Non-evaporable ternary gettering alloy, particularly for the sorption of water and water vapor in nuclear reactor fuel elements
AssigneeSaes Getters S.P.A.
InventorsAldo Barosi, Claudio Boffito
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Abstract
The scope of the present invention is the provision of a non-evaporable gettering ternary alloy particularly for the sorption of water and water vapor in nuclear reactor fuel elements. The ternary gettering alloy has a composition which when plotted on a ternary composition diagram in weight percent Zr, weight percent Ti and weight percent Fe lies within a polygon having as its corners the points defined by (a) 75% Zr--5% Ti--20% Fe (b) 60% Zr--5% Ti--35% Fe (c) 45% Zr--20% Ti--35% Fe (d) 75% Zr--20% Ti--5% Fe
Claims7
Method for the stoichiometric sorption of both oxygen and hydrogen from water which consists of contacting water with a non-evaporable ternary gettering alloy of Zr--Ti--Fe.
Method for the stoichiometric sorption of both oxygen and hydrogen from water which consists of contacting water with a non-evaporable ternary gettering alloy comprising Zr, Ti, and Fe having a composition which when plotted on a ternary composition diagram in weight percent Zr, weight percent Ti and weight percent Fe lies within a polygon having as its corners the points defined by:
- (a) 75% Zr--5% Ti--20% Fe
- (b) 60% Zr--5% Ti--35% Fe
- (c) 45% Zr--20% Ti--35% Fe
- (d) 75% Zr--20% Ti--5% Fe;
- wherein, the water pressure is less than 100 Torr;
- wherein, the gettering alloy has a temperature between 200.degree. C. and 350.degree. C. and is able to sorb up to 4% by weight of water;
- and
- wherein particles of the gettering alloy have a particle size between 25.mu.and 125.mu..
Dependencies are inferred from the claim text.