Article | REF: BN3110 V1

Pressurized water reactors

Author: Jean-François PÉTÉTROT

Publication date: July 10, 2009, Review date: February 3, 2015

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4. Protective chains

Protections can be broken down into three groups according to their purpose:

  • nuclear boiler protection ;

  • generating set protection ;

  • water station protection.

4.1 Nuclear boiler protection

During the development of abnormal situations in the nuclear boiler, protection is provided by logic circuits which, depending on the case, trigger different protective actions:

  • automatic reactor shutdown ;

  • start-up of GV emergency feedwater ;

  • isolation of steam lines from the high-speed generator;

  • ...

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Protective chains