Criticality belt

The criticality belt is worn around the waist by everyone working in a high-risk area. In certain facilities, the risk of a criticality accident (uncontrolled excursion into a fissile medium) may exist, accompanied by the emission of potentially intense neutron and gamma radiation.

This risk may be present in laboratories and fuel cycle plants, in research reactors, as well as in the transportation of fissile materials and certain types of waste. The criticality belt provides precise information on the orientation of radiation emissions received by the wearer in the event of a criticality incident at a nuclear site.

Knowing the orientation enables the doses provided by the chest dosimeter to be corrected, and the doses delivered to organs and the body to be estimated as accurately as possible using accident reconstruction methods.

Adjustable, it comes in 2 models to suit the wearer’s size

The Lemer Pax criticality belt is two-tone on the outside, with the green color always to the right of the wearer.

Black ebonite pellets allows for the radiation dose received

The criticality belt contains 6 black ebonite pellets distributed around the individual, whose sulfur activation is measured to determine the dose received by each pellet and thus define the worker’s orientation during the accident.

The pellets each have 1 to 6 notches, enabling them to be identified during measurement. They are inserted into the compartments inside the belt, in a precise order.