ML110630203

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

ML110630203
Person / Time
Site:	Calvert Cliffs
Issue date:	03/02/2011
From:	John Stanley Calvert Cliffs, Constellation Energy Nuclear Group, EDF Group
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation
References
Download: ML110630203 (6)

Text

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4 Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 CENG a joint venture of ConstellaUon

'eDF Energy'D CALVERT CLIFFS NUCLEAR POWER PLANT March 2, 2011 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:

REFERENCES:

Document Control Desk Calvert Cliffs Nuclear Power Plant Unit Nos. I & 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 (a) 10 CFR 50.59, Changes, tests, and experiments [Part (d)(2)]

(b) 10 CFR 72.48, Changes, tests, and experiments [Part (d)(2)]

In accordance with References (a) and (b), Calvert Cliffs Nuclear Power Plant provides Attachment (1).

This 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, 2010 and December 31, 2010.

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

ery Je

yours, 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:

D. V. Pickett, NRC W. M. Dean, NRC Resident Inspector, NRC S. Gray, DNR C. Haney, NMSS iZL 47

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 2, 2011

ATTACHMENT (1)

CALVERT CLIFFS NUCLEAR POWER PLANT REPORT OF CHANGES, TESTS, AND EXPERIMENTS 110 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 9/24/2010 Subject IMPLEMENTATION OF ISFSI LICENSE AMENDMENT 9 TO EXTEND NUHOMS-32P DSC BURNUP LIMIT Summary To enable CCNPP to continue with loading operations after 2009, changes to ISFSI Technical Specification sections 1.0, 2.1, LCO 3.1.1.1, 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 60'F 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 mention License Amendment Request.

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 bumup 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 bumup 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 burnup 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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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 SE00502 50.59 62 0002 4/14/2010 Subject Unit 2 Cycle 18 Core Reload (2009 RFO)

Summary The proposed activity is the loading and subsequent operation of Calvert Cliffs Unit 2 Cycle 18 (2009 RFO).

Revision 0000: Authorized Unit 2 Cycle 18 to operate in plant modes 5, 6, and defueled.

Revision 0001: Revision 0001 to SE00502 and the corresponding parent ECP, authorized operation of the redesigned U2C 18 core for plant modes 4, 5, and 6. As part of this core redesign, fuel assembly 2W508 was replaced with 1X41 1, assembly 2V01 1 was replaced with 2V101, and assembly 2V109 was replaced with 2V103. Multiple CEA's were also substituted in the redesign.

Revision 0002: This revision to SE00502 and the corresponding parent ECP, authorizes operation of the redesigned U2C18 core in all plant modes.

Scope of U2C18 Core Reload (Not Including Redesign):

" Implementation of Westinghouse Standard Fuel Pellet Specification & miscellaneous process improvements

" Zinc Injection

" CECOR Library Mid-Cycle Replacements

" Contingency Core Loading Patterns

• Contingency CEA Replacements

" Contingency for Stainless Steel Pins

" Contingency for Thermally Relaxed Turbo Grid Cage Scope of U2C18 Core Redesign Efforts:

" Replacement of assembly 2W508 with 1X411

" Replacement of assembly 2V01 1 with 2V101

" Replacement of assembly 2V109 with 2V103

" Replacement of CEA-ZC with CEA-ZA (CA06900)

" Replacement of CEA-TI with CEA-NH (CA0690 1)

" Replacement of CEA-5T with CEA-NW (CA0690 1)

Reason for Activity:

The proposed activity is required to support the biennial refueling of Unit 2 at Calvert Cliffs.

Activity Evaluation:

" The Refueling Boron Concentration will maintain Kf _< 0.95 Ak/k (including a 1% Ak/k conservative allowance for uncertainties).

" The UFSAR Chapter 14.3 boron dilution event remains bounding for U2C18.

" The Mode 5 Shutdown Boron Concentration will provide > 3.0 % Ap shutdown margin.

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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 SE00502 50.59 62 0002 4/14/2010

" The fuel handling event remains unchanged.

" Stainless steel pins are used only in approved locations (as necessary) per CENPD-289-P-A.

==

Conclusions:==

1. Unit 2 Cycle 18 is authorized for operation in plant modes.

2. The currently reported UFSAR accident doses remain bounding for operation of Unit 2 Cycle 18.

3. The proposed activity has been evaluated against the eight criteria of 10 CFR 50.59. It is concluded that no License Amendment is required prior for CCNPP Unit 2 Cycle 18.

Document Id Doc Type Rev Status Revision Date Issued SE00506 50.59 62 0000 3/5/2010 Subject Unit 1 Cycle 20 Core Reload (2010 RFO)

Summary The proposed activity is the loading and subsequent operation of Calvert Cliffs Unit 1 Cycle 20 (2010 RFO).

Unit 1 Cycle 20 may operate in all plant modes.

Scope of U1C20 Core Reload:

" Zinc Injection

" CECOR Library Mid-Cycle Replacements

" Contingency Core Loading Patterns

• Contingency CEA Replacements

" Contingency for Stainless Steel Pins

" Contingency for Thermally Relaxed Turbo Grid Cage Reason for Activity:

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

Activity Evaluation:

" The Refueling Boron Concentration will maintain Kff _< 0.95 Ak/k (including a 1% Ak/k conservative allowance for uncertainties).

" The UFSAR Chapter 14 events were evaluated and remain bounding for UlC20. The currently reported UFSAR accident doses remain bounding for U 1 C20 operation.

" The Mode 5 Shutdown Boron Concentration will provide > 3.0 % Ap shutdown margin.

" The fuel handling event remains unchanged.

3

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 SE00506 50.59 62 0000 3/5/2010

• Stainless steel pins are used only in approved locations (as necessary) per CENPD-289-P-A.

==

Conclusions:==

1. Unit 1 Cycle 20 is authorized for operation in all plant modes.

2. The currently reported UFSAR accident doses remain bounding for operation of Unit 1 Cycle 20.

3. The proposed activity has been evaluated against the eight criteria of 10 CFR 50.59. It is concluded that no License Amendment is required prior for CCNPP Unit 1 Cycle 20.

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