Solidification of glass powder with simulated high-level radioactive waste during hydrothermal hot-pressing

Journal Article · Thu Feb 01 00:00:00 EST 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb06512.x· OSTI ID:7081732

Nishioka, M; Yanagisawa, K; Yamasaki, N ^[1]; Hirai, S ^[2]

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1. Kochi Univ. (Japan). Faculty of Science
2. Musashi Inst. of Tech., Kawasaki, Kanagawa (Japan). Atomic Energy Research Lab.

Borosilicate glass powder with simulated high-level radioactive waste (HLW) was solidified by a hydrothermal hot-pressing method. A leach test of the solid bodies was performed. Twenty-one elements composing the simulated HLW in the leachant were analyzed quantitatively by neutron activation analysis. The addition of Al(OH){sub 3}, up to 7.5% of the starting powder, reduced the leachability. The first densification of the starting powder during hydrothermal hot-pressing takes place by the rearrangement of particles, followed by solution-precipitation. The densification fits two types of rate equations. Activation energies obtained from two rate equations agree and are smaller than those of the glass without simulated HLW. The results indicate that simulated HLW in the starting powder acts to reduce the activation energy for densification during hydrothermal hot-pressing.

• OSTI ID: 7081732
• Journal Information: Journal of the American Ceramic Society; (USA), Vol. 73:2; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
BOROSILICATE GLASS
SOLIDIFICATION
HIGH-LEVEL RADIOACTIVE WASTES
HOT PRESSING
RADIOACTIVE WASTE PROCESSING
SIMULATION
ACTIVATION ENERGY
EQUATIONS
LEACHING
POWDERS
RADIOACTIVE WASTE DISPOSAL
SOLID SOLUTIONS
DISPERSIONS
DISSOLUTION
ENERGY
FABRICATION
GLASS
MANAGEMENT
MATERIALS
MATERIALS WORKING
MIXTURES
PHASE TRANSFORMATIONS
PRESSING
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SEPARATION PROCESSES
SOLUTIONS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
052002* - Nuclear Fuels- Waste Disposal & Storage
052001 - Nuclear Fuels- Waste Processing
360602 - Other Materials- Structure & Phase Studies
990200 - Mathematics & Computers