Text

International, 5018056 Att 1 Proposed CoC 1032 Amd 5 (Non-Proprietary)
	ML18019A435
Person / Time
Site:	07201032
Issue date:	01/12/2018
From:	; Holtec
To:	; Office of Nuclear Material Safety and Safeguards
References
	5018056
	Download: ML18019A435 (26)
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Definitions 1.1 Certificate of Compliance No. 1032 Amendment No. 5 Appendix A 1.1-3 1.1 Definitions Term Definition assemblies, instrument tube tie rods (ITTRs),

vibration suppressor inserts, and components of these devices such as individual rods.

OVERPACK OVERPACKs are the casks which receive and contain the sealed MPCs for interim storage on the ISFSI.

They provide gamma and neutron shielding, and provide for ventilated air flow to promote heat transfer from the MPC to the environs. The term OVERPACK does not include the TRANSFER CASK.

PLANAR-AVERAGE INITIAL ENRICHMENT PLANAR AVERAGE INITIAL ENRICHMENT is the average of the distributed fuel rod initial enrichments within a given axial plane of the assembly lattice.

REPAIRED/RECONSITUTED FUEL ASSEMBLY Spent nuclear fuel assembly which contains dummy fuel rods that displaces an amount of water greater than or equal to the original fuel rods and/or which contains structural repairs so it can be handled by normal means. If irradiated dummy stainless steel rods are present in the fuel assembly, the dummy/replacement rods will be considered in the site specific dose calculations.

SPENT FUEL STORAGE CASKS (SFSCs)

SFSCs are containers approved for the storage of spent fuel assemblies at the ISFSI. The HI-STORM FW SFSC System consists of the OVERPACK and its integral MPC.

STORAGE OPERATIONS STORAGE OPERATIONS include all licensed activities that are performed at the ISFSI while an SFSC containing spent fuel is situated within the ISFSI perimeter. STORAGE OPERATIONS does not include MPC TRANSFER.

TRANSFER CASK TRANSFER CASKs are containers designed to contain the MPC during and after loading of spent fuel assemblies, and prior to and during unloading and to transfer the MPC to or from the OVERPACK.

TRANSPORT OPERATIONS TRANSPORT OPERATIONS include all licensed activities performed on an OVERPACK or TRANSFER CASK loaded with one or more fuel assemblies when it is being moved after LOADING OPERATIONS or before UNLOADING OPERATIONS. TRANSPORT OPERATIONS begin when the OVERPACK or TRANSFER CASK is first suspended from or secured ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 1 of 26

SFSC Heat Removal System 3.1.2 Certificate of Compliance No. 1032 Amendment No. 4 Appendix A 3.1.2-2 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.1.2 Verify all OVERPACK inlets and outlets are free of blockage from solid debris or floodwater.

24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months OR For OVERPACKS with installed temperature monitoring equipment, verify that the difference between the average OVERPACK air outlet temperature and ISFSI ambient temperature is:

137oF for OVERPACKS containing MPC-37s,

139oF for OVERPACKS containing BWR

MPCs,

130 oF for OVERPACKS containing MPC-32MLs,

128 oF for OVERPACKS containing MPC-31Cs 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 2 of 26

3.4 Tables Certificate of Compliance No. 1032 Amendment No. 4 Appendix A 3.4-1 Table 3-1 MPC Cavity Drying Limits Fuel Burnup (MWD/MTU)

MPC Type MPC Heat Load (kW)

Method of Moisture Removal (Notes 1 and 2)

All Assemblies 45,000 MPC-37 44.09 (Pattern A in Table 2.3-1A of Appendix B) 45.00 (Pattern B in Table 2.3-1A of Appendix B) 37.4 (Figures 2.3-1 through 2.3-3 of Appendix B) 39.95 (Figures 2.3-4 through 2.3-6 of Appendix B) 44.85 (Figures 2.3-7 through 2.3-9 of Appendix B)

VDS (Notes 3 and 4) or FHD (Note 4)

MPC-32ML 44.16 (Pattern A in Table 2.3-5 of Appendix B)

MPC-31C 32.98 (Pattern A in Table 2.3-6 of Appendix B) 43.4 (Note 5) (Pattern C in Table 2.3-6 of Appendix B)

MPC-89 46.36 (Table 2.3-2A of Appendix B) 46.2 (Figures 2.3-10 and 2.3-11 of Appendix B)

One or more assemblies

> 45,000 MPC-37 29.6 (Table 2.3-3 of Appendix B)

VDS (Notes 3 and 4) or FHD (Note 4)

MPC-32ML 28.70 (Pattern B in Table 2.3-5 of Appendix B)

MPC-31C 17.36 (Pattern B in Table 2.3-6 of Appendix B) 43.4 (Note 5) (Pattern C in Table 2.3-6 of Appendix B)

MPC-89 30.0 (Table 2.3-4 of Appendix B)

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 3 of 26

3.4 Tables Certificate of Compliance No. 1032 Amendment No. 4 Appendix A 3.4-2 Fuel Burnup (MWD/MTU)

MPC Type MPC Heat Load (kW)

Method of Moisture Removal (Notes 1 and 2)

One or more assemblies

> 45,000 MPC-37 44.09 (Table 2.3-1A of Appendix B) 45.00 (Table 2.3-1B of Appendix B) 37.4 (Figures 2.3-1 through 2.3-3 of Appendix B) 39.95 (Figures 2.3-4 through 2.3-6 of Appendix B) 44.85 (Figures 2.3-7 through 2.3-9 of Appendix B)

FHD (Note 4)

MPC-32ML 44.16 (Pattern A in Table 2.3-5 of Appendix B)

MPC-31C 43.4 (Pattern C in Table 2.3-6 of Appendix B)

MPC-89 46.36 (Table 2.3-2A of Appendix B) 46.2 (Figures 2.3-10 and 2.3-11 of Appendix B)

Notes:

1.

VDS means a vacuum drying system. The acceptance criterion when using a VDS is the MPC cavity pressure shall be 3 torr for 30 minutes while the MPC is isolated from the vacuum pump.

2.

FHD means a forced helium dehydration system. The acceptance criterion when using an FHD system is the gas temperature exiting the demoisturizer shall be 21oF for 30 minutes or the gas dew point exiting the MPC shall be 22.9oF for 30 minutes.

3.

Vacuum drying of the MPC must be performed with the annular gap between the MPC and the TRANSFER CASK filled with water.

4.

Heat load limits are set for each cell; see Appendix B Section 2.3.

5.

Vacuum drying of the MPC must be performed using cycles of the drying system, according to the guidance contained in ISG-11 Revision 3. The time limit for these cycles shall be determined based on site specific conditions.

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 4 of 26

3.4 Tables Certificate of Compliance No. 1032 Amendment No. 4 Appendix A 3.4-3 Table 3-2 MPC Helium Backfill Limits1 MPC Model Decay Heat Limits Applied (per Appendix B Section 2.3)

Pressure range (psig)

MPC-37 Table 2.3-1C Table 2.3-3 42.0 and 50.0 MPC-37 Table 2.3-1B 42.0 and 47.8 MPC-37 Table 2.3-1A, Pattern A 42.0 and 45.5 MPC-37 Table 2.3-1A, Pattern B 41.0 and 46.0 MPC-37 Figure 2.3-1 Figure 2.3-2 Figure 2.3-3 45.5 and 49.0 MPC-37 Figure 2.3-4 Figure 2.3-5 Figure 2.3-6 44.0 and 47.5 MPC-37 Figure 2.3-7 Figure 2.3-8 Figure 2.3-9 44.5 and 48.0 MPC-89 Table 2.3-2B Table 2.3-4 42.0 and 50.0 MPC-89 Table 2.3-2A 42.5 and 47.5 MPC-89 Figure 2.3-10 Figure 2.3-11 42.0 and 47.0 MPC-32ML Table 2.3-5, All Patterns 41.5 and 45.5 MPC-31C Table 2.3-6, All Patterns 41.5 and 45.5 1 Helium used for backfill of MPC shall have a purity of 99.995%. Pressure range is at a reference temperature of 70oF ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 5 of 26

Certificate of Compliance No. 1032 Amendment No. 5 Appendix B i

TABLE OF CONTENTS 1.0 DEFINITIONS........................................................................................................ 1-1 2.0 APPROVED CONTENTS...................................................................................... 2-1 2.1 Fuel Specifications and Loading Conditions...................................................... 2-1 2.2 Violations........................................................................................................... 2-1 2.3 Decay Heat Limits........................................................................................... 2-25 2.4 Burnup Credit.................................................................................................. 2-29 Figure 2.1-1 MPC-37 Region-Cell Identification...................................................... 2-2 Figure 2.1-2 MPC-89 Region-Cell Identification...................................................... 2-3 Figure 2.1-3 MPC-32ML Cell Identification............................................................. 2-4 Figure 2.1-4 MPC-31C Cell Identification................................................................ 2-5 Table 2.1-1 Fuel Assembly Limits.......................................................................... 2-7 Table 2.1-2 PWR Fuel Assembly Characteristics................................................ 2-14 Table 2.1-3 BWR Fuel Assembly Characteristics................................................ 2-19 Table 2.1-4 Restrictions for Gadolinium Credit.................................................... 2-24 Table 2.3-1A MPC-37 Heat Load Data................................................................... 2-25 Table 2.3-1B MPC-37 Heat Load Data................................................................... 2-25 Table 2.3-1C MPC-37 Heat Load Data................................................................... 2-26 Table 2.3-2A MPC-89 Heat Load Data................................................................... 2-26 Table 2.3-2B MPC-89 Heat Load Data................................................................... 2-26 Table 2.3-3 MPC-37 Heat Load Data................................................................... 2-27 Table 2.3-4 MPC-89 Heat Load Data................................................................... 2-27 Table 2.3-5 MPC-32ML Heat Load Data.............................................................. 2-27 Table 2.3-6 MPC-31C Heat Load Data................................................................ 2-28 Figure 2.3-1 Alternative MPC-37 Loading Pattern for MPCs Containing Only Undamaged Fuel, Short Fuel per Cell Heat Load Limits................ 2-29 Figure 2.3-2 Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel in DFC, Short Fuel per Cell Heat Load Limits

.......................................................................................................... 2-30 Figure 2.3-3 Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel and/or Fuel Debris in DFCs, Short Fuel per Cell Heat Load Limits........................................................................ 2-31 Figure 2.3-4 Alternative MPC-37 Loading Pattern for MPCs Containing Only Undamaged Fuel, Standard Fuel per Cell Heat Load Limits.......... 2-32 Figure 2.3-5 Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel in DFC, Standard Fuel per Cell Heat Load Limits................................................................................................ 2-33 Figure 2.3-6 Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel and/or Fuel Debris in DFCs, Standard Fuel per Cell Heat Load Limits.................................................................. 2-34 ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 6 of 26

Certificate of Compliance No. 1032 Amendment No. 5 Appendix B ii Figure 2.3-7 Alternative MPC-37 Loading Pattern for MPCs Containing Only Undamaged Fuel, Long Fuel per Cell Heat Load Limits................. 2-35 Figure 2.3-8 Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel in DFC, Long Fuel per Cell Heat Load Limits

.......................................................................................................... 2-36 Figure 2.3-9 Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel and/or Fuel Debris in DFCs, Long Fuel per Cell Heat Load Limits........................................................................ 2-37 Figure 2.3-10 Alternative MPC-89 Loading Pattern for MPCs Containing Only Undamaged Fuel per Cell Heat Load Limits..................................... 2-38 Figure 2.3-11 MPC-89 Loading Pattern for MPCs Containing Undamaged and Damaged Fuel and/or Fuel Debris in DFCs, per Cell Heat Load Limits

.......................................................................................................... 2-39 3.0 DESIGN FEATURES............................................................................................. 3-1 3.1 Site.................................................................................................................... 3-1 3.2 Design Features Important for Criticality Control............................................... 3-1 3.3 Codes and Standards........................................................................................ 3-1 3.4 Site Specific Parameters and Analyses............................................................. 3-9 3.5 Combustible Gas Monitoring During MPC Lid Welding and Cutting................ 3-12 Table 3-1 List of ASME Code Alternatives for Multi-Purpose Canisters (MPCs).... 3-3 Table 3-2 REFERENCE ASME CODE PARAGRAPHS FOR HI-STORM FW OVERPACK and HI-TRAC VW TRANSFER CASK, PRIMARY LOAD BEARING PARTS.................................................................................. 3-8 ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 7 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-6 Table 2.1-1 (page 1 of 8)

Fuel Assembly Limits I. MPC MODEL: MPC-37 A. Allowable Contents

1. Uranium oxide PWR UNDAMAGED FUEL ASSEMBLIES, DAMAGED FUEL ASSEMBLIES, and/or FUEL DEBRIS meeting the criteria in Table 2.1-2, with or without NON-FUEL HARDWARE and meeting the following specifications (Note 1):

a. Cladding Type:

ZR

b. Maximum Initial Enrichment:

5.0 wt. % U-235 with soluble boron credit per LCO 3.3.1 OR burnup credit per Section 2.4

c. Post-irradiation Cooling Time and Average Burnup Per Assembly:

Cooling Time 2 years Assembly Average Burnup 68.2 GWD/MTU

d. Decay Heat Per Fuel Storage Location:

As specified in Section 2.3

e. Fuel Assembly Length:

199.2 inches (nominal design including NON-FUEL HARDWARE and DFC)

f. Fuel Assembly Width:

8.54 inches (nominal design)

g. Fuel Assembly Weight:

2050 lbs (including NON-FUEL HARDWARE and DFC)

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 8 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-7 Table 2.1-1 (page 2 of 8)

Fuel Assembly Limits I. MPC MODEL: MPC-37 (continued)

B. Quantity per MPC: 37 FUEL ASSEMBLIES with up to twelve (12) DAMAGED FUEL ASSEMBLIES or FUEL DEBRIS in DAMAGED FUEL CONTAINERS (DFCs). DFCs may be stored in fuel storage locations 3-1, 3-3 through 3-7, 3-10 through 3-14, and 3-16 (see Figure 2.1-1), OR in fuel storage locations 2-1, 2-3, 2-4, 2-5, 2-8, 2-9, 2-10, and 2-12 (see Figure 2.1-1), depending on heat load pattern, see Section 2.3.1. The remaining fuel storage locations may be filled with PWR UNDAMAGED FUEL ASSEMBLIES meeting the applicable specifications. For MPCs utilizing burnup credit, the MPC and DFC loading configuration must also meet the additional requirements of Section 2.4.

C. One (1) Neutron Source Assembly (NSA) is authorized for loading in the MPC-

37.

D. Up to thirty (30) BRPAs are authorized for loading in the MPC-37.

Note 1: Fuel assemblies containing BPRAs, TPDs, WABAs, water displacement guide tube plugs, orifice rod assemblies, or vibration suppressor inserts, with or without ITTRs, may be stored in any fuel storage location. Fuel assemblies containing APSRs, RCCAs, CEAs, CRAs (including, but not limited to those with hafnium), or NSAs may only be loaded in fuel storage Regions 1 and 2 (see Figure 2.1-1).

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 9 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-8 Table 2.1-1 (page 3 of 8)

Fuel Assembly Limits II. MPC MODEL: MPC-89 A. Allowable Contents

1. Uranium oxide BWR UNDAMAGED FUEL ASSEMBLIES, DAMAGED FUEL ASSEMBLIES, and/or FUEL DEBRIS meeting the criteria in Table 2.1-3, with or without channels and meeting the following specifications:

a. Cladding Type:

ZR

b. Maximum PLANAR-AVERAGE INITIAL ENRICHMENT(Note 1):

As specified in Table 2.1-3 for the applicable fuel assembly array/class.

c. Initial Maximum Rod Enrichment 5.0 wt. % U-235

d. Post-irradiation Cooling Time and Average Burnup Per Assembly

i. Array/Class 8x8F Cooling time 10 years and an assembly average burnup 27.5 GWD/MTU.

ii. All Other Array Classes Cooling Time 2 years and an assembly average burnup 65 GWD/MTU

e. Decay Heat Per Assembly

i. Array/Class 8x8F 183.5 Watts ii. All Other Array Classes As specified in Section 2.3

f. Fuel Assembly Length 176.5 inches (nominal design)

g. Fuel Assembly Width 5.95 inches (nominal design)

h. Fuel Assembly Weight 850 lbs, including a DFC as well as a channel ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 10 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-9 Table 2.1-1 (page 4 of 8)

Fuel Assembly Limits II. MPC MODEL: MPC-89 (continued)

B. Quantity per MPC: 89 FUEL ASSEMBLIES with up to sixteen (16) DAMAGED FUEL ASSEMBLIES or FUEL DEBRIS in DAMAGED FUEL CONTAINERS (DFCs). DFCs may be stored in fuel storage locations 3-1, 3-3, 3-4, 3-9, 3-10, 3-13, 3-16, 3-19, 3-22, 3-25, 3-28, 3-31, 3-32, 3-37, 3-38, and 3-40 (see Figure 2.1-2), OR in fuel storage locations 2-1, 2-2, 2-6, 2-7, 2-13, 2-18, 2-23, 2-28, 2-34, 2-35, 2-39, and 2-40 (see Figure 2.1-2), depending on heat load pattern, see Section 2.3.1. The remaining fuel storage locations may be filled with BWR UNDAMAGED FUEL ASSEMBLIES meeting the applicable specifications.

Note 1: The lowest maximum allowable enrichment of any fuel assembly loaded in an MPC-89, based on fuel array class and fuel classification, is the maximum allowable enrichment for the remainder of the assemblies loaded in that MPC.

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 11 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-22 Table 2.1-3 (page 4 of 4)

BWR FUEL ASSEMBLY CHARACTERISTICS (Note 1)

Fuel Assembly Array and Class 10x10 C 10x10 F 10x10 G 10x10 I 11x11 A Maximum Planar-Average Initial Enrichment (wt.%

235U) (Note 14)

< 4.8

< 4.7 (Note 13)

< 4.6 (Note 12)

< 4.8

< 4.8 Maximum Planar-Average Initial Enrichment with Gadolinium Credit(wt.%

235U) (Note 15) 5.0 5.0 5.0 N/A N/A No. of Fuel Rod Locations 96 92/78 (Note 7) 96/84 91/79 112/92 Fuel Clad O.D. (in.)

> 0.3780

> 0.4035

> 0.387

> 0.4047

> 0.3701 Fuel Clad I.D. (in.)

< 0.3294

< 0.3570

< 0.340

< 0.3559

< 0.3252 Fuel Pellet Dia. (in.)

< 0.3224

< 0.3500

< 0.334

< 0.3492

< 0.3193 Fuel Rod Pitch (in.)

< 0.488

< 0.510

< 0.512

< 0.5100

< 0.4705 Design Active Fuel Length (in.)

< 150

< 150 No. of Water Rods (Note

10) 5 (Note 9) 2 5

(Note 9) 1 (Note 5) 1 (Note 5)

Water Rod Thickness (in.)

> 0.031

> 0.030

> 0.031

> 0.0315

> 0.0340 Channel Thickness (in.)

< 0.055

< 0.120

< 0.060

< 0.100

< 0.100 ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 12 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-25 2.3 Decay Heat Limits (Changes in blue are due to RAI response)

This section provides the limits on fuel assembly decay heat for storage in the HI-STORM FW System. The method to verify compliance, including examples, is provided in Chapter 13 of the HI-STORM FW FSAR.

2.3.1 Fuel Loading Decay Heat Limits Tables 2.3-1A, 2.3-1B, and 2.3-1C provide the maximum allowable decay heat per fuel storage location for MPC-37. Tables 2.3-2A and 2.3-2B provide the maximum allowable decay heat per fuel storage location for MPC-89. The limits in these tables are applicable when using FHD to dry moderate or high burnup fuel and when using VDS to dry moderate burnup fuel only. Tables 2.3-3 and 2.3-4 provide the maximum allowable decay heat per fuel storage location for MPC-37 and MPC-89, respectively, when using VDS to dry high burnup fuel. Tables 2.3-5 and 2.3-6 provide the maximum allowable decay heat per fuel storage location for the MPC-32ML and MPC-31C for both FHD and VDS drying. The per cell limits in these tables apply to cells containing undamaged fuel or damaged fuel or fuel debris in DFCs.

Figures 2.3-1 through 2.3-11 provide alternative loading patterns for the MPC-37 and MPC-89, with either all undamaged fuel or a combination of undamaged fuel and damaged fuel and fuel debris in DFCs. The per cell limits in these figures are applicable when using FHD to dry moderate or high burnup fuel and when using VDS to dry moderate burnup fuel only.

The MPC-37 patterns are based on the fuel length to be stored in the MPC, see Table 2.3-7.

TABLE 2.3-1A MPC-37 HEAT LOAD DATA (See Figure 2.1-1)

Number of Regions:

3 Number of Storage Cells: 37 Maximum Design Basis Heat Load (kW):

44.09 (Pattern A); 45.0 (Pattern B)

Region No.

Decay Heat Limit per Cell, kW Number of Cells per Region Decay Heat Limit per Region, kW Pattern A Pattern B Pattern A Pattern B 1

1.05 1.0 9

9.45 9.0 2

1.70 1.2 12 20.4 14.4 3

0.89 1.35 16 14.24 21.6 ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 13 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-28 TABLE 2.3-5 MPC-32ML HEAT LOAD DATA Number of Regions:

1 Number of Storage Cells: 32 Pattern Maximum Heat Load, kW Decay Heat Limit per Cell, kW Pattern A 44.16 1.380 Pattern B 28.70 0.897 TABLE 2.3-6 MPC-31C HEAT LOAD DATA Number of Regions:

1 Number of Storage Cells: 31 Pattern Maximum Heat Load, kW Decay Heat Limit per Cell, kW Pattern A 32.98 1.064 Pattern B 17.36 0.560 Pattern C 43.4 1.400 TABLE 2.3-7 PWR FUEL LENGTH CATEGORIES Category Length Range Short Fuel 128 inches L < 144 inches Standard Fuel 144 inches L < 168 inches Long Fuel L 168 inches Notes:

1.

L means "nominal active fuel length". The nominal, unirradiated active fuel length of the PWR fuel assembly is used to designate it as short, standard and long.

2.3.2 When complying with the maximum fuel storage location decay heat limits, users must account for the decay heat from both the fuel assembly and any NON-FUEL HARDWARE, as applicable for the particular fuel storage location, to ensure the decay heat emitted by all contents in a storage location does not exceed the limit.

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 14 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-29 0.45 0.45 0.45 0.45 3.2 0.5 3.2 0.45 0.6 2.4 0.5 0.6 0.5 2.4 0.6 0.6 0.5 0.6 0.5 0.6 0.5 0.6 0.6 2.4 0.5 0.6 0.5 2.4 0.6 0.45 3.2 0.5 3.2 0.45 0.45 0.45 0.45 Figure 2.3-1: Alternative MPC-37 Loading Pattern for MPCs Containing Only Undamaged Fuel, Short Fuel per Cell Heat Load Limits (All storage cell heat loads are in kW)

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 15 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-30 0.45 0.45 0.45 0.45 3.2 (D)

Empty 3.2 (D) 0.45 0.6 2.4 (D)

Empty 0.6 Empty 2.4 (D) 0.6 0.6 0.5 0.6 0.5 0.6 0.5 0.6 0.6 2.4 (D)

Empty 0.6 Empty 2.4 (D) 0.6 0.45 3.2 (D)

Empty 3.2 (D) 0.45 0.45 0.45 0.45 Figure 2.3-2: Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel in DFC, Short Fuel per Cell Heat Load Limits (All storage cell heat loads are in kW, Undamaged Fuel or Damaged Fuel in a DFC may be stored in cells denoted by D. Cells denoted as Empty must remain empty regardless of the contents of the adjacent cell)

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 16 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-31 0.45 0.45 0.45 0.45 3.2 (D/F)

Empty 3.2 (D/F) 0.45 0.6 2.4 Empty 0.6 Empty 2.4 0.6 0.6 0.5 0.6 0.5 0.6 0.5 0.6 0.6 2.4 Empty 0.6 Empty 2.4 0.6 0.45 3.2 (D/F)

Empty 3.2 (D/F) 0.45 0.45 0.45 0.45 Figure 2.3-3: Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel and/or Fuel Debris in DFCs, Short Fuel per Cell Heat Load Limits (All storage cell heat loads are in kW, Undamaged Fuel or Damaged Fuel or Fuel Debris in a DFC may be stored in cells denoted by D/F. Cells denoted as Empty must remain empty regardless of the contents of the adjacent cell)

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 17 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-32 0.55 0.55 0.55 0.55 3.2 0.55 3.2 0.55 0.75 2.4 0.55 0.65 0.55 2.4 0.75 0.75 0.55 0.65 0.55 0.65 0.55 0.75 0.75 2.4 0.55 0.65 0.55 2.4 0.75 0.55 3.2 0.55 3.2 0.55 0.55 0.55 0.55 Figure 2.3-4: Alternative MPC-37 Loading Pattern for MPCs Containing Only Undamaged Fuel, Standard Fuel per Cell Heat Load Limits (All storage cell heat loads are in kW)

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 18 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-33 0.55 0.55 0.55 0.55 3.2 (D)

Empty 3.2 (D) 0.55 0.75 2.4 (D)

Empty 0.65 Empty 2.4 (D) 0.75 0.75 0.55 0.65 0.55 0.65 0.55 0.75 0.75 2.4 (D)

Empty 0.65 Empty 2.4 (D) 0.75 0.55 3.2 (D)

Empty 3.2 (D) 0.55 0.55 0.55 0.55 Figure 2.3-5: Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel in DFCs, Standard Fuel per Cell Heat Load Limits (All storage cell heat loads are in kW, D Undamaged Fuel or Damaged Fuel in a DFC may be stored in cells denoted by D. Cells denoted as Empty must remain empty regardless of the contents of the adjacent cell)

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 19 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-34 0.55 0.55 0.55 0.55 3.2 (D/F)

Empty 3.2 (D/F) 0.55 0.75 2.4 Empty 0.65 Empty 2.4 0.75 0.75 0.55 0.65 0.55 0.65 0.55 0.75 0.75 2.4 Empty 0.65 Empty 2.4 0.75 0.55 3.2 (D/F)

Empty 3.2 (D/F) 0.55 0.55 0.55 0.55 Figure 2.3-6: MPC-37 Heat Load Chart for MPCs Containing Undamaged Fuel and Damaged Fuel and/or Fuel Debris in DFCs, Standard Fuel per Cell Heat Load Limits (All storage cell heat loads are in kW, Undamaged Fuel or Damaged Fuel or Fuel Debris in a DFC may be stored in cells denoted by D/F. Cells denoted as Empty must remain empty regardless of the contents of the adjacent cell.)

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 20 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-35 0.65 0.65 0.65 0.65 3.5 0.65 3.5 0.65 0.85 2.6 0.65 0.75 0.65 2.6 0.85 0.85 0.65 0.75 0.65 0.75 0.65 0.85 0.85 2.6 0.65 0.75 0.65 2.6 0.85 0.65 3.5 0.65 3.5 0.65 0.65 0.65 0.65 Figure 2.3-7: Alternative MPC-37 Loading Pattern for MPCs Containing Only Undamaged Fuel, Long Fuel per Cell Heat Load Limits (All storage cell heat loads are in kW)

ATTACHMENT 1 TO HOLTEC LETTER 5018056 Page 21 of 26

Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-36 0.65 0.65 0.65 0.65 3.5 (D)

Empty 3.5 (D) 0.65 0.85 2.6 (D)

Empty 0.75 Empty 2.6 (D) 0.85 0.85 0.65 0.75 0.65 0.75 0.65 0.85 0.85 2.6 (D)

Empty 0.75 Empty 2.6 (D) 0.85 0.65 3.5 (D)

Empty 3.5 (D) 0.65 0.65 0.65 0.65 Figure 2.3-8: Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel in DFCs, Long Fuel per Cell Heat Load Limits (All storage cell heat loads are in kW, D means Undamaged Fuel or Damaged Fuel in a DFC may be stored in cells denoted by D. Cells denoted as Empty must remain empty regardless of the contents of the adjacent cell)

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Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-37 0.65 0.65 0.65 0.65 3.5 (D/F)

Empty 3.5 (D/F) 0.65 0.85 2.6 Empty 0.75 Empty 2.6 0.85 0.85 0.65 0.75 0.65 0.75 0.65 0.85 0.85 2.6 Empty 0.75 Empty 2.6 0.85 0.65 3.5 (D/F)

Empty 3.5 (D/F) 0.65 0.65 0.65 0.65 Figure 2.3-9: Alternative MPC-37 Loading Pattern for MPCs Containing Undamaged Fuel and Damaged Fuel and/or Fuel Debris in DFCs, Long Fuel per Cell Heat Load Limit (All storage cell heat loads are in kW, Undamaged Fuel or Damaged Fuel or Fuel Debris in a DFC may be stored in cells denoted by D/F. Cells denoted as Empty must remain empty regardless of the contents of the adjacent cell)

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Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-38 0.25 0.25 0.25 0.25 0.25 0.25 1.45 0.25 0.25 0.25 0.25 0.25 1.45 0.9 0.9 0.9 1.45 0.25 0.25 0.25 1.45 0.32 0.32 0.32 0.32 0.32 1.45 0.25 0.25 0.25 0.9 0.32 0.32 0.32 0.32 0.32 0.9 0.25 0.25 0.25 1.45 0.9 0.32 0.32 0.32 0.32 0.32 0.9 1.45 0.25 0.25 0.25 0.9 0.32 0.32 0.32 0.32 0.32 0.9 0.25 0.25 0.25 1.45 0.32 0.32 0.32 0.32 0.32 1.45 0.25 0.25 0.25 1.45 0.9 0.9 0.9 1.45 0.25 0.25 0.25 0.25 0.25 1.45 0.25 0.25 0.25 0.25 0.25 0.25 Figure 2.3-10: Alternative MPC-89 Loading Pattern for MPCs Containing Only Undamaged Fuel per Cell Heat Load Limits (All Storage cell heat loads are in kW)

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Approved Contents 2.0 Certificate of Compliance No.1032 Amendment No. 5 Appendix B 2-39 0.25 0.25 0.25 0.25 0.25 0.25 1.45 (D/F) 0.25 0.25 0.25 0.25 0.25 1.45 (D/F) 0.9 0.9 0.9 1.45 (D/F) 0.25 0.25 0.25 1.45 (D/F)

Empty 0.32 0.32 0.32 Empty 1.45 (D/F) 0.25 0.25 0.25 0.9 0.32 0.32 0.32 0.32 0.32 0.9 0.25 0.25 0.25 1.45 (D/F) 0.9 0.32 0.32 0.32 0.32 0.32 0.9 1.45 (D/F) 0.25 0.25 0.25 0.9 0.32 0.32 0.32 0.32 0.32 0.9 0.25 0.25 0.25 1.45 (D/F)

Empty 0.32 0.32 0.32 Empty 1.45 (D/F) 0.25 0.25 0.25 1.45 (D/F) 0.9 0.9 0.9 1.45 (D/F) 0.25 0.25 0.25 0.25 0.25 1.45 (D/F) 0.25 0.25 0.25 0.25 0.25 0.25 Figure 2.3-11: MPC-89 Loading Pattern for MPCs Containing Undamaged and Damaged Fuel and/or Fuel Debris in DFCs, per Cell Heat Load Limits (All Storage cell heat loads are in kW, Undamaged Fuel or Damaged Fuel or Fuel Debris in a DFC may be stored in cells denoted by D/F. Cells denoted as Empty must remain empty regardless of the contents of the adjacent cell.)

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Design Features 3.0 Certificate of Compliance No. 1032 Amendment No. 5 Appendix B 3-5 TABLE 3-1 List of ASME Code Alternatives for Multi-Purpose Canisters (MPCs)

MPC basket supports and lift lugs NB-1130 NB-1132.2(d) requires that the first connecting weld of a non-pressure retaining structural attachment to a component shall be considered part of the component unless the weld is more than 2t from the pressure retaining portion of the component, where t is the nominal thickness of the pressure retaining material.

NB-1132.2(e) requires that the first connecting weld of a welded nonstructural attachment to a component shall conform to NB-4430 if the connecting weld is within 2t from the pressure retaining portion of the component.

The lugs that are used exclusively for lifting an empty MPC are welded to the inside of the pressure-retaining MPC shell, but are not designed in accordance with Subsection NB. The lug-to-Enclosure Vessel Weld is required to meet the stress limits of Reg. Guide 3.61 in lieu of Subsection NB of the Code.

MPC Enclosure Vessel NB-2000 Requires materials to be supplied by ASME-approved material supplier.

Materials will be supplied by Holtec approved suppliers with Certified Material Test Reports (CMTRs) in accordance with NB-2000 requirements.

MPC Enclosure Vessel NB-2121 Provides permitted material specification for pressure-retaining material, which must conform to Section II, Part D, Tables 2A and 2B Certain duplex stainless steels are not included in Section II, Part D, Tables 2A and 2B. UNS S31803 stainless steel alloy is evaluated in the HI-STORM FW FSAR and meet the required design criteria for use in the HI-STORM FW system per ASME Code Case N-635-1.

Appendix 1.A provides the required property data for the necessary safety analysis.

MPC Enclosure Vessel NB-3100 NF-3100 Provides requirements for determining design loading conditions, such as pressure, temperature, and mechanical loads.

These requirements are subsumed by the HI-STORM FW FSAR, serving as the Design Specification, which establishes the service conditions and load combinations for the storage system.

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ML18019A435

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