ML20128J298
| ML20128J298 | |
| Person / Time | |
|---|---|
| Site: | Holtec, Consolidated Interim Storage Facility |
| Issue date: | 04/28/2020 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML20128J292 | List: |
| References | |
| 5014896 | |
| Download: ML20128J298 (2) | |
Text
Approved Contents 2.0 Certificate of Compliance No. 1014 Amendment No. 15 Appendix D 2-11 Table 2.1-4 BURNUP AND COOLING TIME FUEL QUALIFICATION FOR MPC-32M Cell Decay Heat Load Limit (kW)
Polynomial Coefficients, see Paragraph 2.II.1.5.2 A
B C
D 0.83 6.57083E-14
-4.02593E-09 1.47107E-04 8.01647E-01 0.83 < decay heat 1.25 4.11020E-14
-4.62813E-09 2.17444E-04
-5.55545E-01 1.25 < decay heat 1.46 1.21147E-14
-1.08013E-09 8.66361E-05 4.04455E-01 1.46 < decay heat 3.26 3.76103E-16 4.83486E-11 1.74805E-05 6.53455E-01 The burnup and cooling time for every fuel loaded into the MPC-32M must satisfy the following equation:
= 3 + 2 + +
- where, Ct = Minimum cooling time (years),
Bu = Assembly-average burnup (MWd/mtU),
A, B, C, D = Polynomial coefficients listed in Table 2.1-4 Notes:
- 1) Decay heat per fuel assembly is presented
- 2) A decay heat value that is equal to or greater than the appropriate decay heat load limit 5014896 Attachment 5
Design Features 3.0 Certificate of Compliance No. 1014 Amendment No. 15 Appendix D 3-4 Table 3-1 List of ASME Code Alternatives for HI-STORM Multi-Purpose Canisters (MPCs)
MPC 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 duplex stainless-steel alloy is evaluated in the HI-STORM FW FSAR and meet the required design criteria for use in the HI-STORM 100 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 not applicable. The HI-STORM FSAR, serving as the Design Specification, establishes the service conditions and load combinations for the storage system.
MPC Enclosure Vessel NB-4120 NB-4121.2 and NF-4121.2 provide requirements for repetition of tensile or impact tests for material subjected to heat treatment during fabrication or installation.
In-shop operations of short duration that apply heat to a component, such as plasma cutting of plate stock, welding, machining, and coating are not, unless explicitly stated by the Code, defined as heat treatment operations.
5014896 Attachment 5