ML20054A404

Supplement to NACs Request for a Revision to Certificate of Compliance No. 9356 for the NAC Magnatran Transportation Package

ML20054A404
Person / Time
Site:	07109356
Issue date:	02/14/2020
From:	Fowler W NAC International
To:	Document Control Desk, Office of Nuclear Material Safety and Safeguards
References
ED20200020
Download: ML20054A404 (13)

Text

A NAC INTERNATIONAL Atlanta Corporate Headquarters 3930 East Jones Bridge Road, Suite 200 Norcross, GA 30092 Phone 770-447-1144 www.nacintl.com February 14, 2020 U.S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD, 20852-2738 Attn: Document Control Desk

Reference:

Supplement to NAC's Request for a Revision to Certificate of Compliance No. 9356 for the NAC MAGNATRAN Transportation Package.

Docket No. 71-9356

1.

Certificate of Compliance No. 9356, Revision 1, for the Model No.

MAGNATRAN Transport Package, U.S. Nuclear Regulatory Commission (NRC), August 3, 2019

2.

MAGNATRAN Transportation Package Safety Analysis Report (SAR),

Revision 0, April 2019

3.

ED20190116, NAC's Request for a Revision to Certificate of Compliance No.

9356 for the NAC MAGNATRAN Transportation Package, October 31, 2019 NAC International (NAC) hereby submits a supplement to the request to revise the MAGNATRAN Certificate of Compliance (CoC) No. 9356, Revision 1 (Reference 1). The additional changes herein to the CoC and to SAR Chapter 1 allow for provisions to have partial-length non-fuel rods/rodlets loaded in TSCs; with PWR basket assemblies and PWR DF basket assemblies.

Consistent :with NAC administrative practice, this proposed SAR revision is numbered to uniquely identify the applicable changed pages with MAGNATRAN Revision 20A on the top of each changed page. Revision bars mark the SAR text changes on the each of the affected pages in. The proposed changes to the CoC are contained in Enclosure 1. Enclosure 2 contains a summary of the changes to the SAR for Revision MAGNA TRAN 20A. In accordance with NAC's administrative practices, upon final acceptance of this application, the MAGNATRAN-19A and 20A changed pages will be reformatted and incorporated into the next revision of the MAGNATRAN SAR.

The change pages for the SAR are common to both the proprietary and non-proprietary versions.

These pages do not contain proprietary information, therefore, an Affidavit pursuant to 10 CFR 2.390 is not being provided.

ED20200020

A NAC I INTERNATIONAL U.S. Nuclear Regulatory Commission February 14, 2020 Page 2 of 2 Should you require further details regarding the submittal, please feel free to contact me at 678-328-1236.

Mr. Wren Fowler Director, Licensing Engineering

Enclosures:

- Proposed Changes for Certificate of Compliance Revision 2, NAC - MAGNATRAN SAR, Revision 20A - List of Changes, NAC - MAGNATRAN SAR, Revision 20A - SAR Page Changes and LOEP, NAC - MAGNA TRAN SAR, Revision 20A ED20200020 to ED2020020 Page 1 of2 Enclosures 1 MAGNATRAN, SAR 20A Proposed CoC Changes

Enclosure I to ED2020020 Page 2 of 2 Page 6 of 39 5.(b)(1 )(i)

Contents - Type and Form of Material (continued)

Undamaged PWR fuel assemblies may contain nonfuel hardware. Fuel assemblies with an instrument tube tie rod repair shall be loaded with fuel inserts and/or top spacers to ensure proper spacing and support for the fuel assembly. Fuel inserts and/or tops spacers are not required when using the extended fuel tube basket because the top nozzle is adequately supported. The nonfuel hardware may be loaded as a complete assembly or as individual components, however, the nonfuel hardware components loaded with a fuel assembly must be from a single nonfuel hardware assembly, individual non-fuel rods may be full-length rods or partial-length rods/rodlets. Partial-length rods/rodlets are permitted in guide tubes provided guide tube plug devices are installed. Nonfuel hardware must meet the exposure and cool time or cobalt-60 activity requirements in Tables 6-8. Fuel assemblies loaded with nonfuel hardware must meet the additional cool time requirements in Table 5 (for Type 2 neutron absorbers), and Table 15 (for Type 1 neutron absorbers).

Page 23 of 39 5.(b)(1 )(ii) Contents - Type and Form of Material (continued)

Undamaged PWR fuel assemblies may contain nonfuel hardware, while damaged PWR fuel assemblies shall not, with the exception of the following unirradiated nonfuel hardware:

instrument tube tie components, guide tube anchors or similar devices, and steel inserts. The nonfuel hardware may be loaded as a complete assembly or as individual components, ho*Never, the nonfuel hard*1.1are components loaded with a fuel assembly must be from a single nonfuel hardware assembly, individual non-fuel rods may be full-length rods or partial-length rods/rodlets. Partial-length rods/rodlets are permitted in guide tubes provided guide tube plug devices are installed. Fuel assemblies with an instrument tube tie rod repair shall be loaded with fuel inserts and/or top spacers to ensure proper spacing and support of the fuel assembly.

Fuel inserts and/or top spacers are not required when using the extended fuel tube basket because the top nozzle is adequately supported. Nonfuel hardware must meet the exposure and cool time or cobalt-60 activity requirements listed in Tables 6-8.

to ED2020020 Page 1 of2 Enclosures 2 MAGNATRAN, SAR 20A List of Changes to ED2020020 Page 2 of2 List of Changes for the MAGNATRAN SAR s'

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Note:

The List of Effective Pages and the Chapter Table of Contents, List of Figures and List of Tables have been revised accordingly to reflect the list of changes detailed below.

Chanter 1 Page 1.3-27 thru 1.3-29 Revised bullet 11.i where indicated, revised bullet 11.m where indicated, Text flow Page 1.3-30 thru 1.3-32 Revised bullet 12.1 where indicated, revised bullet 12.p where indicated, Text flow Chanter 2 No Changes Chanter 3 No Changes Chanter 4 No Changes Chanter 5 No Changes Chanter 6 No Changes Chanter 7 No Changes Chanter 8 No Changes to ED2020020 Page 1 of 1 Enclosures 3 MAGNATRAN, SAR 20A SAR Replacement Pages

MAGNATRAN Transport Cask SAR Docket No. 71-9356 February 2020 Revision 20A

i.

Undamaged PWR fuel assemblies may contain nonfuel hardware (NFHW). Fuel assembly lattices not containing the nominal number of fuel rods specified in Table 1.3-7 must contain solid filler rods that displace a volume equal to, or greater than, that of the fuel rod that the filler rod replaces. Fuel assemblies may have stainless steel rods inserted to displace guide tube "dashpot" water. The nonfuel hardware may be loaded as a complete assembly or as individual components, individual non-fuel rods may be full-length rods or partial-length rods/rodlets. Partial-length rods/rodlets are permitted to be loaded in guide tubes provided guide tube plug devices are installed. Nonfuel hardware cool times shall be in accordance with Tables 1.3-16 through 1.3-18. Alternatively, the 6°Co curie limits in Table 1.3-17 and Table 1.3-18 may be used to establish site-specific nonfuel hardware constraints. Note that fuel assemblies defined as CE14 and CE16 are not allowed to contain BPRA or TP type nonfuel hardware.

J.

Fuel spacers may be used in the TSCs to reduce axial gaps for the spent fuel assemblies and non-fuel hardware.

k. Unenriched and unirradiated (i.e., not inserted in-core) fuel assemblies are not authorized for loading. Unenriched axial blankets are permitted, provided that the nominal length of the blanket is not greater than six inches. An unenriched rod may be used as a replacement rod to return a fuel assembly to an undamaged condition.

1.

Reactor control components (RCC) are restricted to fuel storage locations No. 11, 12, 13, 18, 19, 20, 25, 26 and 27 (Figure 1.3-6). Minimum RCC cool times are:

Minimum Cool Time (years) 10 14 20 Interpolation is not allowed between data points.

Maximum Exposure (GWd/MTU) 180 270 360

m. One Neutron Source or Neutron Source Assembly (NSA) is permitted to be loaded in a TSC in fuel storage locations No. 11, 12, 13, 18, 19, 20, 25, 26 or 27 (Figure 1.3-6).

Neutron source assemblies may contain source rods attached to hardware similar in configuration to guide tube plug devices (thimble plugs) and burnable absorbers, in addition to containing burnable poison rodlets and/or thimble plug rodlets. Partial-length rods/rodlets are permitted to be loaded in guide tubes provided guide tube plug devices are installed. For NSAs containing absorber rodlets, the BPRA cool time and burnup/exposure or hardware 6°Co curie limit listed in Table 1.3-17 are applied to the NAC International 1.3-27

MAGNATRAN Transport Cask SAR Docket No. 71-9356 February 2020 Revision 20A neutron sources. NSAs having only thimble plug rodlets require the thimble plug restriction in Table 1.3-18 to be applied. Combination NSAs, containing both thimble plug and burnable absorber rodlets must apply the more limiting of the two minimum cool time/curie limit. Fuel assemblies loaded with the NSAs must apply the additional cool times listed in Table 1.3-16. Fuel types indicated as CE14 and CE16 are not permitted to be loaded with NSAs.

n. Fuel assemblies may contain any number ofunirradiated (i.e., not inserted in-core) nonfuel solid filler fuel replacement rods. Activated stainless steel rods are limited to five per assembly, one assembly per basket, at a maximum steel rod bumup/exposure of 32.5 GWd/MTU. Fuel assemblies with activated stainless-steel rods must be cooled either a minimum of 21 years or the Section 5.3 loading table minimum cool time plus one year, whichever is greater.

o. Westinghouse fuel assemblies may contain a hafnium absorber assembly (HFRA) at a maximum burnup/exposure of 4.0 GWd/MTU and a minimum cool time of 16 years.

Fuel assemblies loaded with an HFRA must apply the additional cool times listed in Table 1.3-16.

p. Under-burned (assemblies with bumup less than that dictated by the burnup credit loading curve) Westinghouse 15x15 PWR fuel assemblies may be loaded provided that they include Ag-In-Cd full-length RCCAs and are loaded in the basket locations that RCCs are allowed (see item 1 for RCCA loading). Bumup must be greater than or equal to 12,000 MWd/MTU. Enrichment must be equal to or less than 4.05 wt.% 235U. The basket must include absorber sheets with an effective 10B areal density of 0.036 g/cm2*

For the loading oflow burnup fuel, the RCCAs must be full length (i.e. spider component included). RCCA exposure must be equal to or less than 200,000 MWd/MTU. Any assemblies loaded without an RCCA inserted must meet the burnup credit loading curve for the applicable assembly loading profile.

12. Cask contents transported in a TSC with a DF Basket Assembly shall be uranium undamaged PWR fuel assemblies and damaged fuel ( damaged PWR fuel assemblies or PWR fuel debris) in accordance with the limiting values shown in Table 1.3-6 and Table 1.3-7 and shall meet the following specifications:

a. Zirconium-based alloy cladding.

b. For the 33 non-DFC fuel locations in the DF Basket Assembly, enrichment, post-irradiation cooling time and bumup credit load curves in accordance with Tables 1.3-6, 1.3-12 through 1.3-15, and Figure 1.3-6 for a TSC with a DF Basket Assembly containing DFCs. For a TSC with a DF Basket Assembly that does not contain any NAC International 1.3-28

MAGNATRAN Transport Cask SAR Docket No. 71-9356 February 2020 Revision 20A DFCs, the enrichment, post-irradiation cooling time and burnup credit load curves in accordance with Tables 1.3-6, 1.3-8 through 1.3-11, and Figure 1.3-4 may be used for all fuel locations.

c. For the up to four DFC locations in a DF Basket Assembly containing damaged fuel, the damaged fuel shall have a minimum burnup of 5 GW d/MTU, a maximum enrichment of 4.05 wt% 235U, and a minimum cool time of 15 years.

d. Maximum assembly average bumup shall be S 45,000 MWd/MTU. A fuel assembly with maximum assembly average bumup > 45,000 MWd/MTU shall be treated as damaged fuel and placed in a damaged fuel can for transport.

e. Decay heat per fuel assembly: 622 watts (590.5 watts for burnup > 45,000 MWd/MTU, includes non-fuel hardware contribution). For the PWR basket with neutron absorbers with Type 1 thermal conductivity (see Table 3.2-12), the decay heat per fuel assembly is limited to 595 watts

f.

Nominal fresh fuel assembly:

length (in.) S 167.0

g. Nominal fresh fuel assembly: width (in.)

S 8.54

h. Fuel assembly weight (lbs.): S 1,765 (including nonfuel hardware, DFCs and fuel spacers)

1.

Spent fuel contents shall be loaded in accordance with the loading tables in Section 5.8.3 with additional cool time for damaged fuel found in Table 5.8-49 ofthis SAR. The additional cool time from Table 5.8-49 applies to all assemblies loaded in a damaged fuel TSC with damaged fuel. High burnup fuel is treated as damaged fuel and must apply the damaged fuel delta cool time as applicable.

J.

Quantity per TSC: Up to a total of 3 7 undamaged PWR fuel assemblies, including up to four DFCs containing undamaged PWR fuel assemblies, damaged PWR fuel assemblies, and/or PWR fuel debris loaded in DFC location Nos. 4, 8, 30 and 34, as shown on Figure 1.3-4, for the DF Basket Assembly. Figure 1.3-6 indicates the fuel storage locations that shall be empty, at a minimum, when implementing the 36, 35 and 33 loading patterns for burnup credit purposes.

k. The contents of a DFC must be less than, or equivalent to, one undamaged PWR fuel assembly. PWR fuel assemblies loaded in a DFC shall not contain nonfuel hardware with the exception of instrument tube tie components, guide tube anchors or other similar devices, and steel inserts.

1.

Undamaged PWR fuel assemblies not loaded in a DFC may contain nonfuel hardware consistent with Table 1.3-16. Fuel assembly lattices not containing the nominal number NAC International 1.3-29

MAGNATRAN Transport Cask SAR Docket No. 71-9356 February 2020 Revision 20A of fuel rods specified in Table 1.3-7 must contain solid filler rods that displace a volume equal to, or greater than, that of the fuel rod that the filler rod replaces. Fuel assemblies may have stainless steel rods inserted to displace guide tube "dashpot" water. The nonfuel hardware may be loaded as a complete assembly or as individual components, individual non-fuel rods may be full-length rods or partial-length rods/rodlets. Partial-length rods/rodlets are permitted to be loaded in guide tubes provided guide tube plug devices are installed. Nonfuel hardware cool times shall be in accordance with Tables 1.3-16 through 1.3-18. Alternatively, the 6°Co curie limits in Tables 1.3-17 and 1.3-18 may be used to establish site-specific nonfuel hardware constraints. Note that fuel assemblies defined as CE14 and CE16 are not allowed to contain BPRA or TP type nonfuel hardware.

m. Fuel spacers may be used in the TSCs to reduce axial gaps for the spent fuel assemblies, non-fuel hardware or damaged fuel cans.

n. Unenriched and unirradiated (i.e., not inserted in-core) fuel assemblies are not authorized for loading. Unenriched axial blankets are permitted, provided that the nominal length of the blanket is not greater than six inches. An unemiched rod may be used as a replacement rod to return a fuel assembly to an undamaged condition.

o. Reactor control components (RCC) are restricted to fuel storage location Nos. 11, 12, 13, 18, 19, 20, 25, 26 and 27 (Figure 1.3-4). Minimum RCC cool times are:

Minimum Cool Time (years) 10 14 20 Interpolation is not allowed between data points.

Maximum Exposure (GWd/MTU) 180 270 360

p. One Neutron Source or Neutron Source Assembly (NSA) is permitted to be loaded in a TSC in fuel storage location Nos. 11, 12, 13, 18, 19, 20, 25, 26 or 27 (Figure 1.3-4).

Neutron source assemblies may contain source rods attached to hardware similar in configuration to guide tube plug devices (thimble plugs) and burnable absorbers, in addition to containing burnable poison rodlets and/or thimble plug rodlets. Partial-length rods/rodlets are permitted to be loaded in guide tubes provided guide tube plug devices are installed. For NSAs containing absorber rodlets, the BPRA cool time and burnup/exposure or hardware 6°Co curie limit listed in Table 1.3-17 are applied to the neutron sources. NSAs having only thimble plug rodlets require the thimble plug restriction in Table 1.3-18 to be applied. Combination NSAs, containing both thimble NAC International 1.3-30

MAGNATRAN Transport Cask SAR Docket No. 71-9356 February 2020 Revision 20A plug and burnable absorber rodlets must apply the more limiting of the two minimum cool time/curie limit. Fuel assemblies loaded with the NSAs must apply the additional cool times listed in Table 1.3-16. Fuel types indicated as CE14 and CE16 are not permitted to be loaded with NSAs.

q. Fuel assemblies may contain any number ofunirradiated (i.e., not inserted in-core) nonfuel solid filler fuel replacement rods. Activated stainless steel rods are limited to five per assembly, one assembly per basket, at a maximum steel rod burnup/exposure of 32.5 GWd/MTU. Fuel assemblies with activated stainless steel rods must be cooled either a minimum of21 years or the item 12.i indicated minimum cool time plus one year, whichever is greater.

r.

Westinghouse fuel assemblies may contain a hafnium absorber assembly (HFRA) at a maximum bumup/exposure of 4.0 GWd/MTU and a minimum cool time of 16 years.

Fuel assemblies loaded with an HFRA must apply the additional cool times listed in Table 1.3-16.

s. Under-burned (assemblies with burnup less than that dictated by the burnup credit loading curve) Westinghouse 15 x 15 PWR fuel assemblies may be loaded provided that they include Ag-In-Cd full-length RCCAs and are loaded in the basket locations that RCCs are allowed (see item o for RCCA loading). Burnup must be greater than or equal to 12,000 MWd/MTU. Enrichment must be equal to or less than 4.05 wt.% 235U. The basket must include absorber sheets with an effective 10B areal density of 0.036 g/cm2.

For the loading oflow burnup fuel, the RCCAs must be full length (i.e. spider component included). RCCA exposure must be equal to or less than 200,000 MWd/MTU. Any assemblies loaded without an RCCA inserted must meet the bumup credit loading curve for the applicable assembly loading profile.

t.

Damaged CE 16x16 fuel assemblies are not to be loaded in the MAGNATRAN system.

13. Cask contents transported in a TSC with a BWR fuel basket shall be uranium undamaged BWR fuel assemblies in accordance with the limiting values shown in Table 1.3-19 and Table 1.3-20 and shall meet the following specifications:

a. Zirconium-based alloy cladding.

b. Enrichment, post-irradiation cooling time and average assembly burnup in accordance with Tables 1.3-19, 1.3-21, and 1.3.-22 and Figures 1.3-5, 1.3-7 and 1.3-8.

c. Decay heat per fuel assembly: uniform loading 253 watts

d. Nominal fresh fuel dimensions: assembly length (in.) :S 176.2 NAC International 1.3-31

MAGNATRAN Transport Cask SAR Docket No. 71-9356

e. Assembly width (in.) :'.S 5.52 February 2020 Revision 20A

f.

Fuel assembly weight (lbs.)

'.S 739 lbs (including channel and fuel spacers) with a maximum contents weight of 62,656 lbs.

g. Spent fuel contents shall be loaded in accordance with the loading tables in Chapter 5, Section 5.8.4, of this SAR.

h. Quantity per TSC: up to 87 undamaged BWR fuel assemblies as shown in Figure 1.3-7.

1.

Allowable fuel assembly locations for the 82-assembly BWR fuel basket configurations are shown in Figure 1.3-5 (location numbering for the 82-assembly basket is the same as that shown for the 87-assembly basket in Figure 1.3-7).

J.

Prior to use of the 82-assembly configuration, the center cell weldment and upper weldments with blocking strap must be in place to physically block the designated nonfuel locations (shown in Figure 1.3-5). Less than 82 assemblies may be loaded when implementing the 82-Assembly configuration provided the required fuel storage locations are empty, at a minimum.

k. BWR fuel assemblies may be unchanneled, or channeled with zirconium-based alloy channels.

1.

BWR fuel assemblies with stainless steel channels are not authorized.

m. Fuel assembly lattices not containing the assembly type-specific nominal number of fuel rods specified in Table 1.3-20 must contain solid, unirradiated, filler rods that displace a volume equal to, or greater than, that of the fuel rod that the filler rod replaces

n. Spacers may be used in the TSCs to fill axial gaps and provide support for the spent fuel assemblies.

o. Unenriched and unirradiated (i.e., not inserted in-core) fuel assemblies are not authorized for loading. Unenriched axial blankets are permitted, provided that the nominal length of the blanket is not greater than six inches.

NAC International 1.3-32