: '

Hard Coov sessket**

E-Mail L. Kopp (LIK) J. Zwolinski(JAZ)/S. Black (SCB) KManoly gfO)

PUBLIC G. Dick (GFD) C. Thomas (COT)/A. Mendiola (AJM) HAshar ACRS, T2E26 - M. Jordan (MJJ) G. Grant (GEG), Rlli DDiec l LPD3 r/f RTadesse ' OPA (E-mail to OPA BThomas OGC THiltz R. Pichumani(RXP) R. Rothman (RLR)

S. Bailey DOCUMENT NAME: G:\PDlli-2\ braid-by\mtsa5070.wpd To receive a copy of this document, Indicate Je the ing: 'C" = Copy without enclosures "E" = Copy with enclosures *N" = No cg OFFICE LPD3:PM C. l.Plbl:iA N LPDill:PNI f. E SC:l# Dill l NAME SBailey KA6 CW6re\ GDick f)& AIMdddia l

, DATE 06#8/99 06/4/99 06/4 99 0 &i/99 FFICIAL RECORD COPY 070013 [

i 3

9 Byron /Braidwood Stations .

cc:

Mr. O. Kingsley, President George L. Edgar Nuclear Generation Group Morgan, Lewis and Bochius Commonwealth Edison Company 1800 M Street, N.W.

Executive Towers West lil Washington, DC 20036 1400 Opus Place, Suite 500 Downers Grove, Illinois 60515 Ms. Bridget Little Rorem Appleseed Coordinator Ms. C. Sue Hauser, Project Manager 117 N. Linden Street Westinghouse Electric Corporation Essex,lilinois 60935 Energy Systems Business Unit Post Office Box 355 Attomey General Pittsburgh, Pennsylvania 15230 500 S. Second Street Springfield, Illinois 62701 Joseph Gallo Gallo & Ross Illinois Department of Nuclear Safety 1025 Connecticut Ave., N.W., Suite 1014 Office of Nuclear Facility Safety Washington, DC 20036 1035 Outer Park Drive Springfield, Illinois 62704 Howard A. Learner Environmentallaw and Policy Commonwealth Edison Company i Centerof the Midwest Byron Station Manager 35 East Wacker Dr., Suite 1300 4450 N. German Church Road Chicago, Illinois 60601 Byron, Illinois 61010-9794 U.S. Nuclear Regulatory Commission Commonwealth Edison Company Byron Resident inspectors Office Site Vice President - Byron  ;

4448 N. German Church Road 4450 N. German Church Road  ;

Byron, Illinois 61010-9750 - Byron, Illinois 61010-9794 Regional Administrator, Region lil U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission Braidwood Resident inspectors Office 801 Warrenville Road RR 1, Box 79 Lisle, Illinois 60532-4351 Braceville, Illinois 60407 Ms. Lorraine Creek Ms. Pamela B. Stroebel RR 1, Box 182 Senior Vice President and General Counsel Manteno, Illinois 60950 Commonwealth Edison Company P.O. Box 767 Chairman, Ogle County Board Chicago, Illinois 60690-0767 Post Office Box 357 Oregon, Illinois 61061 Mr. David Helwig

. Senior Vice President Mrs. Phillip B. Johnson Commonwealth Edison Company 1907 Stratford Lane Executive Towers West 111 Rockford, Illinois 61107 1400 Opus Place, Suite 900 Downers Grove, Illinois 60515

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- Byron /Braidwood Stations .

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l. Mr. Gene H. Stanley Commonwealth Edison Company l PWR Vice President Reg. Assurance Supervisor- Byron l Commonwealth Edison Company 4450 N. German Church Road Executive Towers West lil Byron, Illinois 61010-9794 l ' 1400 Opus Place, Suite 900 l Downers Grove, Illinois 60515 Commonwealth Edison Company Reg. Assurance Supervisor- Braidwood Mr. Christopher Crane RR 1, Box 84 BWR Vice President Braceville, Illinois 60407-9619 Commonwealth Edison Company Executive Towers West lli 1400 Opus Place, Suite 900 Downers Grove, Illinois 60515 Mr. R. M. Knch Vice President - Regulatory Services Commonwealth Edison Company Executive Towers West til 1400 Opus Place, Suite 500 Downers Grove, Illinois 60515 Mr. Ron Stephens lilinois Emergency Services and Disaster Agency 110 E. Adams Street Springfield, Illinois 62706 Chainoan Will County Board of Supervisors Will County Board Courthouse .

Joliet, Illinois 60434 Commonwealth Edison Company Braidwood Station Manager RR 1, Box 84 Braceville, Illinois 60407-9619 Document Control Desk-Licensing Commonwealth Edison Company 1400 Opus Place, Suite 400 Downers Grove,ll;inois 60515 Cominonwealth Edison Company Site Vice President- Braidwood RR 1, Box 84 Bracemille, Illinois 60407-9619 u _ _ _ _ _ . . _ _ _ _

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3.0 . VAT.TDATION PLAN 3.1' Validation Problema This section sets forth a validation plan for DYNARACK that meets the intent of Reference (3.1]. For a comprehensive ' validation, problems are chosen to test various aspects of the code. Table 3.1 delineates idun items to be considered in the validation process.

Table 3.1 VALIDATION ITEMS ACRONYM FOR ITEM VALIDATION MATRIX Central Difference Algorithm CDAL Inertial Coupling ICPL Forcing Function Input FFIN Simulation of Impact SIMP Simulktion of Friction SFR1 Simulation of Elastic Beans SBEA Simulation of Classical Phenomena SCPH Fluid Coupling Phenomena FCPH-Data Input DATA Convergence CVNG ,

A series of validation problems whose solution is known, or can be determined by alternate means is defined in Table 3.2. Each problem is defined by number, title, and type. These problems are

' discussed further in the individual report sections to follow. l l

6 m s . ..-.-(-. . . - . - . . - - ., , -

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  • Tcble 3.2 PROBLEM DESCRIPTION NUMBER ITJJd TYPE
  • 1 Lumped Mass Impacting a Simply ANS, SELF i Supported Beam 2 -

Cantilevered beam with gap ANS support subject to time varying j force '

3 Elastic Wave Propagation in a bar EAA  !

4 Two degree-of-freedom linear system ANS with inertial coupling 5 Impacting pendulums ANS 6 Subharmonic Resonance c.NS 7 Simulation of Friction Behavior EAA 8 Mass with non-linear spring - jump AAA phenomena 9 Mass with piecewise linear spring - ANS limit cycles 10 Steady State response of boxes in water EXP 11 2 DOF - Test Problem to Verify Data SELF input formulation to change input data 12 1 DOF - Test Problem to Match Fluid EAA, EXP Structure Interaction Theoretical and Experimental Results (by Scazozzo, et.al)

EAA = exact analytical solution AAA = approximate analytical solution ANS = alternate numerical solution EXP = experiments SELF = self comparisons using alternate input Table 3.3 presents a validation matrix which sets forth the focus of the particular problem. Only the key items in Table 3.1 are checked in Table 3.3 for a specific problem.

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j Comparison of New and Existing Racks at Byron and Braidwood l D.isting Racks New Racks l

Submittal Date November 1987 March 1999 Number of Racks in Pool 23 24 Number of Storage Cells 2,870 2,984 Poison Material Boraflex Boral Rack Height, in 176 178.5 CellInside Dimension,in 8.85 (Reg. I & II Racks) 8.82 (Region I Racks) 8.75 (Region II Racks)

Cell Length,in 168.875 167 Pedestal Height,in 7.5 10.75 Baseplate Thickness,in 0.625 0.75 Weight Per Cell,Ibf 200 (Region I Racks) 261 (Region I Racks) 160 (Region II Racks) 155 (Region II Racks) l t

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Results Summary for the Byron /Braidwood Seismic Rack Analysis Item Value Maximum Horizontal Rack Displacement, 0.865 t in Maximum Vertical Rack Displacement, in 0.133" l

Maximum Vertical Force in Pedutal, Ibf 238,000 Maximum Friction Force at Pedestal 101,000 Interface, Ibf Maximum Fuel-to-Cell Wall Impact Force, 1,148 lbf Maximum Stress Factor 0.494 Maximum Shear Stress in Pedestal 10,102 Threads, psi

' The maximum rack horizontal displacement under isolated conditions is 1.50 in.

" The maximum vertical rack displacement under isolated conditions is 0.320 in.

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Differences Between the Watts Bar Project and the Byron /Braidwood Project Watts Bar Byron /Braidwooti

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