ML18051A880
| ML18051A880 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 05/03/1984 |
| From: | Paulson W Office of Nuclear Reactor Regulation |
| To: | Vandewalle D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| SOL5-84-05-003, SOL5-84-5-3, NUDOCS 8405040336 | |
| Download: ML18051A880 (3) | |
Text
Docket No.
50~255 SL05-84-05-0&3 Mr. David J. VandeWalle Nuclear Licensing Administrator Consumers Power Company 1945 W. Parnall Road Jackson, Michigan 49201
Dear Mr. VandeWalle:
May 3, 1984
SUBJECT:
XNB CORRELATION FOR PALISADES APPLICATION We find that additional information is needed to continue our review of the XNB correlation for Palisades application (Exxon report XN-NF-709, Revision 0). Please provide your response to the enclosure by May 11, 1984.
The questions in the enclosure were telecopied to your staff on April 30, 1984.
The reporting and/or recordkeeping requirements contained in this letter affect* fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.
Enclosure:
As *stated above cc w/enclosure See next ~e
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~~~:jc Sincerely, Original signed by Walter A. Paulson, Project Manager Operating Reactors Branch #5 Division of Licensing
Mr. David J. VandeWalle cc M. I. Miller, Esquire Isham, Lincoln & Beale Suite 4200 One First National Plaza Chicago, 111.inois 60670 Mr. Paul A. Perry, Secretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Mithigan Avenue Jackson, Michigan 49201 James G. Keppler, Regional Administrator Nuclear Regulatory Commission, Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Township Supervisor Covert Township Route 1, Box 10 Van Buren.County, Michigan 49043 Office tif the Governor Room 1 - Capitol Building Lansing, Michigan 48913 Palisades Plant ATTN:
Mr. Robert Montross Plant Manager Covert, Michigan 49043 U.S. Environmental Protection Agency Federal Activities Branch Region V Office ATTN:
Regional Radiation Representative 230 South Dearborn Street Chicago, Illinois 60604 Resident Inspector c/o U.S. NRC Palisades Plant Route 2, P. 0. Box 155 Covert, Michigan 49043 May 3, 1984 Lee E. Jager, P.E., Chief Environmental and Occupational Health Services Administration Michigan Department of Public Health 3500 N. Logan Street Post Office Box 30035 Lansing, Michigan 48909
p REQUEST FOR ADDITIONAL INFORMATION PALISADES PLANT EXXON REPORT
- 1.
Section 20, "Analysis of Data", of the topical report states:
"The differences in fluid conditions for the 1 imiting subchannel between the rod indicating CHF and the XCOBRA prediction of the rod indicating CHF we re observed to be sma 11
- 11
- 2.
(a)
How are the fluid conditions for the limiting subchannel obtained other than the XCOBRA prediction?
(b)
Provide ccxnparisons of the 1 imiting subchannel fluid conditions between those of the rod indicating CHF and those predicted by XCOBRA.
The ENC-204 test data, which are used for justification of the application of the XNB correlation to Palisades, consist of --
unifonn axial power shape data only. It is the position of'tbe staff that all possible power distributions expected for power operation be used in the develoµnent of any CHF correlation.
Therefore, rather than using the ENC-204 data solely to derive the DNBR limit, it is necessary that the ENC-204 data belong to the same population as other data presented in XN-NF-621, Revision 1.
Provide your statistical analysis *ta show that the ENC-204 data is in the same population.
- 3.
In the 1 etter dated January.3, 1983 (from J. C. Chandler to L. E. Phillips, JCC-001:83), ENC requested that the ENC-1 and ENC-2 test sections be removed from the data base for the XNB correlation because these two test sections are either non-representa tive of any grid or atypical of the power distribution in the reactors.
As stated in XN-NF-709, Both ENC-1 and ENC-2 represent the rod size and pitch of Palisades.
What is the impact of removal of these data on the applicability of XNB for Palisades?