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Title: TRITIUM HYDRIDE TRANSPORT VESSEL DESIGN AND FABRIACTION

Authors:
; ;
Publication Date:
Research Org.:
SRS
Sponsoring Org.:
USDOE
OSTI Identifier:
1281772
Report Number(s):
SRNL-L4500-2016-00094
DOE Contract Number:
DE-AC09-08SR22470
Resource Type:
Conference
Resource Relation:
Conference: INMM 2016
Country of Publication:
United States
Language:
English

Citation Formats

Blanton, P., Eberl, K., and Abramczyk, G.. TRITIUM HYDRIDE TRANSPORT VESSEL DESIGN AND FABRIACTION. United States: N. p., 2016. Web.
Blanton, P., Eberl, K., & Abramczyk, G.. TRITIUM HYDRIDE TRANSPORT VESSEL DESIGN AND FABRIACTION. United States.
Blanton, P., Eberl, K., and Abramczyk, G.. 2016. "TRITIUM HYDRIDE TRANSPORT VESSEL DESIGN AND FABRIACTION". United States. doi:. https://www.osti.gov/servlets/purl/1281772.
@article{osti_1281772,
title = {TRITIUM HYDRIDE TRANSPORT VESSEL DESIGN AND FABRIACTION},
author = {Blanton, P. and Eberl, K. and Abramczyk, G.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 7
}

Conference:
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  • Sandia National Laboratories (SNL) has designed an impact-limiting system for a small, lightweight radioactive material shipping container. The Westinghouse Savannah River Company (WSRC) is developing this Type B package for the shipment of tritium, replacing the outdated LP-50 shipping container. Regulatory accident resistance requirements for Type B packages, including this new tritium package, are specified in 10 CFR 71 (NRC 1983). The regulatory requirements include a 9-meter free drop onto an unyielding target, a 1-meter drop onto a mild steel punch, and a 30-minute 800{degrees} C fire test. Impact limiters are used to protect the package in the free-drop accidentmore » condition in any impact orientation without hindering the package`s resistance to the thermal accident condition. The overall design of the new package is based on a modular concept using separate thermal shielding and impact mitigating components in an attempt to simplify the design, analysis, test, and certification process. Performance requirements for the tritium package`s limiting system are based on preliminary estimates provided by WSRC. The current tritium hydride vessel (THV) to be transported has relatively delicate valving assemblies and should not experience acceleration levels greater than approximately 200 g`s. A thermal overpack and outer stainless steel shell, to be designed by WSRC, will form the inner boundary of the impact-limiting system (see Figure 1). The mass of the package, including cargo, inner container, thermal overpack, and outer stainless steel shell (not including impact limiters) should be approximately 68 kg. Consistent with the modular design philosophy, the combined thermal overpack and containment system should be considered essentially rigid, with the impact limiters incurring all deformation.« less
  • Titanium was selected for evaluation as a tritium storage material. Titanium-deuterium desorption isotherm data at 550, 600, 649, 700, ad 760 degrees C are presented and were used to evaluate storage vessel design loading limits.
  • Metal hydrides offer safe, compact and efficient ways to process tritium in areas including storage, pumping, compression, transportation and purification. Westinghouse at Savannah River Site in USA has developed and implemented metal hydride based technology for various tritium applications over the past 20 years. This paper presents our experience in designing different types of metal hydride vessels for tritium processing.
  • The Savannah River Site (SRS) tritium facilities have used 1{sup st} generation (Gen1) LaNi{sub 4.25}Al{sub 0.75} (LANA0.75) metal hydride storage beds for tritium absorption, storage, and desorption. The Gen1 design utilizes hot and cold nitrogen supplies to thermally cycle these beds. Second and 3{sup rd} generation (Gen2 and Gen3) storage bed designs include heat conducting foam and divider plates to spatially fix the hydride within the bed. For thermal cycling, the Gen2 and Gen 3 beds utilize internal electric heaters and glovebox atmosphere flow over the bed inside the bed external jacket for cooling. The currently installed Gen1 beds requiremore » replacement due to tritium aging effects on the LANA0.75 material, and cannot be replaced with Gen2 or Gen3 beds due to different designs of these beds. At the end of service life, Gen1 bed desorption efficiencies are limited by the upper temperature of hot nitrogen supply. To increase end-of-life desorption efficiency, the Gen1 bed design was modified, and a Thermal Enhancement Cartridge Heater Modified (TECH Mod) bed was developed. Internal electric cartridge heaters in the new design to improve end-of-life desorption, and also permit in-bed tritium accountability (IBA) calibration measurements to be made without the use of process tritium. Additional enhancements implemented into the TECH Mod design are also discussed.« less