ML21347A624
| ML21347A624 | |
| Person / Time | |
|---|---|
| Site: | 07109372 |
| Issue date: | 11/29/2021 |
| From: | Framatome |
| To: | Division of Fuel Management |
| P SAVEROT NRC/NMSS/DFM/STLB 3014157505 | |
| Shared Package | |
| ML21347A619 | List: |
| References | |
| Download: ML21347A624 (18) | |
Text
1 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved NRC Pre-Application Meeting TN-B1 Package Amendment And Letter Authorization Docket No. 9372 November 29, 2021
© Framatome All right reserved
2 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved
- 1. Purpose of Changes
- 2. Package Amendment
- 3. Letter Authorization
- 4. Proposed Schedule
- 5. Questions Agenda
3 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Support Channeled ATRIUM 11 Fuel Transport
Framatome recently issued a 10 CFR 71.95 Report for fuel channel side thickness exceeding maximum dimension during Browns Ferry reload
Latest Brunswick transport experienced unacceptable vibration
Improve shock isolating system within inner and outer container (multiple materials)
71.95 Report issued on exceeded fuel channel side thickness.
Miscellaneous Improvement
New Criticality Evaluation to address fuel assembly rotational orientation
Incorporate h_poly cross section SCALE errors identified by ORNL
Allow additional Inner and Outer container lid gasket materials
Protective rubber strip near forklift pockets and bolsters to be made optional Letter Authorization
Support March 2022 road tests utilizing enriched fuel assemblies to confirm vibration performance of multiple rubber options
Increase allowable fuel channel side thickness
Incorporate h_poly cross section SCALE errors identified by ORNL
Allow multiple rubber types within the inner container and shock isolation system Purpose
4 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Packaging Amendment
TN-B1 Packaging
5 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Packaging Amendment
Outer Container Shock Isolator Changes Rubber pads (4 assemblies per side)
Shock Isolators (4 assemblies per side)
6 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Packaging Amendment
Outer Container Shock Isolator Changes
Shock Isolator Material
Currently defined as natural rubber
Change material options to include synthetic rubber by eliminating natural
No primary safety function, used to maintain fuel assembly quality
Allow size variation, square versus round
Includes Drawing and Text Changes
From Natural Rubber to Rubber
SAR Drawing 105E3740, Item 9 (shock Isolator)
SAR Drawing 105E3739, Items 7, 8, 11 (rubber pads)
Add note to each drawing allowing size and shape variation
Section 2.2.2, Chemical, Galvanic, or Other Reactions (3 places)
Rubber to be defined as neoprene, butyl, nitrile, natural or synthetic type rubbers
Provide table with maximum defining limits (TBD) based on fuel assembly material control program
For example: Bromine = 150 ppm, Chlorides = 150 ppm, Fluorides = 150 ppm, Sulfur = 350 ppm
7 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Packaging Amendment
Synthetic Rubber Vibration Performance
8 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Packaging Amendment
Inner Container Allowable Foam Changes Revise to allow multiple types of rubber on any side
9 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Packaging Amendment
Inner Container Foam Changes
Foam Absorber Pad Under Fuel Assembly
Currently defined as Polyethylene Foam
Change material options to include Polyethylene Foam or discontinuous strips of rubber
Used to maintain fuel assembly quality, no change for NCT or HAC drops
Includes Drawing and Text Change(s)
SAR Drawing 105E3745, Item 40
From Polyethylene Foam to Polyethylene Foam or Rubber
Rubber to be defined as neoprene, butyl, nitrile, natural or synthetic type rubbers
Within inner container, all foam and rubber to be limited by minimum overall thickness and a maximum density to allow for multiple vibration configurations.
1.2, Package Description
2.2, Materials / Structural
No effect, changes provide consistent function for vibration control
3.5, Thermal HAC
No effect, conservatively not modeled
6.1, Criticality Design, 6.12, 11x11 Criticality Design
New maximum allowable density to be defined
7.4, Maintenance, Other Operations (no effective change)
10 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved
Outer and Inner Container Lid Gaskets Packaging Amendment
11 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved
Outer and Inner Container Lid Gaskets
Currently defined as Natural Rubber
Change material options to Rubber or Neoprene
No safety function, purpose of gasket is for dust seal not pressure retaining seal (Section 2.12.3)
Containment boundary is the fuel assembly cladding
Includes Drawing and Text Changes
105E3743, Item 12 (outer container gasket)
105E3743, Items 10 and 14 (inner container end lid gaskets)
105E3747, Items 17, 21 (inner container gaskets)
From Natural Rubber to Rubber or Neoprene
Material discussion in 2.2.2, Chemical, Galvanic, or Other Reactions
Compression discussion in 2.12.3, Outer Container Gasket Sealing Capability Packaging Amendment
12 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved
Outer Container Protective Pad Packaging Amendment 4 Locations (2 per side)
13 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved
Outer Container Protective Pads
Protective Pad on outside of container above fork pockets and bottom of bolsters
Currently defined as natural rubber
Change material options to include rubber or neoprene
No safety function, clarify pads are optional
Drawing Changes
105E3738, Items 27, 28, 29, 39
From Natural Rubber to Rubber or Neoprene
Clarify Flag Note 10; Rubber pad is optional
No Text Changes Needed Packaging Amendment
14 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved
New Criticality Evaluations
Fuel Assembly orientation
Currently, the Fuel Assembly orientation is for a single orientation and is controlled by administrative procedure for axial rotation
Fuel Channel Side Thickness
Increase 11 x 11 allowable fuel channel thickness to <0.315 cm from <0.254 cm
Incorporate h_poly Cross Section SCALE Errors Identified by ORNL
Include penalty for h_poly cross section error
Inner Container
Additional materials allowed including neoprene, butyl, natural or synthetic type rubbers
Additional materials are bounded by polyethylene in the criticality evaluation
Chapter 6 Changes
New evaluation for fuel orientation
Revise existing evaluation and Chapter 6 information to increase allowable channel thickness
Criticality evaluation to establish maximum density conservatively based on polyethelene
New CSI value
CSI =1.5 (from 1.0)
Change is due to allowable fuel assembly rotation Packaging Amendment
15 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved
Letter Authorization Items
Minimum Changes Needed to Support Road Tests for Channeled 11x11 Fuel Assemblies
Maximum of two shipments (2nd based on results of 1st test)
Each shipment will include up to three TN-B1 packages each with up to two channeled fuel assemblies
Up to 6 channeled fuel assemblies per shipment
Will include additional empty packages
Replace Shock Isolator Material and Pad Sizes
Change material options to include synthetic rubber by eliminating natural
Allow variable sizes for shock isolator and pads
Inner Container Foam Absorber Pad Under Fuel Assembly
Change material options to include rubber
Criticality evaluation to establish maximum density conservatively based on polyethelene
Fuel Channel Side Thickness
Increase allowable fuel channel thickness from <0.254 to <0.315 cm
Incorporate h_poly cross section SCALE errors identified by ORNL
No CSI change
CSI=1.0 (no change)
Letter Authorization does not include fuel rotation allowance Letter Authorization
16 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Proposed Schedule
17 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Questions/Discussion
?
18 TN-B1 License Amendment - November 29, 2021
© Framatome All right reserved Thank You