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Inspection method for leaking fuel rods in fuel assemblies of boiling water reactors.
Inspection method for leaking fuel rods in fuel assemblies of boiling water reactors.
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机译:沸水反应堆燃料组件中燃料棒泄漏的检查方法。
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摘要
Fuel rods of fuel assemblies of a boiling water reactor are tested for leaks. A plurality of fuel assemblies are each arranged adjacent to one another in a cell of the upper core grid of the boiling water reactor. A hood is placed above a plurality of cells A water sample is taken from each of the cells, and the water samples from a plurality of cells forming a group are combined and tested for the presence of radioactive fission products A plurality of groups are analyzed simultaneously in a number, which number corresponds to the number of groups, of measurement channels. Where a result of a group is positive, the cells of the group are tested separately by the measurement channels. Those fuel assemblies of a cell that is found positive are tested individually outside the hood.
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