ML102070551
| ML102070551 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 07/23/2010 |
| From: | George Gellrich Calvert Cliffs 3 Nuclear Project, Constellation Energy Nuclear Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML102070551 (4) | |
Text
George H. Gellrich Vice President Calvert Cliffs Nuclear Power Plant, LLC 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 410.495.5200 410.495.3500 Fax CENG a joint venture of Consteflation
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.,eD CALVERT CLIFFS NUCLEAR POWER PLANT July 23, 2010 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
SUBJECT:
Document Control Desk Calvert Cliffs Nuclear Power Plant Unit Nos. 1 & 2; Docket Nos. 50-317 & 50-318 Response to Request for Additional Information Re: Proposed Transition from Westinghouse to AREVA Fuel (a)
Letter from Mr. D. V. Pickett (NRC) to Mr. G. H. Gellrich (CCNPP),
dated June 23, 2010, Request for Additional Information Re: Proposed Transition from Westinghouse to AREVA Fuel
REFERENCES:
(b)
Letter from Mr. T. E. Trepanier (CCNPP) to Document Control Desk (NRC), dated November 23, 2009, License Amendment Request:
Transition from Westinghouse Nuclear Fuel to AREVA Nuclear Fuel Reference (a) requested additional information related to the proposed license amendment to support the transition from Westinghouse fuel to AREVA Advanced CE-14 High Thermal Performance fuel.
Attachment (1) contains the response to that request. This response does not change the No Significant Hazards determination previously provided in Reference (b).
,I.
Document Control Desk July 23, 2010 Page 2 Should you have questions regarding this matter, please contact Mr. Douglas E. Lauver at (410) 495-5219.
Very truly yours, STATE OF MARYLAND COUNTY OF CALVERT TO WIT:
I, George H. Gellrich, being duly sworn, state that I am Vice President - Calvert Cliffs Nuclear Power Plant, LLC (CCNPP), and that I am duly authorized to execute and file this License Amendment Request on behalf of CCNPP. To the best of my knowledge and belief, the statements contained in this document are true and correct. To the extent that these statements are not based on my personal knowledge, they are based upon information provided by other CCNPP employees and/or consultants. Such information has been reviewed in accordance with company practice and I believe it to be reliable.
Subscribed andsworn before me, a Notary Public in and for the State of Maryland and County of I-,V/ /9 this 2.
day of CI-L/t,
,2010.
WfTNESS" -my Hand and Notarial Seal:
My Commission Expires:
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LU Notary Public I
Date GHG/PSF/bjd
Attachment:
(1)
Response to Request for Additional - Transition to Areva Nuclear Fuel cc:
D. V. Pickett, NRC M. L. Dapas, NRC Resident Inspector, NRC S. Gray, DNR
ATTACHMENT (1)
RESPONSE TO REQUEST FOR ADDITIONAL - TRANSITION TO AREVA NUCLEAR FUEL Calvert Cliffs Nuclear Power Plant, LLC July 23, 2010
ATTACHMENT (1)
RESPONSE TO REQUEST FOR ADDITIONAL - TRANSITION TO AREVA NUCLEAR FUEL NRC RAI 1:
A modification to the licensing basis fuel type can have the potential to change the core isotopic distribution assumed in post accident conditions. Based upon this, please provide additional information regarding the effect the proposed fuel type change has on the current radiological consequence design basis analyses. Please provide any changes to the parameters, assumptions, or methodologies in the radiological design-basis accident (DBA) analyses as a result of the proposed fuel type change and justification for those changes. If there are changes to the radiological DBA analyses, please provide the resulting change to the calculated radiological consequence of the DBAs.
CCNPP Response:
Previously, an analysis was done to develop a bounding source-term that is used for the radiological DBAs with failed fuel.
This analysis was performed based on Westinghouse fuel and Regulatory Guide 1.183 release fractions. An additional analysis was performed to demonstrate that the core source-term previously developed remained bounding for AREVA Advanced CE-14 High Thermal Performance fuel using Gd 20 3 burnable poison irradiated to a maximum burnup to 62 GWd/MTU. Both analyses calculated the core isotope activity with SAS2HIORIGEN-S.
Each analysis examined 11 core power distribution scenarios to determine the most limiting case. The AREVA fuel source-term was compared to the Westinghouse fuel source-term assuming the most limiting case for each fuel type. The results for both dose rates and dose show that the Westinghouse fuel source-term is most limiting. Therefore, the source-term input for the radiological DBAs does not need to be updated based on the transition to AREVA fuel and the current accident.dose analysis results remain bounding.
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