ML20204H242
| ML20204H242 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 07/31/1986 |
| From: | Sells D Office of Nuclear Reactor Regulation |
| To: | Andrews R OMAHA PUBLIC POWER DISTRICT |
| References | |
| TAC-60896, NUDOCS 8608080059 | |
| Download: ML20204H242 (3) | |
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July 31,1986 Distributica Docket No. 50-285 g; Docket File DSells NRC PDR PKreutzer Local PDR CThomas PD#8 Reading DFieno Mr. R. L. Andrews FMiraglia ACRS (10)
Division Manager - Nuclear Production OGC-Beth Omaha Public Power District EJordan 1623 Harney Street BGrimes-Omaha, Nebraska 68102 JPartlow NThompson
Dear Mr. Andrews:
Gray File 3.3a
SUBJECT:
CEA INSPECTION RESULTS The staff has completed its initial review of your submittal of February. 28,
~
1986 dealing with the end of Cycle 9 CEA Inspection Results.
As.a result of this review by the staff's consultants at Battelle Pacific Northwest Laboratories, it has been determined that additional information is required to complete the review.
The specific information required is described in the Enclosure.
You are requested to provide this additional information within 60_ days of receipt of this letter or inform us of a date that you can meet within 15 days.
If you have any questions concerning this request, please contact me at (301) 492-8144.
This request for information affects fewer than 10 respondents; therefore, OMB clearance is not required under P.L.96-511.
Sincerely,
/S/
Donald E. Sells, Project Manager PWR Project Directorate #8 Division of PWR Licensing-B
Enclosure:
As stated cc:
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I Mr. R. L. Andrews Fort Calhoun Station Omaha Public Power District Unit No. 1 cc:
Harry H. Voigt, Esq.
LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, NW Washington, D.C.
20036 Mr. Jack Jensen, Chairman Washington County Board of Supervisors Blair, Nebraska 68008 Metropolitan Planning Agency ATTN:
Dagnia Prieditis 7000 West Center Road Omaha, Nebraska 68107 Mr. Phillip Harrell, Resident Inspector U.S. Nuclear Regulatory Commission P. O. Box 309 Fort Calhoun, Nebraska 68023 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations C-E Power Systems 7910 Woodmont Avenue Bethesda,' Maryland 20810 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Office of Executive Director for Operations 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Harold Borchert, Director Division of Radiological Health Department of Health 301 Centennial Mall, South P.O. Box 95007 Lincoln, Nebraska 68509
Enclosure Questions Related to the Fort Calhoun Station, Unit No. 1 CEA Inspection Results 1.
Section 2.2 of the subject report has calculated an incremental strain for Cycle 10 that appears to be an estimated average incremental strain.
If so, what is the 95/95 upper confidence bound strain expected for the CEAs at the end of Cycle 10?
2.
Section 3.4 of the subject report has estimated the effects of reduced scram worth on Hot Zero Power and Hot Full Power Main Steam Line Break accidents.
Are these the bounding accident scenarios for evaluating control rod worth? Also, why is Cycle 10 considered to have a less severe cooldown curve than some previous cycles for this plant?
3.
Do the Combustion Engineering (C-E) evaluation models for B C swelling 4
and CEA cladding strain underpredict the strain data from Cycle 9 of Fort Calhoun Station Unit I? If so, what plans are to be implemented to eliminate further underpredictions of cladding strains for CEAs?
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