Pyrochlore glass‐ceramics fabricated via both sintering and hot isostatic pressing for minor actinide immobilization

2020 ◽  
Vol 103 (10) ◽  
pp. 5470-5479
Author(s):  
Yingjie Zhang ◽  
Zhaoming Zhang ◽  
Tao Wei ◽  
Linggen Kong ◽  
Young J. Kim ◽  
...  
Keyword(s):  
Hot Isostatic Pressing ◽  
Glass Ceramics ◽  
Minor Actinide ◽  
Isostatic Pressing

Investigation of Processing Parameters for the Consolidation of Actinide Glass-Ceramic Wasteforms by Hot Isostatic Pressing

MRS Advances ◽  
2016 ◽  
Vol 1 (63-64) ◽  
pp. 4269-4274 ◽  
Author(s):  
Stephanie Thornber ◽  
Paul Heath ◽  
Ewan Maddrell ◽  
Martin C. Stennett ◽  
Neil C. Hyatt
Keyword(s):  
Sample Preparation ◽  
Hot Isostatic Pressing ◽  
Glass Ceramics ◽  
Processing Parameters ◽  
Isostatic Pressing ◽  
Al Content ◽  
High Temperature Heat Treatment ◽  
Nuclear Decommissioning ◽  
Optimum Formulation ◽  
The Uk

ABSTRACTGlass-ceramics were developed initially for the immobilization of miscellaneous Pu-residues at the UK’s Sellafield site from which it was uneconomic to recover Pu for reuse. Renewed interest in the immobilization of a portion of the UK PuO2 stockpile has led to glass-ceramics being evaluated for bulk Pu immobilization. The Nuclear Decommissioning Authority (NDA) in the UK have proposed hot isostatic pressing (HIP) as a potential consolidation technique for the processing of these wasteforms. In this study, zirconolite based glass-ceramics were investigated to determine an optimum formulation. The yield of zirconolite is shown to vary with glass composition and glass fraction, such that a higher Al content favours zirconolite formation. The sample preparation process is discussed to highlight the importance of a high temperature heat-treatment during sample preparation to achieve high quality HIPed wasteforms.

Investigation of Ce incorporation in zirconolite glass-ceramics for UK plutonium disposition

MRS Advances ◽  
2017 ◽  
Vol 2 (13) ◽  
pp. 699-704 ◽  
Author(s):  
Stephanie M. Thornber ◽  
Martin C. Stennett ◽  
Neil C. Hyatt
Keyword(s):  
Glass Ceramic ◽  
Perovskite Phase ◽  
Hot Isostatic Pressing ◽  
Glass Ceramics ◽  
Ceramic Phase ◽  
Isostatic Pressing ◽  
Preliminary Work

ABSTRACTCerium incorporation in zirconolite glass-ceramic systems, consolidated by hot isostatic pressing, was investigated. Samples were formulated to target Ce incorporation on the Ca and / or Zr sites. Results show successful incorporation of Ce into the ceramic phase although complete waste digestion was not achieved. The formation of a Ce-bearing perovskite phase when targeting Zr substitution, was associated with reduction of Ce4+to Ce3+. This study is part of preliminary work towards fabricating Pu-bearing glass-ceramic HIP samples.

Combination of hot isostatic pressing and subsequent heat treatment for additively manufactured Zr-1Mo components

2021 ◽  
Vol 285 ◽  
pp. 129123
Author(s):  
Xiaohao Sun ◽  
Debao Liu ◽  
Minfang Chen ◽  
Weiwei Zhou ◽  
Naoyuki Nomura ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Hot Isostatic Pressing ◽  
Subsequent Heat Treatment ◽  
Isostatic Pressing
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