Text

Rev 1 to SAR for Model CNS 21-300,Type a Radwaste Shipping Container
	ML20132C237
Person / Time
Site:	07109096
Issue date:	08/31/1985
From:	; CHEM-NUCLEAR SYSTEMS, INC.
To:	;
Shared Package
ML20132C228	List: ML20132C224; ML20132C237;
References
	NUDOCS 8509260500
	Download: ML20132C237 (117)
	v • d • e

SAFETY ANALYSIS REPORT FOR CHEM-NUCLEAR SYSTEMS, INC.

MODEL NO. CNS 21-300 CERTIFICATE OF COMPLIANCE NO. 9096 TYPE A RADWASTE SHIPPING CONTAINER CONSOLIDATED REVISION AUGUST 1985 REVISION I CHEM-NUCLEAR SYSTEMS, INC.

CORPORATE HEADQUARTERS 220 STONERIDGE DRIVE COLUMBIA, SOUTH CAROLINA 29210 8509260500 850826 PDR ADOCM 07109096 B

PDR i

TABLE OF CONTENTS21-300 SHIPPING CASK 1.0 GENERAL INFORMATION 1.1 Introduction 1.2 Package Description

1. 2.1 Packaging 1.2.2 Operational Features 1.2.3 Contents of Packaging 1.3 Appendix 2.0 STRUCTURAL EVALUATION 2.1 Structural Design 2.1.1 Discussion 2.1. 2 Design Criteria 2.2 Weights and Centers of Gravity 2.3 Mechanical Properties of Materials 2.4 General Standards for All Packages 2.4.1 Chemical and Galvanic Reactions 2.4.2 Positive Closure 2.4.3 Lifting Devices 2.4.4 Tiedown Devices 2.5 Standards for Type B Packaging 2.6 Normal Conditions of Transportation 2.6.1 Heat 2.6.2 Cold 2.6.3 Pressure 2.6.4 Vibration 2.6.5 Water Spray 2.6.6 Free Drop 2.6.7 Penetration 2.6.8 Compression 2.7 Hypothetical Accident Conditions 2.8 Special Form 2.9 Fuel Rods 2.10 Appendix 3.0 Thermal Evaluation 4.0 Containment 4.1 Containment Vessel 4.2 Containment Penetration and Closures 5.0 Shielding Evaluation 5.1 Introduction 5.2 Package System Shielding Analysis 5.2.1 Source Specification 5.2.2 Model Specification 6.0 Criticality Evaluation 7.0 Operating Procedures 7.1 Loading Procedure for 55 gallon drums 7.2 Loading Procedure for Liners 7.3 Unloading Procedure 8.0 Acceptance Tests and Maintenance Program 8.1 Structural Tests 8.2 Lid Gasket 8.3 Shielding 8.4 Thermal 9.0 Quality Assurance i

1.0 GENERAL INFORMATION

1.1 INTRODUCTION

The CNSI 21-300 shipping cask is a top-loading, shielded container designed for the transport of Type A and low specific activity (LSA) radioactive wastes. The cask will accommodate twenty one (21) 55 gallon drums, one 300 (nominal) cubic foot liner, or other approved sealed containers.

1.2 PACKAGE DESCRIPTION 1.2.1 Packagina The cask is the primary containment vessel for the transport of radioactive wastes.

It consists of a cask body and main cask lid which incorporates a second smaller diameter lid.

The secondary lid is typically used for access when a disposable liner is inserted in the cask.

The cask is a right circular cylinder 86-3/4-inch diameter by 117-1/4 inch high, with an 83 inch diameter by 109-1/4 inch high cavity.

The cask body is a steel-lead-steel annulus in the form of a vertically oriented, right circular cylinder closed on the bottom. The side walls consist of a 1/8 inch inner stainless steel shell, a 1-inch thick concentric lead cylinder bonded to the inner and outer shells, and a 3/4-inch thick outer steel shell. The steel shell; are welded to a concentric top flange designed to receive a silicone rubber gasket.

The cask primary lid is identical to the cask walls except that the inner shell plate is 1/2-inch steel.

Incorporated into the main cask lid is a secondary lid installed concentric to the main lid. The secondary lid covers a 26-inch diameter opening and is fabricated identical to the cask side walls. The secondary lid is fitted with a neoprene gasket and is bolted to the main lid with eighteen 3/4-inch diameter bolts. The main cask lid is bolted to the cask body with twelve 1 1/4-inch diameter by 61/2-inch long bolts.

The cask bottom consists of a 1/2 inch steel inner wall,1 inch thick lead and is welded to a 3/4 inch thick, 96-inch square baseplate. The cask has two lifting trunnions which are welded to the top flange and the outer steel shell, three lid lift rings and one secondary lid lifting ring which is covered during transport.

l-1 1

The lead shielding consists of sheets of lead bonded by an adhesive to the steel walls. CNSI nanufacturing procedures 2MP-002 and 2MP-003 control the bonding and curing techniques for f abricating each of the steel-lead-steel composite cask components. This fabrication method has been demonstrated to result in lap shear strengths in excess of 5000 psi.

(

Reference:

"How to join lead with Adhesives", ADHESIVES AGE, September 1968 and 3-M Product Specification Data Sheets for 2024-T3 aluminum adherend and AF-126 (008) structural adhesive). This bonding strength is accounted for in certain portions of the structural analysis.

The model 21-300 shipping cask is also capable of accepting an internal auxiliary shield (Dwg. C-ll4-E-0004) and a load distribution pallet (Dwg. C-ll4-D-0006). The packaging configuration can therefore exist in various forms, including the following:

1.

single 300 (nominal) cubic foot liner ii.

21-55 gallon drums with a load distribution pallet.

iii.

21-55 gallon drums with an internal shield and a load distribution pallet.

iv.

Single liner (solidified) with an internal shield The gross cask weight is 57,450 pounds including a maximum payload of 27,250 pounds, including the weight of the liner, internal shield, and/or load distribution pallet if used.

1.2.2 OPERATIONAL FEATURES There are no complex operational requirements associated with this package.

1.2.3 CONTENTS OF PACKAGING (1)

Type and Form of Material (i)

Processed solids, either dewatered, solid or solidified in secondary containers, meeting the requirements for (LSA) radioactive material, or (ii) Solid reactor components in secondary containers as required that meet the requirements for (LSA) radioactive material.

1-2

./.

. _ _ _ _ _... ___ -~. - - -, -

(iii) When liquid or resin waste is shipped using the auxiliary shield it shall be solidified with one of the following solidification media:

(a)

Dow media; (b)

Cement; (c) Asphalt; (d)

Delaware custom media; or (e) Solidification media and process reviewed and approved by the U.S. Nuclear Regulatory Commission, Office of Nuclear Reactor Regulation.

Solidified radiation waste shall have no detectable free standing liquids.

For purposes of this condition, the terminology "no detectible f ree standing liquids" means one-half percent (0.5%) by waste volume of non-corrosive liquids per container.

(2) Maximum quantity of material per package Greater than Type A quantities of radioactive material with the weight of the contents, secondary containers, auxiliary shield, load distribution pallet and shoring not exceeding 27,250 pounds.

(3) Use of Internal Auxiliary Shields An internal auxiliary shield with a 1 inch thick steel wall may be utilized to augment cask shielding effectiveness. This shield is depicted in drawing C-114-E-0004 The structural adequacy of the design is demonstrated in Section 2.6.6 of this SAR, and the shielding effectiveness is evaluated in Section 5.0.

l-3

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1.3 APPENDIX 1.3.1 Figure One -Cask Outline 1.3.2 CNSI Drawing 1-298-101 Rev. K.

1.3.3 CNSI DRAWING NO. C-ll4-E-0004, Rev. B, Full Height Shield for 21-300 Cask 1.3.4 CNSI DRAWING NO. C-ll4-D-0006, Rev. C, Load Distribution Pallet b

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MC Ef es.La 964 Aage LOC 3 t/Sk 1

.....e,~..- r, ~ %, y-Q,s,n PA LLET 2/-300 CASK

~-

..,. nc

~s.e/

,4am

.to*=to voo= v..,

e.-..

ecoe.omont e w a e-nov y'

L.C41 TO M #f *8tODUCED on CIMMEC RE ft

' N

, / (/[,

fi ast D TO CT**eas s*tse0UT voeg esem g

. // q ts.t,etanesa.som o, tsegeeJsuCLEAA Det..

w y

s jf,

g; j?

suc a o e to se arrunneso use

.aouts' TIh

<*/8 ocata k. *. r-

} e5 /f 5C t E5 l seat / or,

4 1

3 l

2 I

1

.j

2.0 STRUCTURAL EVALUATION Analyses are presented herein that demonstrate the acceptability of the packaging design features with respect to regulatory criteria in effect at the time that this container was initially approved for use.

2.1 INTRODUCTION

This section identifies and describes the principal structrual engineering design features of the model 21-300 cask, which are important to safety in compliance with the performance requirements of 10 CFR 71 as applicable for a Type A package.

2,2 WEIGHTS AND CENTERS OF GRAVITY The empty container weighs approximately 30,200 pounds and is capable of carrying a maximum payload of 27,250 pounds.

The center of gravity for the assembled package is located at the approximate geometric center. A weight summary of cask components is as follows:

Cask Shell Weight 26,200 pounds Total Lid Weight 4,000 Maximum Payload 27,250 Gross Cask Weight 57,450 Internal Auxiliary Shield 7,260 Load Distribution Pallet 1,850 The weight of the shield and pallet must be accounted for in the payload so that the allowable gross cask weight is not exceeded.

I 2-1 A

f l

2.3. MECHANICAL PROPERTIES OF MATERIALS The mechanical properties of materials of metallic components used for analysis of the CNSI 21-300 Cask are as follows:

Component Material Allowable External Shells A-36 Steel Fty = 36 ksi Internal Shells A-304 Fty = 30 ksi Trunnions SAE 1018 Fty = 40 ksi Bolts (1-1/4"D.)

SAE J 429,Gr.8 Fty = 130 ksi (Primary lid)

Ftu = 150 ksi Bolts (3/4" D.)

SAE J 429, Gr.2 Fty = 57 ksi (Secondary lid)

Ftu = 74 ksi With Revision J to Dwg. No. 1-298-101, A-36 Steel is replaced with ASTM A-516, Gr.70 Steel. This provides additional safety margins above those shown elsewhere within this report, as follows:

A-36 A-516. Gr.70 % Increase Tension Yield, Fty 36 ksi 38 ksi 5.6%

Tension Ultimate, Ftu 58 ksi 70 ksi 20.7%

The 516 material is incorporated in packagings fabricated after April 14, 1980. Analysis performed for this SAR are based upon the A-36 properties for conservatism.

2.4 GENERAL STANDARDS FOR ALL PACKAGES 2.4.1 Chemical and Galvanic Reactions All solidified radioactive wastes will be contained within 55 gallon drums or approved liners. There is no pote.itial for galvanic or chemical reactions between the packr.ge components and the package contents.

2.4.2 Positive Closure The cask lid is positively closed as noted in Section 1.2.1.

In addition, each cask is equipped with a seal feature which provides positive indication that the cask nay have been tampered with.

The main cask lid is sealed with a silicone rubber gasket and l

the secondary lid with a neoprene seal. Both lids are bolted to assure that they are water and pressure tight.

I 2-2 A

2.4.3 Liftina Devices 10CFR 71.45 (a) requires that any lift point be designed with a minimum safety factor of three against yielding when used to lift the package in the intended manner. The CNS 21-300 package is equipped with two lifting trunnions as shown on CNS drawing 1-298-101 Rev J.

The following anaylsis therefore evaluates one trunnion subjected to 3 times one-half of gross package weight, or a total load of 86,175 pounds. This analysis shows that the lifting devices can withstand 3 times the gross package weight without failure.

l l

l 1

1 1

2-3 l

o

Lifting Devices Analysis ITEM 18: 8"0.D.x 4"THK x 3"I.D. STL GEOMETRY ITEM 28:

3/4"THK x 3" x 18k" STL ITEM 20 3"0.D.

1018 STL LEAD 1"THK

(,.

ITEM 7:

3/4" THICK STL ITEM 1:

4" THICK STL WELD

REFERENCE:

DRAWING NUMBER 1-298-101 Rev. J DETAIL F AND DETAIL LIFTING LUG LOADS The regulatory criterion of three times gross package weight will be shared by two lifting trunnions.

(

2-4

-. i... -

.. _. ~. - _ -

MAXIMUM GROSS PACKAGE WEIGHT, W=57, 450 POUNDS LOAD TO EACH TRUNNION = E = 3(57.45 k) 86.2 k

=

2 2

ANALYSIS

_ ITEM 20 (1018 STEEL)

ALLOWABLE STRESSES:

TENSILE YIELD STRENGTH, Y = 40 ksi 3

Y

23.1 ksi SHEAR STRENGTH, S'

s W

(

END SHEAR BRG. SHEAR

?

LA 'W = 86.2 k/3 = 28.7 k/in

~%

4 k

3)2 2

AREA = "(4 7.07 IN BRG. SHEAR = 5/8 (28.7)(3) = 53.9 k

. Ox

<s,,,,= S3.,,A = 7.. usi < 23.1 2-5

P.

8.7(38

32.3 IN-KIPS BENDING MOMENT

=

3 CR w(1.5 3

2.65 IN S

=

o 4

4

=1.

s 4 40.*. M f

BEND 6

BEARING EYE HOOK ON 3" DIA. BAR 3" DIA. FAR RADIUS EYE HOOK ROARK 8 YOUNG - 5*.h EDITION TABLE 33 E

CASE 2C 0102 6(3) 18 6

=

g b

6-3 3

D1-D2 3

E 28.7(2 )(10 )

220 ksi STRESS = 0.591

= o.591 g

g Even though this calculated stress is hinher than the corresponding allowable, this is not judaed to be significant because this calculation is based on a conservative model.

The actual effect in this situation would be a slight defomation of the hook /bar which would greatly reduce the stress value.

t 2-6

~

P.,

BEARING ON CASK PLATES AND WELD STRENGTH ITEMS 7 & 18 (5/8.)WL = 51.6 kips 60% TO ITEM 7 0h5+0.5 = 0.60 40% TO ITEM 18 TEM 7 ITEM 18 (fBRG) 7 3

j

= 13.76 ksi

~}

Same as above (fBRG)18 (O. )

=

BRG ALLOW A-36 = 0.9 Ys = 32.4 ksi > 13.76 ksi t. OK

7..

t WELD STRENGTHS:

ITEM 7

\\

0.928(6)(fr)(8) = 140 k Obviously OK 2-7

~

ITEM 1 SHEARS 3/8 WL TO ITEM 28 ONLY.

WELD: 0.928(8)(c)(3) = 70 k Obviously OK.

ITEM 28 3/8 WL = 3/8 (86.1) = 32.3 k COMPLETE FIXITY AT ENDS:

3" M= PL/8 = 32.3(15)/8

= 60.5 IN-KIPS f,

3s t.

f3/4T fBEND " 0h5( 2

= 53.8 ksi T00 LARGE!

RECK. USING CLEAR SPAN E = 32.3(12)

= 48.5 IN-KIPS

.1 ksi STILL>Ys f

= 8.5(6)2

=

BEND 0.75(3) 2-8

['

EQUIVALENT DIST. LOAD W = 32.3/7 = 4.61 k/in.

u u

t u

1 1

/

\\

=

3"

/,

3y

/

\\

l' 12" CLEAR

('

ITEM 1 l

0 f

0 SHEAR l

t I

19.4 k 26.68"k 1.55 MOMENT 38.8 I

lSYM.

12) = 38.8 IN-KIPS SAY M = h =

32.

BENDING = 3 2

34.5 ksi

4. Ys = 36 ksi /. OK

=

0

(

2-9 a

I 4

l l

WELDS AT ENDS 38.8/3 = 12.9 kips 0.928(8)(3) = 22.5 k CAPACITY > 12.9 k

.~. O K 3"

J s

?

P 5

ITEM 28 3"

" WELD (9 LIN. INCHES) i i

x J

3" M0 MENT 12.9 k T0P/ BOT SHEAR 19.4 k 022.3 k t. OK S

2-10

s CASK BENDING ROARK & YOUNG - 5th ED.

,g 4

TABLE 30 3(1-g) 3(1-0.09) h=

22 CASE 3

\\ (41.5)2(2.1)2

~

t

~

= 0.14 M=0.14(90)=12.4 i

k COMPOSITE EQUIV. THK I

2M.X R "t

= 2(M )(0.14)2(41.5) 0.77 M,

=

[-

f

=

g 2.1 M = 31.0(0.77) = 24 ksi UPPER POD

.'. O K o

\\

i

(

2-11

-- -J-

2.4.4 Tiedown Devices The package tiedown system must be able to withstand a static force applied at the center of gtavity of the package with a vertical component equal to two times the weight of package and contents, a horizontal component along the direction of travel equal to ten times total loaded weight, and a horizontal component transverse to the travel direction equal to five times the total weight. The resulting stresses in the package material shall be less than appropriate yield strengths.

The tie-down system that evolved satisfying the above is a thickened baseplate with gusset stiffeners in each corner of the baseplate welded to the cask body.

The baseplate consists of two plates welded together to provide a total thickness of 1-1/2 inches. The baseplate is secured to the trailer floor with 16-1 1/4 inch bolts. The following analysis demonstrates the acceptability of this design.

2-12

TIE-DOWN ANALYSIS REFERENCE DRAWING NUMBER 1-298-101 REV. K Q GEOMETRY 86 3/4" 0.D.

..)e.,

'(

- 00 CASK 113" EFF. HGT.

C.G.

X SIDE ELEV.

~

C...

l 1

I 96" SQ. BASE PLATE 3

BASE g

-N PLATE 96" TIE D0WN BOLTS 4 BOLTS 1-1/4 INCH \\

DIAMETER IN EACH CORF!ER

'r '

(

96" 2-13

~^,

LOADS CRITICAL LOADING BASED ON 10G IN DIRECTION OF TRAVEL.

EVALUATE CAPABILITY OF TIE'DOWN SYSTEM TO RESIST TIPPING.

10G,

\\/

WT. = 55.5 kips at IG p

r f'

113/2 = 56.5" 2H 2H +

h a

2V 86" II2V 2M

=07 forward

= 55.5(10)(56.5) -2V(86) = 0 55.5(10)(56.5) 2(86)

= 182.3 kips V

=

each corner bolt detail ZF

=0 forward

= 10(55.5) - 4H = 0

= 555/4 = 139 kips

(

H each corner bolt detail 2-14

~

ANALYSIS BOLT LOADS:

USE (4) - Ik" DIA. A325 x BOLTS EACH LOC.

AXIAL TENSION = 182.3/4 = 45.6 KIPS PER BOLT SHEAR = 139/4 = 35 KIPS PER BOLT ALLOWABLE STRESSES FOR A-325 TENSILE ULTIMATE = 105 ksi TENSILE YIELD = 81 ksi SHEAR STRENGTH = 47 ksi RESULTS 3/4" REINF. PLATE WELDED TO 96 IN SQ'. BASE PLATE.

REFER TO DETAIL J OF DWG. 1-298-101 FOR WELDS N,

,/

/

N

\\

CAPACITY = 7.42 KIPS /IN WEL

\\

'N k

EFF 7.42/2 = 3.71 K/IN RUNNING INCH AT ALL BOUNDARIES.

2-15

(.

RESULTS BOLTS AXIAL TENSION = 142.5 K/n BASE SHEAR = 137.5/n Where n equals no. of bolts at each of 4 locations.

Try 4 - 14" DIA. A325 x Bolts ea. loc. (4 places).

TENSION CAP = 1.227(81)= 99.4 KIPS ShC%F CAi 6 1.227(47) = 57.7 KIPS o

TENSION;' COLT = 142.5/4 = 35.63 k SAY 36 K TENSION SHEAR /BOL. = 117.5/4 = 34.38 k SAY 35 K SHEAR CK COMBINED L'AD.

AISC SPEC.1.6. '

F = 50 - 1.6f 16 40.0 t

y USING Ys VALUES

[

47 ksi allow.

i. - 100 - 1.6f s6 81 y

e 2-16

n.

s.

AXIAL STRESS = 36/1.227 = 29.3 ksi f = 35/1.227 = 28.5 ksi v

SUBSTITUTING F = 100 - 1.6(28.5) = 54.4 ksi > 29.3 ksi t OK t

BRG ON A36 PLATE 35k 0.75(1.25)

= 37.33 ksi

(,40.5 k:1

.", OK PRYING ACTION 21-300 BODY WALL 3/4"

~

>(

>s 9"

3" 3" 2' 6"

BASE PLATE CONSIDER 12 IN EFFECTIVE GUSSET LD/IN = 142.5/12 = 11.9 K/IN TRY BASE PLATE 4 INCREASED TO 1.5 IN THK.

l 2-17

LDING DIAGRAM P = 11.9 K/IN s

3 - 3/8 - 1/16 = 2 9/16 IN N

s

/

\\

s 1"

n F=6P/2=35.7 k N

s a

SAY 36 k y

100b(db)2 - 18W(tr)2-FtQ Q

(

Q=F 70a(db)4 + 21W(tf)(

~

= 35.7 100(2.56)(1.25)2 - 18(6){1.5)2

, 70a(1.25)' + 21(6)(1.5)'

.y.

I a= 3 IK EFFECTIVE 9.2 KIPS Q= 35.7 400 -243

=

328 +283.5 0.26 M2 = 9.2(3) = 27.6 IN-KIPS Mi = 45.2(2.56) - 9.2(5.36) = 64.6 IN-KIPS (GOVERNS) bend = 64.6(6) / 6(1.5)2 = 28.7 ksi< 36 ksi

.. OK f

4 2-18

2.5 Standards for Type B Packaging N/A for CNSI Model 21-300 2.6 Nornal Conditions of Transport 2.6.1 Heat An evaluation was performed to consider the affects of increased ambient temperature on cask integrity. For this evaluation, an ambient temperature of 1300 is assumed and an additional 1000F conservatively added to the surface temperature to account for solar insolation.

Assuming that the cask is in an equilibrium, stress free condition at 700F, this results in a net temperature change of 1600F to induce stesses in the cask wall as a result of differential thermal expansion between the steel and lead.

The following analysis shows that this condition will cause the lead to load the outer shell in tension by 3784 psi which is well below the 36,000 psi yield strength of A-36 steel.

2-19

ANALYSIS FOR INCREASED AMBfENT TEMPERATURE r.

ITEM 6 GE0 METRY 1/8" STL ITEM 4 ITEM 7 LEAD 1" 3/4" STL f

\\

)

i ITEM t

RAVG(I")

WALL i

6 0.125 41.56

\\

4 1.0 42.13 N

4 7

0.75 43.0 4 11s" 41 5/8" 42 5/R"

.(.

43 5/8" s

ALL RADII FROM CENTER LOADS AT = (130 + 100) - 70 = 160 F Assume temp. 100 > ambient.

W ATR = AR 0

" LEAD =16.1(10 )/ F

= 6.5(10-6)j p o

c(STL h

THUS LEAD WILL LOAD OUTER SHELL IN TENSION.

(

2-20 o

2R

= 16.1(10-6)(160)(42.la) = 0.109 INCHES LEAD 4RSTL "

THIN SHELL THEORY SINCE t/R4,0.10 ANALYSIS AT EQUILIBRIUM:

EXTERNAL BEARING PRESSURE (q)

ACTING ON LEAD LINER IS EQUAL TO BEARING PRESSURE ACTING ON INNER SURFACE OF OUTER STEEL STL 1/8 SHELL.

R

'J I

LEAD 1"

(3 ROARK & YOUNG -Sth ED TABLE 29 CASE lb f

= qR/t

+ sign for INT.

HOOP

- sign for EXT.

8RG(43)/0.75 = 57.33 qBRG.

f

9 STL oggg = -qsRG92.13 m = -42.13 esas _

f Is 2-21 2

~

DEFORMATION AR = qR /Et

+

INT q (STL)

EXT q (LEAD)

STL," 98RG(43)2

= 85(10-6) 9 AR 8RG 6

29(10 )(0.75)

ARLEAD " ~98RG(2.13[=-887(104)qBRG 6

2(10 )[y)

COMPATIBILITY ARSTL = ARLEAD AT R= 42 5/8 IN. INTERFACE SUBSTITUYING:

85(10-6)98RG + 0.045 = -887(10-6) q3g+ 0.109

^

= 0.109 - 0.045 D*

^

q8RG (887 + 85)10-6 (s!

RESULTS f

= 57.33(66) = 3784 psi 4

YIELD OK TL f

= -42.13(66) = 2780 psi tggg

(_.

2-22

2.6.2 Cold An evaluation was performed to consider the ef fects of reduced ambient temperature on cask integrity. An environmental temperature of -300F was considered which results in a temperature dif ference of 1000F below the 700F stress-free condition. The 1000F temperature change causes a differential thermal contraction between the lead and inner steel wall. This results in a compressive loading on the inner wall of 10,725 psi which is below the yield strength of 30,000 psi for A-304 steel.

2-23

ANALYSIS FOR REDUCED AMBIENT TEMPERATURE p

GEOMETRY l

LEAD 1" R

= 41 9/16 "(AVG)

STL R

= 42 1/8" (AVG)

LEAD STL 1/8" RST LEAD s

LOADS 4T = -100 F ASSUMED DUE TO TEMP. CHANGE AR = *4TR

=16.1(10 )(-100)(42.125)=-0.068IN ARLEAD

=5.78(10-6)(-100)(41.5625)=-0.024IN.

4RSTL

+ Thus lead will ext. compress STL inner liner.

Use thin shell theory since

= 0.0024RLEAD 0.1R tg

(

2-24

i i

ANALYSIS EQUILIBRIUM EXT q ON STL 1/8" THX INNER SHELL INT q ON LEAD f

= qR/t

+ IF INT. LOADING (LEAD)

H00P

- IF EXT. LOADING (STL) f

-98RG(41.56)

= -332.5 qBRG j

STL 0.125 f

=9p3p2.125)

= 42.125 qBRG oggg 3

1 DEFORMATION b R = qR /Et

( NO DIRECT END LOADING EX. TEMP.)

8RG@l.56[

=-477.qBRG(10

)

AR

~9 STL 6

29(10 )(0.125)

ARLEAD " 98RG(

)

= 88 (10 ) qBRG 6

2(10 )(1) k

)

2-25

COMPATIBILITY AT R= 41 5/8 IN.

ARSTL = ARLEAD SUBSTITUTING

-477(10-6) 98RG - 0.024 = 887(10-6)98RG -0.068 q,gg = (0.068 - 0.02O (10 6)

= 32.26 psi 887 + 477

+ SAY 32 psi.

RESULTS f

= -332.5(32) = 10,725 psi 4".

YIELD

.'. O K STL f

= 42.125(32) = 1360 psi LEAD STABILITY CHECK STL INNER SHELL 1/8" THK qBRG = 32 psi EXT ROARK & YOUNG - 5th ED TABLE 35 CASE 19b 2

3 2.

Et -

4 1

t q' = 0.807 1r 2

2

= 77.86(0.06)=4.6 psi (1,7 )

r Not valid over bonded construction!

2-26 A

i 2.6.3 Pressure An evaluation is presented which considers the effects of a reduced ambient pressure of 0.5 atmosphere on cask integrity.

This is equivalent to an internal over pressure of 7.3 psi.

The following analysis verifies that stresses in the cask bottom, walls, and lid bolts are acceptable.

The analysis also shows that the specified bolt torque at assembly is sufficient to maintain a leak tight seal under this reduced pressure condition.

)

2-27

REDUCED AMBIENT PRESSURE ANALYSIS GE0 METRY s

--+- INSIDE DIMENSIONS ARE SHOWN.

110" P = 7.3 psi EFFECTIVE INTERNAL e

PRESSURE 4

83" i

3 LOADS AMBIENT ATMOSPHERIC PRESSURE = 0.5 ATM ANALYSIS BOTTOM CHECK ASSUMING UNSUPPORTED EXCEPT AT WALLS.

86"

'l

'l l

l 4

4 4

4 I

I ROARK & YOUNG - 5th ED TABLE 24 CASE 10 SAY HALF-FIXITY AT W,6.LLS.

('

2-28

~

K

= -0.0637 - 0.01563

= -0.04 yg 2

(

Y = -0.04 qa#/D q= 7.3 psi c

a= 43 in.

6 6

2 3

29(10 )(0.75)3/12(1-0.09) = 1.12(10 ) LB-IN /IN D

,g

-O 3

= -0.89 IN HALF 0.75 IN.

Yc =

i i0

.'. NOT VALID CALCULATE COMPOSITE SECTION L

1/8" STL I

6 9( 0 )

E

=

STL

07"W 1" LEAD 6

E

= 2(10 ) p34 LEAD s

Y

~~

J J.

1 7, BOT n = 2/29 = 0.07 3/4" STL

^-

g 3

AY,g7 = 1(0.75)2 1(0.125)(1.8125) = 0.51 IN

/2

+

Y

= 0.51/0.875 = 0.58 IN gg7 2

A

= 0.07(1) = 0.07 IN ttgn 3

AY = 0.07(1.25) = 0.09 IN

'~

= 0.60 IN YBOT = 0.54 + 0.07 0.875 + 0.09 s

2-29

+9+)

b

//[gj

g. g, t t{

$>//

IMAGE EVALUATION k//77

/ 4

/ j b (g,

T TEST TARGET (MT-3) y,,,

+

l y l[ M u

s " He i.8 1.25 1.4 1.6

=

150mm 4

6" k*%

/A

<>r;a,)/7/

sp$L'y&

a4%

y 0

4 i

k x-

m g

p*d k//,[> #s

///j//

M/,

IMAGE EVALUATION 4

/

TEST TARGET (MT-3) 1.0 lf M M i m p'2 2 Ea I.I b" !!S l.8 1.25 1.4

'l i.6 4

150mm 4

6" N 'hof,

&u%&

f4*

., %.,,,,7//// \\

'g 4 +* 4 0

i

\\

es e

1(0.125)(1.8125 - 0.6)2 + (0.75)3/12 + 0.75(0.375-0.6)

INERTIA =

4

= 0.26 IN /IN 3

EQUIVALENT t =

12(0.257)

= 1.456 IN N

gUSEFORSTIFFNESSCOMPUTATIONS

. 56[

2900hl.E6[

= 8.2(10 ) LB-IN /IN 6

2 D= 12(1 - 9) 12(1-0.09)

-0.04(7.3M43)4

= -0.12 IN 4

1.456/2.. VALID Yc =

6 8.2(10 )

SMALL DEFLECTION THEORY FORMULAE 0.20625 + 0.08125

= 0.144 c

2 Mc = 0.144qa2 = 0.144(7.3)(43)2 = 1940 IN-LBS/IN

,Mc 1940(1.8125 -0.6)

= 9515 psi f

BEND I

0.26 LESS THAN ALLOWABLE

., OK 2-30

l WALLS-ROARK & YOUNG - 5th ED f

=

AXIAL TABLE 29 CASE Ic 2-9 4R= lt 1-CHECK INT. STL ONLY

{

4Y " L (0.5 -9)

AXIAL STRESS = 7.3(41.56)

~

RY Lt 2(0.125)

= 1213 psi Obviously (

7.3(41.56)2(1-0.13)

0.003 IN SMALL *.0K 2R

6 29(10 ) (0.125) 7.3(41.55)(110)(0.5-0.3)

0.002 IN SMALL 1.OK oY

6 29(10 )(0.125)

I LID BOLTS BOLTS (18) k+,

4 n

L 4

y a

i.

PINT.

WALL BODY BOLTS (12) 2-31

.i. -

SMALL LID :

Q = qa/2 =7.3(13)/2 = 47.45 LBS/IN_

TT(13)2(7.3) 18

= 215 LBS.'. NOT CRITICAL LOAD / BOLT

=

CHECK CONTINUITY AT BOLT:

M, = -qa jg, 7,3(33)2/8 = 154 IN-LBS/IN 2

UD

, U(33)

= 5.76 IN

'11i 18 LOAD / BOLT = 5.76 (154) = 887 IN-LBS I

3/4" ITEM 8 BEARING / PRYING ARM = _1 1/8" FORCE = 887/1.125 = 788 LBS_

.,NO PROBLEM 33k" DIA.

('

BOLT CIRCLE 3/8" WELD = 5.57 K/IN

!. CONTINUITY MANINTAINED 2-32

-r.

Primary and secondary seals consist of silicone rubber and flat They are compressed by imposed neoprene gaskets respectively.

displacements.detemined by torqued, or preloaded, lid bolts and Proper gasket mechanical stops reacting the bolt preload.

perfomance is assured provided the bolt and mechanical stop Primary preload is maintained during the reduced pressure event.

lid bolts are torqued to 200 ft-lbs. and secondary lid bolts are torqued to 50 ft-lbs. The adequacy of these preloads is demonstrated by the following analysis:

Primary 1.id Bolts (12 each, ik" - 7UNC)

T = KDF

T = torque, in-lb.

K = torque coefficient. 0.18 D = Nominal bolt diameter, in F = Bolt Preload T = 200 ft-lbs (12) = 2400 in-lbs F= T = 2400/(.18) (1.25) = 10667 lbs/ bolt W

Since the bolts are installed at 45, the effective preload per 6'

\\

bolt is:

Fa = F cos 45 = 7542 lbs/ bolt The internal pressure of 4 atmosphere produces a bolt load of:

2 A

A=

D Pa = g _

N 4

D = 77 + 5/8 = 77.625 p = 14.7/2 psi = 7.35 psi N = 12 bolts p,, (7.35)

(77.625)2 2899 lbs/ bolt

=

12 4

1 2-33

)

i

~

' l..

.... i

Therefore, since the pressure load, Pa, is significantly below The the bolt preload, the integrity of the seal is maintained.

~

sealing margin of safety is:

M.S. = Fa/Pa - 1

= 7542/2899 - 1 = +1.60 Secondary Lid Bolts (18 each, 3/4" - 100NC)

Tlie torque is:

T = 50 f t-1bs (12) = 600 in-lbs The bolt preload is:

Fa =

= 600/(.18)(3/4) = 4444 lbs/ bolt The pressure load per bolt is:

12 4

Pa = P

D = 27.5 in

~

N erf

,_(7.35) 4 (27.5)2.

243 lbs/ bolt 18 Once again, the integrity of the seal is maintained because the bolt preload force exceeds the pressure force by a wide margin.

The sealing margin of safety is M.S. = Fa/Pa - 1

= 4444/243 - 1 = + 17.3 l

2-34 O

2.6.4 Vibration The following analysis determines the resonant frequency of the cask and shows that this value is higher than the vibration frequency normally encountered for truck suspension systems and therefore it can be concluded that vibration 4

normally incident in transportation will not af fect the cask.

2.6.5 Water Spray The model 21-300 is fabricated of materials (steel and lead) which are not affected by water spray.

9 J

i 2-35 l-

\\

VIBRATION ANALYSIS i

ro, 86" s

~

GEOMETRY

?

113"

~.

BOLTED DOWN TO TRUCK BED LOADS Consider as cantilever beam.

ROARK & YOUNG -5th ED fN*

Tr%'

TABLE 36 CASE 3b FUNDAMENTAL MODE:

= 3.52 2-36

b.

ANALYSIS 3/4" THK STL i

I g 1" THK LEAD 6,,

y

]

/8" THK STL EI=2Rf10)ftRhg t = 6.34(1012) tg,3g?

6 e

9 = 32.2(12) = 386.4 IN/SEC.

l'~.

W = 55,500 LBS

,t l

RESULTS 6.34(1012)(386.4) 98 Hz f,3.52 N

55,500(113)3' This is well above the 1-20 cps range for truck suspension systems.

.~. OK Since resonance avoided.

W 2-37 J-- -

2.6.6 Free Drop This section presents the analyses performed which verify f

that cask integrity is maintained when subjected to a free drop from one foot. ' Analyses are performed with the cask in l

the following orientations:

2.6.6.1 End Drop (bottom) 2.6.6.2-Side Drop 2.6.6.3 Corner Drop 2.6.6.4 Structural Analysis of Load Distribution Pallet 2.6.6.5 Load Distribution Pallet and Internal-Shield 2-38 i

2.6.6.1 ANALYSIS FOR END DROP - BOTTOM DOWN GEOMETRY SECONDARY LID 36" 0.D.

ar--

T

,1 4

26" j

L10" 117h" 83" t

E\\

i I

O 8' SQ. BASE PLATE

~

86 3/4" TYPICALCONSTRUCTION(80T.ANDWALLSCYL.)

1/8" STL INNER 1" LEAD L1D IDENTICAL EXCEPT

(

k" STL INNER PLATE.

i 3/4" STL OUTER 3

2-39

/

~

LOADS MAX GROSS CASK WEIGHT = 57,450 lbs.

L ENERGY IMPACT = 57,450 (12) = 689,400 In-lbs ASSUMPTIONS:

1)

PLASTIC FLOW 2)

ALL ENERGY TRANSMITTED THROUGH BODY WALLS, 3/4" THK 86" MEAN DIAMETER.

VOL. STL REQUIRED = 689,400/36.000 = 19.151N AREA STL CONTACT BODY =$(86)(0.75) = 202.63 IN 0.094 IN 880DY = 19.15 / 202.63

=

GPLASTIC = h/S = 12/ 0.094 = 127.6

..USE 130 ANALYSIS

. LID WT. SECONDARY LID = 550 LBS.

ANNULAR MAIN LID = 3450 LBS.

CHECK WT. = 490(0.875)

+

710(1)

= 0.25 + 0.41 = 0.66 psi 1728 1728 SECONDARY LID b

T2'75)*

2

.95 iN oK A37,

(1)

= 0.69 osi DEAD WT.

N LID =

+

2 2

2 h!NLID=

(83 -26)=4880IN OK 2-40 i

l d.

PROPERTIES:

ESTL

= 15 ELEAD SECONDARY LID I

2AYTOP = 0.75(0.375)+ 1/15 (1.25) + 0.125(1.8125 3

3/4" STL

= 0.59 IN y

TOP J

A = O.75 + 1/15 + 0.125 = 0.942 IN Y

= 0.59/0.942 = 0.628 IN TOP COMPOSITE SECTION 1/8" STL s.

1/15(1.25-0.625)2 3

3 0.628 (0.75-0.628)3 1

3 4

3

+ 15(12)

+

ICOMPOSITE =

f.

PLATE 0.125(1.8125-0.625)2

+

4 0.29 IN /IN

=

COMPOSITE PLATE ROARK & YOUNG - 5th EO K

= -0.06370 y

~

TABLE 24 y = 0.20625 CASE 10a g,.0.09615 2=0.20625(0.66)(130)(13)2 = 2991 LB-IN/IN Mc =

qa e

A WT. AT IG G FACTOR EFF. RADIUS f8END = MC/I = 2991(1.378)/0.29 = 14.128 psi 4 YIELD STL k

2-41 t

12(0.290) 1.52 IN REFERENCE ONLY t

=

EFF STL 6

0 6

D.= Et

, 29[10 )(1.52)3 29(10lt(0.29) = 9.24(10 )LB-IN/IN 3

12(1 - e)

L2(1-v) 0.9 a

~0]2 i!O 4

= 0.017 IN SMALLI Ye = ge ga /D

=

0.09615(0.66)( 30)(13)2

= 1.96(10-3) RAD 3

ea = x qa /D =

ea 9.24(10 )

,33 o YIELD MOMENT 3/4" STL PLATE:

My = 36,000(0.75)2/6 = 3375 LB-IN/IN NO ROTATION (f

I

= 2991(1.12)

= 770 psi

{ VIELD LEAD LEAD MAX 15(0.29) 0.66(1305(13)(0.628)3

= 379 psi < 1000 psi q = VQ/I

=

2(0.29)(2)

MIN. VALUE DEMONSTRATED THUS SECONDARY LID OK DUE TO 130 G IMPACT.,

(BOTTOMDOWNFLATIMPACT) e 2-42 O

N MAIN ANNULAR LID 36" J

'_ /

\\

i r-BODY BOLTS 26" s

ROARK & YOUNG - 5th ED LINE MOMENT UNIFORM LOAD TABLE 24 LINE LOAD CASES 5e 2e,1e a

7 4

i i

4 4

3 w

o

)

s Mo = qa /8 LB-IN/IN AT SECONDARY LID BOLT LOCATIONS 2

~

RADIUS = 33.25/2 IN.

qACTUAL = 0.69 psi AT 1G W = 550

= 550

= 5.27 LB/IN AT 1G w(33.25) 5DBOLT

\\

J 2-43

c VALUES :

b/a = 26/83 = 0.31 L VALUES:

r /a = 33.25/83 = 0.40 g

LINE LOAD W Cl 3

l6 Yb = -Wa /D

-L

~

g 3

L3 = 0.02229 3 = 0.76561 c

L6 = 0.099258 c4 = 1.361667-0.7651(0.099258)

- 0.02229 = 0.034 1.361667 MrG * ~N" '9 -

16 C

7..

4 y

4 = 1.361667 L6 = 0.099258 c

L9 = 0.297036 c7 1.380167 1.380167(0.099258)

Cl L

76

= 0.297036 9

1.361667 84

= 0.196 2-44

UNIFORM LOAD q KYb = -0.0132 r, = b K

= -0.1135 b/a = 26/83 = 0.313 Mra 2

4 Mra =

qa Yb = K qa /D ra Yb LINE MOMENT, Mo

-0.66( 30)(13)2

-1812 LB-IN/IN SECONDARY LID PLATE Mo.

BENDING DUE TO BOLTED CONNECTION.

gt

.s 2

35 Yb = Moa /D

~L 2

g4 L2 = 0.136697 c3 = 0.76561 L5 = 0.42 c4 = 1.361667 Cl 0.76561(0.42) - 0.136697 = 0.099 l5

.t c

2

,1.361667 4

cL75

'8

O Mra = Mo L8-c4 1.330167(0.42) = 0.280

~'

~

8,cL75 = 0.706 -

- t 1.363667 g4 2-45 l

MAIN LID STIFFNESS __

1AYTOP = 0.75(0.375) + 1/15 (1.25 w.

TOP 3/4" STL NEUTRAL AXIS 2

-N N

0.75 + 1/15 + 0.25 = 1.067 IN A

=

EQ.

Y

= 0.833/1.067 = 0.781 IN TOP t

lk'STL p

3 3

3 0.75 1

0.25 0.25(1.125)2

+T

+

12

+

3 ICOMPOSITE =

SECTION

= 0.481 IN /IN f

1.794 IN 12(0.481)

=

tEQ. ST.

6 2

3 29(10 )(0.481)_ = 15.33(10 ) LB-IN /IN 6

=

D = Et 0.93 12(1 -v9 Yb = -0.034(5.27)(130)(41.5)30.0132(0.69)(130)(41.5)4 D

D

_0.099(1812)(41.5)2

= -0.358 IN / HALF THICKNESS OK 2-46

Mra = 0.196(5.27)(130)(41.5) - 0.1135(0.67)(130)(41.5)2 - 0.28(1812)

= 23,614 LB-IN/IN 38,342 psi (f,ggg)3/4"Sn = 23,614 (.781)

=

PLATE 0.481 23,614(1.22) 59,894 psi (fBEND)1/4"STL

=

PLATE 0.481 3175 psi 23,614(.97)

(fLEAD) MAX

=

4 15(0.481) q = VQ/I AT BOUNDARY 2

2 V=0.69(130)(41.5 - 13 )

+

5.27(130)(33.25) 2(41.5) 83 Y = 1953 LB/IN 1953(0.75)(0.375) 1143 psi

=

q, 0.481 The above calculational method used to detemine bending stresses is very conservative. This is demonstrcted by the results of a drop test of a CNSI 14-195H Cask (NRC Docket 71-9094) which has a geometry very similar to the 21-300. That test dropped an actual fully loaded cask from a distance of one foot, onto its lid. Using the above calculation method, the bending strcsses in the inner wall of the cask bottom were determined to be 65,948 psi.

However the test result demonstrated that no pemanent defomation of any kind actually occurred under these conditions.

Therefore, if one conservatively assumes that the material was on the verge of yield, then the stress could be estimated to be 36,000 psi. (F y for A-36).

t A conservatism factor can now be defined as:

36,000

55

=

65.948 Applying this factor to the above results:

1 i

(f8end) 3/4" STL Plate = (38,342)(.55) 21,088 psi

=

(f8end) 1/4" STL Plate = (59,894)(.55) 32,941 psi

=

The structural requirements for the primary lid are therefore satisfied.

2-47 i

2.6.6.2 ANALYSIS OF SIDE DROP S

GEOMETRY 21-300 CASK s

/

DIA. = 86 3/4" 0.D.

Cu AXIS N

(

LEhGTH = 117 "

END VIEW I

R a

M.:.

SHADED AREA = R (g, s ne )

2 1

2-48 P

-,-,,,-,--,---.r,-

--y--e

,,,,,y-_.-.-._

ENERGY ABSORBED BY THE FOLLOWING:

1) DEFORMATION OF END PLATES (LEAD AND STL)

2) MOVEMENT OF LEAD (CYL. LINING)

3) STL SHELL DEFORMATION (CYL. ONLY) sine (2 - cose)- e E

= RtSTL'IYIELD STL EXT SHELL ONLY REF: CASK DESIGNER'S GUIDE, ORNL-NISC-68 FEB.1970 by L.B. SHAPPERT (2.12)

~

LOADS Wh = S5,500(48) = 2664 IN-KIPS

['

EQUATINGENERGYTO(3)ITEMSABOVE:

+Rfead Wh=2RfND HGT f I'~

)

t I

e - sin 2e LEAD STL YIELD 2

PLATES

, sine (2-cose)-e

+R t

HGT f STL STL YIELD i

BDY STL L

COMBINING TERMS:

LEAD \\+ F 50) 2R R

I Wh F(e)

AVG AVG

=

2 t

R Hf

STL

STL (#STL)

STL AVG STL YIELD t

2-49

^ $4 l

Wh 55.500(45)

= 0.0203 t

R f

0.75(43)(113)(36,000)

STL gg STL 11 ELD Determination of the half angle subjected to crushing is an iterative procedure.

Evaluation results in:

8-1/2 0

=

q 2-50

g, ANALYSIS i

0 = 17 6

1

/.

I I J bWIDTH' FLAT'

-5 = R(1-cos0)

= 43(1-0.989) = 0.47 IN SAY 4"

' FLAT' = 2Rsine = 2(43)(0.1478) = 12.71 IN SAY 12 3/4" SINCE LEAD THICKNESS = 1 IN. ASSUMPTIONS ARE VALID.

2 IMPACT AREA = 12.75(113) = 1441 IN STL ENDS 2

AREA = 12.75(0.75)(2) = 19.13 IN EACH END (FORCE)STL = 36000(19.13) = 688.5 k SAY 690 k

((

2-51 y

LEAD LINING 2

AREA = 1220 IN 10,000(1220) 12.200 KIPS (FORCE) LEAD

=

232 SEEMS HIGH.

12,200 + 690 NO. G's

=

55.5 SINCE IMPACT AREA VERY SENSITIVE TO VOLUME REQ'D, RECALCULATE VOLUME USING LEAD DYNAMIC STRESS = 10,000 psi HAVING ALREADY SHOWN DEFORMATION COMPATIBILITY.

{10 2R, R EAD 2f4 43 STL (STL J "

G H

t

)

e = 6.5

(

FLAT = 2Rsine = 2(43)(0.1132) = 9.74 IN SAY 9 3/4 IN.

2 113(9.75) 1102 IN IMPACT AREA

=

0.2764 IN SAY % IN 43(1-0.9936)

R(1-cose) 5

=

3

'~5i" '

2 0.001(43)2(113) = 203 IN R HGT VOL.

=

2

(

k 2-52

a a_,

13.12 ksi (W,)EFF.

3

=

13.120(1102) 260

=

9LD,

55,500

---+- USE 250 RESULTS SMALL LID *,

500 LBS WT. LID

=

i 4 33" BOLT CIRCLE 26.,

A s

a e

(18) 3/4 - 10 UNC-28 SHEAR = 250(500) = 125 k SHEAR LOAD / BOLT = 6945 LBS 2

AREA = 0.442 IN SHEAR STRESS PER BOLT = 15,700 psi f[I ALLOWABLE =_(0.3)(F ) = (0.3)(57,000) = 17.000 psi y

THEREFORE SECONDARY LIO BOLT SHEAR STRESSES ARE ACCEPTABLE 2-53

~

A BRG. ON 3/4" A-36 PLATE = 27.3 k > 6.95 k WELD: 3/8" FILLET ALLOW.=tT(0.75)(0.928)(6)=13.12k 6.95 k.. OK CASK BODY

/.r~'sN tF._ CASK /IN. = 30,000/113 = 265 LB/IN

',e-,sN ROARK & YOUNG - 5th ED TABLE 17 CASF 13

~'

Y

,ll tb5

= 0.98 LB/IN g

/

V = 265/2tiR = 21T(43)

SAY 1.0 LB/IN M=(3/2)WR

= 1.5(1.0)(43)2 2

= 2773.5 LB-IN.

fBEND =

j

' = 10,700 W

( MD OK u

2-54

2.6.6.3 ANALYSIS OF CORNER DROP e..w,

. From the drawing (1-298-101 Rev. K) it can be seen that the top lip of the cask consists of an external skin of 3/4 inch steel plate and a heavy solid steel bar (2h" x 4").

A corner drop anywhere along the top edge will result in local defomation and the associated energy absorbtion.

Using the simplified volume displacement concept for energy absorbtion, the acceleration experienced under a corner drop condition can be determined.

The energy can be detemined as follows:

3 D Fc (sin 0-s n 0-Ocos0)

KE = (Vol) (Crush Strength)

=

Where:

6 = 92 in Fc = 36000 psi (A35)

L = 117k in k,..

W = 57450 lbs (30200 lbs cask + 27,250 lbs Payload) h = 12 in Solving for 0 0 = 16.5 9 4 = 38.06 Deflection is given as

= R (1-cos 0) sin d

= (46) (1-cos16.5 ) sin 38.06

= 1.17 in Impact area is given as:

A=r2(0-sinecos0)/coso'-

A = 462 (165" - sin 16.5 cos16.5 ) / cos 38.06'

. ((

l 2-55

2 A = 42.08 in Acceleration is given as:

Ag = (42.08 in 2) (36000 psi) / (57450 lbs)

Ag = 26 g's

~

Therefore, assuming the impact takes place on a corner the acceleration will be 26 g's.

/

,A

\\\\\\\\\\\\\\\\\\D The axial. load felt by the closure bolts will be the combination of the payload and lid weight acting in the axial direction.

P = (27250 lbs payload + 6000 lbs lid) A cos 38.06' A

g P = (33250 lbs) (26 g's) (cos 38.06')

g P = 680677 lbs g

This load will be reacted by 12-1k diameter Grade 8 bolts for a load per bolt of:

= (680,677 lbs /12 bolts) / cos 45' Pb P = 80218 lbs / bolt (tension) b 78,360 psi Tensile Stress per Bolt = 80.218 lbs

=

1.0237 in.2 Minor Area Allowable Stress = 130,000 psi

!,k Therefore Primary Lid Bolt Loading is ar.ceptable.

2-56 l

..L-.. -.

6 Also, in evaluating the effects of a corner drop, the bending stresses in the primary lid are considered. This analysis

. takes credit for the use of a load distribution pallet (CNSI Dwg. C-144-D-0006).which concentrates the resultant loading from the cask contents onto the outer portion of the primary lid.

I

9 LINER LOAD DISTRIBUTION PALLET 6"

SPACER BLOCKS

(

f 2-57 S

The lid is composed of a one inch thick lead plate sandwiched between two steel plates. As noted, the assembly is bonded together thus causing it to act as a single composite plate.

Nnte that The equivalent thicknen is calculated :, fc11ews.

the stiffness of the lead has been conservatively eliminated.

[N

\\lNNEA

\\

\\)

.50

\\\\

MHELL \\

\\

7

\\

h LEAD I

1.0 PRIttARy LID s

OUTER ELL

.75 O's\\

s A

Y Ay Io 1

.750

.375

.28125

.0352 2.

.50 2.00 1.00000

.0104 1.25 1.28125

.0456 y=EAy/.tA=1.023 I = 1, MA d,2 x

n 4

I, =.600 in This is equivalent to a stcel plate of the following thickness:'

3 4

I = bt /12 =.600 in x

t=3 /(.600)(12)

I t = 1.92 in e

2-58

==

-=

I conservatively assume that the impact is reacted by the pallet which inturn applies a concentrated point load at "A".

From Roark, Fourth Edition, Case 3 Page 216, stress in a circular plate is given as:

W W

"A" U

r I

h i

-r s

s o

s c

- (m-1) r,2 2

2 2

(m + 1) in a/r + (m-1) r,2

/2a

/2nmt

/2r f = 3W Where:

W=PA = 680677 lbs a=1h=3 a = 41.5 in, r = 37.5 in.

r,= 37.5 in, t = 1.92 in.

f = (3) (680677) f4 in 41.5 + 1 -2 (37.5)2/2(41.5)2/24f(3)(1.92)2 L

FT r

f = 17649 psi Therefore, it can be concluded that the lid can react the bending stress imposed by the payload for a corner drop condition.

5-m i

2-59 l

l 2.

Evaluation of Cask bottom during corner drop is as follows:

1

.50

>N N

N x

x x

v 1

k LEAD l

GEOMETRY l

1.0 h

BAS LAT l.

t

REFERENCE:

Dwg. 1-298-101 Detail J (Rev K)

\\

2-60

.m..

,m.

.A Y

AY Io r-(%

1

.75

.375

.28125

.0352 2.

.50 2.000 1.00000

.0104 1.25 1.28125

.0456 i =2Ay/2A = 1.28125/1.25 = 1.025 2

I = I, +ZAd I =.0456 + (.75) (1.025.375)2 + (.25) (2.0-1.025)2 4

I =.6000 in This is equivalent to a steel plate of the following thickness:

3 I = bt /12 =.600 x

t=3/(12) '(.60) = 1.92 in

{%

From Roark, Fourth Edition, Case 6. Page 217 maximum stress in a circular plate under a uniformly distributed load is given as:

2 S = 3W/4 t r

Where:

W = 680677 lbs t = 1.92 in S = (3) (680677)/4TT(1.92)2 r

S = 44,080 psi r

This stress is well below the 75,000 psi allowable for stainless or the 58,000 psi minimum for the carbon steel plate.

l 2-61

2.6.6.4 Structural Analysis of Load Distribution Pallet The load distribution pallet is effective in providing a rigid load path around the periphery of the cask lid with the cask loaded in the 21-55 gallon drum configuration. This pallet design also provides the following operational advantages:

(1)

Provisions for the stowage of cables on top of the pallet, thereby minimizing hook-up time, substantially reducing personnel exposure, and (2) facilitates a standard and consistent procedure for the 21 drum stack-up configuration.

An evaluation of the structural capability of the load distribution pallet is presented below.

Load Distribution Pallet (Dwg. Ilo. C-114-D-0006) d dsmk"""""%'M, n +. _

_I

_i h

.l tfeiets

~

_I I

i Load Distribution pallet.......

1,850 lbs.

A

}

Contents Illustrated...........

21 drums 750 lbs. es..........

1 1

_1 15.750 lbs.

1 3

J l

I I

Total payload 17,60 lbs.

?

_'l

^

I'

~

]

I E

21-300 Cask Loaded with 21 Drums and Land Distrioution Pallet I

1 l

2-62

_. _ _ ~

h (Upsidedown) f E 4. 0 -

=

4

/2.0 *-

l-r ~ ~. r~* * *#,

e".

a j

g.

"'~

s es

~-

I i

s e

a.s s3 s

18 Drums - Uniform line load e

.t

}

a i

s e

a a =

.s s cz==== sss e

I e

3 Center drums

>>issiasDiliniss]/iD/4 7~

Uniform load Be

-zo l

1

(

Q y m lLM

=

y isia<g ~ <<

0

-3+.5-

=

4D.5

=,

=

Three center drums - uniformily N

loading the pallet over a circular

(

area of 12.0 in, radius, p.--

l=

L -

J, 3 4. 5 f / g =,

F W

18 drums - uniformally distributed i

8I.O-0 line load 9 24.0 in, radius c...

L-J The load distribution pallet is modelled as a circular plate with fixed and loaded by the center 3 drums as a uniform load over a c

?

i line load around the plate at a radius of 24.0-in from the ce 12.0-in. radius from center.

plate as indicated above. pallet is obtained by superposing the resu I

2-63

,._.,_m

-m.

,m..,,

1.3 - continued It is evident from the sketch that conditions at the edge of the pallet are neither simply supported or fixed and are at best defined as mixed boundry conditons. For evaluating the bending stress and deflection in the central portion of the pallet, the edges are assumed to be fixed. Since 86% of the load (18 of the 21 drums) is concentrated near the edge, the primary mode of loading the edge of the pallet will be direct bearing (compression) with little or no bending. Consequently, the determination of stress and deflection at the center of the pallet is the primary consideration in the structural evaluation of the pallet.

/

2-64 I

t (Ref.' R.J. Roark Third Edition, pg.19C. Case 7)

Unifom load at center (Deflectidn: 8= 3"I""II 4a -4r*2 g, Fa.3 '2,,1 g,,33 -

t I3 o

max 16nEm t a a 34.5 in

~

r,= 12.0 in W (3)(10.08) 4(34,5)2-4(12)2(1.05)-3(12)2 e.

6, 53 16n(29X10')(3.33)2 max (6.97x10'0)f3 W = 750 lbsMrum X 3 drums

=

= 2,250 lbs, t = 1.0 in.

6=

( 6.97x10~ ) =.016 in.

max (1) l(

2 5 tress:

,,,= E I"

III"

I"*II 2

22nt o

43 _

(4.33XI.05) + 4.33 -(12)2

" I3I (4)(34.5)2

= {2 2n(3.33)

.67(2 250)

=.67 {2

=

(1)

= 1,509 psi I

~

.2-65

--...._,,__e

o Uniform Line Load 9 ro*24.0 in. (Ref: R. J. Roark, 3rd ED. PG.196, Case 8) s l

a = 34.5 in Be flectien:

4= I"I" "I]

(a! r,2)-r*2 y, a r* = 24.0 in max 2nte t-L

, g. g 3,33 6=

j3)(10.08) 1(34.52 24 )-(24) Inh max t

2n(29X10)(1148) 3 W = 750 lbs/ drum X 18 drums

= (1.469x10-6)

= 13,500 lbs.

t = 1.0 in.

(1.'469x10 ) (13.5 )

.02 in.

6 6=

(1) max 4

5 tress:

2 e=E (m+1)(21n * + %a

-1) 2 r,

sax 4Dat III (4.33)((2)(.362) +.483 -1) l

=h-(4)n(3.33) t

.0645 W = 13,500 lbs

=

2 i

t t = 1.0 in

.064(13'500) = 864 psi (1)'

1 I

2-66 j

n.

Superposing the two cases, the maximum center static deflection is then:

y8=.016+.02=.036in.

,f is indicated at the cut::t, the focus of interest in confined to the central i

Assuming the stiffness and response characteristi.cs portion.of the pallet.

of the central portion of the plate are approximated by the single degree of. freedom spring-mass model, the dynamic load sugnification at the center of the pallet when dropped in the flat and orientation 12.0-in. is then:

DLM = Dynamic toad Multiplier

-DLM = 1 +-

1+2h (Ref.R.J.Roark.3rdEd.,pg.331) 4 static

'D(MM14.

1+202) = 26.8

.036' Combining the stress due to each load.

1.509 + 867 = 2376 psi I

e

=

static

,= 2.376x26.8 = 63.577 psi c

dyaamic L For AST" 572 Gr. 65 fty = 65.000 psi d

The dynamic stress: 63,677 ftu = 85,000 psi i

I l

2-67 A

m.

2.6.6.5 LOAD DISTRIBUTION PALLET AND INTERNAL SHIELD

(.

{, Load distribution pallet and shield lid. (Dwg. Ilo. C-4

\\..

Full Height Sheild for 21-300

.[

T':D ^

Cask. (Owg. No. C-114-E-0004) s

.-M

/ [ Shoring (toholdshieldinplace t ;.y.

.' t.

' {

during transportation.

L R Q

Weichts s,

f

- s l ;

t Load distributien pallet...

r s

c s Ibs.

Shield e

8 21 drums 0 750 lbs. es.15.750 lbs.

, ' '~

Total 24,860 lbs.

,i i

(

SHIELD i

I

\\

The internal configurst' ion shown in Figure 1.2 is the same as Figure 1.1 t

i except that in this configarstion a full length shield is placed in the 21-300 cask and the contents are placed inside the shield. In the critical flat drop condition, the shield bears directly on the stiff outer portion of the load l

distrioution pallet with no effect on the central portion of the pallet. In i

this configaration the shield wall geometry and construction and configurat.fon i

welysts shall conform to the following limitations:

1)

Wall thickness shall be 1.00 in. thick steel.

2)

Weipit of drums shall not exmed 15,750 lbs.

3)

Combined weight of shield, contents (including any drum lifting slings or fixtures) and load distribution pallet shall not exceed 27,250 lbs.

4)

Shield shall be shored to prevent movement during transportation.

2-68 I

-4 2.6.7 Penetration The fc110 wing snalysis cvatustcs the Effect of a 1.25 inch diameter,13 pound cylinder impacting the cask af ter a free fall through 40 inches. This analysis conservatively estimates a maximum penetration of 0.06 inches which it much less than the 3/4 inch thick outer wall. Hence the integrity of the-package or shielding is not compromised.

l 1

1 7

4 2-69

PENETRATION ANALYSIS _

g WT. = 13 LBS I

GEOMETRY

]

J s

HEMI-SPHERICAL 40" END Ik" DIA.

h

's IMPACT ZONE DIAME1ER = 86 3/4"

(-,

e LENGTH = 117k" i

LOADS ENERGY = Wh = 13(40) = 520 IN-LBS 3

VOL. STL = 520/36.000 = 0.0144 IN l'

r = RADIUS OF 13 LE CYLINDER 1.25

= 0.0145 r/k = 2(43)

R 21-300 BDY.

or R/r = 69

\\

2-70

a..

SINCE R/r VERY LARGE CONSIDER VOLUME AS PORTION O BY PLANE SURFACE.

2 VOL. SPHERICAL SEGMENT =1Td (r - d/3) d = depth of penetration into cask outer surface d = _0.0884 INCHES CHECK VALUE:

n(0.884)2{

0.0884 ) = 0.0144 0.0146 ~ 0.0144 CLOSE ENOUGH 2

IMPACT AREA PROJECTED = 0.32 IN FORCE = 11,600 LBS l{-

ANALYSIS ROARK & YOUNG - 5th ED TABLE 31 CASE 9 IIH00P)MEMBRANEc'O.4p/t2 2

(fgoop)stgoing = 2.4p/t 1

2-71

1.22' l

j P

0.4 J j

Y = Et

(

RESULTS

}

6060 psi CONSERVATIVE (fH00P) MEMBRANE"- (0.875)2 INNER STL = 1/8" OUTER STL = 3/4" (fH00P) BEND

= 12,400 psi (1.5) b Effective Thttkness

(

COMBINE 4 YIELD

l. OK CASK BCDY 1.22' 6)(0.75)

\\

/

4. THICKNESS SMALL

.. OK 1

2-72

~ ~ ~

4 J

t_A.

m

_.2..

4 a

..A 2.6.8 Compression The model 21-300 weighs in excess of 11,000 pounds and therefore is not subject to this condition in accordance with 10 CFR 71.71 (c) (9).

2.7 Hypothetical Accident Conditions Not applicable for Model 21-300 2.8 Special Form Not applicable for Model 21-300 2.9 Fuel Rods Not applicable for Model 21-300 t

2.10 Appendix Table 2-1 Summary of Characteristics of Major Cask Components 2-73

TABLE 2-1 Summary of Characteristics of Major Cask Components Component Dimensions Material.

Item No. (2)

Cask Walls -

Outer Shell 3/4" thick A516 (I) 7 Shield Region 1" thick lead 4

Inner Shell 1/8" thick A304 6

Primary Lid Outer Shell 3/4" thick A516 (I) 2 Shield Region 1" thick' lead 4

Inner Shell 1/2" thick A304 5 and 37 (Consist of 2 layer; at 1/4" thick each)

Lid OD 82-5/8" to 84-3/4" Lid ID 2b" Primary Bolts 12 at 1-1/4" dia. x 6-1/2" ~ long SAE J 429 19

~

A490 Gr. 8 Secondary Lid Outer Shell 3/4" thick A516 (I) 8 Shield Region 1" thick lead 4

Inner Shell 1/8" thick A304 9

Diameter 36" Secondary Bolts 18 at 3/4" dia. x 1-1/2" long SAE J429, 12 A307, Gr. 2 Cask Bottom Outer Shell'(baseplate) 3/4" thick A516 (I) 13 Shield Region 1" thick lead 4

Inner Shell 1/2" thick A304 24 and 35 (consist of 2 layers, one at 1/8" and one at 3/8")

(I) A516 replaced A36 for all casks fabricated after April 14, 1980.

(2) CNSI Drawing 1-298-101 Rev. K

}

2-74

3.0 Thermal Evaluation I

. A thermal analysis was perforned which considers the effect of a steady state condition including the following parameters:

1) Ambient Temperature = 1300p

2) Solar heat absorbed = 15,507.8 btu /hr-3)

Internal heat generation = 30 watts The analysis provided the following results:

0 maximum external temperature : 169.5 F corresponding internal cask' pressure = 0.56 atm These results will have no deleterious effect on the ability of the cask to perform its intended function.

The details of this analysis are presented on the following pages.

3-1 i

l

Therwel Analysis of CNSI 21-300 Transport Cask General Assumptions and Analysis Method This analysis will determine cask temperature under worst-case (nignest temperature) conditions. This assumption includes the following parameters:

0

-- Direct Sunlight (Summer 42 N -latitude)

- Ambient Air Temperature (Toc) = 1300F

- Internal Heat Load = 30 watts

= 102.4 btu /hr

- Laminar External Convection Conditions

- Adiabatic Bottom Conditions Heat Loads on the Cask Include:

- Solar-Radiation

- Waste Decay Heat (30 watts)

(102.4 btu /hr)

Heat is~ lost from the cask by the following modes:

- Convection

- Radiation to the atmosphere The analysis used to determine the maximum _ exterior temperature of the cask assumes steady state conditions where the heat load on the cask equals the heat lost.

3-2

In addition, conduction through the cask walls will be considered to determine the temperature dif ference between the inner and outer surf aces of the cask, Heat Transfer from the Cask Convection j = hA (TEXT - T c )

o From Heat Transfer (4th Ed) by J.P. Holman:

Approximated h=1.42[4_T D 1/4 (For vertical cylinders Convection

( L W/M2 oC Laminar Conditions)

Coefficients h=1.32[M)1/4 (For Horizontal Plates,

\\

L /

W/M2 OC Heated, Facing Upward, Laminar Conditions)

Converting to English Units:

h=0.25[dT 1/4 BTU /HR Ft20F For Vertical Cylinder L j

(

and similarly h = 0.23 4T 1/4 BTU /HR Ft2 0F For Horizontal Plates L) 3-3

External Surface Areas:

'hf D2

'IY (86.75)2 = 5910.6 in2 41 ft2 A op T

=

4 4

Asides = 77 DH = 17 (86.75)(109.25) = 29774.2 in? = 206.8 ft2 The Total Heat Loss is the sum of the sides and top:

0.25 (Text - 130)l/4 206.08 (Text - 130) +

O Cony.

=

L 109.25/12 0.23 (Text - 130)l/4 41 (Text - 130) 86.75/12 Radiation A otal (((Text 4 - To.4)

= CF T

Where:

([ = 0.8 (assumed for cask) 0" = 0.17 x 10-8 BTV/hr ft2 oR 4 (All Temps in OR )

i i

d RAD = 0.8 (0.17 x 10-8) (247.8) (Text 4 - 590 )

4 3 -4 l

Heat Load on the Cask Solar Radiation Total Solar Heat Absorbed:

f Si

Q=ANj Where:

AN= Nornal Area (Total) y.si = Solar Intensity Surface Absorbtivity o(

=

(0.8 assumed for cask)

The total normal area of the cask available for absorption of solar energy is a function of the angle of incidence of the energy, d)

Top COS ()

+ Asides Sin d9 AN A

A DH = (86.75)(109.25) = 9477.4 in2 Sides (Cross Section)

=

= 65.8 ft2 41 ft2 A op T

=

t 3-5 i

\\

i

~

,_9 m.

Data on Solar Intensity is obtained from ORNL-TM-2410:

Irradiated Fuel Shipping Cask Design Guide.

From this reference, a peak solar insolation of 19368 BTU /hr is determined.

This determination is based on a calculated critical angle (angle between vertical and incident solar rays) which results in maximum solar insolation resulting from a trade-off between sun intensity and cask surface area norwel to incident solar rays.

Combining this with the assumed absorptivity for this cask (0.8) yields a solar heat load of 15,508.8 BTU /hr.

Steady State Solution For Steady State:

Qin " Qout Oout con RAD

+

Qin solar

+

GEN L

(Converting all temps to OR) 0.25 (Text - 590)l/4 206.08 (Text --590) + 0.23 (Text - 590)l/4 (Text - 590)(41) i 109.25/12-86.75/12

+ 0.8 (0.17 x 10-8)(247.8)(Text 4 - 590 )

4 15508.8 + 102.4 BTU /hr

=

j i

4 3-6

Simplifying Text Let x =

51.7 (x - 590)l/4 (x - 590) + 9.43 (x - 590)l/4 (x - 590) 9.1 7.2 4

+ 3.37 x 10-7 (x4 - 590 ) - 15611.2 = 0 s

Evaluating this expression yields:

Text = 629.50R or Text = 169.50F 3-7

Conductive Heat Transfer Through Cask Walls The followino equivalent resistance network is used.

R R

CapInner STL CapPb Cap 0 uter STL e

AAf r

^

TopInner STL TopPb Top 0 uter STL M

I

-M O

M^

R Wall Wal1 Ka11 Inner STL Pb 0 uter ST M

Combining:

R y R2 R3 M

3-8

t R=

gg Where thickness, t and area, A are determined from the reference drawing 1-298-101 Rev. J.

Thermal conductivities are:

k steel = 25 BTU /hr

- ft 0F k lead = 18.6 BTU /hr - f t 0F The resulting calculated thernal resistances are tabulated below:

Steel Lead Total CAP

.0008

.0012

.002 R1

=

TOP

.0001

.0002 R2 WALL

.00001

.00002

.00003 = R3 REFF R1 R2 R3

= 2.6 x 10-5

=

R2 R3 + R) R3+R1 R2 Therefore, temperature gradient through cask wall, 8 t, is:

(104.4)(2.6 x 10-5) di T REFF

=

0.0030F

=

Therefore the interior of the cask will be at virtually the same temperature as the exterior.

4 j

3-9

Evaluation of Internal Pressure The pressure increase inside the cask due to heating is based on the assumption that material containing water is loaded at 700F and the temperature is later increased to a maximum of 1700F.

Partial pressures of water & air 9 700F are:

Pw = 0.36 psi Pa = 14.7 - 0.36 = 14.34 Partial pressures @ 1700F are:

Pw = 5.9 psi Pa = 14.34 (170 + 460)/(70 + 460) = 17.0 ps'i The internal pressure increase is:

i P = 5.9 + 17.0 - 14.7 = 8.2 psi = 0.56 ATM 4

This pressure is well within the design limits of the cask.

1 4

,,S O

a

?

3-10 m..

l mb

4.0 containment 4.1 Containment Vessel The containment vessel consists of steel-lead-steel composite walls dnd endh Of Vdrious thickness as described in Section 1.2 and summarized in Table 2-1.

The stainless steel ( A304) inner liner which is present on the cask walls, bottom and lid provides an ef fective barrier between the cask contents and the environment.

The containment vessel is fabricated using full penetration welds.

Analyses presented in Section 2.0 demonstrate the capability of the overall structure to maintain the integrity of this containment barrier during al1~ hypothesized normal conditions of transport appropriate for a Type A package as specified by 10 CFR 71.

Periodic inspection and maintenance performed using approved CNSI procedures ensures that the containment structures continue to perform their intended functions.

4.2 Containment Penetration and Closures Access to the containment is through one of two lids at the top of the container, depending on the type of contents to be loaded. The small diameter secondary lid provides access through a 26 inch diameter penetration through the primary lid for use with high integrity container type cask liners.

The secondary lid seals this penetrction using 18 3/4 inch diameter bolts torqued to 5015 ft-lbs. An elastomer type gasket maintains at positive seal at the interface between the primary and secondary lid.

The primary lid is removable to provide unobstructed access to the entire cask cavity for the loading of 55 gallon drums or similar approved containers, as well as the installation of an auxiliary i

shield and/or load distribution pallet when appropriate. The primary lid is sealed to the cask body with an elastomer type gasket and 12 1/4 inch diameter bolts torqued to 200 1 10_ft-lbs.

There are no other penetrations through the package containment.

4-1

+

i

't s.

s 5.0 Shieldina Evaluation a

s 5.1 Introduction l The CNSI 21-300 packaging consists of steel-lead-steel composite walls, lid and bottom which provide the necessary, shielding for,the various radioactive materials to be shipped within the package. -In addition, an internal auxiliary shield and a load distribution pallet are available for use with this cask which provide increased shielding effectiveness. Analyses described in Sections 2.0 and 3.0 have demonstrated the ability of this container to maintain its shielding integrity.

Prior to each shipment, radiation readings are taken to assure compliance with applicable regulations.

i-Analyses are presented on the following pages which evaluate the shielding capability of this package considering the following assumptions:

1) Maximumaliowabledoserateshallbe200 mrem /houronthecask surface, or 10 mrem / hour at six feet from the cask surface, whicheve,r is limiting.

2) The source 3~s modeled as a, point source which can exist on any interior cask surface. This is very conservative, as the source is considered to be in contact with all inner cask surfaces at the sane time.

3) The auxiliary shields will be modeled in a worst' case configuration that assumes the shield is in contact with the package wall with no annular space.

c Table 5-1 summarizes the maximum dose rates based on thesd assumptions.

i 2

k h

+

\\

l

/

4

,\\ '

1 I

i t

c,'

5-1 4

l

_A f

l I

5.2 Package System Shielding Analysis The cask side wall consists of the outer 0.75-inch steel shell surrounding a 1.0-inch thickness of. lead and an inner wall of 0.125-inch thick steel. Total material shield thickness is 0.875 inches of steel and 1.0 inch'of lead.

The auxiliary shield will add 1.0 inches of steel to this total.

When the auxiliary shield is used in the 21-300 cask, it is assumed that the contents inside the shield create the maximum dose rate of 10 mrem /hr at six feet from the outer cask surface or 200 mrem /hr on the cask surface, whichever is limiting.

The bottom end of the cask body shielding consists of an outside layer of 0.75-inch thick steel and a 1.0-inch thick ' lead shield with inner containment layer thicknesses of 'O.125 inch and 0.375 inch of steel.

Total material shield thickness of the bottom end of the cask is 1.25 inches of steel and 1.0 inch of lead. There would be no additional shielding provided to the bottom end by the auxiliary shield design.

s The outer surface of the top (closure) end of the cask is a 0.75-inch thick steel plate.

The internal lead shield thickness is 1.0 inches. -The cavity side of the closure assembly is two 0.25-inch thick steel plates. Total material shield thickness is l.25 inches of steel and 1.0 inch of lead.

The load distribution pallet, which forms a top for the auxiliary :hield, adds 1.0 inch of steel to this total.

5.2.1 Source Specification Gamma Source The cask is to handle non-fuel-bearing reactor components or solid and solidified processed solids. The major gamma radiation source is assumed to be Co-60 f rom stainless steel components to be handled. Since source geometry will vary considerably for this container, the conservative approach for shield design shall be for the analysis to be based upon a point source (shape and volume factors are.not taken into account).

5-2 l

b.

neutron Source There are no sources of neutron radiation in the radioactive materials carried in the CNS 21-300 Cask.

5.2.2 Model Specification Description of the Radial and Axial Shieldina Confiquration Dimensions of the radial and axial shielding material modes are shown in Figure 5-1.

Shield Regional Densities The mass densities for each material are shown in the table below.

SHIELD REGIONAL DENSITIES MATERIAL ELEMENT DENSITY (a/cc)

Carbon Steel Fe 7.86 Lead Pb 11.34 5-3 i

1

'(

5.2.3 Analysis and Results I

Radial mdel f

d to regulatory dos'e" rate

, De gamma radiation sources that correspon limits for the cask in a radial direction were calculated a point source.

in Figure 5-1, l

De point source is determined as follows:

S

-b o

3 (y = KB e

Y where, 6 = Photon Flux, Y

cm -sec r

for Co-60 K = Flux to dose conversion = 2.3 X 10-6 _

Y So = Iiquivalent source, d t

bl = I vi i i

B

= R111 dup factor e Distance from source to dose point, cm a

trough the side of the cask, the following values are used:

Case 1: No Aux. Shield t = 1.0 in. = 2.54 cm, v/o = 0.0600 Imad:

y = 0.684 ca-1 t = 0.875 in. = {.22 cm, v/o = 0.0515 Steel:

y = 0.415 cm- '

l 5-4 f_,

~~ -

~ ^

->-e r

44

l Case 2: With Aix. Stield lead:

t = 1.0 in. = 2.54 cm, v/p = 0.0600 y = 0.684 cm-1 t = 1.875 in. = 4.76 cm, v/p = 0.0515' Steel:

y = 0.415 cm-1 Giving: bl = 2.66 (Oise 1) bl = 3.71 (Case 2)

' Die buildup factor is taken for steel to represent the laminated shield.

B = 4.6 (Case 1) s B = 6.0 (Case 2) hro dose rates will be considered:

Di = 10 mr/hr, where:

a = 1.875 in + 72 in. = 73.9 in = 188 cm Case 1:

9 Wtich gives, So = 6.0 X 10 1

sec a = 2.875 in. + 72 in. = 74.9 in. = 190 cm Case 2:

which gives, So = 1.3 X 1010, sec and, D2 = 200 ar/hr, where:

Case 1: a = 1.875 in. = 4.76 cm 7

which gives, So = 7.7 X 10 Y

seC Case 2: a = 2.875 in. = 7.30 cm 8

which gives, So = 4.0 X 10 y

sec

'?

t 5-5

\\

1 h

w

,-.e

w--_

(

He dose rates at the cask surface and-at 6 feet from the sur-for v face are shown in Figure 5-2 s

or without auxilary shields.

AEialModel correspond to regulatory dose rate De gamma radiation sources that limits for the cask in an axial direction were calculated ass point source.

Figure 5-1.

Se point source is determined as follows:

S

-b o

y KB q e

=

4xa

/

cm[-sec where,$ = moton Flux, 7

R/hr for Co-60 i

K = Flux to dose conversion = 2.3 X 10-6

Y Y

So = Equivalent sou m e, _seC bl E gti i

B

= Buildup factor

= Distance from source to dose point, cm I

a i

i i

5-6

+r r_..___

I.

D rough the top of the cask, the following values are used:

Case 1: No Aux. Shield

' lead: t = 1.0 in. = 2.54 cm, v/p = 0.0600 y = 0.684 cm-1 Steel: t = 1.25 in. = 3.18 cm, v/p = 0.0515 9 = 0.415 cm-1 Case 2: With Aix. Stield lead: t = 1.0 in. =12.54 m., v/o = 0.0600 y = 0.684 cn-Steel: t = 2.25 in =15.72 cm., v/p = 0.0515 y = 0.415 cm-Giving: bl = 3.06 (Case 1) bl = 4.11 (Case 2)

De buildup factor is taken for steel to represent the laminated shield.

B = 4.8 (Onse 1)

B = 6.6 (Case 2)

Wo dose rates will be considered:

Di = 10 mr/hr, where:

Case 1: a = 2.25 in. + 72 in. = 74.25 in. = 189 cm.

9 which gives, So = 8.7 X 10 y

sec Case 2: a = 3.5.5 in + 72 in. = 75.25 in - 191 cm 10 which gives, So 1.8 X 10

_y__

sec 5-7

(r.

D2 = 200 ar/hr, where:

Ca.,se 1: a = 2.25 in = 5.72 cm 8

.j.

y which gives, So = 1.6 X 10 sec i

Ca'se 2: a = 3.25 in. = 8.26 cm 8

y which gives, So = 6.9 X 10 sec from the surface are De dose rates at the cask surface and 6 feetfor various source strengths w shown in Figure 5-3 auxilary shields.

OJote:

hrough the bottom of the cask the following values were used:

Dere is only one case examined for the bottom as auxilary shielding is not added to this area.)

Imad: t = 1.0 in. =12.54 ca., y p= 0.0600 9 = 0.684 cm-Steel: t = 1.25 in. = 3.18 cm, y p = 0.0515 '

u = 0.415 cm-1 Giving: bl = 3.06 he buildup factor is taken for steel to represent the laminated shield.

B = 4.8

'hto dose rates will be considered:

Di = 10 ar/hr, where:

a = 2.25 in. + 72 in = 74.25 in = 188.6 cm 9

Y s ich gives, So =

8.7 X 10 sec I

i 5-8

(

D2 = 200 ar/hr, where:

a = 2.25 in. = 5.72 cm 8

y which gives, So =

1.6 X 10

-sec 1he dose rates at the cask surface and 6 feet from the surface a for various source strengths.

shown in Figure 5-3 5.3 Appendix 1.

Table 5-1 Sumary of Maximum Dose Rates 2.

Figure 5-1 Shielding Models 3.

Figure 5-2 Cask Side Wall 4.

Figure 5-3 Cask Top and Bottom t

5-9

w 7

TABLE 5-1

SUMMARY

OF MAXIMUM DOSE RATES (mR/hr) 6 Feet from Package Surface Surface of Package Side Top Bottom Side Top Bottom NORMAL CONDITIONS Gansna 200 100 100 10 7

7 WITH AUX.-SHIELD Gama 80 55 200 6

5 10 i

b W

b b

5-10

Figure 5-1 SHIELDING MODELS 6eatul 3rsa

('

t wt

/wiar s'ar$use f 1

?!"""

$N k

1

~

,g.

3".- {.

~@et 't Salc) g

==

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@r' ucan p.

/ S.i t w

4_4 w w

.- w et,-.

%bsAL t

Mobets s errro n e rop (c=t owAC)DJD

=

CAfgns STEEL m,

\\

c..., a,,r so =c

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. k **g,,",

-. unt i,

n i.

n,%

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m rw r

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4,/

t=.( r. pla M

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'; gr kbee. L*at < =

s e==

, e m=

-t

,.g-- ----

Mt T. seal )

<1

=

Av.s At.

Mott L3 5-11

_. INTERNAL. SOURCE STRENGTH (y/sec). _... _. _. _ _

w

~o o

l e=m

_~

w n

o

'd en J

I'

%, ;K" ('

1 a

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x. m.

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$5

= -

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l x

x m

T4 x.-

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e g 'l g

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p c s

. p-i;gy:.

o L

L.-

m

.k,<'(

p.

]

i

%oy diif d*% sjh W,

l b d

v

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..n..

3 g

g 4 <.,..

x m

q 4

3 7

n s

s s

v

,p e

g.

i i

l' 1

i INTERNAL SOURCE STRENGTH (y/sec) s-.

~

o a

>o r

o=

e

.-.=

.= =.

n

m. e..

s a

g-j a..

L

Uii;;i 'P *

.GE w

DQ l

't

'~

l y

,f.

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x f*

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n f

{4+,

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.=

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~*

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e 1

T-

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"~~

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30 o

% O[i

'. HE E

(

1. :

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pt g*f. o,

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r h,e l

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=

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6.0 Criticality Evaluation Not applicable for 21-300 packaging 6-1 1 -

L 7.0 Operating Procedure 1

This section generally describes the procedure for loading and unloading i

i of the CHS21-300 cask. Detailed procedures developed, reviewed, and approved following requirements of the CNSI Q.A. program are issued to 4

authorized users.

NOTES o

When using the auxiliary shield for shipments of 55 gallon drums, waste shall be solidified.

L i

o When using the auxiliary shield, radiation levels on accessible areas beneath the transoorter must be within DOT limits.

([)

o Auxiliary shield and load distribution pallets must have their l

respective weights Stenciled on them prior to use and care taken to ensure that the maximum payload including these items, shoring and waste content is less than 27,250 pounds, t

l 7.1 Loading Procedure for 55 gallon drums (or for installation of pre-filled liner) i 1.

Remove and discard the seal wires from the appropriate primary lid i

bol ts.

j 2.

Loosen and remove the 12 (twelve) 1-1/4 inch diameter bolts that l

secure the primary lid to the cask body.

l 3.

Using a lifting sling attached to the three synmetrically located primary lid lifting lugs, lif t the primary lid.

4.

Inspect and verify integrity of cover gasket.

i 5.

Lay down lid on a suitable protected surface, treating lid underside as potentially contaminated.

i t

6.

Using crane and suitable riggings, remove pallet (s) and any j

shoring asterial from the cask cavity.

l 7.

Visually inspect cask cavity to verify integrity, i

8.

Load each pallet with a maximum of 7 (seven) 55 gallon drums.

Shielding effectiveness may be optimized by placing drums with j

highest surface dose rate near the center of the pallet.

9.

Attach crane to the lifting ring of the pallet and carefully lower into cask cavity, use caution to not damage the gasket seating surfaces or inner walls of cask cavity.

10. Place shoring where appropriate between drums and cask cavity walls to prevent movement during transport.

1 7-1

11. Repeat the loading procedure for the next layer (s) of palletized drums.

Note: For pre-filled liners, use crane to lower ifner into cask cavity.

12. Ensure liner cables or drum pallet cables swing clear to allow proper installation of load distribution pallet and cask lid.

O

13. Attach crane hook to the cables on the load distribution pallet.

14. Lower the load distribution pallet into the cask ensuring that the pallet fits over the drum pallet or liner cables.

15. Inspect and clean the gasket seating surfaces.

16. Lift the primary lid onto the cask and position properly using key and keyway.

17. Replace the (twelve) 121-1/4 inch bolts and torque to 200 + 10

~

ft-lbs using a star pattern.

18. Install anti-tanper seal wires in appropriate bolts.

19. Perform cask survey and verify that the following requirements are satisfied:

A.

Cask external radiation levels do not exceed 200 mR/hr on contact,10 mR/hr at 2 meters and 2 mR/hr in the tractor cab h

in accordance with 10CFR71.47 and 49CFR173.441.

B.

Cask external renovable contamination is ALARA and does not exceed 22 dpm/cm2 beta-gama and 2.2 dpm/cn2 alpha in accordance with 10CFR71.87.

7.2 Loading Procedure for Liners (for enpty liiers pre-installed in cask cavity) 1.

Remove and discard the seal wires from the appropriate secondary

. lid bolts.

2.

Loosen and remove the (eighteen) 18 3/4 inch diameter bolts that secure the secondary lid to the primary lid penetration.

3.

Attach a lifting sling to the single center-mounted lug on the secondary lid, and lif t the secondary lid.

4..

Inspect and verify integrity of cover gasket.

5.

Lay down lid on a suitable protected surface, treating lid underside as potentially contaminated.

6.

Proceed with filling the liner following appropriate personnel precautions and operational procedures.

7-2

l l

7.

Inspect and clean the gasket seating surfaces.

8.

Lift the secondary lid onto the primary lid and position using indicated alignment marks.

9.

Replace the (eighteen) 18 3/4 inch bolts and torque to 50 + 5 ft-lbs using a star pattern.

10. Install anti-tamper seal wires in appropriate bolts.

l

11. Perform cask survey and verify that the following requirements are l

satisfied:

A.

Cask external radiation levels do not exceed 200 mR/hr on contact,10 mR/hr at 2 meters and 2 mR/hr in the tractor cab h

in accordance with 10CFR71.47 and 49 CFR173.441.

B.

Cask external removable contamination is ALARA and does not exceed 22 dpm/cm2 beta-garina and 2.2 dpm/cn2 alpha in.

accordance with 10CFR71.87.

5 l

7.3 Unloading Procedure NOTE: Upon receipt of cask, perform survey for direct radiation and m

renovable contamination using approved procedures to assure compliance U/

with applicable requirements of 10CFR20.205.

1.

Remove and discard the seal wires from the appropriate primary lid bol ts.

2.

Loosen and remove the (twelve) 1?.1-1/4 inch diameter bolts that secure the primary lid to the cask body.

3.

Using a lifting sling attached to the three symmetrically located primary lid lifting lugs, lift the primary lid from the cask.

4.

If appropriate attach crane hook to the cables on the load distribution pallet.

5.

Lift the load distribution pallet straight up and out of the cask.

}

6.

Attach crane and rigging to appropriate lift points on liner or l

drum pallet.

7.

Proceed with removal of all contents from cask cavity.

8.

Clean cask interior as required and inspect interior surfaces for l

integri ty.

9.

Install new liner or drun pallets fri cask.

l

10. If appropriate for next use, attach crane hook to the cables on y

l the load distribution pall,et.

7-3

11. Lower the load distribution pallet into the cask ensuring that the g

pallet fits over the liner cables or en top of the auxiliary W

shiel d.

12. Clean and inspect the gasket sealing surfaces.

13. Lift the primary lid onto the cask and position properly using key and keyway.

j

14. Replace the (twelve) 121-1/4 inch bolts and torque to 200 + 10

~

ft-lbs.

i

15. Install anti-tamper seal wires in appropriate bolts.

16. Prior to departure from site, ensure that exterior radiation levels are acceptable, and proper placarding is in place.

I i

s e

a i

f l

i

(

7-4

8.0 Tests and Maintenance CNSI is committed to an ongoing preventative maintenance program for all shipping packages. The CNS model 21-300 package will be subjected to routine and periodic inspections and test as outlined in this section and CNSI approved procedures.

8.1 Structural Tests Routine visual examinations will be performed to detect and correct damage or defects significant to package condition.

Exterior stencils, nameplates, seals and bolts will be verified in place, and in good condition.

Painted surfaces will be inspected to insure acceptability. Any refurbishment will be per approved CNSI procedure.

Prior to each actual shipment, cask lid alignment marks will be inspected and their placement verified.

8.2 Lid Gasket The lid gaskets.will be inspected every loaded shipment, and replaced as necessary. Regardless of inspection results, the gaskets will be replaced every 12 months, if the cask is in use.

8.3 Shielding No tests are required for shielding performance other than normal transportation compliance surveys.

8.4 Thermal No thermal test are required.

8-1

f 9.0 9_uality Assurance As required by Section 71.101 (Subpart H) of 10CFR71, Chem-Nuclear Systems, Inc. has established a quality assurance program which satisfies the specified criteria. A description of this program was approved on January 23, 1985 by the Chief, Transportation Branch, Division of Fuel Cycle and Material Safety, USNRC.

Section 13.2 of the CNSI Quality Assurance Program requires:

1.

Transport cask handling and operation shall conform to the written handling and operation procedure for each licensed cask.

2.

Prior to the shipment of a transport cask all condition of the NRC's Certificate of Compliance (specifications, tests, inspections) shall be satisfied. All required shipping papers shall be prepared and shall accompany the shipment.

3.

Quality Assurance located at Barnwell, S.C.,

is responsible for inspecting all critical cask handling, storage and shipping operations conducted by Barnwell Site Operations.

4.

Established safety restrictions'concerning handling, storage and shipping shall be included in the handling and operating procedures for transport casks.

9-1 d

v----

r-i emXCHEM-NUCLEAR SYSTEMS,INC.

220 Stoneridge Drive

Columbia South Carolina 29210 ATTACHMENT 3 CNSI request! for non-safety related change, Docket No. 71-9096 CNSI requests that the option be made available to use a single lift point on the load distribution pallet to minimize operational problems with the cables. Revision C to CNSI Drawing No, ll4-D-0006 includes this option and has been submitted in the revised Safety Analysis Report.

This change has no safety related consequences.

(803) 256-0450

Triex: 216947

. _ _. -

ML20132C237

Text

1.1 INTRODUCTION

Reference:

._n.

=

2.1 INTRODUCTION

REFERENCE:

23.1 ksi SHEAR STRENGTH, S'

32.3 IN-KIPS BENDING MOMENT

29(10 )(0.75)3/12(1-0.09) = 1.12(10 ) LB-IN /IN D

0.003 IN SMALL *.0K 2R

0.002 IN SMALL 1.OK oY

.95 iN oK A37,

REFERENCE:

6060 psi CONSERVATIVE (fH00P) MEMBRANE"- (0.875)2 INNER STL = 1/8" OUTER STL = 3/4" (fH00P) BEND

SUMMARY

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