ML24178A431

Issuance of Certificate of Compliance No. 1014, Amendment No. 16 for the HI-STORM 100 Cask System, Cover Letter

ML24178A431
Person / Time
Site:	Holtec
Issue date:	07/29/2024
From:	Yoira Diaz-Sanabria Storage and Transportation Licensing Branch
To:	Elisio D Holtec
Shared Package
ML24178A430	List: ML24178A431 ML24178A432 ML24178A433 ML24178A434 ML24178A435 ML24178A436 ML24178A437 ML24178A438 ML24178A439
References
EPID L-2021-LLA-0039, CAC 001028
Download: ML24178A431 (1)

Text

Denise Elisio, Licensing Engineer Holtec International Holtec Technology Campus One Holtec Boulevard Camden, NJ 08104

SUBJECT:

ISSUANCE OF CERTIFICATE OF COMPLIANCE NO. 1014, AMENDMENT NO.

16 FOR THE HI-STORM 100 CASK SYSTEM (CAC/EPID NOS. 001028/

L-2021-LLA-0039)

Dear Denise Elisio:

By a letter dated March 9, 2021 (Agencywide Documents Access and Management System (ADAMS) Accession Nos. ML21068A360), as supplemented on August 11, 2021 (ML21223A045), August 31, 2022 (ML22243A269), September 9, 2022 (ML22249A347),

October 3, 2022 (ML22276A286), January 4, 2023 (ML23005A000), January 5, 2023 (ML23005A273), January 13, 2023 (ML23013A337), March 17, 2023 (ML23076A271), and September 20, 2023 (ML23263B122), Holtec International submitted an amendment request to the HI-STORM 100 Cask System, Certificate of Compliance (CoC) No. 1014. On February 17, 2022 (ML22048C222), Holtec International requested to separate the CoC reorganization, also known as graded approach, from this amendment. Therefore, this certificate does not include any evaluation on the graded approach.

Amendment No. 16 to HI-STORM 100 Cask System includes the following changes:

Change 1 - Add a new unventilated high-density (UVH) overpack, HI-STORM 100 UVH, which includes high-density concrete for shielding. The UVH overpack is to be used with the multi-purpose canister (MPC)-32M and MPC-68M.

Change 2 - Include the ability to use the computational fluid dynamics analysis to evaluate site-specific fire accident scenario.

Change 3 - Modify the vent and drain penetrations to include the option of a second port cover plate.

Change 4 - Include the ability to use computational fluid dynamics analysis to evaluate site-specific burial under debris accident scenario.

Change 5 - Include the ability to use water without glycol in the transfer cask HI-TRAC water jacket during transfer operations below 32°F based on the site-specific MPC total heat loads.July 29, 2024 Change 6 - Change the hydrostatic pressure test of the MPC acceptance criteria to be examination for leakage only. Remove post hydrostatic test liquid penetrant and magnetic particle examination.

Change 7 - Replace the fuel qualification tables in the final safety analysis report (FSAR) chapter 2 and the CoC, including the equation for calculation of the maximum allowable burnup as a function of the cooling time and cooling time-dependent coefficients, with simpler sets of burnup and cooling time limits. Reduce the minimum cooling time for pressurized-water reactor fuel from 2 years to 1 year.

Change 8 - Revise FSAR appendix 1.D to enhance certain requirements, to add certain revised shielding assumptions following a significant thermal event, and to add critical characteristics for concrete employed in the HI-STORM 100 UVH system. Rename the title of Appendix 1.D to Specification for Plain Concrete in the HI-STORM Family of Overpacks.

As stated in the Federal Register (89 FR 52999, June 25, 2024), the effective date of this CoC amendment is September 9, 2024. The NRC safety evaluation report for this amended CoC (including the CoC and appendices) is enclosed. If you have any questions regarding this amended certificate, please contact Yen-Ju Chen at (301) 415-1018.

Sincerely, Yoira Diaz-Sanabria, Chief Storage and Transportation Licensing Branch Division of Fuel Management Office of Nuclear Material Safety and Safeguards Docket No.: 72-1014 CAC/EPID Nos. 001028/L-2021-LLA-0039

Enclosures:

1. CoC 1014, A16, CoC

2. CoC 1014, A16, Appendix A

3. CoC 1014, A16, Appendix B

4. CoC 1014, A16, Appendix A-100U

5. CoC 1014, A16, Appendix B-100U

6. CoC 1014, A16, Appendix C

7. CoC 1014, A16, Appendix D

8. CoC 1014, A16, Final SER Signed by Diaz-Sanabria, Yoira on 07/29/24

ML24178A430(pkg), ML24178A431 (ltr), ML24178A432 (CoC),

ML24178A433 (App A), ML24178A434 (App A), ML24178A435 (AppA-100U),

ML24178A436 (AppB-100U), ML24178A437 (App C), ML24178A438 (App D),

ML24178A439 (FSER)

OFFICE NMSS NMSS NMSS NAME YChen WWheatley YDiaz-Sanabria

DATE 7/17/2024 7/18/2024 7/29/2024