FIELD: physics, nuclear.
SUBSTANCE: invention relates to nuclear power, particularly to the technology of making rods of fuel kernes of cermet fuel elements. The solder for sealing a rod workpiece of the fuel kernel of a cermet fuel element of a nuclear reactor consists of a mixture of copper and zirconium powder in ratio (0.17-0.25):(0.83-0.75), consolidated by an organic binder. The copper powder has the fraction of 10-50 mcm and is selected from a batch with a main fraction of 5-10 mcm, and the zirconium powder has the fraction of 50-100 mcm and is selected from a batch with a main fraction of 100-140 mcm.
EFFECT: invention increases output of workpieces with suitable sealing.
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