Radial power flattening reactor core with square arrangement driven by external source

Abstract

The invention discloses a radial power flattening reactor core with square grid arrangement driven by an external source. The reactor core comprises, from core to outward, in a radial direction, an external neutron source region, a first fission fuel region with a low concentration, a second fission fuel region with a medium concentration, a third fission fuel region with a high concentration, a fourth fission fuel region with a higher concentration, a reflection region and a shielding region in turns. Based on the physical and thermohydraulic principle of coupled reactors, the arrangement of the reactor core with the square arrangement is subjected to a principle design analysis by adopting mathematic methods. Based on the design principle, the fuel regions are in a unique radial geometric layer arrangement with increasing concentrations from the interior to the exterior, the design principle of the each fuel region from a low concentration to a high concentration, an unique radial geometry layers arrangement is carried out from interior to exterior, and the radial power distributions of the fuel regions are flattened. The core has a good flattened radial power, high utilization rate of neutron, and simple structure arrangement has effect of effectively reducing the power peak factor caused by an external neutron source, and has high burnup and high generating efficiency.

Description

technical field [0001] The invention relates to a core design of a nuclear reactor, in particular to a design scheme of a reactor core with a square grid arrangement driven by an external source. Background technique [0002] At present, both the world and China are facing the energy crisis caused by the depletion of fossil energy and the greenhouse effect derived from the burning of fossil fuels. In response to this severe situation in the energy world, countries all over the world attach great importance to the development of renewable energy and new energy. After considering all comprehensive factors, nuclear energy has the least impact on the environment, and nuclear power plants can provide continuous power demand without being affected by the climate. In addition, nuclear fuel transportation and storage are convenient, power generation costs are stable, and nuclear power technology and industrialization are mature. It is recognized as the most promising primary energy...

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Problems solved by technology

However, the patent does not apply the concept of radial power of the flattened core and the mathematical method to the core of the square grid arrangement, which is the fuel used in most existing reactors and some ADS reactor designs. The

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