A Study on Vitrification for LLW Radioactive Wastes - 16235
- Central Research Institute, Korea Hydro and Nuclear Power (Korea, Republic of)
- Yokohama Engineering Center, IHI Corporation (Japan)
Ash and ion exchange resin wastes to be vitrified were considered among various radioactive wastes in the Japanese nuclear industry. The appropriate glass composition for the waste is calculated using the computer program. The glass composition is systematically studied using a ternary diagram, considering viscosity, electrical conductivity, and durability. The optimized glass composition based on calculated parameters of vitrification process and the convenience of mixing wastes is selected for crucible experiment. Since differences between calculated values and measured values may occur upon evaluation of glass formulations using glass formulation computer simulation program, the calculated glass formulations should be verified through experiments on a laboratory scale for more meticulous development of glass formulations. For the follow-up development of glass formulations, several glass formulations are planned to be developed. The candidate glasses for treatment of ash and ion exchange resin were melted and fabricated using reagents, respectively. The chemicals were weighed out to produce the desired batch compositions and mixed thoroughly and then put into clay crucibles for melting. Next, the crucibles were introduced into an electric furnace at 1,150 deg. C in the ambient atmosphere and pressure with occasional stirring by a quartz rod. A hold time of 1 hour was introduced to promote homogenization. Finally, the melted material was poured on a graphite plate to be rapidly cooled. The viscosities of all fabricated glasses were in the desired range. After rapid cooling, the micro-structure of the glasses was analyzed using the SEM. They exhibited amorphous structure with good homogeneity. (authors)
- Research Organization:
- WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
- OSTI ID:
- 22838099
- Report Number(s):
- INIS-US-19-WM-16235; TRN: US19V1292083454
- Resource Relation:
- Conference: WM2016: 42. Annual Waste Management Symposium, Phoenix, AZ (United States), 6-10 Mar 2016; Other Information: Country of input: France; 4 refs.; available online at: http://archive.wmsym.org/2016/index.html
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CLAYS
COMPUTERIZED SIMULATION
ELECTRIC CONDUCTIVITY
GLASS
GRAPHITE
HARDNESS
ION EXCHANGE
LOW-LEVEL RADIOACTIVE WASTES
MELTING
MICROSTRUCTURE
NUCLEAR INDUSTRY
SCANNING ELECTRON MICROSCOPY
SERVICE LIFE
VISCOSITY
VITRIFICATION
WEAR RESISTANCE