ML21105A370

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Handout for Pre-Application Meeting with Holtec on HI-STORM FW Amendment No. 7 (April 20, 2021)
ML21105A370
Person / Time
Site: 07201032
Issue date: 04/20/2021
From:
Holtec
To:
Office of Nuclear Material Safety and Safeguards
YJChen NMSS/DFM/STL 301.415.1018
References
Download: ML21105A370 (10)


Text

www.holtecinternational.com HI-STORM FW Amendment 7 Pre-Application Meeting April 20, 2021

Agenda Amendment 7 Proposed Changes Reorganization of the CoC with the Graded Approach Design Overview HI-STORM FW Version UVH Design Overview Optional Vent/Drain Port Cover Summary and Schedule Holtec Internationall Page 2

HI-STORM FW Amendment 7 Proposed Changes Reorganization of CoC with the graded approach HI-STORM FW Version UVH Version UVH is a HI-STORM FW overpack with the removal of ventilation ducts.

Optional vent/drain port cover plate design.

Remove PT examination on the post hydrostatic pressure test.

PT not required as part of ASME hydrostatic pressure testing requirements Supports ALARA operations Allow site-specific analysis of fire and burial under debris scenarios.

Use of water without glycol in the HI-TRAC water jacket during operations below 32°F.

A minimum MPC heat load is demonstrated to prevent the water within the HI-TRAC water jacket from freezing.

Holtec Internationall Page 3

HI-STORM FW Amendment 7 Proposed Changes HI-DRIP ancillary system.

An optional ancillary system designed to prevent water within the MPC during short term operations within the HI-TRAC.

Incorporation of design submitted with HI-STORM 100 Amendment 15 submittal.

Addition of BWR fuel assembly class 10x10J Fuel assembly class 10x10J is added to allowable content for storage in the MPC-89 canister.

Fuel type is currently in use by operating reactors and has been previously submitted for approval with the HI-STORM 100 LAR-15.

New fuel type was determined to be bounded by design basis fuel already analyzed in the HI-STORM FW FSAR.

Holtec Internationall Page 4

CoC Reorganization Following the Graded Approach

Background

RIRP-I-16-01 (2017): NEI proposed an outline for improving the storage CoC format and contents on behalf of the industry TN Pilot (submitted 2017 - approved 2020): TN submitted a non-technical amendment to a CoC following the guidance in RIRP NEI Margin White Paper: Recommendation VI-1: CoC holders should amend their CoCs to follow the precedent Holtec CoC 1014 - Amendment 16 and planned CoC 1032

- Amendment 7 Requests include technical changes and a proposed reorganization of the CoC and its appendices Holtec Internationall Page 5

CoC Reorganization Following the Graded Approach NEI Reorganized Outline:

CoC I. Technology II.Design Features Appendix A - Inspections, Tests, and Evaluations Appendix B - Technical Specifications 1.Definitions, Use, and Application 2.Approved Contents 3.LCOs and SRs 4.Administrative Controls Holtec Internationall Page 6

CoC Reorganization Following the Graded Approach This LAR contains proposed technical changes to the existing CoC and its Appendices It also contains the following documents to support the reorganization:

Reorganized CoC and Appendices Reorganization Tables Reorganization Matrix The only items that do not fit into the proposed outline Code alternative tables retained Expanded information included in Appendix A Holtec Internationall Page 7

HI-STORM FW Version UVH Unventilated overpack with high density concrete. This overpack is analyzed and supports loading of MPC-37, MPC-89, and MPC-44.

Removes periodic inspection of vent openings and associated LCOs.

Similar to the approved HI-STORM FW overpack, the Version UVH is of the variable height design.

Evaluation model methodologies are consistent with current HI-STORM FW analyses.

Holtec Internationall Page 8

MPC Vent/Drain Port Cover Plates Optional vent and drain penetrations design to include second port cover plate.

Design meets requirements of ISG-18 Rev. 1.

Field helium leak test not required on optional design.

Justification:

  • Confinement Integrity Holtec Internationall Page 9

HI-STORM Amendment 7 Summary CoC Reorganized following the graded approach.

HI-STORM FW Version UVH is an unventilated version of the HI-STORM FW overpack with high density concrete.

Evaluation methodologies follow those currently prior NRC approved models.

Planned Submittal end of April 2021.

Questions and Discussion Holtec Internationall Page 10