8. Unit shutdown
A nuclear reactor has to be shut down periodically to replace part of the fuel (every 12 or 18 months in France). These shutdowns are planned over a five-year period.
There are three types of shutdown: partial (or "periodic", VP), simple refuelling (ASR) and ten-yearly (VD).
Note :
The term "visit" normally refers to inspections to be carried out during a shutdown, but is often used to designate the shutdown itself.
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Unit shutdown