Packaging of radioactive waste by cementing
AssigneeAveva NC
InventorsDamien Avril, David Chartier, Jennifer Sanchez-Canet
Life of this patent
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Abstract
Using crystalline silica, mixed with cement powder, to reduce the heating of the cement paste caused by the hydration of said powder, during a process of packaging of radioactive waste, a formulation for the packaging of radioactive waste by cementing, which comprises such silica, a method for packaging radioactive waste implementing this formulation, and a package for packaging of radioactive waste which is obtained by this method.
Claims20
A method for reducing heating of a cement paste caused by hydration of a cement powder during a process of packaging radioactive waste by cementing, the method comprising:
- forming a cement mixture by mixing particles of silicon dioxide in crystalline form with the cement powder;
- and
- reducing heating of said cement mixture caused by hydration of the cement powder during a process of packaging radioactive waste by cementing,
- wherein at least 90% by number of said silicon dioxide particles have an average particle size ranging from 0.5 to 200 μm.
A composition for the packaging of radioactive waste by cementing, the composition comprising:
- (11.0±3.3)% by dry mass of radioactive waste;
- (35.5±4.0)% by mass of water;
- (44.0±5.0)% by mass of cement powder;
- and
- (9.5±3.1)% by mass of silicon dioxide in crystalline form, which takes the form of particles, at least 90% by number of which have an average particle size ranging from 0.5 to 200 μm.
Dependencies are inferred from the claim text.