UX-30 UF6 OVERPACK
LIQUI-RAD TRANSPORT UNIT
FUEL ASSEMBLY PACKAGES
PACKAGING FOR TRANSPORTATION OF UO2

UX-30 UF6 OVERPACK

UX-30 UF6 Overpacks offer durability, reliability and strength for the shipment of Model 30B Uranium Hexafluoride cylinders.

This overpack design utilizes a tough closed-cell polyurethane foam and stainless steel construction with sufficient strength for shipping UF6 cylinders without the use of a valve protection device.

The UX-30 is a stainless steel overpack nestled in a quick-opening transport cradle. The quick opening lock-pin and hinged restraint system is highly effective for loading and unloading cylinders.

New UX-30 overpacks are now under production, and CHT can accelerate production to meet whatever demand you may have.

We offer repair, refurbishment and re-certification services for existing UX-30 overpacks now in use. CHT also carries a complete selection of replacement parts for the UX-30.

LIQUI-RAD TRANSPORT UNIT

The LR-230 Package is designed to transport Type B quantities of fissile uranyl nitrate solutions. The package uses thermal and impact limiting systems to protect the containment vessel and prevent the contents from being released. The primary structural components of the LR-230 packaging consist of a stainless steel containment vessel, a carbon steel outer vessel and a carbon steel framing system.

The Liqui-RAD Transport Unit is a cylindrical package set in a rectangular angle frame having a foot print of 56″ x 56″ and a height of 73″.

The outer vessel is constructed of welded 10 gauge carbon steel. The containment vessel is constructed of 1/4″ thick 304 or 316 stainless steel with 1/4″ thick flanged and dished heads.

The containment vessel, although not stamped as such, is built in accordance with the ASME Pressure Vessel Code (Section VIII, Division I) and is rated for an internal pressure of 50 psig and an external pressure of 30 psig.

Lightweight, closed-cell foam insulation and ceramic insulation are sandwiched between the containment vessel and outer shell to provide thermal insulation and limit impact effects. These insulation materials are inflammable and non-reactive with the steel components of the vessels.

FUEL ASSEMBLY PACKAGES

Traveller Protective Shipping Containers and Clamshell for PWR Fuel Assemblies

CHT has fabricated over 393 of these packages for Westinghouse over the past seven years. Although fabricated from a slightly heavier gauge of stainless steel (7 Ga. to 18 Ga.), these packages required very unique and precise tooling due to the double-sided hinge opening and the interchangeability requirement for the internal aluminum clamshell fuel container. Using CHT’s state-of-the-art welding equipment and tooling designs, the fabrication of these units has been completed with 100% QA acceptance.

RAJ II BWR Fuel Assembly Package

CHT has fabricated over 600 of these packages for AREVA and Global Nuclear Fuels (GNF). CHT’s market share is based upon unique welding and fabrication skills. The very light gauge of stainless steel materials (from 1 mm to 10 mm) utilized for these packages demands precision tooling and the absolute lowest heat input to avoid deformation and maintenance of tolerances. The welding processes used to achieve this include state-of-the-art pulse TIG and MIG equipment. Because of CHT’s tooling and welding processes, all of the internal sub-assemblies, as well as the inner container, are interchangeable, allowing for highly efficient manufacturing.

MAP-12 Package

The MAP-12 package, fabricated for AREVA, is designed to transport two fuel assemblies with core components. The base consists of a fixed stainless steel strong-back to support the fuel assemblies and a neutron moderator and absorber are positioned directly beneath between inner stiffeners. Exterior to the cover is a layer of rigid polyurethane foam and an outer shell of 11-gauge stainless steel. Four stainless steel outer stiffeners support the package base. Using CHT’s state-of-the-art welding equipment and tooling designs, the fabrication of these units was completed with 100% QA acceptance.

PACKAGING FOR TRANSPORTATION OF UO2

The CHT-OP-TU is designed for shipment of Type A or Type B fissile radioactive material in solid form including oxides, carbides, silicates or other compounds of uranium.

The package has been extensively tested to verify its conformance with the requirements of 10 CFR 71 for shipment of these materials. The package is designed in a geometrically controlled configuration, and criticality evaluations in this report assume that water does leak into the inner storage vessels. Water-tightness of the storage vessels, therefore, is not assumed for the purpose of maintaining criticality safety.

• CHT is capable of fabricating any U02 package in accordance with 10 CFR 71 or comparable competent authority regulation.
• CHT produces OP-TU (USA/ 9288 / AF-85) for Global Nuclear Fuels America
• Stainless and carbon steel construction
• Rigid polyurethane impact and thermal systems are available as injected, molded and precision machined components. Multiple densities are available from 6 to 70 pct.

The overall dimensions of the CHT OP-TU are 45″x45″x62″ high. The transport unit is an insulated overpack with four sleeves to accommodate the Oxide Vessels. Each sleeve has its own insulated lid secured with twelve, 1/2″ bolts. The total gross weight of the CHT OP-TU is 3,757 lbs (1,704 kg) of which 1,608 lbs (729 kg) is payload.

The transport Unit is optionally constructed of 11 ga carbon or stainless steel, with polyurethane or low-chloride phenolic foam insulation. The internal steel surfaces of the Transport Unit are lined with ceramic fiber insulation (paper or board). Any external carbon steel surfaces are protected from weathering using an epoxy coating.

The four Oxide Vessels are constructed of stainless steel. Several diameters of the Oxide Vessel are available to carry the various payloads. Each vessel has its own lid. Both the Type A and Type B vessels use a double 0-ring seal. All vessels are secured with eight 1/2″ stainless steel bolts.

The CHT OP-TU is provided with lifting shackles on the upper frame of the Transport Unit, and tie down points at the Transport Unit feet. The CHT OP-TU can also be handled using a fork lift, since the feet server as location guides and the bottom of the unit is 1/4″ thick plate steel. Shielding and pressure relief devices are not required for the the CHT OP-TU payloads. Plastic plugs, designed to vent any combustion products generated by the foam insulation under hypothetical accident conditions, are located on the exterior of the Transport Unit. The payload maximum allowable decay heat of 10.3 W/m3 is negligible; thus, there is no need for heat dissipation mechanisms or coolants. The containment boundary is the individual Oxide Vessel, Oxide Vessel lid and 0-ring seal.