ML25062A251
| ML25062A251 | |
| Person / Time | |
|---|---|
| Site: | 07201032 |
| Issue date: | 02/28/2025 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML25062A248 | List: |
| References | |
| 5018123, EPID L-2024-LLA-0020 | |
| Download: ML25062A251 (1) | |
Text
SFSC Heat Removal System 3.1.2 Certificate of Compliance No. 1032 Proposed Amendment No. 610 Appendix A 3.1.2-2 ACTIONS (continued)
C. Required Action B.1 and associated Completion Time not met.
C.1 Measure SFSC dose rates in accordance with the Radiation Protection Program.
Immediately and once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter (Note 1)
AND C.2.1 Restore SFSC Heat Removal System to operable status.
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (Note 1)
OR C.2.2 Transfer the MPC into a TRANSFER CASK.
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (Note 1)
OR C.2.3 Perform an engineering evaluation to demonstrate through analysis, using the models and methods from the HI-STORM FW FSAR, that all components and contents remain below allowable temperature limits. (Note 1) 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (Note 1)
Note 1: For heat load patterns developed in accordance with Table 3-1, Note 6, alternate completion times shall be calculated in accordance with the methodology in FSAR Section 4.4 (or FSAR Section 4.II.1.3 for the EXTENDED CONFIGURATION OVERPACK). to Holtec Letter 5018123 NON-PROPRIETARY INFORMATION Page 1 of 9
SFSC Heat Removal System 3.1.2 Certificate of Compliance No. 1032 Proposed Amendment No. 610 Appendix A 3.1.2-3 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 <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> OR For OVERPACKS with installed temperature monitoring equipment, verify that the difference between the average OVERPACK air outlet temperature and ISFSI ambient temperature is:
7oF for OVERPACKS containing MPC-37s, 152oF for OVERPACKS containing BWR
- MPCs, 130 oF for OVERPACKS containing MPC-32MLs 116 oF for OVERPACKS containing MPC-37Ps 144 oF for OVERPACKS containing MPC-44s (Note 2) 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (Note 2)
Note 2: For heat load patterns developed in accordance with Table 3-1, Note 6, alternate completion times shall be calculated in accordance with the methodology in FSAR Section 4.4 (or FSAR Section 4.II.1.3 for the EXTENDED CONFIGURATION OVERPACK). Verify that the difference between the average OVERPACK air outlet temperature and ISFSI ambient temperature is less than or equal to the value computed using the methodology in FSAR Section 4.4 (or FSAR Section 4.II.4 for the EXTENDED CONFIGURATION OVERPACK). to Holtec Letter 5018123 NON-PROPRIETARY INFORMATION Page 2 of 9
TRANSFER CASK Heat Removal System 3.1.4 Certificate of Compliance No. 1032 Proposed Amendment No. 710 Appendix A 3.1.4-1 3.1 SFSC INTEGRITY 3.1.4 TRANSFER CASK Heat Removal System LCO 3.1.4 The HI-TRAC VW Version V or V2 Heat Removal System shall be operable
NOTE--------------------------------------------------
The HI-TRAC Version V or V2 Heat Removal System is operable when 100% of the inlet and outlet vent areas are unblocked and available for flow. If surveillance shows all be removed.
APPLICABILITY: This LCO is applicable when a loaded MPC is in the HI-TRAC VW Version V or V2 TRANSFER CASK AND completion of MPC drying operations in accordance with LCO 3.1.1.
ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. HI-TRAC VW Version V or V2 Heat Removal System inoperable.
A.1 Restore HI-TRAC VW Version V or V2 Heat Removal System to operable status 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> (Note 1)
B. Required Action A.1 and associated Completion Time not met B.1 Continue to restore HI-TRAC VW Version V or V2 Heat Removal System to operable status 64 hours7.407407e-4 days <br />0.0178 hours <br />1.058201e-4 weeks <br />2.4352e-5 months <br /> for Version V 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> for Version V2 (Note 1)
C. Required Action B.1 and associated Completion Time not met.
C.1 Provide supplemental cooling OR C.2 Remove MPC from HI-TRAC Immediately (Note 1)
Note 1: For heat load patterns developed in accordance with FSAR Section 4.4 (or FSAR Section 4.II.1.3 for the EXTENDED CONFIGURATION OVERPACK) alternate completion times shall be computed in accordance with the methodology in FSAR to Holtec Letter 5018123 NON-PROPRIETARY INFORMATION Page 3 of 9
TRANSFER CASK Heat Removal System 3.1.4 Certificate of Compliance No. 1032 Proposed Amendment No. 710 Appendix A 3.1.4-2 Section 4.6 (or FSAR Section 4.II.6 for the EXTENDED CONFIGURATION OVERPACK).
SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.1.4 Verify all HI-TRAC VW Version V or V2 inlets and outlets are free of blockage from debris.
Immediately and once every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> (Note 1)
Note 1: For heat load patterns developed in accordance with FSAR Section 4.4 (or FSAR Section 4.II.1.3 for the EXTENDED CONFIGURATION OVERPACK) alternate surveillance frequency times shall be computed in accordance with the methodology in FSAR Section 4.6 (or FSAR Section 4.II.6 for the EXTENDED CONFIGURATION OVERPACK). to Holtec Letter 5018123 NON-PROPRIETARY INFORMATION Page 4 of 9
3.4 Tables Certificate of Compliance No. 1032 Proposed Amendment No. 710 Appendix A 3.4-3 Fuel Burnup (MWD/MTU)
(Note 6)
Method of Moisture Removal (Notes 1 and 2)
MPC-89
-2A of Appendix B) 46.2 (Figures 2.3-10 and 2.3-11 of Appendix B) 46.14 (Figures 2.3-12 and 2.3-13 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.
- 6.
Alternative heat load limits may be developed following the methodology in the Section 4.4 of the HI-STORM FW FSARs (or Section 4.II.1.3 of the HI-STORM FW FSAR for the EXTENDED CONFIGURATION OVERPACK). For PWR MPCs these patterns must satisfy the requirements in Table 2.3-14 of Appendix B. For MPC-89 these patterns must satisfy the requirements in Table 2.3-15 of Appendix B. Dryness criteria are still as specified in Notes 1 or 2 as applicable to the selected drying process and Note 3 still applies to vacuum drying. to Holtec Letter 5018123 NON-PROPRIETARY INFORMATION Page 5 of 9
3.4 Tables Certificate of Compliance No. 1032 Proposed Amendment No. 710 Appendix A 3.4-4 Table 3-2.
MPC Helium Backfill Limits1,2 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 Table 2.3-1B Table 2.3-1A, Pattern A Table 2.3-1A, Pattern B Figure 2.3-1 Figure 2.3-2 Figure 2.3-3 Figure 2.3-4 Figure 2.3-5 Figure 2.3-6 Figure 2.3-7 Figure 2.3-8 Figure 2.3-9 Table 2.3-9A Table 2.3-9B MPC-89 Table 2.3-2B Table 2.3-4 Table 2.3-2A Figure 2.3-10 Figure 2.3-11 Figure 2.3-12 Figure 2.3-13 Table 2.3-10A Table 2.3-10B MPC-32ML Table 2.3-5, All Patterns MPC-37P Table 2.3-1A, Pattern A Table 2.3-1A, Pattern B Table 2.3-7A Table 2.3-7B MPC-44 Table 2.3-8A Table 2.3-8B Table 2.3-8C Table 2.3-13 1.0 4.0 1
range is at a reference temperature of 70oF 12 For heat load patterns developed in accordance with Table 3-1, Note 6, helium back fill limits shall be calculated in accordance with FSAR Section 4.4 (or FSAR Section 4.II.4 for the EXTENDED CONFIGURATION OVERPACK). to Holtec Letter 5018123 NON-PROPRIETARY INFORMATION Page 6 of 9
Approved Contents 2.0 Certificate of Compliance No.1032 Proposed Amendment No. 107 Appendix B 2-30 for MPC-44. The per cell limits in these tables apply to cells containing undamaged fuel or damaged fuel in DFCs/DFIs or fuel debris in DFCs.
contents to allow one slightly thermally-discrepant fuel assembly per quadrant to be loaded as long as the peak cladding temperature for the MPC remains below the ISG-11 Rev 3 requirements is permitted for essential dry storage campaigns to support decommissioning.
2.3.3 Variable Fuel Height for MPC-37 and MPC-44 2.3.3.1 For fuel with a longer active fuel length than the reference fuel (144 inches), the maximum total heat load, maximum quadrant heat load limits and specific heat load limits in each cell, may be increased by the ratio SQRT(L/144), where L is the active length of the fuel in inches.
2.3.3.2 For fuel with a shorter active fuel length than the reference fuel (144 inches), the maximum total heat load, maximum quadrant heat load limits and specific heat load limits in each cell, shall be reduced linearly by the ratio L/144, where L is the active fuel length of the fuel in inches.
2.3.4 Variable Fuel Height for MPC-89 2.3.4.1 For fuel with a longer active fuel length than the reference fuel (150 inches), the maximum total heat load, maximum quadrant heat load limits and specific heat load limits in each cell, may be increased by the ratio SQRT(L/150), where L is the active length of the fuel in inches.
2.3.4.2 For fuel with a shorter active fuel length than the reference fuel (150 inches), the total heat load, quadrant heat load limits and specific heat load limits in each cell, shall be reduced linearly by the ratio L/150, where L is the active fuel length of the fuel in inches.
2.3.5 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.
2.3.6 Fuel Loading Decay Heat Limits for EXTENDED CONFIGURATION OVERPACK (NOTE 1)
The decay heat limits discussed in subsection 2.3.1 for VENTILATED OVERPACK apply to the EXTENDED CONFIGURATION OVERPACK.
However, there are restrictions on the use of the MPC-37P and the MPC-44.
The MPC-37P is not certified for use within the EXTENDED CONFIGURATION OVERPACK. MPC-44 allowable decay heat limits within the EXTENDED CONFIGURATION OVERPACK can be found below in Table to Holtec Letter 5018123 NON-PROPRIETARY INFORMATION Page 7 of 9
Approved Contents 2.0 Certificate of Compliance No.1032 Proposed Amendment No. 107 Appendix B 2-31 2.3-.8C.
Note 1: Alternative heat load limits may be developed following the methodology in Section 4.4 of the HI-STORM FW FSAR (or Section 4.II.1.3 of the HI-STORM FW FSAR for the EXTENDED CONFIGURATION OVERPACK). For PWR MPCs these patterns must satisfy the requirements in Table 2.3-14. For MPC-89 these patterns must satisfy the requirements in Table 2.3-15. to Holtec Letter 5018123 NON-PROPRIETARY INFORMATION Page 8 of 9
Approved Contents 2.0 Certificate of Compliance No.1032 Proposed Amendment No. 107 Appendix B 2-41 Table 2.3-14 MAX. ALLOWABLE HEAT LOADS FOR PWR MPCs1,2 MPC Type Max. Allowable Total MPC Heat Load, kW Max. Allowable Heat Load per Storage Location, kW MPC-32ML 59.0 5.0 MPC-37 59.0 5.0 MPC-37P 59.0 5.0 MPC-44 59.0 5.0 Table 2.3-15 MAX. ALLOWABLE HEAT LOAD FOR THE MPC-891,2 MPC Type Max. Allowable Total MPC Heat Load, kW Max. Allowable Heat Load per Storage Location, kW MPC-89 60.8
2.7 Notes
1.)
Table 2.3-14 and Table 2.3-15 are the maximum allowable heat loads for alternative heat loads patterns developed following the methodology in Section 4.4 of the HI-STORM FW FSAR (or Section 4.II.1.3 of the HI-STORM FW FSAR for the EXTENDED CONFIGURATION OVERPACK).The maximum allowable heat loads per storage cell for MPC-37 and MPC-44 are based on the active length of the standard-length fuel (Table 2.3-6). The maximum allowable heat loads per storage cell for MPC-89 are based on the active length of the standard-length fuel defined in Section 2.3.4. Maximum allowable heat load per storage location for fuels with shorter or longer active fuels than the standard active fuel length should be determined using the methodology in HI-STORM FW FSAR Chapter 4.
2.)
MPCs with maximum allowable heat load limits in accordance with Table 2.3-14 and Table 2.3-15 can only be used in OVERPACKs described in HI-STORM FW FSAR Table 1.2.9. to Holtec Letter 5018123 NON-PROPRIETARY INFORMATION Page 9 of 9