METHOD FOR DISSOLVING NUCLEAR FUEL OF MILLED FUEL FUEL ASSEMBLIES AND A DEVICE FOR ITS IMPLEMENTATION

摘要

1. A method for dissolving nuclear fuel from crushed fuel assemblies (FA) of nuclear reactors, including loading crushed fuel assemblies, supplying reagents, dissolving fuel using reagents, washing undissolved pieces of reagents and subsequent unloading, including the operation of removing insoluble pieces of fuel assemblies by exposure to compressed gas, characterized in that the two-phase flow of fine abrasive particles, consisting of gas and said particles, formed during the implementation of the step of removing insoluble lumps, is transferred to a pulverized state, conditions for crushing said flow are created and side flows are formed in all directions. A device for implementing a method for dissolving nuclear fuel of crushed fuel assemblies of nuclear reactors according to claim 1, comprising an outer and an inner vessel forming an annular reaction cavity, a loading unit, a means for unloading, including a lattice partition with nozzles for supplying gas and removing insoluble waste fuel assemblies located in the lower part of the device under the reaction cavity, characterized in that the sublattice space is divided by partitions into at least four separate chamber sections, and each partition has a slotted overflow hole located at least two minimum dimensions of the said overflow opening from the bottom of the sublattice space located in the bottom of the device under the reaction cavity. 3. The device according to claim 2, characterized in that the overflow hole has a rounded shape, for example, an oval shape. The device according to claim 3, characterized in that the overflow hole in the partition is located