Text

Meeting Slides for Pre-Application Meeting on 04/16/2019 to Discuss Proposed Revisions to Model Nos. Tupact and Halfpact
	ML19101A436
Person / Time
Site:	07109218, 07109279
Issue date:	04/16/2019
From:	Stephen Burns, Porter S, Sellmer T; Nuclear Waste Partnership
To:	; Office of Nuclear Material Safety and Safeguards
	Garcia-Santos N (301) 415-6999
References
	Download: ML19101A436 (44)
	v • d • e

Design, Testing, and Certification of Four New Shielded Containers April, 16 2019 Presented by:

Todd Sellmer, Mgr. Packaging & Information Systems Scott Burns, Project Manager Steve Porter, Design Engineer

Summary Overview WIPP Background Present the Need for Additional Methods for Transporting RH-TRU Waste Design Requirements/Objectives Approach similar to original Shielded Container Assembly (SCA)

(currently approved) Testing and Certification Process Four (4) New Shielded Container Designs for 30- and 55-Gallon Drums Payload Assembly includes ancillary dunnage Planned Certification Tests and Bounding Conditions

- DOT Specification 7A, Type A, 4-Foot Drop Tests

- HAC 30-Foot Free-Drop Tests 10 CFR 71 safety evaluations (Thermal, Shielding, & Criticality)

Interim Design Parameters Schedule 2

WIPP Background 3

WIPP Background (Continued)

Contact Handled (CH) waste emplaced in stackable containers placed on the floor

Remote Handled (RH) waste emplaced in drilled boreholes in the Rib (or shielded containers) on the floor 4

Need for Additional Shielded Options

Following the events of February 14, 2014, the WIPP Site has been operating with greatly reduced ventilation in the underground facilities (from 425K CFM to 120K CFM).

Due to the condition of the underground after the event, concerns relative to airborne contamination during borehole drilling required for WIPP emplacement of RH waste in RLCs have halted the shipment of RH waste in RH-TRU 72B casks.

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Need for Additional Shielded Options (Continued)

Until the new permanent ventilation system and new utility shaft is completed (projected in FY2025), there are no plans for RH borehole drilling.

RH-TRU 72-B shipments of RH-TRU waste in RLCs cannot be received at WIPP because RLC emplacement has been halted.

This has greatly impacted the storage capacity of the DOE TRU waste facilities across the complex, relative to RH waste.

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Need for Additional Shielded Options (Continued)

The currently approved SCA (SC-30G1) authorized for use with issuance of CoC 9279, Revision 5, in May of 2009 has proven beneficial to the DOE, however:

- The majority of the currently packaged RH waste is in 55-gallon drums, or the activity is greater than can be accommodated with the currently authorized SCA (SC-30G1).

- Due to the delay of future 72B shipments, the need for additional shielded options for the shipment of RH waste is vital to the continued waste emplacement without the need for mining boreholes.

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Benefits of Additional Shielded Containers

Similar to the currently approved SCA (SC-30G1), these additional shielded containers allow for the following advantages;

- More efficient method for emplacing RH waste at WIPP

- Overall reduction in the number of RH waste shipments required in a RH-TRU 72B by as much as 2:1

- Reduced number of shipments to WIPP equates to a reduced potential for shipping accidents

- Will allow for an accelerated clean-up of generator sites

- Accelerated clean-up provides for risk reduction at generator sites 8

Benefits of Additional Shielded Containers (Continued)

Additional authorized shielded containers will allow generator sites to store and manage RH waste as CH waste without a need to repackage prior to shipment.

These additional shielded containers offer a significant benefit to the complex; the potential for increased efficiencies, gains in worker and public health and safety makes these additional shielded containers an important initiative to pursue for approval.

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Design Requirements/Objectives

Shielded containers shall be DOT Specification 7A, Type A certified, and equipped with filter vents

- Consistent with currently authorized HalfPACT TRU waste payload containers

- DOT 7A, Type A, 4-foot free drop of bare container onto an unyielding surface in worst-case orientation is primary testing constraint

- Drop-test acceptance is primarily based on demonstrating confinement of payload and no significant decrease in shielding effectiveness 10

Design Requirements/Objectives (Continued)

Current package (HalfPACT) design and licensing bases and limits shall be maintained

- Maximum package payload weight

7,600 lbs (HalfPACT)

- Maximum package decay heat:

30 watts (HalfPACT)

- Maximum Pu-239 fissile gram equivalent (FGE):

325 FGE (HalfPACT) 11

Similarities to Previous Testing Activities The designs of the new shielded containers and polyurethane foam-filled dunnage are similar to the SCA (SC-30G1) design approved for transport in the HalfPACT package 12

Four (4) New Designs The new designs predominately address gamma shielding

- Two (2) for 30-gallon drum payloads

SC-30G2 (two per HalfPACT package)

SC-30G3 (one per HalfPACT package)

- Two (2) for 55-gallon drum payloads

SC-55G1 (two per HalfPACT package)

SC-55G2 (one per HalfPACT package) 13

SC-30G2 Carbon steel per ASTM A516, Grade 70 (plate), or ASTM A266, Grade 2 (forging), normalized to fine grain practice for the lid base, flange, and shells Nominally, 2-inch thick lead and 5/8-inch thick steel in the sidewall, 3-inch thick laminated lead/steel lid, and 3-inch thick laminated lead/steel base 12, 5/8-inch Grade 8 closure bolts Silicone rubber gasket Filtered vent port Sidewall lead gamma scanned; lid and base lead plates ultrasonically inspected; container welds visually examined Nominal empty weight: 2,610 pounds Shipped via HalfPACT (2 per package) 14

SC-30G3 Carbon steel per ASTM A516, Grade 70 (plate), or ASTM A266, Grade 2 (forging), normalized to fine grain practice for the lid, base, flange, and shells Nominally, 3-inch thick lead and 1-inch thick steel in the sidewall, 63/4-inch thick laminated lead/steel lid, and 53/4-inch thick laminated lead/steel base 12, 3/4-inch Grade 8 closure bolts Silicone rubber gasket Filtered vent port Sidewall lead gamma scanned, lid and base lead plates ultrasonically inspected; container welds visually examined Nominal empty weight: 5,750 pounds Shipped via HalfPACT (1 per package) 15

SC-55G1 Carbon steel per ASTM A516, Grade 70 (plate), or ASTM A266, Grade 2 (forging), normalized to fine grain practice for the lid, base, and shell Nominally, 2.2-inch thick solid steel sidewall, 2.4-inch thick solid steel lid, and 2.35-inch thick solid steel base 12, 5/8-inch Grade 8 closure bolts Silicone rubber gasket Filtered vent port with lead shield plug Welds visually examined Nominal empty weight: 2,810 pounds Shipped via HalfPACT (2 per package) 16

SC-55G2 Carbon steel per ASTM A516, Grade 70 (plate), or ASTM A266, Grade 2 (forging), normalized to fine grain practice for the lid, base, flange, and shells Nominally, 2-inch thick lead and 1-inch thick steel in the sidewall, 53/4-inch thick laminated lead/steel lid, and 41/4 -inch thick laminated lead/steel base 12, 3/4-inch Grade 8 closure bolts Silicone rubber gasket Filtered vent port Sidewall lead gamma scanned, lid and base lead plates ultrasonically inspected; container welds visually inspected Nominal empty weight: 5,900 pounds Shipped via HalfPACT (1 per package) 17

Ancillary Dunnage and Payload Configurations SC-30G2

Axial and radial dunnage

Slip sheet and spaceframe pallet

Payload assembly consists of two units

Shipped in HalfPACT 18

Ancillary Dunnage and Payload Configurations (Continued)

SC-30G3

Upper and lower lateral dunnage

Dunnage adapter endcaps

Spaceframe pallet

Payload assembly consists of one unit

Shipped in HalfPACT 19

Ancillary Dunnage and Payload Configurations (Continued)

SC-55G1

Radial dunnage

Slip sheet and spaceframe pallet

Payload assembly consists of two units

Shipped in HalfPACT 20

Ancillary Dunnage and Payload Configurations (Continued)

SC-55G2

Upper and lower lateral dunnage

Spaceframe pallet

Payload assembly consists of one unit

Shipped in HalfPACT 21

Certification Tests and Bounding Conditions

DOT Specification 7A, Type A

- Each shielded container will meet DOT Specification 7A, Type A

- Bounding 4-foot drops will be conducted on the payload containers and orientations, as described

HAC Free-Drop Tests

- Each shielded container payload assembly will be drop tested with the appropriate dunnage inside a test surrogate HalfPACT inner containment vessel (ICV), as described foot drops will be conducted on the payload assemblies and orientations, as described 22

Certification Tests and Acceptance Criteria

Drop-test acceptance is primarily based on demonstrating confinement of payload and no significant decrease in shielding effectiveness

- No release of contents verified by scanning for fluorescein/flour release

- For lead lined containers (SC-30G2, SC-30G3, and SC-55G2), pre-and post-drop test gamma scans to ensure no significant decrease in shielding

- For non-lead lined containers (SC-55G1), permanent deformations will be added to shielding models and compared to the original (vs 20%)

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DOT Specification 7A, Type A Testing SC-30G2

Two prototype units will be used for Type A testing

Four drop test scenarios will be conducted 24

DOT Specification 7A, Type A Testing (Continued)

SC-30G3

Two prototype units will be used for Type A testing

Four drop test scenarios will be conducted 25

DOT Specification 7A, Type A Testing (Continued)

SC-55G1

One prototype unit will be used for Type A testing

Two drop test scenarios will be conducted 26

DOT Specification 7A, Type A Testing (Continued)

SC-55G2

Two prototype units will be used for Type A testing

Four drop test scenarios will be conducted 27

HAC Free-Drop Tests Two test articles will be drop tested to support HAC testing

Two HalfPACT test surrogate ICVs will be tested.

The bottom of each test article will be reinforced with stiffeners to ensure the end drops will result in higher acceleration loads to the shielded containers than if inside an impact-attenuating outer containment assembly (OCA).

Each test scenario will bound two of the shielded container payload assemblies, so testing will be performed only on those payload assemblies, as described.

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