ML23069A234

Attachment 5: HI-STORM 100 Amendment 19 CoC, Appendix D Reorganization

ML23069A234
Person / Time
Site:	Holtec
Issue date:	03/10/2023
From:	Holtec
To:	Office of Nuclear Material Safety and Safeguards
Shared Package
ML23069A227	List: ML23069A229 ML23069A230 ML23069A231 ML23069A232 ML23069A233 ML23069A234 ML23069A235 ML23069A236 ML23069A237 ML23069A238 ML23069A239 ML23069A240 ML23069A241
References
CoC No. 1014, EPID L-2022-LLA-0028, CAC 001028, 5014959
Download: ML23069A234 (1)

Text

Holtec Letter 5014959 Attachment 5 4.4.1 Actions ............................................................................................................... 4-5 4.5 Aging Management Program ..................................................................................... 4-6 4.6 Combustible Gas Monitoring During MPC Lid Welding and Cutting .......................... 4-7 4.7 Heavy Loads Requirement .4-10 4.8 Pre-Operational Testing and Training .......4-11 4.8.1 Dry Run Training Exercise .4-11 FIGURES Figure 2.1-1: Cell Identification for MPC-32M ...........................................................................2-9 Figure 2.2-1: Discrete Pattern A Per Cell Allowable Heat Loads (kW) - MPC-32M ................2-18 Figure 2.2-2: Discrete Pattern B Per Cell Allowable Heat Loads (kW) - MPC-32M ................2-19 TABLES Table 2.1-1: Fuel Assembly Limits ...........................................................................................2-2 Table 2.1-2: PWR Fuel Assembly Characteristics for MPC-32M ..............................................2-6 Table 2.1-3: MPC-32M Non-Fuel Hardware Cooling and Average Burnup ...............................2-7 Table 2.1-4: Burnup and Cooling Time Fuel Qualification for MPC-32M...................................2-8 Table 2.2-1: Allowable Heat Loads and Soluble Boron Requirements for MPC-32M ..............2-12 Table 2.2-2: Maximum Allowable Decay Heat Loads for MPC-32M .......................................2-13 Table 2.2-3: MPC-32M Fuel Storage Regions ........................................................................2-13 Table 2.2-4: MPC-32M Fuel Storage Quadrants ....................................................................2-14 Table 2.2-5: MPC-32 Heat Load Data for UNVENTILATED OVERPACK...............................2-15 Table 2.2-6: MPC-32M Requirements on Developing Regionalized Heat Load Patterns for UNVENTILATED OVERPACK ........................................................................2-16 Table 2.2-7: Section Heat Load Calculations for MPC-32M for UNVENTILATED OVERPACK .....

............................................................................................................2-17 Table 2.2-8: DFC and DFI Storage Locations with Heat Load Penalties for MPC-32M for UNVENTILATED OVERPACK ........................................................................2-17 Table 3.3-1: MPC Cavity Drying Limits for VENTILATED OVERPACK ..................................3-15 Table 3.3-2: MPC-32M Cavity Drying Limits for UNVENTILATED OVERPACK .....................3-16 Table 3.3-3: MPC Helium Backfill Limits for VENTILATED OVERPACK ................................3-17 Table 3.3-4: MPC Helium Backfill Limits for UNVENTILATED OVERPACK ...........................3-18 Table 3.3-5: Completion Time for Actions to Restore SFSC Heat Removal System Operable ......

Certificate of Compliance No. 1014 Amendment No. 196 Appendix D ii 1 of 3

Holtec Letter 5014959 Attachment 5 4.7 Heavy Load Requirements Each lift of an MPC, a HI-TRAC transfer cask, or any HI-STORM overpack must be made in accordance to the existing heavy loads requirements and procedures of the licensed facility at which the lift is made. A plant specific review (under 10 CFR 50.59 or 10 CFR 72.48, if applicable) is required to show operational compliance with existing plant specific heavy loads requirements.

Lifting operations outside of structures governed by 10 CFR Part 50 must be in accordance with Section 4.2 and Sections 2.1.6 and 2.3 (if applicable) of Appendix A.

Certificate of Compliance No. 1014 Amendment No. 196 Appendix D 4-8 2 of 3

Holtec Letter 5014959 Attachment 5 4.8 Pre-Operational Testing and Training 4.8.1 Dry Run Training Exercise 4.8.1.1 A dry run training exercise of the loading, closure, handling, unloading, and transfer of the HI-STORM 100 Cask System shall be conducted by the licensee prior to the first use of the system to load spent fuel assemblies. The training exercise shall not be conducted with spent fuel in the MPC. The dry run may be performed in an alternate step sequence from the actual procedures, but all steps must be performed. The dry run shall include, but is not limited to the following:

4.8.1.2 Moving the MPC and the transfer cask into the spent fuel pool or cask loading pool.

4.8.1.3 Preparation of the HI-STORM 100 Cask System for fuel loading.

4.8.1.4 Selection and verification of specific fuel assemblies to ensure type conformance.

4.8.1.5 Loading specific assemblies and placing assemblies into the MPC (using a dummy fuel assembly), including appropriate independent verification.

4.8.1.6 Remote installation of the MPC lid and removal of the MPC and transfer cask from the spent fuel pool or cask loading pool.

4.8.1.7 MPC welding, NDE inspections, pressure testing, draining, moisture removal (by vacuum drying or forced helium dehydration, as applicable), and helium backfilling. (A mockup may be used for this dry-run exercise.)

4.8.1.8 Operation of the HI-STORM 100 SCS or equivalent system, if applicable.

4.8.1.9 Transfer cask upending/downending on the horizontal transfer trailer or other transfer device, as applicable to the sites cask handling arrangement.

4.8.1.10 Transfer of the MPC from the transfer cask to the overpack/VVM.

4.8.1.11 Placement of the HI-STORM 100 Cask System at the ISFSI, for aboveground systems only.

4.8.1.12 HI-STORM 100 Cask System unloading, including flooding MPC cavity, removing MPC lid welds. (A mockup may be used for this dry-run exercise.)

Certificate of Compliance No. 1014 Amendment No. 196 Appendix D 4-9 3 of 3