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Single-step multiple repositionings of control rod cluster assembly during each nuclear reactor fuel cycle

Image Number 3 for United States Patent #5066451.

A control rod cluster assembly of a nuclear reactor is repeatedly repositioned in a guide tube assembly above a fuel assembly in the reactor core in single steps at separate times during a single fuel cycle. For instance, the single-step repositioning can be repeated once every month or every four months in a twelve month fuel cycle.

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