The former Expert Group on Heavy Liquid Metal Technology (EGLMH) was active for several years. Its main objective was to issue a handbook with a collection of theoretical approaches and experimental data in order to deliver relevant recommendations for the design of HLM nuclear systems. After the publication of the second version of the handbook, it was decided to expand the scope and objetives of the expert group to: i) include liquid sodium (Na) activities, and ii) go further in the assessment of available data to bring it closer to application in design, construction and licensing issues on the one hand, and operation, in-service inspection, handling and maintenance on the other hand. As a consequence, the name of the expert group was changed to “Expert Group on Reactor Coolants and Components Technology” (EGCoCoT). The new denomination indicates that not only the properties of the coolants themselves are covered but also the effects that a particular coolant has on reactor parts such as, but not limited to, structural materials, chemistry control, thermal hydraulics, component behaviour, safety issues etc.
Under the guidance of the Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC), the Expert Group on Reactor Coolants and Components Technology (EGCoCoT) undertakes activities with the goal to collect, evaluate and preserve relevant scientific data and to "translate" fundamental scientific understanding into application in support of i) the Development of construction codes used for design (design rules), ii) Key technical issues for licensing, and iii) Recommendations for Operation, Inspection and Handling.
The topical areas and objectives of the expert group are the following.
Environmental conditions and factors that affect materials behaviour relevant for the structural integrity of confinement barriers and components
Coolant and cover gas issues
Thermal-hydraulics for liquid metals
Former Expert Group on Liquid Metal Technology (EGLM) - replaced by EGCoCoT in 2021
The expert group monitored the feedback from version 0 of the Lead-bismuth eutectic (LBE) handbook, collected, analysed and checked the consistency of expected new results from ongoing heavy liquid metal-related programmes, and updated the handbook and released version 1.