ML13070A092

Report of Changes, Tests, and Experiments - 10 CFR 50.59 and 10 CFR 72.48

ML13070A092
Person / Time
Site:	Calvert Cliffs
Issue date:	03/07/2013
From:	John Stanley Constellation Energy Nuclear Group, Calvert Cliffs, EDF Group
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
Download: ML13070A092 (4)

Text

Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 CENG a joint venture of constellation. 9J*eDF Ener"gMOy CALVERT CLIFFS NUCLEAR POWER PLANT March 7, 2013 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk

SUBJECT:

Calvert Cliffs Nuclear Power Plant Unit Nos. 1 & 2; Docket Nos. 50-317 & 50-318 Independent Spent Fuel Storage Installation; Docket No. 72-8 Report of Changes, Tests, and Experiments- 10 CFR 50.59 and 10 CFR 72.48 In accordance with 10 CFR 50.59(d)(2) and 10 CFR 72.48(d)(2), a report of changes, tests and experiments is provided as Attachment (1). The attachment contains brief descriptions of changes, tests, and experiments approved under the provisions of 10 CFR 50.59 and 10 CFR 72.48 between January 1, 2012 and December 31, 2012.

Should you have questions regarding this matter, please contact Mr. Douglas E. Lauver at (410) 495-5219.

Very truly yours, for James J. Stanley Manager - Engineering Services JJS/PSF/bjd

Attachment:

(1) Calvert Cliffs Nuclear Power Plant Report of Changes, Tests, and Experiments

[10 CFR 50.59(d)(2) and 10 CFR 72.48(d)(2)]

cc: B. Vaidya, NRC S. Gray, DNR W. M. Dean, NRC C. Haney, NMSS Resident Inspector, NRC 471

ATTACHMENT (1)

CALVERT CLIFFS NUCLEAR POWER PLANT REPORT OF CHANGES, TESTS, AND EXPERIMENTS

[10 CFR 50.59(d)(2) and 10 CFR 72.48(d)(2)]

Calvert Cliffs Nuclear Power Plant, LLC March 7,2013

ATTACHMENT (1)

CALVERT CLIFFS NUCLEAR POWER PLANT REPORT OF CHANGES, TESTS, AND EXPERIMENTS

[10 CFR 50.59(d)(2) and 10 CFR 72.48(d)(2)]

Document Id Doc Type Rev Status Revision Date Issued SE00512 50.59 62 0000 2/23/2012 Subject Implementation of ISFSI License Amendment 9 to extend NUHOMS-32P DSC Bumup Limit Summary Proposed Activity:

The proposed activity is the Unit 1 Cycle 21 (U1C21) core reload in all plant modes.

Reason for Activity:

The proposed activity is required to support the biennial refueling of Unit 1 at Calvert Cliffs.

Activity Evaluation:

All safety analyses required to justify Unit 1 Cycle 21 operation in all plant modes have been completed/evaluated and the currently reported UFSAR accident doses remain bounding for operation of Unit 1 Cycle 21.

Conclusions:

• Unit 1 Cycle 21 is authorized for operation in all plant modes.

• The proposed activity has been evaluated against the eight criteria of 10 CFR 50.59. It is concluded that no additional License Amendment is required prior to implementation since all items requiring prior NRC review and approval were included in the NRC Tech Spec changes and SER received on 2/18/11 Document Id Doc Type Rev Status Revision Date Issued SE00165 72.48 62 0000 11/15/2012 Subject Implementation of ISFSI License Amendment 9 to extend NUHOMS-32P DSC Burnup Limit Summary Proposed Activity:

To enable CCNPP to continue with loading operations after 2009, changes to ISFSI Technical Specification sections 1.0, 2.1, LCO 3.1.1, LCO 3.4.1.1 were submitted to the NRC on June 15, 2009, and approved on September 14, 2010 via Amendment No. 9 to SNM License-2505. Specifically these changes:

" Increase the neutron and gamma source for fuel assemblies stored in NUHOMS-32P DSCs,

" Increase the maximum fuel assembly burnup to 52,000 MWd/MTU for the NUHOMS-32P DSCs,

" Increase the maximum air temperature rise from the HSM inlet to the HSM outlet from 607F to 64°F.

" Change the definitions of intact and undamaged fuel.

In addition to the above Technical Specification changes, the NRC also required CCNPP to add a new Technical Specification requirement for hydrogen monitoring of the void space below the top shield plug during closure welding for consistency with other ISFSI Technical specification (this monitoring is already performed in ISFSI-03). No physical changes to the NUHOMS-32P DSC, the transfer cask, or the HSMs will occur as a result of this change, and the maximum heat load of the DSC will not increase. This package completes other document changes required to implement ISFSI License Amendment No. 9. This 72.48 is primarily focused on analyses associated with ES200600043-000 that were not submitted as part of the above mentioned License Amendment Request.

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ATTACHMENT (1)

CALVERT CLIFFS NUCLEAR POWER PLANT REPORT OF CHANGES, TESTS, AND EXPERIMENTS

[10 CFR 50.59(d)(2) and 10 CFR 72.48(d)(2)]

Document Id Doc Type Rev Status Revision Date Issued SE00165 72.48 62 0000 11/15/2012 Reason for Activity:

The supply of fuel assemblies meeting the fuel storage requirements in the Independent Spent Fuel Storage Installation (ISFSI) Technical Specifications was exhausted during the 2009 loadings. Specifically, the burnup limit of 47,000 megawatt-days per metric ton uranium (MWd/MTU) for the NUHOMS-32P Dry Shielded Canister (DSC) was insufficient to allow all the horizontal storage modules (HSMs) in Phase III to be filled. Increasing the burnup limit to 52,000 MWd/MTU would be sufficient to allow all of the HSMs to be utilized.

Activity Evaluation:

New analyses are performed to verify that confinement, shielding, DSC internal pressure, structural stresses, and cladding temperatures are acceptable with the use of the NUHOMS-32P DSC containing fuel with a maximum burnup of 52 GWD/MTU at the CCNPP ISFSI.

The results of the analyses demonstrate that the extended burmup 32P DSC and the existing TC and HSM with the use of the extended burnup 32P DSCs meet all of the design criteria, and will provide for a safe storage of the spent fuel assemblies under normal, off-normal and postulated accident conditions.

Conclusions:

The proposed activity has been evaluated against the eight criteria of 10 CFR 72.48(c)(2). Based on this evaluation, an additional amendment for portions of the package not already submitted for ISFSI License Amendment 9 is not required. In addition, no technical specification changes beyond those which were approved with ISFSI License Amendment 9 are required.

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