Lead-cooled fast reactor separable reactor core implementation scheme

Abstract

The invention relates to a reactor core separation method for a molten metal cooling reactor. The method is implemented mainly by an inner reactor core, an outer reactor core, an upper gird plate inside the reactor core, an upper grid plate outside the reactor core, a lower grid plate inside the reactor core, a lower grid plate outside the reactor core, an inner reactor core coaming, an inner reactor core support column and inner reactor core guide columns, wherein a fuel component is fixed through clamping of the upper and lower grid plates. According to the reactor core separation method provided by the invention, the buoyancy of molten metal to the fuel component is utilized, a reactor core can be lifted through the buoyancy after constraint of the fuel component is released, and thus the purposes that the reactor core is separated and a reactor is closed are achieved. By adopting the method provided by the invention, a redundancy auxiliary system serving as a reactor control rod for stopping a reactor can be also independently used, and then the purpose of closing the reactor can be achieved.

Description

technical field [0001] The invention belongs to the technical field of reactor safety and reactor design, and in particular relates to a core separation method of a heavy metal cooling reactor. Background technique [0002] According to the development goal of the fourth generation nuclear energy system proposed by the GIF forum, six reactor types with the most development potential were selected. Among them, the lead-cooled fast reactor has good nuclear waste transmutation and nuclear fuel value-added capabilities, and high Safe and economical, it was selected as one of the six reactor types by the GIF Forum. Lead-cooled fast reactors refer to fast neutron reactors cooled by liquid lead or lead-bismuth alloys, and were successfully used in nuclear submarine reactors in the former Soviet Union in the 1960s. However, due to the strong corrosion and high melting point of lead-based coolants (including lead and lead-bismuth alloys), extremely high requirements are placed on th...

AI Technical Summary

Problems solved by technology

Generally, the reactor is shut down by gravity through the shutdown rod, but for heavy metal reactors, if the density difference between the shutdown rod and the liquid metal is not very large, the insertion of the shutdown rod will be slow or impossible.

Images