ML20198H297

Rev 1 to SAR for Chem-Nuclear Sys,Inc Model CNS 8-120A Certificate of Compliance 6601 Type a Radwaste Shipping Container, Consolidated Version

ML20198H297
Person / Time
Site:	07106601
Issue date:	12/31/1985
From:	CHEM-NUCLEAR SYSTEMS, INC.
To:
Shared Package
ML20198H289	List: ML20198H283 ML20198H297
References
NUDOCS 8601300258
Download: ML20198H297 (7)

Text

. _ __________ _ __

SAFETY ANALYSIS REPORT FOR CHEM - NUCLEAR SYSTEMS, INC.

MODEL NO. CNS 8-120A CERTIFICATE OF COMPLIANCE NO. 6601 TYPE A RADWASTE SHIPPING CONTAINER CONSOLIDATED VERSION REVISION 1 DECEMBER 1985 CHEM - NUCLEAR SYSTEMS, INC.

CORPORATE HEADQUARTERS 220 STONERIDGE DRIVE COLUMBIA, SOUTH CAROLINA 29210 hDO kD 01 PDR C

A

CNS 8-120A Safety Analysis Report Rev. 1 12-85 1.0 GENERAL INFORMATION 1.1 Introduction This Safety Analysis Report (SAR) is submitted in support of Chem-Nuclear System's request for the renewal of Certificate of Compliance No. 6601 for the CNS 8-120 cask as a type A package.

Revision 0 of this SAR was issued July 1985.

Revision 1 dated December 1985 incorporates comments identified in NRC letter dated October 29, 1985.

The package is used for the transport of radioactive wastes which meet the requirements defined in Section 1.2.3. The 8-120 is capable of safely transporting Type A quantities of radioactive material or greater then Type A quantities meeting the definition of low specific activity materials.

The material is contained within liners or 55 gallon drums.

This safety analysis demonstrates compliance with Normal Conditions of Transport as defined in 10CFR71.

Authorization is sought for shipment by motor vehicle, rail and cargo vessel.

1.2 Packacina Description 1.2.1 Packacina The CNS 8-120 cask is a cylindrical lead-filled steel weldment weighing approximately twenty-five (25) tons.

The cask provides an effective cavity of 62 inches diameter by 75 inches long with a gamma ray shielding equivalent of about 4.5 inches of lead.

The outside diamete of the main body of the cask is 73.5 inches and the overall length is 92 inches.

The cask cylindrical body is constructed of concentric exterior and interior steel shells which are welded at the bottom to a laminated steel base plate assembly which is welded and pinned.

The exterior and interior shells form an annulus which is lead filled.

A laminated steel lid is provided to close the cask and to secure the contents during transportation.

The cask outer shell assembly is fabricated of (2) 0.75 inch thick ASTM-A-516, Grade 60 or Grade 70 carbon steel plates. The structural analysis is based on the grade 60 steel which is conservative.

1 1

CNS 8-120A Safety Analysis Report Rev. 1 12-85 Encircling the top of the cask are partial length shells of 1/2 inch and 1 inch thick ASTM A-516, Grade 60 carbon steel plates.

These shells are provided for added protection to the lid and lid bolts in the event of a corner drop accident.

The outer 1/2 inch thick shell extends 15 inches down the side of the cask to further protect the flange ring which provides the lid bolting surface.

The inner shell assembly is fabricated of 0.5 inch and 0.25 inch thick ASTM-A-516, Grade 60 or Grade 70 carbon steel plates. The annulus formed between the interior and exterior shell assemblies is 3.5 inches thick and is filled with ASTM-B-29 lead. The base plate assembly and top lid assembly are fabricated of ASTM-A-516, Grade 60 or 70 carbon steel plates (multilayer welded plates of varying thickness).

Connecting the exterior and interior shell assemblies at the cask top is a 2.5 inch thick ASTM-A-516, Grade 60 or Grade 70 flange ring which has 32, 1 3/4"-5 tapped holes to accommodate the cask lid bolting.

A cask cavity drain port with a removable plug penetrates the cask bottom plate and exits at the cask sidewall on a centerline 3" above the cask bottom surface.

This drain port has been sealed by coating the threads with a nonhardening thread sealing compound.

The 7 inch thick top lid is equipped with 7 threaded ASTM-A-36 steel plugs.

These plugs have also been sealed by application of a nonhardening thread sealing compound.

The lid is secured to the main body of the cask by thirty-two ASTM-A-320 Grade L7, 1 3/4"-5 hex head or socket head cap screws.

A 5/16 inch (nominal) silicone 0-ring is utilized to provide a leak tight seal.

Three lifting lugs are provided on the lid for use in removing the lid from the cask.

Four lifting lugs are provided on the sides of the cask for us> in lifting the cask if necessary.

The cask is secured to the trailer bed by four (4),

2 1/2 inch tie-down rods (125,000 psi-ultimate tensile stress). The top end of the tie-down rod is secured to criss-crossed beams placed on top of the cask lid.

The bottom end of the rod is engaged in a spherical seat, built in a pedestal, which is secured to the trailer frame by eight (8), 1 1/2"-6 bolts. The 1

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Rev 1 12-85 GENERAL NOTES 1)

MATERIAL: UNLESS OTHERWISE NOTED, OR CHEM-flUCLEAR APPROVED EQUIVALENT (A) CARB0fl STEEL PLATES - ASTM A-300, A-516 GRADE 60 RODS & BOLTS ASTri A-320 GRADE L7 (B) LEAD - PIG LEAD, CHEMICAL GRADE ASTM B29-55 (1966 REAPPROVAL) 2)

WELDING: ALL WELDS TO BE C0fiPLETE PEHETRATION, UHLESS OTHERWISE NOTED.

USE ELECTRODE ASTf1 A-316, CLASS E8016-C3.

SEAf1 WELDS Oil INNER & OUTER SHELLS TO BE STAGGERED & GROUfl0 FLUSH.

WELDS, WELDERS & IllSPECTION OF CASKS STRUCTURAL INTEGRITY SHALL CONFORM TO ASME SECTI0fl III CLASS C.

3)

PAINT PPEPARATION:

PRIOR TO PAltlT APPLICATION, REff0VE ALL GREASE, DIL, SALT, CHEMICALS & SIMILAR CONTAMIHENTS IN ACCORDANCE WITH SSPC-SP 1 (SOLVEllT CLEAHIllG). THE SURFACE SHALL THEll BE DRY ABRASIVE BLAST CLEAf!ED IN ACCORDANCE WITH SSPC-SP6 (C0ftMERCIAL BLAST CLEANING) USING ABRASIVE OR SUCH PARTICLE SIZE AS TO GIVE AN ANCHOR PROFILE OF 1.5 MILS.

PRIOR TO PAINTING, BLAST MEDIA RESIDUE SHALL BE REf10VED BY AIR BLASTING OR VACUUf1 CLEANING.

THE PRIfiER SHALL BE APPLIED WITHIN 8 HOURS AFTER BLAST CLEANIflG OR BEFORE ANY VISIBLE RUSTING OCCURS.

4)

PAINT PROCEDURE: PAINT PER " CARBOLINE" SPEC 188 EP0XY PRIMER & PAINT SYSTEM.

TOTAL MINIlluff THICKHESS 6111LS (EXCEPT MACHIf!ED SURFACES).

5)

(A) +.032 TOLERANCE WITH RESPECT TO 21/2 TH'K FLANGE.

(B) T 1/4 TOLERANCE WITH RESPECT TO IllHER SHELL ASSEMBLY, (ITEMS 10 & 11)

EENGTH, 78 1/2".

6)

TOLERANCE: UNLESS OTHERWISE SPECIFIED.

DIiiENSIGHS UllDER 12" + 1/16 12" to 24" T 1/8 24" to 60" T 3/16 OVER 60" AS SPECIFIED 7)

LEAD INTEGRITY AND SHIELDING EFFECTIVEHESS ALL LEAD POURING SHALL BE DONE CONTINUOUSLY TO AVOID GAPS OF RADIATI0f!

STREAMING PATHS. GAfif1A SCAN OF PROBE WILL BE REOUIRED TO INSURE SHIELDING INTEGRITY.

LOSS OF SHIELDING AT ANY POINT IN EXCESS OF 5% WILL REQUIRE REf1EDY BY THE FABRICATOR.

THE PROCEDURES AND EQUIPfiENT TO BE USED FOR THE LEAD POURING AND SUBSEQUENT TEST OF SHIELDING EFFECTIVEllESS ftOST BE APPROVED BY CHEM-HUCLEAR PRIOR TO PERFORMANCE.

8)

IflNER AtlD OUTER SHFLL ASSET 1BLIES 8/9 AND 10/11 ftUST fl0T BE CLEA!JED FREE OF MILL SCALE PRIOR TO WELDING AllD A LOOSE FIT 1,uu in r%INTAIMED BY FITTIflG THESE SHELLS SUCH THAT THERE IS A 1/32 RADIAL GAP.

Page 1 of 2

o Rev 1 12-85 9)

THE CAVITY WHICH WILL ACC0ft10DATE THE LEAD POUR MUST BE WIRE BRUSH CLEANED FREE FROM RUST AND 11ILL SCALE. OIL AND GREASE MUST BE REMOVED BY A SUITABLE SOLVENT T011 Alt lTAIH ALL SURFACES CLEAN PRIOR TO LEAD POUR.

10) LEAK TEST ALL WELDS ARE TO BE LEAK TESTED USING A DYE PENETRANT METHOD.

THE ASSEMBLED CASK, WITH ALL SEALS Ill PLACE IS TO BE LEAK TESTED ACCORDING TO ASME CODE SECTION VIII, TO INSURE ITS INTEGRITY. THE NORiiAL OPERATING PRESSURE OF THE INTERNAL CAVITY IS 2S PSIG.

11) AFTER EACH USE: PRIOR TO INSERTING PLUGS, COAT THREADS WITH tl0N-HARDEllING THREAD SEALANT.

SUGGESTED SEALANTS:

Permatex #2 by Permatex Co., Inc.

Plastic -Seal by Johns-fianville Key Paste by W. K. ii. Valve Quigley *0 Seal by Zophar fiills or Chem-Nuclear approved equivalent

12) a)

The handle on the liner fill access plug (Item 26) may be replaced with a 1 1/2" square by 1" high bar stock attached to the plug with a 1/4" fillet weld, b)

The handle on the liner vent and drain access plug (Item 25) may be replaced with 1 1/2" square by 1 1/4" high bar stock attached to the plug with a 1/4" fillet weld.

Page 2 of 2 0291C

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M DESCRIPTION (ALL DIM. NOMINAL MATERIAL /EDUIV.

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20. Plate 3" THK x 591/2" 10 x ASTM A-300 A516 1

Plate 2" THK x 73 1/2" Dia ASTM A-300 A516 1

71 1/2" HOM O,0.

GR 60 1.

7 GR 60

21. Pipe - 31/2" Double Extra ASTM-A333, GR 10R6 5

eun 7 Q 2.

Plate 2" THK x 731/2" Dia ASTM A-300 A516 1

Strong n 7" Lg.

GR 60 h g

22. Pipe - 8" Double Extra Strong x ASTM-A333, GR 10R6 2

M 3.

Plate ?" THK x 62" Dia ASTM A-300, A516 1

(150W) x 7" Lg.

g

\\

m GR 60 i+ 1 P.I*

I A! j 4.

Plate 1" THK x 62" Dia ASTM A-30n, A516 1

23. Bar 3" x 3" x ??" Lg.

ASTM A-36 3

f

%}[J" h 5.

Rod 1 1/2" Dia x 5 7/8 Lg.

ASTM A-370 GP L7 1

24 Rod 1/4" Dia x 1/2" Lg.

ASTM A-36 4

GR 60

)

7 I

J 6.

Pipe - 1/2" STD x 3 3/4 Lg.

ASTM A-36 1

25. Rod 3" Dia x 7" Lg.

ASTM A-36 5

7.

Pipe Plug - 1/2" STD - C' Sunk 1

26 Rod 6.83 Dia x 71/8 Lg.

ASTM A-36 2

S El g

g by

50. Pattern Ring 10 5/8 Dia x 3/8 THK x) k 2 h 8.

Plate Polled - 3/4" THK x ASN A-300, A516 1

27. Deleted

\\

78 1/2" tg. x 72" 1.D.

GR 60 1

l vs

28. Bolt 1 3/4" = 5 Utar. x 4 7/8" Lg.

ASTM A-320 GR L7 32 9.

Plate polled - 3/4" THK x ASTN A-300, A516 1

Hex HD or socket HD or equal 4

I 781/2" Lg. x 701/2" 1.D.

GR 60 1

SILIC0tlE 1

29. 0-Ring 62 3/8 1.D. x 5/16",THK 10.

Plate Rolled 1/2" THK x ASTM A-300, A516 1

GR 60 1

30. Plate 6 x ? 11/16" x 1/4" THK ASTM A-285-C PVQ 12 781/2" x 621/2" 1.D.

ASTM A-285-C PYQ 3

aE

11. Plate Rolled 1/4" THK x ASTM A-300, A516 1

31. Plate 1/16 THK 78 1/2" x 62" 1.D.

GR 60 1

5

32. Rod 7/8 Dia x 4 og.

ASTM A-193 GR 87 3

12. Plate 21/2" THK 62" I.D. x ASTM A-300, A516 1

I 731/2 DD GR 60 1

33. Shackle 3/4 Round Pin Chain Type

1. S-215 Crosby 3

fQ or equal u

j

13. Plate Rolled 1" THK 71 1/2" ASTM A-300 A516 1

I.D. x 7" GR 60 1

34 Plate 41/4 x 11 1/2 x 1" THK ASTM A-785-C PVQ R

jE g

g 3l (D

l g"

14. Plate Rolled 1/2" THK x 15" ASTM A-300, A516 1

35. Plate 3 5/8 x 71/2 x 1" THK ASTM.a-285-C PVO 4

r a

x 731/2" 1.D.

GR 60

36. Plate 121/4 x 13 x 5/8 THK ASTM A-785-C PVQ 4

m f0 F

g o

(""

15. Sheet 1/16" THK 631/2" 1.D.

ASTM A-36 1

x 67 i/2" OD

37. Rod 1 1/2 Dia x 9 3/4" L9 ASTM A-193 GR 87 4

o >

0 y3

16. Plate 1/2" THK x 61 3/4" 0D ASTM A300, A516 1

38. Shackle 13/8" Round Pin-Chain Type

1. S-?l5 Cros:;y 4

O or equal O

GR60 y

8 O

El' n

d

17. Plate 21/2" THK 61 3/4" CD 5 M A-300, A516 1

39. Plate 1/16" THK ASTM A-285-C PVQ 4

y y

d 40.

Bar 1 7/8" Dia x 15" Lg.

ASTM 1020 2

3 K TTI :

18. Plate 21/2" THK x 71 1/2" 00 ASTM A-300 A516 1

5 )

T 4

GR60

41. Bar 3/4" Dia x 15/16" ASTM A-36 2

~

h

19. Plate 1 1/2" THK x 71 1/2" 00 ASTM A-300, A516 1

42. Rar 1/2" THD Rod x 1/2" Lg.

ASTM A-36 2

I""'

~

p<

x N

l GR 60 ASTN A-320 (R L7 20 l v

43. Pod 1 1/2" Dia x 6" Lg.

.o CNS-120A Safety Analysis Report Rev. 1 12-85 4,3 Containment Reautrements for Hypothetical Accident conditions 4.3.1 Fission Gas Products There are no fission gas products that are available for release in the containment vessel under hypothetical accident conditions.

4.3.2 Release of Contents There is no release of radioactive material from the containment vessel due to its structural integrity as verified in Section 2.

4.4 Combustible Gas Generation Safety Assurance Assurance of safe shipuent of vessels which may generate combustible gas is based on meeting the following criteria over a time period of twice the expected shipment time.

1)

The quantity of hydrogen generated must be limited to a molar quantity that would be no more than 5% by volume at STP (or equivalent limits for other inflammable gases) of the secondary container gas void (i.e., no more than 0.063 gram-moles / cubic foot, or

11) The secondary container and the cask cavity (if required) must be inerted with a diluent to assure the oxygen, including that radiolytically generated, shall be limited to 5% by volume in those portions of the package which could have hydrogen greater than 5%.

Criterion (i) essentially stipulates that the quantity of hydrogen shall be limited to 5% of the secondary container gas void at STP.

This 5% hydrogen gas volume at standard conditions is equivalent to a hydrogen partial pressure of 0.735 psi or 0.063 gram moles / cubic foot.

By actual experiment (Ref. 1), the ignition of a 5% hydrogen gas volume has been demonstrated to produce an approximate 2.3 psi incremental pressure increase above a nominally atmospheric initial pressure.

This is because 0.063 gram moles of hydrogen per cubic foot provides such a small source that the peak pressure rise resulting from ignition of this source is slight.

(The pressure rise is independent of the total volume under test, i.e. the 0.063 gram moles per cubic foot relationship to a 2.3 psi pressure rise is valid for one or many cubic feet of specimen volume).

This incremental pressure rise 4

2

.