ML19340E863
| ML19340E863 | |
| Person / Time | |
|---|---|
| Site: | 07109294 |
| Issue date: | 12/06/2019 |
| From: | Global Nuclear Fuel |
| To: | Office of Nuclear Material Safety and Safeguards, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19340E852 | List: |
| References | |
| M190212 | |
| Download: ML19340E863 (18) | |
Text
ENCLOSURE 3 M190212 NPC CoC Amendment Meeting Presentation Non-Proprietary Information IMPORTANT NOTICE This is a non-proprietary version of Enclosure 2 to M190212, which has the proprietary information removed. Portions of the document that have been removed are indicated by an open and closed bracket as shown here (( )).
Pre-Submittal Meeting for the New Powder Container Certificate of Compliance Amendment and Renewal Non-Proprietary Information December 17, 2019
Non-Proprietary Information 2
Meeting Agenda Non-Proprietary Discussion
Introductions
Purpose of Meeting Summary of Previous NRC and GNF New Powder Container (NPC)
Discussions Proprietary Discussion Technical Safety Analysis Report (SAR) Modifications Submittal Strategy and Timing Proprietary Questions and Answers
Non-Proprietary Information 3
Purpose
- Review the technical approach for revising the NPC SAR NEDO-33881 Rev. 5 [ML15042A187 and ML15042A199] and package renewal.
Non-Proprietary Information 4
Summary of Previous NRC and GNF NPC Discussions
- Monday, June 19, 2017 [ML17170A025]
o GNF submits NEDO-33881 Rev. 6 [ML17186A290] to expand authorized NPC uranium content and re-instate the previously approved Boiling Water Reactor (BWR) and Pressurized Water Reactor (PWR) pellet payload.
- Tuesday, October 30, 2018 [ML18303A245]
o GNF withdraws NEDO-33881 Rev. 6 license application.
- Wednesday, June 5, 2019 [ML19165A048]
o Technical approach to address NRC Requests for Additional Information (RAIs) against NEDO-33881 Rev. 6 [ML18107A753].
GNF will not formally submit responses to NEDO-33881 Rev. 6 RAIs.
Amendment will be performed relative to NEDO-33881 Rev. 5.
o Chapter-by-chapter overview of proposed changes to be included in NEDO-33881 Rev. 7.
Non-Proprietary Information 5
Overview of Modifications to NPC NEDO-33881
- No package or hardware modifications.
- No drawing or package description changes.
- No technical changes to Chapter 2 (structural), Chapter 3 (thermal), Chapter 4 (containment), Chapter 5 (shielding), or Chapter 8 (acceptance testing and maintenance) analyses.
o Minor administrative changes to address formatting and typos.
- Modified to expand authorized NPC uranium content and re-instate the previously approved BWR and PWR pellet payloads.
- Included homogenous to heterogeneous transition particle size.
- Removed weight limit for polyethylene packaging materials for a hydrogen density less than water.
Non-Proprietary Information 6
Chapter 1 Added a detailed list of uranium compounds.
Specified that homogeneous/heterogeneous uranium materials are limited to solid form with a Uranium Weight Fraction (UFACT) less than or equal to UO2 (UFACT 0.88144) at theoretical density (10.96 g/cm3).
Specified that if a majority of the particles are 1730 m or smaller, then the material form can be considered homogenous.
Polyethylene packaging materials within the Inner Containment Canister Assemblies (ICCAs) is unrestricted provided the mean hydrogen atom density is not greater than water (6.6734*10-2 atoms/b-cm).
o This limit is applied as an average hydrogen density of the entire ICCA content mass.
Non-Proprietary Information 7
Chapters 2, 3, 4, 5, and 8
- No amendments to package gross weight limits or structural components.
- No amendments to structural evaluation.
- No amendment to thermal analyses or thermal testing.
- No changes to container confinement boundary.
- No changes to the Type-A uranium compound limits.
- Minor administrative changes to address formatting and word processing issues in Chapters 2, 3, 4, and 8.
- No amendments to Chapter 5.
Non-Proprietary Information 8
Chapter 6 - Overview
- Amended Section 6.1 for new uranium contents, payload, and polyethylene packaging material requirements.
- New description of GEMER convergence plots in Section 6.4.5.
- Added Section 6.11 for k-infinite comparison of uranium compounds.
- Added Section 6.12 for polyethylene packaging material sensitivity study and pellet chips.
- Added Section 6.13 for homogenous to heterogeneous particle size transition.
Non-Proprietary Information 9
Chapter 6 - Section 6.1 and 6.11 Included additional qualitative information about the uranium compounds used in the material property reactivity comparisons presented in Figures 6.0, 6.27, and 6.28 for the approved uranium compounds in Table 6.21.
o Figures 6.0, 6.27, and 6.28 are k-infinite material reactivity demonstrations to compare all approved uranium compounds from Table 6.21.
o NEDO-33881 Section 6.11 Table 6.21 was revised to provide a more consistent representation of the uranium compound chemical formulas.
o These demonstrations use the uranium compounds theoretical density to determine the optimal U-235-to-Hydrogen (U-235/H) Ratio.
o This sensitivity study is independent of NPC container proprieties and compound mass.
o For a more direct uranium compound comparison, the UFACT of each compound is determined to find the most bounding UFACT value.
o Figures 6.0, 6.27, and 6.28 demonstrate that the uranium compound with the highest UFACT (UO2) is the most bounding.
Non-Proprietary Information 10 Chapter 6 - Section 6.4.5
- Amended Section 6.4.5 to include the following additional information to explain the GEMER convergence plots in Figures 6.10a through 6.10d:
o The plots shown are for explicit model cases with homogeneous UO2 and H2O mixtures, but the results are also representative of the results for the heterogeneous lattices. These figures are composite illustration of the batches run and the batches skipped. The left half of the figure is for batches run and the right half of the figure is for batches skipped, divided in the middle of the figure. GEMER convergence can be observed in the profiles of batches run (left side of figure).
Non-Proprietary Information 11 Chapter 6 - Section 6.12 Sensitivity studies demonstrate that neglecting the packing materials is more conservative. Therefore, polyethylene packaging materials within the ICCAs is unrestricted provided the mean hydrogen atom density is not greater than water.
o Evaluate BWR, PWR, and optimal particle size payloads to determine optimal H/U-235 Ratio.
o 5x5x6 damaged package array with and without High-Density Polyethylene (HDPE).
Non-Proprietary Information 12 Chapter 6 - Section 6.13 Evaluation of the maximum particle size transition between homogeneous and heterogeneous material forms.
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Non-Proprietary Information 13 Chapter 6 - Section 6.13 (Continued)
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Non-Proprietary Information 14 Chapter 6 - Section 6.13 (Continued)
((-------------------------------------------------)) the homogeneous to heterogeneous particle size transition was determined occur at 1730 m.
Therefore, if the particle size distribution is such that a majority of the particles are 1730 m or greater, then the unrestricted heterogeneous particle size payload of NEDO-33881 Table 1.1 applies. If a majority of the particle size distribution is below 1730 m, then the homogenous payload in NEDO-33881 Table 1.1 remains valid.
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Non-Proprietary Information 15 Chapter 7 Amended Section 7.1.2 Item 1 to include the following additional information:
a)
Authorized contents and limitations are specified in Section 1.2.3.
b)
Shipments of powdered uranium compounds shall be secured within a poly bottle.
c)
Shipments of powdered material will always contain enough poly bottles to fill the inside of the ICCA body (no void spaces between bottles). For partial loadings, dunnage will be added within the ICCA to prevent internal movement of package contents [ML071760085].
Non-Proprietary Information 16 Summary of the NEDO-33881 Modifications
- No package or hardware modifications required for new uranium compounds and expanded payload.
- No changes to structural, thermal, containment, shielding, or acceptance testing and maintenance.
- The k-infinite material demonstrations in NEDO-33881 Chapter 6 prove that the uranium compound with the highest UFACT bounds all other approved uranium compounds.
- Neglecting HDPE packaging material is more conservative.
- A weight limit is not required for polyethylene packaging materials with a mean hydrogen atom density less than water.
- Homogenous to heterogeneous particle size transition occurs at 1730 m.
Non-Proprietary Information 17 Submittal Strategy and Timing
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- NEDO-33881 Rev. 7 documentation package provided to the NRC.
o Proprietary and non-proprietary versions of the NPC SAR in their entirety.