CPC Subgroup
G21C 3/18 Internal spacers or other non-active material within the casing, e.g. compensating for expansion of fuel rods or for compensating excess reactivity (interlayers G21C3/20)
Full Title
Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements > Fuel elements > Constructional details > Details of the construction within the casing > Internal spacers or other non-active material within the casing, e.g. compensating for expansion of fuel rods or for compensating excess reactivity (interlayers G21C3/20)