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Fusion Science and Technology
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Glass strategy: Hanford’s enhanced waste glass program
The mission of the Department of Energy’s Office of River Protection (ORP) is to complete the safe cleanup of waste resulting from decades of nuclear weapons development. One of the most technologically challenging responsibilities is the safe disposition of approximately 56 million gallons of radioactive waste historically stored in 177 tanks at the Hanford Site in Washington state.
ORP has a clear incentive to reduce the overall mission duration and cost. One pathway is to develop and deploy innovative technical solutions that can advance baseline flow sheets toward higher efficiency operations while reducing identified risks without compromising safety. Vitrification is the baseline process that will convert both high-level and low-level radioactive waste at Hanford into a stable glass waste form for long-term storage and disposal.
Although vitrification is a mature technology, there are key areas where technology can further reduce operational risks, advance baseline processes to maximize waste throughput, and provide the underpinning to enhance operational flexibility; all steps in reducing mission duration and cost.
M. Ghate, A. Kumar, P. Charkhawala, N. Chauhan, S. Pradhan
Fusion Science and Technology | Volume 65 | Number 2 | March-April 2014 | Pages 255-261
Technical Paper | doi.org/10.13182/FST13-652
Articles are hosted by Taylor and Francis Online.
The effects of various fabrication processes, such as compaction and swaging, during the fabrication of a cable-in-conduit conductor on the mechanical and metallurgical properties of jacket material (SS316LN) are discussed in this paper. Microstructure analysis of various samples is carried out, and the change in microstructures has been studied using scanning electron microscopy image analysis. The variation in hardness for the jacket material is also tested after swaging and compaction operations. The jacket samples are tested for their tensile strength, reduction in area, elongation, and impact strength as per applicable American Society for Testing and Materials standards. The ultimate tensile strength (UTS) is observed to be decreased for a sample compacted to 733 MPa when compared to virgin samples. On the contrary, the UTS increased significantly up to 1027 MPa in swaged samples. There is no linear relationship between tensile strength of SS316LN after cold working operations. The effect of thermal shock on the mechanical and metallurgical properties of the jacket material is also investigated.