ML17194B446
| ML17194B446 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 01/31/1983 |
| From: | Gilbert R Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8302040188 | |
| Download: ML17194B446 (5) | |
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January 31, 1983 Docket No. 50-237 LICENSEE:
COMMONWEALTH EDISON COMPANY {CEcif) fACiLITV:
Drerscien Nuclear Power Station, Unit No. 2
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SUBJECTt
SUMMARY
OF MEETING HELO ON JANUARY 24 0 1983 A meeting was held in Bethesda, Maryland with representatives of CECo and Exxon.Nuclear Company (ENC) to discuss the local'_stability analysis and other issues connected with the proposed use of four 9X9 1 ea~J assemblies to be included in the Dresden 2 Cycle 9 Reload core.
A 11st
.of attendees is provided in Enclosure 1 and an agenda of the items discussed is sh'.9.wn in Enclosure~)**
During the presentations the staff made it clear that the'.~reload core must meet GOC-12 particularly relating to uncontrolled osdf~1 lat ions in the 9X9 bundles, The staff also emphasized that materhl concerning stability, expected to be furnished f<Q)lowing meetings held in September 1982, had not been~ received.
- The ENC r-ep.resentatives discussed in some detail the.ir stab.ility analysis including the conservatisms built into it. The staff ~essed concern that the analysis was n core average; treatment instead of a treatment of individual 9X9 assemblies.v I
The representati~es from CECo briefly di@cussed *the experiments to be done on the core if 9X9s are included ana itCwas emphasized that, if local instability pr<>blems arise, the 9X9 control rods would be inserted for the remainder of this cycle. They also d1scusse'L,fhe 5601 contingency situations required if the 9X9Qf,,are not approved and t>S~
requeste,4. a decision on the 9X9s be made qui~ly so that the reload not be d~~~ayed. The staff agreed to furnish an answer by Thursday, January 27; 1983 as to whether a 9X9 LA thermal hydraulic review can be done. This decision can be made only if the above information flows are expedited~
It was agreed that the staff would be fi.Jrnished the following information:
- 1. The ENC analysis of the parameters resulting when a(!ull 9X9 core is used~
- 2. Preliminary inf;fbnnation de.J,crib:ing the ENC stability analytical mo.de model along \\~ith a formal request for staff review of that model.
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NRCFOAM318(1;80)NRCM0240 OFFICIAL RECORD COPY USGP0:1981-335-960
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January 31, 1983
- 3. A description of the planned stability tests to be performed by CE Co at Ores den 2 with the four 9X9s c::>in the core and the c;>
criteria for surveillance and safe operation.with the four 9X9s.
In addition the staff consultant was to prepare and provide through the NRC to ENC, a table of input parameters for their code calcu9 lations.
ENC was then to quickly provide data corresponding to these
- p*aram~ers. This information will allow the staff to perform an aud1t of the full core ENC 9X9 data.*
During the ENC presentations, viewgraphs were used. Copies were furnished to the staff for their use and files but were declared proprietary information by ENC *.
Enclosures:
l~ List of Attendees
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Meeting Agenda cc w/enclosures:
See next page
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Original sign~d by R9bert A. Gilbert. Project Manager OjB;eratfog Reactors Branch #5 Division of Ltcensing OFFICE. ~*~*~*;*~~*~*~** *~~~
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NRCFORM318,{10-80)NRCM0240 OFFICIAL RECORD COPY
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USGPO: 1981-335-960
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Mr. L. OelGeorge cc Isham, Lincoln & Beale Cou~selors at Law One First National Plaza, 42nd Floor, Chicago, Illinois 60603 Mr. Doug Scott Plant Superintendent Ru ra 1 Route #1 Morris, I 11 i no_i s 604~0 U. S. Nuclear Regulatory Conmission Resident Inspectors Office Ores den Station
.RR ill Morris, Illinois 60450 Chairman Board.of Supervisors of Grundy County Grundy County* Courthouse Morris, Illinois 60450 Illinois Department of Nuclear Safety 1035 Outer Park Drive, 5th Floor Springfield, Illinois 62704 U. S. Environmental Protection Agency Federal Activities Branch Region V Office
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Regional Radiation Representative 230 South Dearborn Street Chicago, Illinois 60604 James G. Keppler, Regional Administrator Nuclear Regulatory Commission, Region III.
- 799 Roosevelt Road Glen Eilyn, Illinois 60137 January 31, 1983
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LIST OF ATTENDEES Dresden Unit No. 2 Me~ting of January 24, 1983 CYCLE 9 STABILITY ANALYSIS MEETING NAME R. Stout T. Krysinski J. C. Chandler L. Nielsen L Rausch J. Wojnarowski L. Phillips G. Schwenk L. Lois
- w. Brooks A. Gi 11 R. Gilbert P. Otaduy AFFILIATION Exxon Exxon Exxon Exxon CE Co CE Co NRC NRC NRC NRC NRC NRC ORNL (NRC consultant)
ENCLOSURE l
ENCLOSURE 2 DRESDEN 2 CYCLE 9 STABILITY ANALYSIS I
TECHNICAL REVIEW MEETING January 24, 1983 1:00 PM Bethesda, Maryland AGENDA INTRODUCTION ENC PERSPECTIVE
SUMMARY
OF APPROACH TO DRESDEN 2 CYCLE 9 STABILITY ISSUE DRESDEN 2 CYCLE 9 WHOLE CORE STABILITY ANALYSIS COMPARISON OF 8x8 AND 9x9 LOCAL STABILITY ANALYSES PLANS FOR RESOLUTION OF GENERIC STABILITY ISSUE
SUMMARY
AND SCHEDULES OPEN DISCUSSION T. J. Raus.ch Commonwealth Edison J. c. Chandler Exxon Nuclear T. L. Krysinski Exxon Nuclear L. A. Nielsen Exxon Nuclear L. A. Nielsen Exxon Nuclear T. L. Krysinski Exxon Nuclear J. c. Chandler Exxon Nuclear
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