Calculation NUH32PTH1-0421, 'Thermal Analysis of HSM-H ... · A Calculation No.: NUH32PTHl-0421...

Enclosure 2 to E-25259

Transnuclear, Inc. Calculation NUH32PTH1-0421, "Thermal Analysis ofHSM-H Loaded with 32PTH1 DSC," Revision 0 (Non-proprietary version,

without discs)

A Calculation calculatfonNo..: NUH32PTH.-0421A C alc lationRevision No.:

TRANSNUCLEAR Cover Sheet Page: If45A14 AREVA COMPAyP

I

DCR NO: N/A PROJECT NAME: NUHOMS 32PTHI Transportable and Storagesystem

PROJECTUO: NUH32PTHi CUENT: Transnuc'ear, Inc

CALCUI..ATIoH TiTLE:

I heimal Anallsis of T;SIM-U Loaded with 32PTlt DSC

SUMMARY DESCRIP11ON:

The calculation presents thermal analysis of the HSM-H loaded with 32PTHI DSC for normal,off-normal, and accident storage conditions The calculation determines the temperaturedistribution of 32PTHi DSC shell and HSM-H components to support an amendmentapplication of the NUHOMS"COC 1004

If original Issue, Is lcensing review per TIP 3.5 required?

Yes 0 No 0 (explain below) Llcenalng Review No.:

This calculation is one oftie design basis calculations to suppoit the cunent licensing submittal for the N.'HOMS"

32?IHI system. Thezcfo:e, a 72.43 review by Transnulear is not nesessazy

Software UtIlized: Version: Number of CDs:

ANSYS 8.1 3

Calculation Is complete:

Oriuginator Signature: a:

Calculation has bean checked for consistency, completeness and correctness:

Checker SintAF Date

Calculation Is approvpd for use:

Project Engineer Signature:;

Forn.3 2-1 Rev. 1, Equkalont

Cakculation No.: NUH32PTHI-0421Revision No.: 0

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A Calculation No.: NUH32PTH1-0421

TRANSNUCLEAR CalculationAN AREVA COMPA" Revision No.: 0

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TABLE OF CONTENTSPage

1 Purpose ................................................................................................................................... 5

2 References .............................................................................................................................. 5

3 Assum ptions and Conservatism ......................................................................................... 7

4 Design Input ............................................................................................................................ 8

4.1 M aterial Properties ....................................................................................................... 8

4.2 Effective Properties for NUHOMS-32PTHI DSC Basket (Mat 11) ............................. 10

4.3 32PTH 1 DSC Configuration ..................................................................................... 11

5 M ethodology ......................................................................................................................... 12

5.1 ANSYS Finite Elem ent M odels ................................................................................. 13

5.2 Boundary conditions for Normal, Off-Normal and Accident Conditions (Steady State).. 14

5.3 Boundary Conditions for Accident Blocked Vent Conditions (Transient) ................... 17

6 Com putations ........................................................................................................................ 19

7 Results ................................................................................................................................... 21

Appendix A - Thermal Input for DSC Ends Structure Analysis .............................................. 41

A Calculation No.: NUH32PTHl-0421

TRANSNUCLEAR CalculationAN AREVA COMPANY Revision No.: 0

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LIST of FIGURES

Figure 5-1 Finite Element Model ........................................................................................................ 23Figure 5-2 Finite Element Model, DSC and Support Structure ............................................................ 24Figure 5-3 Finite Element Model, Concrete Structure ................................. 25Figure 5-4 Finite Element Model, Heat Shields and Support Structure .............................................. 26Figure 5-5 Convection Boundary Condition on DSC Shell ................................................................ 27Figure 5-6 Convection Boundary Conditions for HSM-H ..................................................................... 28Figure 5-7 Heat Flux and Fixed Temperature Boundary Conditions for HSM-H ................................. 29Figure 5-8 Convection Boundary Conditions Applied on HSM-H Walls .............................................. 30Figure 7-1 Temperature Plot for Normal Storage Conditions (00F ambient, 40.8 kW) ......................... 31Figure 7-2 Temperature Plot for Normal Storage Conditions (1 060F ambient, 40.8 kW) .................... 32Figure 7-3 Temperature Plot for Off-Normal Storage Conditions (-40°F ambient, 40.8 kW) ............... 33Figure 7-4 Temperature Plot for Off-Normal Storage Conditions (1 170F ambient, 40.8 kW) .............. 34Figure 7-5 Temperature Plot for Accident Storage Conditions (133 0F ambient, 31.2 kW) ................... 35Figure 7-6 Temperature Plot for Accident Storage Conditions (1 330F ambient, 40.8 kW) ................... 36Figure 7-7 Temperature Plot for Blocked Vent Accident Storage Conditions (31.2 kW, 40 hrs) .......... 37Figure 7-8 Temperature Plot for Blocked Vent Accident Storage Conditions (40.8 kW, 35 hrs) .......... 38Figure 7-9 Temperature History for Blocked Vent Accident Storage Conditions (31.2 kW) ............... 39Figure 7-10 Temperature History for Blocked Vent Accident Storage Conditions (40.8 kW) ............. 40Figure A-1 DSC shell temperature plots for 40.8 kW, off-normal -40°F and 117 0F ambient

storage conditions (Input for DSC ends structural analysis) ........................................... 44Figure A-2 DSC shell temperature plots for 31.2 kW, off-normal -40°F and 117 0F ambient

storage conditions (Input for DSC ends structural analysis) ........................................... 45

LIST of TABLES

Table 1-1 HSM-H Design Options for 32PTH and 32PTH1 DSCs ........................................................ 5Table 4-1 Thermal properties of Stainless Steel SA 240, type 304 ....................................................... 8Table 4-2 Thermal properties of Carbon Steel ASTM A36 ................................................................... 8Table 4-3 Thermal properties of concrete ............................................................................................ 9Table 4-4 Thermal properties of soil ...................................................................................................... 9Table 4-5 Thermal properties of Air ....................................................................................................... 9Table 4-6 Effective Thermal properties of 32PTH1 DSC Basket [15] .................................................. 10Table 4-7 32PTH1 DSC Configurations [1] .......................................................................................... 11Table 5-1 HSM-H Exit Air Temperature Applied ................................................................................. 14Table 5-2 H SM -H Insolation .................................................................................................................... 16Table 6-1 ANSYS Run Summary ......................................................................................................... 19Table 6-2 Associated files and macros .............................................................................................. 20Table 7-1 Maximum Component Temperatures for Normal/Off-Normal and Accident Conditions ..... 21Table 7-2 Maximum Component Temperatures for Accident Blocked Vent Case, OF ........................ 22

A Calculation No.: NUH32PTHI-0421


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I Purpose

The purpose of this calculation is to determine the temperature distribution of the HSM-H

concrete, heat shields, support structure, and DSC shell for normal, off-normal and accident

storage conditions in support of an amendment to the NUHOMS®COC 1004 to allow high burnup

fuel to be loaded in the 32PTH1 DSC with up to 40.8 kW total heat load [1].-= 'ý77-77 tl

Proprietary Information Withheldin accordance with 10 CFR 2.390

2 References

1.•m--

.i! 172. Report, Safety Analysis Report for the NUHOMS®-HD Horizontal Modular Storage System

For Irradiated Nuclear Fuel, NRC Docket No. 72-01030, Rev.4



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9. Siegel, Howell, Thermal Radiation Heat Transfer, 4 th Edition, 2002.

10. Bentz, A Computer Model to Predict the Surface Temperature and Time-of-wetness of

Concrete Pavements and Bridge Decks, Report # NISTIR 6551, National Institute of

Standards and Technology, 2000.

11. On-Line User's Manual for ANSYS, Revision 8.1.

13. NRC, Code of Federal Regulations, Part 71, Packaging and Transportation of Radioactive

Material, 2003.

14. Final Safety Analysis Report, Standardized NUHOMS® Horizontal Modular Storage System

for Irradiated Nuclear Fuel, Transnuclear Inc, NUH-003, Rev. 8, Docket No. 72-1004.

4,. - V -



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3 Assumptions and Conservatism

The assumptions and conservatism as described for 32PTH DSC/HSM-H model [3] are applied

in this analysis.L.. ..- - ffl .. . ". t .. ... . .. .-Z .. . .. ]

V- 2. WK.- 7ý- --

w sL M-


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4 Design Input

4.1 Material Properties

Stainless Steel SA 240, type 304

Table 4-1 Thermal properties of Stainless Steel SA 240, type 304

uM--


NEU

WON w-- _2 ýPMVMI-

Carbon Steel ASTM A36 V -

Table 4-2 Thermal properties of Carbon Steel ASTM A36

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1_ 1__ 1 Page: 9of45


Concrete FZ}2•'jw7•

The thermal properties of concrete are discussed in detail in [4]. These properties are listed in

Table 4-3.

Table 4-3 Thermal properties of concrete

- ~- ý

soil _.-The properties of soil (Mat 3) are discussed in [4] and summarized in Table 4-4 below.

Table 4-4 Thermal properties of soil

Air _rrTable 4-5 Thermal properties of Air

-~~~~ý 7-- - .~.-



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S, TProprietary Information Withheld

in accordance with 10 CFR 2.390

4.2 Effective Properties for NUHOMS-32PTH1 DSC Basket [ 2

The bounding effective thermal properties for 32PTH 1-S DSC basket -

are calculated in Appendix B of [15]. 95% of the calculated

thermal conductivity values are listed in Table 4-6 and conservatively applied to HSM-H DSC

thermal analysis.

Table 4-6 Effective Thermal properties of 32PTH1 DSC Basket [15]


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4.3 32PTH1 DSC Configuration

Table 4-7 32PTH1 DSC Configurations [1]



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5 Methodology

Horizontal Storage Module, model H (HSM-H) is designed to provide an independent, passive

system with substantial structural capacity to ensure safe storage of spent fuel assemblies in

32PTH1 DSCs. The decay heat load from stored DSCs is removed via combination of radiation,

convection and conduction. Ambient air enters the HSM-H through ventilation inlet openings in

the lower part of the HSM-H side walls and circulates around the DSC and the side heat

shields. Warm air passes through the top heat shield and exits the HSM-H through the outlet

openings in the upper part of the HSM-H side walls.

Decay heat is rejected from the DSC to the HSM-H air space by convection and then is removed

from the HSM-H cavity by natural air circulation. Heat is also radiated from the DSC surface to the

heat shields and HSM-H walls, where natural air circulation and conduction through the walls

remove the heat.

This analysis determines the temperature distribution on the DSC shell, which is used to calculate

the fuel peak cladding temperature in a detailed model of the DSC. The HSM-H wall temperatures

are also determined in this analysis.

Two maximum decay heat loads are considered for the NUHOMS-32PTH1 system: 31.2 kW and

40.8 kW. ZZ h Z Z

....................... • .' •.=L ................. [•L• ¸

E' 7 -- _I-- -±;27 Proprietary Information Withheldin accordance with IU ul-iC .

Ambient temperatures of 0 OF and 106°F are considered as normal storage conditions. The lowest

ambient temperature of -40°F and maximum ambient temperature of 117 0F are used for off-

normal storage condition [4]. Ambient temperature of 133 0F is used for accident condition [1].

JI


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Since the HSM-H is located outdoors, there is a remote probability that the air inlet and outlet

openings become blocked by debris from such events as flooding, high wind, and tornados. The

perimeter security fence around ISFSI and the location of the air inlet and outlet openings

reduces the probability of such an accident. A complete blockage of all inlets and outlets

simultaneously is not a credible event. Nevertheless, to bound this scenario, analysis is carried

out assuming complete blockage of the inlet and outlet vents as an accident case.


The temperature distributions for the normal, off-normal and accident conditions are determined

using a steady-state model For accident blocked vent case, a

transient model includes K&

[1. The models are described in Section 5.1. The boundary conditions are described in Sections

5.2 and 5.3 for steady-state and transient models, respectively.

5.1 ANSYS Finite Element Models

E, :For the

analysis, a half symmetric, three dimensional, finite element model of the HSM-H is developed by

using ANSYS [11] to determine the temperature profiles for normal, off-normal and accident

conditions.

[77 _ _ ___ _ _ 7777- ~ ~ ~ ~ ~ ' ,. . ,-.--..- 2

S~. .... -~

77



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NO-

-.. ._0 f

F

Proprietary Information WithheldI in accordance with 10 CFR 2.390

t7

The material properties used in the finite element models are listed in Section 4.

5.2 Boundary conditions for Normal Off-Normal and Accident Conditions (SteadyState)

The thermal test of HSM-H documented in [5] and the methodology described in [4] are basis for

defining the boundary conditions for normal, off-normal and accident conditions.

The exit air temperatures used in the HSM-H model are listed in Table 5-1 below.

Table 5-1 HSM-H Exit Air Temperature Applied

Heat Load, Conditions Ambient Temperature, Exit Air Temperature [12],kW OF F

0 78Ndrmal Storage 106 203

40.8 Off-Normal Storage 30117 216

Accident 133 235

Normal Storage 0 64Normal Storage 106 187

31.2 -40 18Off-Normal Storage 117 199

Accident 133 217

7777TM,~nr.7u~.~irv.2.rz:;r.



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JO z 'A"

7____7

a

[zzznzzProprietary Information Withheld


L

S-~-

~~:-j~-~

~-~--~ --7

7<'.. <-.2.

Insolance is considered on the roof and front wall of the HSM-H, which are exposed to the

ambient. Tu __________

-. F 7.- i.- 7L-'~Y-jZ - '~ ~ l ~ A -i~..~~.-~- .~

______ ~ 7~T - -- ' ~-J-~- - I'. --

S-.~ ~ * '- .-.

L The values of the applied heat fluxes are listed in Table 5-2 below.


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Table 5-2 HSM-H Insolation

Component

I HSM-H roofI HSM-H front wall

To maximize thermal gradients in the HSM-H concrete structure, insolance is not considered fo

the minimum ambient temperature of -400F. j I

r

son "ISMProprietary Information Withheld


[Ii:

t The applied decay

heat flux is:

Decay heat flux, 4 =rr D, L

Btuhr . in'

where

Q = total decay heat load (31.2 kW and 40.8 kW)

Di = inner DSC diameter -* - I

L = Cavity length



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at

7 ý ý77- 2e-ý'4

.-~Wk~ ~. *A~4-~.<- ~A3VVw343- .'-- ~ 4 4A ?~i p ~ ->~..

[27 .~7.~CThUTt - * '-----:-,.~-~

-2- - - - .-A~ -c-~'~ <-•;---~--- d

:t¾§4 -7, 75AA 77ty

I

- - - .A ,. ,.~---- -~ -

5.3 Boundary Conditions for Accident Blocked Vent Conditions (Transient)

To determine the maximum temperatures of the HSM-H and the DSC shell for the blocked vent

accident case, the finite element model of the HSM-H is modified to a transient model. WtT.~Jt<~§-Tht

- rnr~-r 'w u71a&5K7-~'>¾c½wn;rY4- ~ - 4.

- --- --

i,•,,:Y,, The amount of generated heat per unit volume of the

homogenized basket is calculated as follows:

QHeat generating rate, j" = L(7r14 D121 L)

Btu

hr* in'



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Where

Q = decay heat load (31.2 kW and 40.8 kW),

Di = inner DSC diameter

L = DSC cavity length


,AOnly air conduction is considered within the HSM-H cavity during blockage.

.~~z~~ ....



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6 Computations

A summary of ANSYS runs, macros and associated files used is shown in Table and Table 6-2.

Table 6-1 ANSYS Run Summary



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Table 6-2 Associated files and macros



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7 Results

The maximum 32PTH 1-S DSC component temperatures for the normal, off-normal and accident

cases are summarized in Table 7-1. The temperature plots for steady state normal, off-normal and

accident storage conditions, and transient accident blocked vent condition under 31.2 kW and

40.8 kW heat loads are shown in Figure 7-1 through Figure 7-6.

Table 7-1 Maximum Component Temperatures for Normal/Off-Normal and Accident ConditionsOperating T=,b •*** - i TDscs TcI

conditions OF I .,F--

40.8 kW Heat LoadS 326 12

469 295

484 311

S 484 311

Proprietary lnform•I in accordance withation Withheld 'Z.10 CFR 2.390

.ý- - `7:T

A



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fl

The maximum component temperatures for the blocked vent accident cases without convection

in HSM-H cavity are listed in Table 7-2.

ITable 7-2 Maximum Component Temperatures for Accident Blocked Vent Case, OF

(31.2 kW/40.8 kW)

Component TDSC ShelH Tconcrete

Time, 31.2 40.8 31.2 40.8hrs kW kW kW kW0 400 459 288 319

5 470 543 316 355

10 500 576 332 377

15 520 599 346 39520 535 615 358 410

25 547 628 368 423

28 - 635 - 431

30 557 640 378 436

35 567 650 387 447

40 575 660 396 458



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Figure 5-1 Finite Element Model



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Figure 5-2 Finite Element Model, DSC and Support Structure


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Figure 5-3 Finite Element Model, Concrete Structure



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Figure 5-4 Finite Element Model, Heat Shields and Support Structure



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Figure 5-5 Convection Boundary Condition on DSC Shell



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Figure 5-6 Convection Boundary Conditions for HSM-H

Figure 5-7 Heat Flux and Fixed Temperature Boundary Conditions for HSM-H



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Figure 5-8 Convection Boundary Conditions Applied on HSM-H Walls



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Figure 7-1 Temperature Plot for Normal Storage Conditions (O°F ambient, 40.8 kW)



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Figure 7-2 Temperature Plot for Normal Storage Conditions (1060F ambient, 40.8 kW)



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Figure 7-4 Temperature Plot for Off-Normal Storage Conditions (1 170F ambient, 40.8 kW)



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Figure 7-3 Temperature Plot for Off-Normal Storage Conditions (-40°F ambient, 40.8 kW)



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Figure 7-5 Temperature Plot for Accident Storage Conditions (1 331F ambient, 31.2 kW)



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Figure 7-6 Temperature Plot for Accident Storage Conditions (1 33 0F ambient, 40.8 kW)



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Figure 7-7 Temperature Plot for Blocked Vent Accident Storage Conditions (31.2 kW, 40 hrs)



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Figure 7-8 Temperature Plot for Blocked Vent Accident Storage Conditions (40.8 kW, 35 hrs)



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Figure 7-9 Temperature History for Blocked Vent Accident Storage Conditions (31.2 kW)



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Figure 7-10 Temperature History for Blocked Vent Accident Storage Conditions (40.8 kW)

A Calculation No.: NUH32PTH1-0421TRANSNUCLEAR Calculation

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Appendix A - Thermal Input for DSC Ends Structure Analysis




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Figure A- 1 DSC shell temperature plots for 40.8 kW, off-normal -40°F and 117 0F ambient storageconditions (Input for DSC ends structural analysis)



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Figure A- 2 DSC shell temperature plots for 31.2 kW, off-normal -40°F and 117 0F ambient storageconditions (Input for DSC ends structural analysis)

Calculation NUH32PTH1-0421, 'Thermal Analysis of HSM-H ... · A Calculation No.: NUH32PTHl-0421...

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