ML19318C999

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To Pages SAR (Application) for Model NP-50ssL Casks
ML19318C999
Person / Time
Site: 07109130
Issue date: 06/06/1980
From:
NUCLEAR PACKAGING, INC.
To:
Shared Package
ML19318C997 List:
References
16526, NUDOCS 8007070179
Download: ML19318C999 (9)
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INSTRUCTIONS FOR INCORPORATING REVISION III AMENDMEN?.S TO MODEL NP-50xxL APPLICATION, DATED JUNE 6, 1980 Insert new page 0-3 Remcve old page 0-3 Insert new page 0-4 Renove old page 0-4

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Insert new page 1-19 Remove old page 1-19 Insert new'page'l-34 Insert new page 1-35 Insert _new page 1-36 Insert drawing X-20-200D Rev C Remove old page X-20-200D Rev B Insert new page 1-37 Insert new page 1-38

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Ravicion,

Juna 6, 1980 The cask body consists of 3/3. inch external and internal steel shells separated by a lead shield between these two shells.

The top and bottom ends of the cylindrical cash are constructed of a pair of stacked steel plates.

Poference dimensions of the cylindrical lead shield and steel ends are:

Thicknesses (in)

I1)

I Version Lead Shield Steel Ends 50-1.5L 1-1/4 2-1/4 50-2.5L 2-1/4 4

50-3.0L 2-3/4 4-1/2 30-4.0L 3-3/4 6

Notes:

(1)

Does not include the 3/8" internal and external steel shells.

(2)

Comprised of two steppec plates.

The top serves as a removable cask. lid and is secured to the cylindrical cask body by eight high strength 1 inch ratchet binders.

A 23 1/2 inch secondary cask lid is located in the center of the primary lid and is secured to the primary lid by eight 3/4 inch studs.

Lifting lugs and tiedowns are a struc 1 part of the s

package.

0.2.1.3 Containment Vessel The NuPac 50-xxL Cask serves as the containment vessel and its mechanical configuration is described in the foregoin, paragraph.

i

-3 i.

+

0-3 V

R;vicion,

Juna 6, 1980 A neoprene gasket is employed in the primary and secondary lid

~3 interfaces, The secondarv lid also uses a redundant neoorene seal.

Waste products will be contained in 55 gallon drums or with heavy gauge. disposable steel liners.

0.2.1.4 Neutron Absorbers There are no materials used as neutron absorbers or moderators in the NuPac 50-xxL packaging.

0.2.1.5 Package Weight The gross, net and payload weights of the NuPac 50-xxL packaging are:

50-1.5L 50-2.5L 50-3.0L 50-4.0L Lids Primary 940 1755 203n 2665 Secondary 340 610 685 910 Cask Body

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Steel Shells 1840 1940 1975 2065 End 1280 2365 2715 3775 Lead 4305 8160 10160 14490 Lugs / Binders 130 130 130 130 i

Net Cask Wt:

88.35 14960 17695 24235 Payload ~Nt:

4200 4200 4200 4200 Gross Wt:

13035 19160 21895 23435 (Use for1 Analysis:

13100 19200 22000 23500) 3-4 6

R vicion June 6, 1980 l

Tnree drop orient.itiens are possiblo:

flat end drop, aide drop and corner drop.

For the flat and drop, the most critical condition will be settlement of the unbonded lead shield at the end opposite the point of impact.

For the side drop, local flat-tenino will be evaluated.

For the corner droo, the most critical

-3 conditinn will be the lid closure.

In addition to the analysis presented, a full scale drop test was also conducted (Reference' Section 1.6.6.3 and Appendix 1.10.3)

1. 6. 6.1 Flat End Drop The evaluation of flat end impact upon settlement of lead shielding closely follows Shappert's approach for a cylindrical load shield, outlined in Section 2.7.3 of his Cask Designer's Guide, ORNL-MSIC-68, February 1970.

The lead settlement di stance is given by:

RWH AH =

2 2

cl' ( R

- r ) (t e-

+ Re pb) s s

i Where:

aH = Settlement depth (in)

H = Drop height (in)

R = Outer lead radius (in)

W = Weight of Lead (lbs)

.' i

~4 r = Inner lead radius (in) l t

t

= Thickness of external steel shell (in) s 7 s = Steel dynamic flow stress (psi)

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"pb = Lead dynamic flow stress (psi) i x

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RLvision

  • Juna 6, 1980 Appendix 1.10.2 Test Repor.t, Corner Drop 1.0 Purpose The purpose of the drop test was to evaluate the effects of a 4 6' corner drop on the lid.

2.0 Test Set-up The test artical was a NuPac-50 2.5L cask manufactured from A-36 material.

New gaskets were installed and the cask was pressure tested to 7.2 psig for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

No loss of pressure was recorded.

A standard NuPac 50 cubic foot, snap-on lid liner, was filled with 4000 lbs.of wet sand.

The liner plus the sand payload totaled 4200 lbs. The liner was also pressure tested, with no loss of pressure noted.

Upon completion of the pressure test the liner was placed in the cask and transported to the drop site.

The drop pad was constructed in 1973 for Type "B" testing of the 37,500 lb. Paducah Tiger (C of C No. 6553).

It consists of a 2" thick steel plate grouted onto a massive reinforced concrete pad.

The pad closely approximates the " unyielding surface".

3.0 Drop Test A heavy steel lug was welded to the bottom corner of the cask such that the c.g. will be directly above a corner tab on the cask lid.

In order to provide an era of conservatism the N.R.C. suggested that the regulation. height of 36" be increased by 25%.

Therefore the cask was raised to a height of 45" and released.

1-34

Ravicion

  • June 6, 1980 4.0 Test Results The analysis conducted in Section 1.6.6.3 Pg 9-22a1 predicted local corner deformation of 1.25 to 1.40".

From the attached phcto's it can be seen that the actual deformation was 1.30".

There was no indication of brittle fracture or cracking of any kind.

Temperature of the cask was 51 F.

Damage was restricted ed to the cask lid corner.

After the drop, the cask was sub'-

jected to the same differental and freon test.

No leakage was detected.

On removal of the lid the gasket and spacer ring were uneffected.

Local deformations of the lid in the area of the spacer ring were matched by local deformations in the cask lip.

Using a straight edge these deformations were limited to less than.06 over 8" of length. See attached figure.

Since this deformation matched the lid configuration the seal remained unaffected.

The liner was removed and tested.

No leakage was noted.

From the photos it can be seen that liner suffered minimal damage.

Deformations were only slightly larger than those allowed by normal ma.ufacturing tolerances.

Figure 1.10.3.1 Corner Deformation a

o i 2" i 4' 5' 4"h

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1 Revision.

June 6, 1980

-4.0 Test Results The analysis conducted in Section 1.6.6.3 Pg 9-22a1 predicted local corner deformation of 1.25 to 1.40".

From the attached photo's it can be seen that the actual deformation was 1.10".

There was no indication of brittle fracture or cracking of any kind.

Temperature of the cask was 51 F.

Damage was restricted l

ed to the-cask lid corner.

After the drop, the cask was sub-jected to the same differental and freon test.

No leakagg was detected.

On removal of the lid the gasket and spacer ring were uneffected.

Local ~ deformations of the lid in the area of the spacer ring were natched by local deformations in the cask lip.

Using a straight edge these deformations were limited to less than.06 over 8" of length. See attached figure.

Since this deformation matched the lid configuration the' seal remained unaffected.

The liner was renoved and tested.

No leakage was noted.

From the photos it can be seen that liner suffered minimal damage.

Defornations were only slightly larger than those allowed by normal-manufacturing tolerances..

Figure 1.10.3.1 Corner Deformation a

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