ML18331A047
| ML18331A047 | |
| Person / Time | |
|---|---|
| Site: | Holtec |
| Issue date: | 10/31/2018 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| References | |
| 5014855, CoC 1014 | |
| Download: ML18331A047 (4) | |
Text
Definitions 1.1 Certificate of Compliance No. 1014 Amendment No. 14 Appendix A 2
1.1 Definitions (continued)
DAMAGED FUEL CONTAINER (DFC)
DFCs are specially designed enclosures for DAMAGED FUEL ASSEMBLIES or FUEL DEBRIS which permit gaseous and liquid media to escape while minimizing dispersal of gross particulates.
DFCs authorized for use in the HI-STORM 100 System are as follows:
- 1. Holtec Dresden Unit 1/Humboldt Bay design
- 2. Transnuclear Dresden Unit 1 design
- 3. Holtec Generic BWR design
FUEL DEBRIS DFIs are specially designed barriers installed at the top and bottom of the storage cell space which permit flow of gaseous and liquid media while preventing the potential migration of fissile material from fuel assemblies with cladding damage. DFIs are used ONLY with damaged fuel assemblies which can be handled by normal means and whose structural integrity is such that geometric rearrangement of fuel is not expected. Damaged fuel stored in DFIs may contain missing or partial fuel rods and/or fuel rods with known or suspected cladding defects greater than hairline cracks or pinhole leaks.
FUEL DEBRIS is ruptured fuel rods, severed rods, loose fuel pellets, containers or structures that are supporting these loose fuel assembly parts, or fuel assemblies with known or suspected defects which cannot be handled by normal means due to fuel cladding damage.
FUEL BUILDING The FUEL BUILDING is the site-specific power plant facility, governed by the regulations of 10 CFR Part 50, where the loaded OVERPACK or TRANSFER CASK is transferred to or from the transporter.
(continued) 5014855 Attachment 3
MPC Cavity Drying Limits Table 3-1 Certificate of Compliance No. 1014 Amendment No. 14 Appendix A 3.4-1 Table 3-1 MPC Cavity Drying Limits for all MPC Types Fuel Burnup (MWD/MTU)
MPC Heat Load (kW)
Method of Moisture Removal (Notes 1, 2, and 3)
All Assemblies < 45,000 26 (MPC-24/24E/24EF, MPC-32/32F, MPC-68/68F/68FF)
VDSNote 5 or FHDNote 6 36.9 (MPC-68M)Note 6 VDS or FHD 42.8 (MPC-68M)Note 7 VDS or FHD All Assemblies < 45,000
< 36.9 (MPC-24/24E/24EF, MPC-32/32F, MPC-68/68F/68FF)Note 6 VDSNote 8 or FHD One or more assemblies
> 45,000 29 (MPC-68M)
VDSNote 4 One or more assemblies
> 45,000 36.9 (MPC-24/24E/24EF/MPC-32/32F/MPC-68/68F/68FF)Note 6 VDSNote 8 or FHD 36.9 (MPC-68M)Note 6 VDSNote 8 or FHD 42.8 (MPC-68M)Note 7 VDSNote 8 or FHD Notes:
- 1.
VDS means a vacuum drying system. The acceptance criterion when using a VDS is MPC cavity pressure shall be < 3 torr for > 30 minutes.
- 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 system must be performed with the annular gap between the MPC and the TRANSFER CASK filled with water.
- 4.
The maximum allowable decay heat per fuel storage location is 0.426 kW.
- 5.
Maximum allowable storage cell heat load is 1.083 kW (MPC-24/24E/24EF), 0.812 kW (MPC-32/32F) and 0.382 kW (MPC-68/68F/68FF).
- 6.
Maximum per assembly allowable heat loads under uniform or regionalized storage defined in Appendix B, Section 2.4.1 or 2.4.2.
- 7.
Maximum per assembly allowable heat loads defined in Appendix B Figures 2.4-1 through 2.4-4.
5014855 Attachment 3
MPC Helium Backfill Limits Table 3-2 Certificate of Compliance No. 1014 Amendment No. 14 Appendix A 3.4-2 MPC-68M
- i. Cask Heat Load 28.19 kW -
uniformly distributed per Table 3-4 or regionalized loading per Table 3-3 0.1218 +/-10% g-moles/l OR 29.3 psig and 48.5 psig ii. Cask Heat Load > 28.19 kW -
uniformly distributed or greater than regionalized heat load limits per Table 3-3 45.5 psig and 48.5 psig iii. Cask Heat Load 42.8 kW QSHL Loading Pattern shown in Appendix B, Figure 2.4-1 QSHL patterns shown in Appendix B, Figures 2.4-2 through 2.4-4 43.5 psig and 46.5 psig 45.5 psig and 48.5 psig 5014855 Attachment 3
MPC Heat Load Limits Table 3-3 Certificate of Compliance No. 1014 Amendment No. 14 Appendix A 3.4-4 Table 3-5: Completion Time for Actions to Restore SFSC Heat Removal System Operable MPC Material MPC Type Decay Heat Limits per Storage Location Condition B Completion Time Condition C Completion Time Surveillance Frequency Alloy X Except Duplex1 MPC-24/24E/24EF Appendix B, Section 2.4 8 hrs 24 hrs 24 hrs MPC-32/32F MPC-68/68F/68FF/68M MPC-68M Appendix B, Figures 2.4-1 through 2.4-4 Alloy X MPC-24/24E/24EF Appendix B, Section 2.4 8 hrs 16 hrs 16 hrs MPC-32/32F MPC-68/68F/68FF/68M Alloy X MPC-68M Appendix B, Figures 2.4-1 through 2.4-4 4 hrs 12 hrs 12 hrs Alloy X Except Duplex1 MPC-24 Appendix A, Table 3-3 (Regionalized)
OR Appendix A, Table 3-4 (Uniform) 8 hrs 64 hrs 24 hrs MPC-24E/EF MPC-32/32F MPC-68/68F/68FF/68M Alloy X MPC-24 Appendix A, Table 3-3 (Regionalized)
OR Appendix A, Table 3-4 (Uniform) 8 hrs 24 hrs 24 hrs MPC-24E/EF MPC-32/32F MPC-68/68F/68FF/68M Alloy X MPC-24/24E/24EF 0.75 kW 24 hrs 64 hrs 30 days MPC-32/32F 0.5 kW MPC-68/68F/68FF/68M 0.264 kW Note
- 1) If any component of the MPC is made of duplex, these completion times are not applicable.
5014855 Attachment 3