ML20127M738
| ML20127M738 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 01/25/1993 |
| From: | Edison G Office of Nuclear Reactor Regulation |
| To: | Sieber J DUQUESNE LIGHT CO. |
| References | |
| TAC-M84673, NUDOCS 9301280290 | |
| Download: ML20127M738 (4) | |
Text
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January 25, 1993 Docket No. 50-334 Mr. J. D. Sieber, Senior Vice President and Chief Nuclear Officer lluclear Power Division Duquesne Light Company Post Office Box 4 Shippingport, Pennsylvania 15077-0004
Dear Mr. Sieber:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION RELATED TO CHANGE REQUEST 202 (TAC NO. MS4673)
On November 2, 1992 Duquesne Light Company (DLC) submitted an application to amend the Appendix A Technical Specifications for Beaver Valley Power Station, Unit 1 (BVPS-1).
The proposed application would revise the TS to allow the spent fuel pool capacity to be increased to 1627 storage locations. Our review of this application is underway, but for us to complete our review we require additional information related to the criticality analyses.
l The required additional information is described in the Enclosure.
DLC is requested to provide a response within 30 days of receipt of this letter so that the staff can continue its review on the schedule you have requested.
The requirements of this letter affect fewer than 10 respondents, and, therefore, are not subject to the Office of Management and Budget revi w under t
PL 96-511.
Sincerely, Original signed b Gordon E. Edison, y: Senior Project Manager Project Directorate 1-3 Division of Reactor Projects - 1/11 Offita of Nuclear. Reactor Regulation
Enclosure:
Request for Additional Information cc w/ enclosure:
't' See next page 7
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January 25, 1993 Docket No. 50-334 Mr. J. D. Sieber, Senior Vice President and Chief Nuclear Officer Nuclear Power Division Duquesne Light Company Post Office Box 4 Shippingport, Pennsylvania 15077-0004
Dear Mr. Sieber:
SUBJEr.T :
REQUEST FOR ADDITIONAL INFORMATION RELATED TO CHANGE REQUEST 202 (TAC NO. M84673)
On November 2, 1992, Duquesne Light Company (DLC) submitted an application to amend the Appendix A Technical Specifications for Beaver Valley Power Station, Unit 1 (BVr3-1).
The proposed application would revise the TS to allow the.
spent fuel pool capacity to be increased to 1627 storage locations. Our review of this application is underway, but for us to complete our review we require additional information related to the cr',ticality analyses.
The required additional information is described in the Enclosure.
DLC is requested to provide a response within 30 days of receipt of this letter so that the staff can continue its review on the schedule you have requested.
The requirements of this letter affect fewer than 10 respondents, and, therefore, are not subject to the Office of Management and Budget review under PL 96-511.
Sincerely, Gordon E. Edison, Senior Project Manager Project Directorate 1-3 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation
Enclosure:
Request for Additional Information cc w/encloe me:
See next page
~
Mr. J. D. Sieber Beaver Valley Power Station Duquesne Light Company Unit I cc:
Jay E. Silberg, Esquire Bureau of Radiation Protection Shaw, Pittman, Potts & Trowbridge Pennsylvania Department of 2300 N Street, NW.
Environmental Resources Washington, DC 20037 ATIN:
R. Janati Post Office Box 2063 Nelson Tonet, Manager Harrisburg, Pennsylvania 17120 Nuclear Safety Duquesne Light Company Mayor of the Borrough of Post Office Box 4 Shippingport Shippingport, Pennsylvania 15077 Post Office Box 3 Shippingport, Pennsylvania 15077 Commissioner Roy M. Smith West Virginia Department of Labor Regional Administrator, Region 1 Building 3, Room 319 U.S. Nuclear Regulatory Commission Capitol Complex 475 Allendale Road Charleston, West Virginia 25305 King of Prussia, Pennsylvania 19406 John D. Borrows Resident inspector Director, Utilities Department U.S. Nuclear Regulatory Commission Public Utilities Commission Post Office Box 181 180 East Broad Street Shippingport, Pennsylvania 15077 Columbus, Ohio 43266-0573 Director, Pennsylvania Emergency Management Agency Post Office Box 3321 Harrisburg, Pennsylvania 17105-3321 Ohio EPA-DERR ATTH:
Zack A. Clayton Post Office Box 1049 Columbus, Ohio 43266-0149
a Enclo wre s
REQUEST FOR ADDITIONAL INFORMATION BEAVER VALLEY RERACK CRITICALITY ANALYSES 1.
The proposed revision to TS Bases 3/4.9.14, " Fuel Storage -
Spent FuoA Storage Pool," states a 650 ppm uncertainty in the boron concentration in the spent fuel pool.
Since this revision i
was probably meant to show that 400 ppa (1050-650) is sufficient to assure a k-eff no greater than 0.95 for the worst accident, we recommend that it be reworded so as not to imply that there is a 650 ppm uncertainty in the measurement or prediction of boron i
concentration in the pool.
This uncertainty presumably remains at 50 ppm.
i 2.
We do not concur with the proposal to allow a separate calculation to establish the admissibility of storing low burnup fuel in a Region 2 peripheral cell on a case-by-case basis.
These calculations should be done now to determine the minimum burnup requirements for fuel that can be stored in peripheral cells based on the remaining interior cells containing fuel with the minimum allowed burnup for Region 2.
A separate initial enrichment versus burnup table should be included in the TS for these peripheral cells.
3.
Some sections of the criticality analysis description refer to a conservative reference calculational temperature of 4 deg C whereas others refer to a reference temperature of 20 deg C.
Please clarify this discrepancy.
If 4 deg C is the reference temperature used in the calculations, justify its acceptability based on NRC Information Notice 91-66, which describes the limitations in using the SCALE 27-group ENDF/B-IV hydrogen cross sections ett other than 20 deg C _ or 277 deg C.
If 20 deg C is used, how is the increase in reactivity at temperatures lower than 20 deg C (which have occurred at several pools) accounted for?
4.
Should the addition of the phrase "of 5.0 w 3/4.9.14 be placed after " nominal region average /o" in TS Bases enrichment" rather than after the tolerance limits?
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