Control clusters and their control mechanisms
Maintenance of nuclear power plants (NSSS components)
Quizzed article REF: BN3296 V1
Control clusters and their control mechanisms
Maintenance of nuclear power plants (NSSS components)

Author : Jean-Pierre HUTIN

Publication date: November 10, 2017, Review date: April 26, 2021 | Lire en français

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4. Control clusters and their control mechanisms

4.1 Design and manufacturing

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4.1.1 Reactivity control

Controlling reactivity means controlling the nuclear reaction by absorbing some of the neutrons produced. The operator has two ways of doing this:

  • boric acid diluted in the primary circuit water, the concentration of which is varied;

  • control clusters that can be inserted or removed from fuel assemblies.

The bunches are suspended from a rod which...

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