Abstract: An installation for very long term storage of products emitting a high thermal flux. The installation comprises a container (14), in which the products to be stored are placed, and an evaporator (22) surrounding the container, to evacuate the heat through a heat-pipe effect. The evaporator (22) comprises a jacket (28), pipes (32) integral with the jacket and filled with a coolant fluid such as water, and a system for tightening the evaporator (22) on the container (14). The arrangement is such that the evaporator (22) is not maintained in close contact with the container (14) except in front of the pipes (32). Advantageously, channels (42) are provided for air circulation by natural convention between the evaporator (22) and the container (14), on both sides of the pipes (32).

Abstract: An installation for very long term storage of products emitting a high thermal flux. The installation comprises a container (14), in which the products to be stored are placed, and an evaporator (22) surrounding the container, to evacuate the heat through a heat-pipe effect. The evaporator (22) comprises a jacket (28), pipes (32) integral with the jacket and filled with a coolant fluid such as water, and a system for tightening the evaporator (22) on the container (14). The arrangement is such that the evaporator (22) is not maintained in close contact with the container (14) except in front of the pipes (32). Advantageously, channels (42) are provided for air circulation by natural convention between the evaporator (22) and the container (14), on both sides of the pipes (32).

Abstract: A very long term storage installation for calorific products such as nuclear waste, comprises at least one closed cavity (10), in which at least one product confinement container is housed (14). To evacuate the heat released by the stored products, each container (14) is surrounded by a jacket (26) associated with a thermosiphon (24) whose cold source is formed of an air condenser provided above a slab (20) sealing the top part of the cavity. The jacket (26) is preferably interchangeable and tightly surrounds the container (14).