ML18191B012
| ML18191B012 | |
| Person / Time | |
|---|---|
| Site: | 07100784, Consolidated Interim Storage Facility |
| Issue date: | 03/24/2017 |
| From: | Varma N Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML18191B009 | List: |
| References | |
| 5025029 HI-2177553, Rev. 2 | |
| Download: ML18191B012 (71) | |
Text
COMPANY PRIVATE This document is proprietary and the property of Holtec International. It is to be used only in connection with the performance of work by Holtec International or its designated subcontractors or Holtec's Client.
Reproduction, publication or representation, in whole or in part, for any other purpose by any other party other than the Client or its designated contractors, that are bound by a corporate or individual non-disclosure and non-use agreement with the Client, is expressly forbidden.
2177553 Holtec Report No:
Holtec Project No:
5025 HI-5025 GENERIC FOR Report Class : SAFETY RELATED NPD Sponsoring Holtec Division:
THERMAL ANALYSIS OF HI-TRAC CS TRANSFER CASK H O L T E C Holtec Center, One Holtec Drive, Marlton, NJ 08053 Telephone (856) 797- 0900 Fax (856) 797 - 0909 I N T E R N A T I O N A L ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 1 of 71
HOLTEC INTERNATIONAL DOCUMENT ISSUANCE AND REVISION STATUS1 DOCUMENT NAME:
DOCUMENT NO.:
PROJECT NO.:
CATEGORY:
GENERIC PROJECT SPECIFIC Rev.
No. 2 Date Approved Authors Initials VIR #
DOCUMENT CATEGORIZATION In accordance with the Holtec Quality Assurance Manual and associated Holtec Quality Procedures (HQPs), this document is categorized as a:
Calculation Package3 (Per HQP 3.2)
Technical Report (Per HQP 3.2)
(Such as a Licensing Report)
Design Criterion Document (Per HQP 3.4)
Design Specification (Per HQP 3.4)
Other (Specify):
DOCUMENT FORMATTING The formatting of the contents of this document is in accordance with the instructions of HQP 3.2 or 3.4 except as noted below:
DECLARATION OF PROPRIETARY STATUS Nonproprietary Holtec Proprietary Privileged Intellectual Property (PIP)
Notes ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 2 of 71 THERMAL ANALYSIS OF HI-TRAC CS TRANSFER CASK HI-2177553 5025 0
3/24/2017 935089 N.Varma
- 1. This document has been subjected to review, verification and approval process set forth in the Holtec Quality Assurance Procedures Manual. Password controlled signatures of Holtec personnel who participated in the preparation, review, and QA validation of this document are saved on the company"s network. The Validation Identifier Record (VIR) number is a random number that is generated by the computer after the specific revision of this document has undergone the required review and approval process, and the appropriate Holtec personnel have recorded their password-controlled electronic concurrence to the document.
- 2. A revision to this document will be ordered by the Project Manager and carried out if any of its contents including revisions to references is materially affected during evolution of this project. The determination as to the need for revision will be made by the Project Manager with input from others, as deemed necessary by him.
- 3. Revisions to this document may be made by adding supplements to the document and replacing the "Table of Contents", this page and the "Revision Log".
Holtec Report HI-2177553 i
Holtec Project 5025 PREFACE This section contains quality related information on this document in conformance with the provisions in Holtecs Quality Assurance program docketed with the USNRC (Docket # 71-0784).
This document is classified as Safety Significant under Holtec Internationals quality assurance system.
In order to gain acceptance as a safety significant document in the companys quality assurance system, this document is required to undergo a prescribed review and concurrence process that requires the preparer and reviewer(s) of the document to answer a long list of questions crafted to ensure that the document is purged of all errors of any material significance. A record of the review and verification activities is maintained in electronic form within the companys network to enable future retrieval and recapitulation of the programmatic acceptance process leading to the acceptance and release of this document under the companys QA system. Among the numerous requirements that this document must fulfill, as applicable, to muster approval within the companys QA program are:
- The preparer(s) and reviewer(s) are technically qualified to perform their activities per the applicable Holtec Quality Procedure (HQP).
- The input information utilized in the work effort is drawn from referenceable sources. Any assumed input data is so identified.
- Significant assumptions are stated or provided by reference to another source.
- The analysis methodology is suitable for the physics of the problem.
- Any computer code and its specific versions used in the work are formally admitted for use within the companys QA system.
- The content of the document is in accordance with the applicable Holtec quality procedure.
- The material content of the calculation package is understandable to a reader with the requisite academic training and experience in the underlying technical disciplines.
Once a safety significant document, such as this calculation package, completes its review and certification cycle, it should be free of any materially significant error and should not require a revision unless its scope of treatment needs to be altered. Except for regulatory interface documents (i.e., those that are submitted to the regulator in support of a license amendment and request), editorial revisions to Holtec safety significant documents are not made unless such editorial changes are deemed necessary by the Holtec Project ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 3 of 71
Holtec Report HI-2177553 ii Holtec Project 5025 Manager to prevent erroneous conclusions from being inferred by the reader. In other words, the focus in the preparation of this document is to ensure correctness of the technical content rather than the cosmetics of presentation.
Furthermore, this Calculation Package is focused on providing technical results that demonstrate compliance with the applicable safety limits. Informational material that does not bear upon reaching a safety conclusion is minimized in this document to the extent possible. Because of its function as a repository of all analyses performed on the subject of its scope, this document will require a revision only if an error is discovered in the computations or the equipment design is modified. Additional analyses in the future may be added as numbered supplements to this Package. Each time a supplement is added or the existing material is revised, the revision status of this Package is advanced to the next number and the Table of Contents is amended. Calculation Packages are Holtec proprietary documents. They are shared with a client only under strict controls on their use and dissemination. This Calculation Package will be saved as a Permanent Record under the companys QA System.
Generic Reports Holtec International maintains a number of so-called generic reports which provide the methodology, computer models and associated modeling assumptions for a specific physical problem. The technical content of a generic report is fully aligned with the System FSAR, Reg. Guides, NUREGs, etc., as applicable. In other words, the generic report contains Holtecs standardized analysis approach, method and model to analyze a technical problem. Developed under Holtecs self-funded R&D program, the generic reports are treated as vital intellectual property of the Company and are accordingly prohibited from dissemination to any external entity. The generic reports are subject to inspection by the NRCs staff at Holtecs corporate headquarters during NRCs triennial inspection of Holtec. The Calculation Package can invoke a Generic Report in whole or in part (see table below) to improve conciseness and to enable it to be submitted un-redacted to the Companys clients.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 4 of 71
Holtec Report HI-2177553 iii Holtec Project 5025 Holtec Approved Computer Program List (ACPL)
Holtec International maintains an active list of QA validated computer codes on the Companys network that are approved for use in Safety significant projects. The table below identifies the Codes and applicable versions (listed in the ACPL) that have been used in this work effort.
Generic Report & ACPL Information Generic Report # invoked in this Calc Package, if applicable N/A Code(s) name(s) (must be listed in the ACPL)
Fluent Code(s) version # (must be approved in the ACPL) 14.5.7
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
Quality Validation Questionnaire The questionnaire below is a distilled version of the vast number of questions that the preparer and reviewer of a Holtec safety-significant report must answer and archive in the Companys network to gain a VIR number (the identifier of QA pedigree in Holtecs electronic configuration control system).
An affirmative answer (unless the question is not applicable or NA) to each of the following questions by the preparer of the report (or editor of a multi-author document) is an essential condition for this document to merit receiving a QA validated status.
Criterion
Response
Yes or No 1
Are you qualified per HQP 1.0 to perform the analysis documented in this report?
Yes 2
Are you aware that you must be specifically certified if you use any Category A computer code (as defined in HQP 2.8 in the preparation of this document?
Yes 3
Are you fully conversant with the pertinent sections of the Yes ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 5 of 71
Holtec Report HI-2177553 iv Holtec Project 5025 applicable Specification invoked in this report?
4 Is the input data used in this work fully sourced (i.e.,
references are provided)?
Yes 5
Are you fully conversant with the user manual and validation manual of the code(s) used in this report, if any?
Yes 6
Is (Are) Category A computer code(s) (if used) listed in the Companys Approved Computer program list?
Yes 7
Are the results clearly set down and do they meet the acceptance criteria set down in the governing Specification?
Yes 8
Are you aware that you must observe all internal requirements on needed margins of safety published in Holtecs internal memos, if applicable (which may exceed those in the reference codes and standards or the specification)?
Yes 9
Have you performed numerical convergence checks to ensure that the solution is fully converged?
Yes 10 Is it true that you did not receive more than 10 quality infraction points in the past calendar year or thus far this year?
Yes ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 6 of 71
Holtec Report HI-2177553 v
Holtec Project 5025 TABLE OF CONTENTS
1.0 INTRODUCTION
............................................................................................................................... 1 2.0 METHODOLOGY AND ASSUMPTIONS........................................................................................ 4 3.0 ACCEPTANCE CRITERIA................................................................................................................ 5 4.0 INPUT DATA...................................................................................................................................... 6 5.0 COMPUTER CODES AND FILES.................................................................................................... 7 6.0 CALCULATION AND RESULTS..................................................................................................... 8
7.0 REFERENCES
.................................................................................................................................... 9 Appendix A: Thermal Analysis of HI-TRAC CS During Normal Onsite Transfer Appendix B: Thermal Analysis of HI-TRAC CS During Hypothetical Accident Scenarios Appendix C: Calculation of Liquid Phase Fire Duration Appendix D: Calculation of Heat Flux from Utility Vehicle Tire Fire
SUMMARY
OF REVISIONS Revision 0:
Initial Issue ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 7 of 71
Holtec Report HI-2177553 1
Holtec Project 5025
1.0 INTRODUCTION
The HI-TRAC CS is the transfer cask to carry out all the onsite transfer operations of the MPC (Multi-Purpose Canister) at the HI-STORE CIS facility [1]. The HI-TRAC CS is a variation of HI-TRAC VW transfer cask licensed in docket number 72-1032 for the HI-STORM FW system and later adopted for the HI-STORM UMAX system in docket number 72-1040. HI-TRAC CS utilizes steel and densified concrete to provide dose attenuation [2]. HI-TRAC CS is also characterized by a split bottom lid (shield gate) configuration with each half designed to retract (open)/approach (close) symmetrically. The key thermal design feature of the HI-TRAC CS is the inlet vents provided in the shield gates that allow air to enter the HI-TRAC-to-MPC annular space. This allows for enhanced dissipation of decay heat from the MPC during transfer operations through natural convection.
The major onsite transfer operations involving HI-TRAC CS are as follows [1]:
[PROPRIETARY PER 10CFR2.390
].
The purpose of this report is to evaluate and document the thermal performance of the HI-TRAC CS cask during the onsite transfer operations at the HI-STORE CIS facility and the associated hypothetical accident scenarios. Thermal analyses are carried out using three-dimensional models constructed using ANSYS FLUENT [8]. The HI-TRAC CS thermal evaluation adopts NUREG-1536 [6] and ISG-11 guidelines [7] to demonstrate the safe transfer of Commercial Spent Fuel (CSF). These guidelines are stated below:
- 1. The fuel cladding temperature for short-term operations shall be limited to 400°C (752°F) for high burnup fuel and 570°C (1058°F) for moderate burnup fuel.
- 2. The fuel cladding temperature should be maintained below 570°C (1058°F) for off-normal and accident conditions.
- 3. The internal pressure of the MPC should remain within its design pressures for normal, off-normal, and accident conditions.
- 4. The component materials should be maintained within their minimum and maximum temperature criteria under normal, off-normal, and accident conditions.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 8 of 71
Holtec Report HI-2177553 2
Holtec Project 5025 This calculation package serves as the thermal design justification for the HI-TRAC CS system loaded with MPC-37 and MPC-89 canisters under normal and accident conditions to support the HI-STORE CIS Licensing Report [1].
1.1 MPC Decay Heat As discussed in Section A.1 of Appendix A, the MPC-37 canister with [PROPRIETARY PER 10CFR2.390] (as defined in HI-STORM FW FSAR [3]) is the most limiting for casks in vertical orientation and is hence adopted for thermal analyses of HI-TRAC CS at HI-STORE site.
The HI-TRAC CS is analyzed for the bounding heat load pattern (Pattern 1) from Table 4.1.1 of HI-STORE CIS SAR [1]. As demonstrated in Table 3.3.4 of [5], this pattern is limiting for both the peak cladding temperature and MPC internal pressure and is hence adopted for all thermal evaluations of HI-TRAC CS documented herein.
1.2 Helium Backfill Pressure The MPC is pressurized with Helium before transportation to the HI-STORE CIS site in a HI-STAR 190 transport cask to provide an inert atmosphere and to enhance heat transfer. The backfill pressure range for MPC-37s transferred at the HI-STORE site is specified in Table 4.1.3 of HI-STORE CIS SAR [1] and duplicated in Table 1.2 of this report.
1.3 Design Ambient Conditions The HI-TRAC CS thermal evaluations are performed for site specific ambient conditions defined in Chapter 2 of the HI-STORE Site Specific Licensing Report [1]. The ambient conditions used for the normal onsite transfer scenario are listed in Table 1.1.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 9 of 71
Holtec Report HI-2177553 3
Holtec Project 5025 Table 1.1: Site Specific Parameters Applicable to Thermal Analyses of HI-TRAC CS Parameter Value Ambient Temperature for Short Term Operations 91oF Site Elevation
[PROPRIETARY PER 10CFR2.390]
Note 1: Elevation above sea level adopted for thermal evaluations conservatively bounds the site maximum elevation of [PROPRIETARY PER 10CFR2.390] [1].
Table 1.2 Helium Backfill Range for MPCs Stored at HI-STORE CIS Site (Reproduced from [1])
MPC Type Pressure Range (Note 1)
MPC-37
> 39.0 psig and < 46.0 psig Note 1: Helium used for backfill of MPC shall have a purity of > 99.995%. The pressure range is based on a reference temperature of 70oF.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 10 of 71
Holtec Report HI-2177553 4
Holtec Project 5025 2.0 METHODOLOGY AND ASSUMPTIONS The overall thermal analysis principles and methodology adopted here is based on the HI-STORM FW FSAR [3] and the HI-STORM UMAX FSAR [4]. The detailed methodology and assumptions used for the evaluations are discussed in the respective appendices.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 11 of 71
Holtec Report HI-2177553 5
Holtec Project 5025 3.0 ACCEPTANCE CRITERIA The acceptance criteria applicable for the various scenarios during the onsite transfer for MPC in the HI-TRAC CS is outlined in the corresponding Appendices.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 12 of 71
Holtec Report HI-2177553 6
Holtec Project 5025 4.0 INPUT DATA The input data necessary for the thermal analysis of normal onsite transfer scenario is listed in Section A.4 and the input information used for the accident condition analyses are listed in Section B.4.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 13 of 71
Holtec Report HI-2177553 7
Holtec Project 5025 5.0 COMPUTER CODES AND FILES All thermal calculations documented in this report are performed using FLUENT Version 14.5 code [8].
The input/output files used in the HI-TRAC CS analyses are presented in the individual appendices.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 14 of 71
Holtec Report HI-2177553 8
Holtec Project 5025 6.0 CALCULATION AND RESULTS All the normal onsite transfer and accident conditions are evaluated and presented in the appendices of this report. The predicted results demonstrate that the peak fuel temperature, HI-TRAC and MPC component temperatures, and MPC internal pressure during normal onsite transfer scenario are in compliance with the acceptance criteria listed in HI-STORE CIS SAR [1].
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 15 of 71
Holtec Report HI-2177553 9
Holtec Project 5025
7.0 REFERENCES
[1]
Licensing Report on the HI-STORE CIS Facility Holtec Report HI-2167374, Revision 0.
[2]
HI-TRAC CS Licensing Drawing, Holtec Drawing 10868, Revision 0.
[3]
Final Safety Analysis Report on the HI-STORM FW MPC Storage System, Holtec Report HI-2114830 Revision 4.
[4]
Final Safety Analysis Report on the HI-STORM UMAX Storage System, Holtec Report HI-2115090, Revision 3.
[5]
Safety Analysis Report on the HI-STAR 190 Package, Holtec Report HI-2146214, Revision 0.D.
[6]
NUREG-1536, Standard Review Plan for Dry Cask Storage Systems, USNRC, Revision 1 (July 2010).
[7]
Cladding Considerations for the Transportation and Storage of Spent Fuel, Interim Staff Guidance
- 11, Revision 3, 2003.
[8]
Fluent 14.5, ANSYS Theory Guide 117 (2012).
[9]
MPC-37 Enclosure Vessel, Holtec Drawing 6505, Revision 17.
[10] Assembly, MPC 37 Fuel Basket, Holtec Drawing 6506, Revision 12.
[11] Effective Thermal Properties of PWR Fuel to Support Thermal Evaluation of HI-STORM FW, Holtec Report HI-2094356, Revision 5.
[12] HI-STORM FW License Amendment Request, 1032-5.
[13] Thermal Evaluations of HI-STORM UMAX at HISTORE CIS Facility, HI-2177591 Revision 0.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 16 of 71
Holtec Report HI-2177553 A-1 Holtec Project 5025 Appendix A:
Thermal Analysis of HI-TRAC CS During Normal Onsite Transfer ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 17 of 71
Holtec Report HI-2177553 A-2 Holtec Project 5025 A.1 INTRODUCTION The thermal analysis of the HI-TRAC CS during normal onsite transfer is presented in this Appendix. One of the central objectives of this report is to establish that the MPCs transported to the storage site in the HI-STAR 190 casks can be safely transferred to the UMAX storage systems using the HI-TRAC CS. The HI-TRAC CS is analyzed under a bounding configuration during the onsite transfer of MPC from the HI-STAR 190 cask to the VVM for storage. The bounding scenarios for onsite transfer are established based on the configurations evaluated in the HI-STAR 190 SAR [5] and the HI-STORM UMAX FSAR [4].
The bounding configuration includes the following:
- 1. Limiting MPC Type and Heat Load Pattern: As discussed in Section 2.0 of UMAX storage report [13], MPC-37 loaded with the PWR short fuel under the heat load pattern 1 from Table 4.1.1 of HI-STORE CIS SAR [1] is the most limiting thermal configuration.
Therefore, this bounding configuration is adopted for all analyses presented in this report.
- 2. [PROPRIETARY PER 10CFR2.390
].
- 3. Solar insolation: The HI-TRAC is assumed to be outdoors and subjected to 10CFR71 solar insolation levels. 24-hour averaged insolation is applied considering the high thermal inertia of the system.
A 3-D thermal model is developed for the above configuration using the ANSYS Fluent [8]
as described in the following sections. Although the onsite transfer would preclude the HI-TRAC CS/MPC reaching steady state due to the high thermal inertia of the system, a steady state analysis of HI-TRAC CS, with MPC in vertical orientation, during onsite transfer is performed here.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 18 of 71
Holtec Report HI-2177553 A-3 Holtec Project 5025 A.2 METHODOLOGY To ensure an adequate representation of the thermally significant features of the HI-TRAC CS package such as air flow, fuel basket, basket shims, MPC and the various components of the cask, three-dimensional computational fluid dynamics (CFD) models of the MPC-37 loaded with the PWR Short Fuel (discussed in Section A.1) placed in the HI-TRAC CS cask are constructed.
The MPC-37 model is adopted from the HI-STORM FW LAR [12]. The HI-TRAC CS cask is modelled around the existing MPC-37 model. The overall modelling approach and solution methodology used here is largely adopted from the thermal evaluations presented in the HI-STORM FW FSAR [3] and HI-STORM UMAX FSAR [4].
These HI-TRAC CS/MPC-37 3-D models have the following key features:
[PROPRIETARY PER 10CFR2.390 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 19 of 71
Holtec Report HI-2177553 A-4 Holtec Project 5025
].
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 20 of 71
Holtec Report HI-2177553 A-5 Holtec Project 5025 A.3 ASSUMPTIONS The HI-TRAC CS thermal analysis employs an array of conservatisms to predict the maximum fuel, basket, MPC, and cask component temperatures. Following is a list of key features and conservative assumptions made in the thermal analysis of HI-TRAC CS during normal onsite transfer:
- 1. Axial heat transfer through fuel pellets is neglected in accordance with NUREG 1536.
- 2. [PROPRIETARY PER 10CFR2.390
].
- 3. [PROPRIETARY PER 10CFR2.390].
- 4. [PROPRIETARY PER 10CFR2.390
].
- 5. [PROPRIETARY PER 10CFR2.390
].
- 6. [PROPRIETARY PER 10CFR2.390
].
- 7. [PROPRIETARY PER 10CFR2.390 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 21 of 71
Holtec Report HI-2177553 A-6 Holtec Project 5025
].
- 8. [PROPRIETARY PER 10CFR2.390
].
- 9. [PROPRIETARY PER 10CFR2.390
].
- 10. The effective thermal conductivities of fuel assemblies are conservatively reduced by 10%
from the calculated value reported in Reference [11].
- 11. The HI-TRAC CS air inlet opening is conservatively understated reducing the inlet area for air flow.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 22 of 71
Holtec Report HI-2177553 A-7 Holtec Project 5025 A.4 INPUT DATA The principal geometric input data for the thermal-hydraulic evaluations of the HI-TRAC CS cask, used in these analyses, are taken from design drawing [2]. The geometric data for the MPC-37 with the PWR short fuel is adopted from the HI-STOR FW FSAR [3].
Materials present in the HI-TRAC CS cask include structural steels, and concrete. The physical properties of these materials are adopted from [4]. The properties of the MPC-37 component materials are adopted from HI-STORM FW FSAR [3].
[PROPRIETARY PER 10CFR2.390
].
As outlined in Section A1.1, the heat load Pattern 1 from HI-STORE SAR [2] is used for the analyses presented here.
The natural convection surface heat transfer coefficient on the cask external surface, used in the quarter-symmetric models, is based on the correlations provided in Chapter 4 of HI-STORM FW FSAR [3]. Conservatively understated convection coefficient (h) is used in the thermal model.
Solar insolation, that bounds the 10CFR71 prescribed insolation data (see Table A.2.1), have been applied to all external surfaces of the HI-TRAC CS cask. [PROPRIETARY PER 10CFR2.390].
The site specific ambient temperature is listed in Table 1.1.
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Holtec Report HI-2177553 A-8 Holtec Project 5025 A.5 ACCEPTANCE CRITERIA The HI-TRAC CS thermal evaluation acceptance criteria are listed below:
- 1. The peak cladding temperature under normal onsite transfer must be below 400oC for MPCs containing one or more high burnup fuel assemblies and 570oC for MPCs containing all moderate burnup fuel assemblies [7].
- 2. The HI-TRAC CS steel and concrete temperatures must be within the temperature limits presented in Table 4.4.1 of HI-STORE CIS SAR [1].
- 3. The MPC component temperatures and internal cavity pressure must be below the limits discussed in Section 4.3 of HI-STORE CIS SAR [1].
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Holtec Report HI-2177553 A-9 Holtec Project 5025 A.6 COMPUTER PROGRAM AND FILES The commercial CFD code, FLUENT version 14.5.7 [8] is used in these thermal calculations. A list of the computer files supporting the calculations is provided below.
[PROPRIETARY PER 10CFR2.390
]
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 25 of 71
Holtec Report HI-2177553 A-10 Holtec Project 5025 A.7 RESULTS AND CONCLUSIONS A.7.1 Normal Onsite Transfer A.7.1.1 Maximum Temperatures during Normal Onsite Transfer Steady state analysis is performed using the 3-D thermal model described in Section A.2. The computed temperatures are listed in Table A.7.1 The peak cladding temperature, MPC and HI-TRAC component temperatures are well within the limits outlined in Section A.5.
The temperature contours for the normal onsite transfer scenario are provided in Figure A.7.1 through A.7.8.
A.7.1.2 Maximum Normal Operating Pressure (MNOP) during Normal Onsite Transfer Per the HI-STAR 190 SAR [5], the MPC cavity is de-moisturized and backfilled with dry helium after fuel loading and prior to MPC lid closures. During the onsite transfer, the MPC internal pressure reaches a value depending upon the steady state temperature. The steady state MPC cavity pressure during onsite transfer in HI-TRAC CS is calculated using the Ideal Gas Law.
The MPC cavity pressure calculated using Ideal Gas Law and based on the maximum initial backfill pressure from Table 1.2 of this report, is reported in Table A.7.2 of this Appendix. The maximum cavity pressure is below the MPC design pressure limit under normal conditions specified in Chapter 4 of HI-STORE CIS SAR [1].
A.7.1.3 Thermal Expansion Computations In this subsection, thermal expansion of free-standing HI-TRAC CS/MPC-37 components in the radial and axial directions is computed for the bounding scenario described in Section A.1. The calculations address the following thermal expansions:
a) Fuel Basket-to-MPC Radial Growth b) Fuel Basket-to-MPC Axial Growth c) MPC-to-Cask Radial Growth d) MPC-to-Cask Axial Growth ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 26 of 71
Holtec Report HI-2177553 A-11 Holtec Project 5025 (a) Fuel Basket-to-MPC Radial Growth The radial growth (1) of the fuel basket relative to the MPC shell upon heating from a 21oC (70oF) reference temperature (To) to steady state temperatures is computed as follows:
[PROPRIETARY PER 10CFR2.390] --------------- (Eq. A.7.1)
[PROPRIETARY PER 10CFR2.390
]
The fuel basket radial growth is computed in the spreadsheet listed in Section A.6, and reported in Table A.7.3. This differential growth is bounded by the minimum design gap engineered between the fuel basket and the MPC shell (see Table A.7.3).
[PROPRIETARY PER 10CFR2.390
].
(b) Fuel Basket-to-MPC Axial Growth The axial growth of the fuel basket relative to the MPC shell (2) upon heating from a 21oC (70oF) reference temperature to steady state temperatures is computed as follows:
[PROPRIETARY PER 10CFR2.390]
(Eq. A.7.2)
[PROPRIETARY PER 10CFR2.390 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 27 of 71
Holtec Report HI-2177553 A-12 Holtec Project 5025
]
The net fuel basket axial growth is computed in the spreadsheet listed in Section A.6, and reported in Table A.7.3. This differential growth is bounded by the design gap engineered between the fuel basket and the MPC lid (see Table A.7.3).
(c) MPC-to-Cask Radial Growth The radial growth (3) of the MPC shell residing in the HI-TRAC CS cask relative to the cask upon heating from a 21oC (70oF) reference temperature (To) to steady state temperatures is computed as follows:
[PROPRIETARY PER 10CFR2.390] --------------- (Eq. A.7.3)
[PROPRIETARY PER 10CFR2.390
]
The fuel basket radial growth is computed in the spreadsheet listed in Section A.6, and reported in Table A.7.3. This differential growth is bounded by the design gap engineered between the MPC and HI-TRAC CS cask (see Table A.7.3).
(d) MPC-to-Cask Axial Growth The axial growth of the fuel relative to the HI-TRAC inner shell (4) upon heating from a 21oC (70oF) reference temperature to storage temperatures is computed as follows:
[PROPRIETARY PER 10CFR2.390] ---------- (Eq. A.7.4)
[PROPRIETARY PER 10CFR2.390 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 28 of 71
Holtec Report HI-2177553 A-13 Holtec Project 5025
].
The net MPC axial growth is computed in the spreadsheet listed in Section A.6, and reported in Table A.7.3. This differential growth is bounded by the design gap engineered between the MPC and cask shield ring (see Table A.7.3).
A.7.2 Additional Discussions:
A.7.2.1 Acceptability of Sub-Design Heat Load:
A sub-design basis (SDB) heat load pattern with wider helium backfill range is defined for both MPC-37 and MPC-89 is also permitted to be transported in the HI-STAR 190 cask as discussed in Section 3.3.5 of HI-STAR 190 SAR [5]. Since the SDB heat load pattern allows a higher backfill upper limit, explicit analysis was performed in the HI-STAR 190 SAR [5] (Table 3.3.8) demonstrating that the design basis MNOP is higher than the sub design basis MPC pressure.
This conclusion therefore can be extended to the normal onsite transfer scenario in HI-TRAC CS. Additionally, the MPC cavity pressure during onsite transfer, reported in table A.7.3 is lower than the normal transport condition pressures reported in Table 3.1.5 of HI-STAR 190 SAR [5].
Therefore, the temperatures and pressures under SDB heat load patterns defined in HI-STAR 190 SAR will meet the acceptance criteria in Section A.5 for onsite transfer in HI-TRAC CS.
A.7.2.2 16x16A Intact Fuel in Damage Fuel Containers (DFCs):
The HI-STAR 190 is permitted to transport of 16x16A intact fuel assemblies placed within DFCs and loaded in MPC-37 canisters as discussed in section 3.3.6 of HI-STAR 190 SAR [5]. The PCT, component temperatures and MPC cavity pressures are all bounded by the licensing basis normal transport scenario reported in Table 3.1.1 of the HI-STAR 190 SAR [5]. Therefore, it can also be concluded that the maximum temperatures and cavity pressure during onsite transfer MPC-37 loaded with 16x16A intact fuel assemblies placed in DFCs, in HI-TRAC CS is bounded by the bounding onsite transfer scenario evaluated in Section A.7.1.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 29 of 71
Holtec Report HI-2177553 A-14 Holtec Project 5025 Table A.2.1: 24 Hours Averaged Solar Insolation Data from 10CFR71 Form and location of surface Total insolation averaged over a 24-hour period (g cal/cm2)
Flat surfaces transported horizontally; Base Other surfaces None 400 Flat surfaces not transported horizontally 100 Curved surfaces 200 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 30 of 71
Holtec Report HI-2177553 A-15 Holtec Project 5025 Table A.7.1 Maximum Temperatures for HI-TRAC CS/MPC-37 loaded with PWR Short Fuel under Heat Load Patter 1 during Normal Onsite Transfer Material/Components Maximum Temperatures oC (F)
Temperature Limits oC (F)
Fuel Cladding 354 (669) 400 (752) or 570 (1058) Note 2 Fuel Basket 324 (615) 500 (932)
Basket Shims 264 (507) 500 (932)
MPC Shell 238 (461) 427 (800)
MPC Lid Note 1 213 (416) 427 (800)
MPC Baseplate Note 1 173 (343) 427 (800)
HI-TRAC Concrete Note 1 133 (271) 149 (300)
HI-TRAC Outer Shell 93 (200) 316 (600)
HI-TRAC Inner Shell 178 (352) 316 (600)
Shield Gate Top Flange 142 (288) 316 (600)
Shield Gate Door 169 (336) 316 (600)
Note 1: Maximum Section Average Temperature is reported for this component.
Note 2: The 1058°F temperature limit applies to MPCs containing all moderate burnup fuel. The limit for MPCs containing one or more high burnup fuel assemblies is 752°F.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 31 of 71
Holtec Report HI-2177553 A-16 Holtec Project 5025 Table A.7.2 MPC Cavity Pressure during Normal Onsite Transfer in HI-TRAC CS Condition Pressure kPa (psig)
Pressure Limit kPa (psig)
Normal Onsite Transfer 661.6 (96.0) 827.1 (120)
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 32 of 71
Holtec Report HI-2177553 A-17 Holtec Project 5025 Table A.7.3 Differential Thermal Expansions during Normal Onsite Transfer Gap Description Nominal Gap (U), mm (inch)
Differential Expansion (V),
mm (inch)
Is Free Expansion Criteria Satisfied?
(i.e. U > V)
Fuel Basket-to-MPC Radial Gap
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
Yes Fuel Basket-to-MPC Axial Gap
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
Yes MPC-to-Cask Radial Gap
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
Yes MPC-to-Cask Axial Gap
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
Yes Note 1: The MPC height used for the thermal evaluations is that corresponding to the PWR short fuel as explained in Section A.1 resulting in bounding temperatures. However, the minimum cold gap obtained using the longest MPC-37 height of [PROPRIETARY PER 10CFR2.390] is used as the acceptance criteria, here. This is conservative.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 33 of 71
Holtec Report HI-2177553 A-18 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
Figure A.3.1: HI-TRAC CS/MPC-37 Thermal Model ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 34 of 71
Holtec Report HI-2177553 A-19 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
Figure A.7.1 Temperature Contours of HI-TRAC CS/MPC-37 under the Normal Onsite Transfer ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 35 of 71
Holtec Report HI-2177553 A-20 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
Figure A.7.2 Temperature Contours at hottest cross section of HI-TRAC CS/MPC-37 under the Normal Onsite Transfer scenario.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 36 of 71
Holtec Report HI-2177553 A-21 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
Figure A.7.3 Temperature Contour of MPC Shell under the Normal Onsite Transfer scenario.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 37 of 71
Holtec Report HI-2177553 A-22 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
Figure A.7.4 Temperature Contour of MPC Baseplate under the Normal Onsite Transfer scenario.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 38 of 71
Holtec Report HI-2177553 A-23 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
Figure A.7.5 Temperature Contour of MPC Lid under the Normal Onsite Transfer scenario.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 39 of 71
Holtec Report HI-2177553 A-24 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
Figure A.7.6 Temperature Contour of MPC Lid top surface under the Normal Onsite Transfer scenario.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 40 of 71
Holtec Report HI-2177553 A-25 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
Figure A.7.7 Temperature Contour of HI-TRAC CS components in the vicinity of trunnions.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 41 of 71
Holtec Report HI-2177553 A-26 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
Figure A.7.8 Temperature Contours of HI-TRAC CS bottom shield gate assembly under the Normal Onsite Transfer scenario. Bulk temperature of this component is 142oC.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 42 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-1 Holtec Project 5025 Appendix B:
Thermal Analysis of HI-TRAC CS Hypothetical Accident Scenarios ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 43 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-2 Holtec Project 5025 B.1 INTRODUCTION The thermal analysis of the HI-TRAC CS during hypothetical accident scenarios postulated in
[1] is presented in this Appendix.
B.1.1 VCT Fire Accident:
During the Onsite Transfer, the HI-TRAC CS loaded with MPC is transported from the CTB to the UMAX Storage Modules using a VCT. The hypothetical fire accident is assumed to be occurred during this onsite transport of HI-TRAC CS using the VCT, with a gator/utility vehicle nearby. The relative position of HI-TRAC CS, VCT and a gator/utility vehicle cask considered for the analysis is illustrated in Figure D.1.
The liquid fire duration is calculated based on the fuel and hydraulic fluid inventory of the VCT as well as a gator/golf cart/utility vehicle in the vicinity. To evaluate the effect of liquid fire on HI-TRAC CS and loaded MPC, a transient CFD analysis is performed and the calculation is continued after the postulated fire duration, until the peak cladding temperature reaches its maxima and starts decreasing. The fire evaluations are performed based on the requirements set forth in 10CFR71 (outlined in Chapter 6 of [1]).
The effect of solid fire resulting from the hypothetical scenario of the gator/utility vehicle wheels being ignited is also evaluated following the methodology outlined in Section B.2.
The sources of combustible materials considered for the evaluation include:
- [PROPRIETARY PER 10CFR2.390
- ]
The quantities of these combustibles are listed in Table B.1.1. The assumed parameters for the utility vehicle wheels are listed in Table B.1.2.
B.1.2 Canister Transfer Building (CTB) Collapse Accident:
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 44 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-3 Holtec Project 5025 As outlined in Chapter 6 of [1], the CTB is assumed to collapse and [PROPRIETARY PER 10CFR2.390] is assumed to block parts of the HI-TRAC CS cask. The effect of flow blockage due to the corrugated sheets, as well as the radiation blockage are captured in the thermal model in a bounding manner. A steady state analyses is performed under this condition to ensure that the bounding temperatures are predicted. The design basis accident as defined in the HI-STORE CIS Licensing Report [1] is adopted for the evaluations of the CTB collapse event.
The bounding fuel assembly type, heat load and MPC type as justified in Appendix A is used for all the analyses presented here.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 45 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-4 Holtec Project 5025 B.2 METHODOLOGY AND ASSUMPTIONS The thermal model used for the accident analyses are directly adopted from the normal onsite transfer calculations presented in Appendix A. Changes are made to the boundary conditions to evaluate the specific accidents. The changes made to the model and assumptions involved in the analyses are listed in this section.
B.2.1 Hypothetical Fire Accident:
The fire event involving the VCT and gator/utility vehicle is postulated to consist of three phases as follows:
[PROPRIETARY PER 10CFR2.390
].
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 46 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-5 Holtec Project 5025 B.2.1.1 Liquid Phase Fire:
The methodology and major assumptions adopted for liquid fire analysis is listed below:
[PROPRIETARY PER 10CFR2.390
].
B.2.1.2 Solid Phase Fire:
The following methodology is adopted for evaluating the temperature difference due to the solid phase fire:
[PROPRIETARY PER 10CFR2.390 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 47 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-6 Holtec Project 5025
].
B.2.2 Hypothetical CTB Collapse event:
The 3-D thermal model used for the CTB collapse event is adopted from the thermal model for normal onsite transfer analysis. The boundary conditions are altered in the Fluent model to reflect the design basis event. The following modifications and assumption are involved in the thermal analysis:
[PROPRIETARY PER 10CFR2.390 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 48 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-7 Holtec Project 5025
].
A steady state analysis is performed for the hypothetical CTB collapse accident to obtain bounding maximum temperatures.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 49 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-8 Holtec Project 5025 B.3 INPUT DATA The thermal model is directly adopted from Appendix A of this report. The source and quantity of liquid and solid combustibles used for the fire analysis are listed in Table B.1.1. The relevant parameters of the gator/utility vehicle adopted for the solid phase fire are listed in Table B.1.2.
The additional input data used for the calculation of fire durations are listed in Appendix C and Appendix D.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 50 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-9 Holtec Project 5025 B.4 ACCEPTANCE CRITERIA The acceptance criteria for the HI-TRAC CS accident scenarios are outlined in Section 4.3 of the HI-STORE CIS SAR [1]. Specifically, under accident scenarios:
- 1. The Peak Cladding Temperature must be below 570oC (1058oF) during accident conditions [7].
- 2. The HI-TRAC CS component temperatures must be below the limits specified in Table 4.4.1 of [1]. The portion of concrete that exceeds the limit of 1100oF will be considered unavailable for shielding as per Table 4.4.1 of HI-STORE CIS SAR [1].
- 3. For the fire accident, the temperature of carbon steel components directly exposed to the fire must be below 50% of the melting point given in [B-2], as per the requirement set forth in Table 4.4.1 of [1].
- 4. The MPC component temperatures and internal pressure must be below the accident conditions limits discussed n Section 4.3 of the HI-STORE SAR [1].
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 51 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-10 Holtec Project 5025 B.5 COMPUTER PROGRAM AND FILES The commercial CFD code, FLUENT version 14.5.7 [8] is used in these thermal calculations. A list of the computer files supporting the calculations is provided below.
[PROPRIETARY PER 10CFR2.390
]
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 52 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-11 Holtec Project 5025 B.6 RESULTS AND CONCLUSIONS ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 53 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-12 Holtec Project 5025 B.6.1 Maximum Temperatures and MPC Pressure During the VCT Fire Event:
B.6.1.1 Liquid Phase Fire The bounding steady state HI-TRAC CS normal on-site transfer temperatures (see Table A.7.1) are adopted as the initial condition for the transient fire accident (fire and post-fire) evaluation.
The transient study was conducted for a sufficiently long period to allow temperatures in the overpack to reach their maximum values and begin to recede. The maximum temperature for each component during and after the fire accident is obtained from the transient analysis and reported in Table B.6.1.1.
As shown in Figure B.6.1.1, the peak cladding temperature reaches the maximum value at about
[PROPRIETARY PER 10CFR2.390] after the start of the fire event.
The MPC cavity bulk temperature reaches its maxima at around [PROPRIETARY PER 10CFR2.390] after the start of fire. The maximum MPC pressure during the post fire duration is listed in Table B.6.1.2.
Due to direct exposure to the hypothetical fire (modelled as 1475oF heat source), some part of the HI-TRAC CS concrete exceeds the temperature limit. As stated in Chapter 4 of the HI-STORE CIS Licensing Report [1], the concrete that exceeds 1100oF shall be considered unavailable for shielding. The regions of concrete that exceed this limit is shown in Figure B.6.1.2. As shown in the figure a negligible portion of concrete exceeds 1100oF at the end of fire.
The peak cladding temperature, maximum component temperature and MPC cavity pressures reported in Tables B.6.1.1 and B.6.1.2 are within their respective limits provided in Chapter 4 of
[1].
B.6.1.1 Solid Phase Fire The total heat flux incident on HI-TRAC CS cask from the solid phase fire is calculated in Appendix D. Based on the calculations presented in the spreadsheet [PROPRIETARY PER 10CFR2.390 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 54 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-13 Holtec Project 5025
], the temperatures will essentially be the same as that reported in Table B.6.1.1 and the maximum MPC cavity pressure will be essentially same as that reported in Table B.6.1.2.
B.6.2 Maximum Temperatures and MPC Pressure During CTB Collapse Event:
A steady state analysis is performed using the thermal model described in Section B.2 for the CTB collapse accident. The maximum peak cladding temperature and HI-TRAC/MPC component temperatures are presented in Table B.6.2.1. The maximum MPC pressure for the CTB collapse event is reported in Table B.6.2.2. The PCT, component temperatures and MPC internal pressures are within their respective accident condition limits specified in Chapter 4 of the HI-STORE CIS Licensing Report [1].
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 55 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-14 Holtec Project 5025 B.7
REFERENCES:
[B-1] Thermal Measurements in a Series of Large Pool Fires, SAND85-1096, Sandia National Laboratories, (August 1987).
[B-2] Carbon Steel Handbook, EPRI, Palo Altom CA: 2007. 1014670.
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 56 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-15 Holtec Project 5025 Table B.1.1 Source and Quantity of Combustible for the Hypothetical Fire Accident Source Quantity Reference VCT Diesel Fuel
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
VCT Hydraulic Fluid
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
Utility Vehicle Diesel Fuel
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
Total Rubber Mass from Utility Vehicle Tires
[PROPRIETARY PER 10CFR2.390]
[PROPRIETARY PER 10CFR2.390]
Table B.1.2 Gator/Utility Vehicle Parameters adopted for Solid Phase Fire Parameter Value Tire Diameter
[PROPRIETARY PER 10CFR2.390]
Number of Wheels
[PROPRIETARY PER 10CFR2.390]
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 57 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-16 Holtec Project 5025 Table B.6.1.1 Maximum Temperatures for HI-TRAC CS/MPC-37 during VCT Fire Accident Material/Components Temperature oC (F)
Temperature Limit oC (F) [1]
End of Fire Post Fire Fuel 354 (670) 372 (701) 570 (1058)
Fuel Basket 324 (615) 343 (650) 570 (1058)
Basket Shims 264 (508) 281 (537) 570 (1058)
MPC Shell 267 (512) 267 (512) 570 (1058)
MPC Lid Note 1 245 (474) 245 (474) 570 (1058)
MPC Baseplate Note 1 219 (426) 275 (527) 570 (1058)
HI-TRAC Concrete 749 (1380) 749 (1380) 593 (1100)
HI-TRAC Outer Shell Note 3 589 (1092) 589 (1092) 713 (1315)Note 4 HI-TRAC Inner Shell 474 (886) 474 (886) 713 (1315) Note 4 Shield Gate Top Flange Note 3 371 (700) 371 (700) 713 (1315) Note 4 Note 1: Maximum Section Average Temperature is reported for this component.
Note 2: The volume of concrete that exceeds the temperature limit is shown in Figure B.6.2.1 and shall be considered unavailable for shielding.
Note 3: Bulk temperature reported for this component.
Note 4: 50% of melting point of carbon steel from [B-2].
Table B.6.1.2 Maximum MPC Pressure during VCT Fire Accident Condition Bulk Temperature oC (F)
Pressure kPa (psig)
VCT Fire Accident 284 (542) Note 1 691 (100.2)
Note 1: The maximum cavity average temperature is obtained at [PROPRIETARY PER 10CFR2.390] after the start of fire.
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HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-17 Holtec Project 5025 Table B.6.2.1 Maximum Temperatures for HI-TRAC CS/MPC-37 after the CTB Collapse Accident Material/Components Maximum Temperatures oC (F)
Temperature Limits [1]
oC (F)
Fuel 492 (918) 570 (1058)
Fuel Basket 465 (869) 570 (1058)
Basket Shims 403 (757) 570 (1058)
MPC Shell 381 (718) 570 (1058)
MPC Lid Note 1 343 (649) 570 (1058)
MPC Baseplate Note 1 339 (642) 570 (1058)
HI-TRAC Concrete 338 (640) 343 (650)
HI-TRAC Outer Shell 177 (351) 371 (700)
HI-TRAC Inner Shell 339 (642) 371 (700)
Shield Gate Top Flange 293 (559) 371 (700)
Shield Gate Door 336 (637) 371 (700)
Note 1: Maximum Section Average Temperature is reported for this component.
Table B.6.2.2 Maximum MPC Pressure after the CTB Collapse Accident Condition Bulk Temperature oC (F)
Pressure kPa (psig)
VCT Fire Accident 408 (766) Note 1 867 (125.8)
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 59 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-18 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 60 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 B-19 Holtec Project 5025
[PROPRIETARY PER 10CFR2.390]
ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 61 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 C-20 Holtec Project 5025 Appendix C:
Calculation of Liquid Phase Fire Duration ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 62 of 71
C.1 WORKSHEET-SPECIFIC INTRODUCTION The purpose of this calculation is to determine the duration of a combustible liquid fire involving a tracked VCT carrying a HI-TRAC CS cask. The procedure is as follows:
[PROPRIETARY PER 10CFR2.390
].
This approach to calculating the duration of the fire is consistent with the methodology described in the HI-STORM FW FSAR [B-1] which is in accordance with NRC Regulations, 10CFR71.
C.2 WORKSHEET-SPECIFIC REFERENCES
[C-1] "HI-STORM FW Final Safety Analysis Report," Holtec Report HI-2114830, Revision 4.
[C-2] [PROPRIETARY PER 10CFR2.390].
[C-3] "HI-TRAC CS Licensing Drawing" Holtec Drawing 10868R0.
[C-4] [PROPRIETARY PER 10CFR2.390]
[C-5] NRC Regulations (10CFR), Part 71.73.
[C-6] Thermal Measurements in a Series of Large Pool Fires, SAND85-1096, Sandia National Laboratories, (August 1987).
[C-7] [PROPRIETARY PER 10CFR2.390
]
C.3 WORKSHEET-SPECIFIC INPUT DATA
[PROPRIETARY PER 10CFR2.390
]
Holtec Report HI-2177553 C-2 Holtec Project 5025 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 63 of 71
C.4 WORKSHEET-SPECIFIC CACULATIONS C.4.1 Calculate Area of Fuel Spread
[PROPRIETARY PER 10CFR2.390 Holtec Report HI-2177553 C-3 Holtec Project 5025 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 64 of 71
].
Holtec Report HI-2177553 C-4 Holtec Project 5025 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 65 of 71
Holtec Report HI-2177553 C-5 Holtec Project 5025 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 66 of 71
HOLTEC PROPRIETARY INFORMATION Holtec Report HI-2177553 D-1 Holtec Project 5025 Appendix D:
Calculation of Heat Flux from Utility Vehicle Tire Fire ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 67 of 71
Appendix-D-Tire-Fire-NP.xmcd D.1 WORKSHEET-SPECIFIC INTRODUCTION The purpose of this calculation is to determine the heat flux from the burning gator/golf cart tire rubber that impinges on the HI-TRAC cask. The procedure is as follows:
[PROPRIETARY PER 10CFR2.390
].
The duration of the burning tire rubber is also determined.
D.2 WORKSHEET-SPECIFIC REFERENCES
[D-1] [PROPRIETARY PER 10CFR2.390
].
[D-2] Not used
[D-3] HI-TRAC CS Licensing Drawing", Holtec Drawing 10868 Revsion 0.
[D-4] "Fire Test With a Front Wheel Loader", SP Report P801596, 15 October 2008.
[D-5] Howell, J.R., "A Catalog of Radiation Heat Transfer Configuration Factors," 3rd Edition, online at www.engr.uky.edu/rtl/Catalog/.
D.3 WORKSHEET-SPECIFIC INPUT DATA FOR GATOR TIRE FIRE
[PROPRIETARY PER 10CFR2.390 Holtec Report HI-2177553 D-2 Holtec Project 5025 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 68 of 71
Appendix-D-Tire-Fire-NP.xmcd Holtec Report HI-2177553 D-3 Holtec Project 5025 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 69 of 71
Appendix-D-Tire-Fire-NP.xmcd
].
Holtec Report HI-2177553 D-4 Holtec Project 5025 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 70 of 71
Appendix-D-Tire-Fire-NP.xmcd Attachment D-1: View Factor Calculation from Reference [D-5]:
Holtec Report HI-2177553 D-5 Holtec Project 5025 ATTACHMENT 3 TO HOLTEC LETTER 5025029 Page 71 of 71