Abstract:
The invention relates to a method and a system for controlling and optionally shutting down the power of a nuclear reactor. The control system comprises regulating systems which operate on a neutron-absorption basis and use mobile neutron absorbing bodies. According to the invention a system of holes and channels can be filled with neutron absorbing bodies to a required level by the force of gravity.
Abstract:
The invention relates to a reactor with a system or systems for controlling the regulation and the cutoff of a power output on the basis of neutron absorption using motile neutron absorber bodies. The invention also relates to a method of regulating the output of a nuclear reactor, and to absorber bodies that are adapted to the method and to a regulating system. According to the invention, spherical absorber bodies such as SAS are used in guides in the reflector in such an arrangement that a maximum neutron absorption is achieved adjacent to areas of a maximum output of the core and a reduced or zerovalent absorption in areas where the output of the core is reduced.
Abstract:
The invention relates to a method and a control system for controlling and possibly shutting down the power of a nuclear reactor. Regulation of the control system is based on neutron absorption using mobile neutron absorbing bodies as well as weakly neutron absorbing bodies, non-absorbing bodies or reflecting bodies. Said bodies are movably positioned in the hollow spaces of the active zone of the reactor.
Abstract:
A high-temperature nuclear reactor, cooled by a liquid fluoride salt, is described. The reactor uses an annular fuel pebble comprised of an inert graphite center kernel, a TRISO fuel particles region, and a graphite outer shell, with an average pebble density lower than the density of the liquid salt so the pebbles float. The pebbles are introduced into a coolant entering the reactor and are carried into the bottom of the reactor core, where they form a pebble bed inside a plurality of vertical channels inside one or more replaceable Pebble Channel Assemblies (PCAs). Pebbles are removed through defueling chutes located at the top of each PCA. Each PCA also includes channels for insertion of neutron control and shutdown elements, and channels for insertion of core flux mapping and other instrumentation.
Abstract:
The invention relates to a method and a system for controlling and optionally shutting down the power of a nuclear reactor. The control system comprises regulating systems which operate on a neutron-absorption basis and use mobile neutron absorbing bodies. According to the invention a system of holes and channels can be filled with neutron absorbing bodies to a required level by the force of gravity.
Abstract:
The invention relates to a reactor with a system or systems for controlling the regulation and the cutoff of a power output on the basis of neutron absorption using motile neutron absorber bodies. The invention also relates to a method of regulating the output of a nuclear reactor, and to absorber bodies that are adapted to the method and to a regulating system. According to the invention, spherical absorber bodies such as SAS are used in guides in the reflector in such an arrangement that a maximum neutron absorption is achieved adjacent to areas of a maximum output of the core and a reduced or zerovalent absorption in areas where the output of the core is reduced.