Metal Hydride Wall Stress Measurements on a Four-Inch Short (FISH) Bed

A Prototype Four-Inch Short Hydride (FISH) Bed as a Replacement Tritium Storage Bed

“…The first testing phase will be bed activation and confirmatory PV strain measurements during hydriding to verify previously obtained results. 5 Once the bed wall stresses have been confirmed to be within ASME allowable limits, an absorption/desorption test program similar to that performed for the Gen2 bed 3 will be conducted after the addition of the bed's outer jacket. Tests will also be conducted using the two gas filter tubes to determine operating scenarios for removal of inert gases during gas absorption processes.…”

“…Previous testing determined that schedule 40 pipe wall thickness was sufficient for the PV to meet ASME Section VIII, Division 1 pressure vessel code allowable design limits. 5 The use of a larger diameter PV for the Gen3 bed, containing the same mass of hydride as the Gen1 and Gen2 beds, results in a shorter bed length. The Gen3 bed length will facilitate heater cartridge replacement and reduce required glove box space for new bed deployments.…”

Air Passivation of Metal Hydride Beds for Waste Disposal

“…A prototype LaNi 4.25 Al 0.75 hydride storage bed (stress bed 01 or SB01) described in a previous publication 9 , was used for these air passivation study. SB01, a four-inch, short hydride (FISH) prototype vessel used for hydride induced wall stress measurements contained 9.66 kg of Ergenics Hy-Stor 210 ® LaNi 4.25 Al 0.75 hydride after the 2 nd hydride fill.…”

“…SB01, a four-inch, short hydride (FISH) prototype vessel used for hydride induced wall stress measurements contained 9.66 kg of Ergenics Hy-Stor 210 ® LaNi 4.25 Al 0.75 hydride after the 2 nd hydride fill. SB01 had four thermocouples (TCs) 9 : TC04 was inserted into the hydride material and entered the bed through its fill port, TC05 was within the bed heater cartridge, TC06 was attached to the exterior of the bed 5.7 cm (2.25 inches) from the end with the gas inlet tube, and TC07 was attached to the exterior of the bed 5.7 cm (2.25 inches) from the end with the fill port.…”

Hydriding-Induced Wall Stress Evaluation of a Prototype Four-Inch Short (FISH) Tritium Hydride Bed

“…The Savannah River Site (SRS) Tritium Facilities (TF) have used metal hydride beds to store, separate, transport, compress, and purify hydrogen isotopes for over 20 years. 1,2 The first generation (Gen 1) hydride beds utilize 12.6 kg of LaNi 4.25 Al 0.75 (or LANA.75) and require a hot and cold nitrogen (HCN) system for operation. The second generation (Gen 2) hydride bed uses the same pipe size and LANA.75 alloy as the Gen 1 bed but was developed to thermally swing the bed using electric heaters during desorption and forced atmosphere cooling during absorption.…”