ML24199A081
| ML24199A081 | |
| Person / Time | |
|---|---|
| Site: | 07109397 |
| Issue date: | 06/30/2024 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML24199A065 | List: |
| References | |
| EPID L-2022-NEW-0002 | |
| Download: ML24199A081 (1) | |
Text
www.holtecinternational.com
HI-STAR 330 New Type B(U) Transportation Package
Pre-Application Presentation to NRC
June,2024 Presentation Agenda Introduction Cask Overview Summary and Proposed Licensing Schedule Questions
l Page 2Page 2-HoltecInformation Introduction
Holtec is preparing to submit a license application for the new HI-STAR 330 Transportation Package.
The HI-STAR 330 package design incorporates containment boundary and shielding design elements and concepts derived from the HI-STAR ATB1T but with key enhancements.
HI-STAR 330 Package impact limiting component design concept uses crushable aluminum material, similar tothe HI-STAR ATB1T's.
Lessons Learned from HI-STAR ATB1T have been incorporated asappropriate.
HI-STAR 330 is not a pressure vessel. HI-STAR 330 design pressure is less than the pressure specified by ASME Code for classification as a pressure vessel.
The Safety Analysis Report (SAR) on the HI-STAR 330 follows essentially the same basic format as HoltecsHI-STAR ATB1T SAR.
l Page 3Page 3-HoltecInformation Cask Overview General Content Non-Fuel Waste (NFW) in the form of power reactor-related waste in a solid form (up to 110,000 lbs, includes liner tanks and dunnage).
Secondary packaging (liner tanks) are used for operational convenience and to meet required safety functions.
Dunnage is allowed (secondary packaging may serve as dunnage).
Principal Package Performance Low design heat load, low pressures and temperatures.
Leakage Rate Acceptance Criteria based on Containment Analysis.
Wrench-tight containment bolt installation promotes ALARA.
Corrosion and Radiolysis Mitigation Cask is not submerged in pool for loading.
Secondary packaging, if submerged in pool, is procedurally controlled to limit moisture content.
l Page 4Page 4-HoltecInformation Design Overview-Cask and Lid
l Page 5Page 5-HoltecInformation Technical Overview Structural Safety Analysis Approach (further details in proprietary session)
LS-DYNA 10CFR71.71 and 10CFR71.73 Dynamic Analysis 0.3-meter drop (governing orientations based on 9-meter drop causing the most damage) 9-meter drop (bottom down, top down, side drop on small surface, CG over corner (CGOC) bottom down, CGOC top down, CG over short edge (CGOE) bottom down, CGOE top down) 1-meter puncture on most vulnerable locations and orientations (cask large surface wall, closure seals along cask edge, trunnion locations assuming missing trunnion, corner impact limiter deformed by CGOC drop)
Static Analysis Lifting, immersion, component stability, fire accident, fatigue, fracture etc.
addressed in SAR with separate supporting report.
l Page 6 Technical Overview Thermal Safety Analysis Approach (further details in proprietary session)
ANSYS-Fluent CFD Code Methodology consistent with that adopted in HI-STAR ATB-1T application Analyzed Conditions as per 10CFR71.71 and 10CFR71.73 NCT Cask in Horizontal Orientation with Solar Insolation applied NCT Cask in Shade Assessment of Grid Independence HAC Fire Condition evaluation after drop and puncture event sequence Containment Safety Analysis Approach 10CFR71.51(a)(1), 10CFR71.51(a)(2) -NCT and HAC Allowable Release Rates
l Page 7 Technical Overview
Shielding Safety Analysis Approach (further details in proprietary session)
NCT: 10 CFR 71.47 HAC: 10 CFR 71.51 MCNP shielding calculations (dose rates)
Shielding MCNP geometry of the HI-STAR 330 is very similar to HI-STAR ATB 1T with minor geometric changes.
l Page 8 Summary and Licensing Schedule
Design details, materials, and safety analyses approaches follow HI-STAR ATB 1T, except where this cask differs. Pre-identified approaches are reasonable based on the design changes for this cask.
Planned Submittal September 2024 Request Approval by February 2026
l Page 9Page 8-HoltecInformation Questions and Discussion
l Page 10Page 9-HoltecInformation