Context and challenges
Following the Fukushima accident, the French Nuclear Safety Authority issued technical regulations, one of which requires the entire nuclear fleet to be equipped with an "ultimate" emergency power source. This client, a leader in the nuclear industry, installs an Ultimate Diesel Generator (UDG) on all its reactors, except one which is shutting down. The latter are installed in "bunkered" buildings designed to resist the ultimate risks.
Each generator set will be assigned to a single production unit and will be in addition to the five existing electrical sources. Used in extreme situations, these generators will have an autonomy of 72 hours and will also make it possible to further secure the cold source for cooling the reactors. They are designed to withstand possible disasters (earthquakes, floods, tornadoes), which are much more important than those taken into account in the design of installations and during safety reassessments.
This client has entrusted Assystem with the monitoring and assistance in monitoring the tests of all the 56 UDG.