Some BNI* decommissioning work uses standard techniques, albeit adapted to a nuclear environment. However, certain operations require innovative technologies and tools (robotics, virtual reality, remote-operation, new decontamination processes, etc.), which are specially developed to replace humans in irradiating or inaccessible environments, or to address complex needs on a case by case basis. Round-up of some of the practices used. Using specific tools or technologies CUTTING TOOL DESIGNED FOR DECOMMISSIONING In the auxiliaries cavern, an operator remotely controls the decommissioning operations on contaminated vessels. View on the control screen of a vessel being cut. Here in the Chooz A NPP. ©Philippe Dureuil/Médiathèque IRSN OPERATORS WORKING IN A CONTAMINATED ZONE WEARING A VENTILATED HAZMAT SUIT The ventilated hazmat suit, connected to a breathable air generating unit, is at a slight overpressure by comparison with the contaminated outside environment; it enables the operator to breathe and protects them from any contamination. ©C.Jandaureck/Cadam/ CEA – CEA Valduc * See glossary page 30 DECOMMISSIONING OF THE CHOOZ A REACTOR PRESSURE VESSEL Demolition worksite. Raising and removal of the reactor pressure vessel closure head. ©EDF 22 • Les cahiers de l’ASN • June 2022 BNIs BEING DECOMMISSIONED
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