système d'arrosage

OBS: mécanisme d'aspersion : terme extrait du Glossaire de l'énergie nucléaire (1992) et reproduit avec l'autorisation de l'OCDE.

CONT: Inside the building housing a reactor which is undergoing a major nuclear accident, internal steam pressure can be greatly reduced by using a dousing system to condense the steam. All CANDU reactors are provided with such a dousing system. It is much more difficult to reduce the pressure from non-condensable gases which are formed in great quantities during meltdown.
CONT: The Containment System forms a continuous, pressure-confining envelope around the reactor core and primary heat-transport system. In the CANDU 6 design it consists of a pre-stressed, post-tensioned concrete structure, an automatically-initiated dousing system, building coolers, and a filtered air discharge system. In Ontario Hydro's multi-reactor designs, containment includes a vacuum building connected to all reactor vaults in the plant, with its own dousing system for reducing internal pressure.