Reactor core of beryllium-water moderated high-flux engineering test reactor

Abstract

The invention belongs to the reactor design technical field, and particularly relates to a reactor core of a beryllium-water moderated high-flux engineering test reactor. The reactor core is composed of a central fuel assembly, side reflective layers, upper reflective layers, lower reflective layers, isotopic target members and control rods; each side reflective layer comprises water gate elements, beryllium assemblies and the isotopic target members; the central fuel assembly comprises fuel assemblies; the central fuel assembly also comprises fuel assemblies each having the center with a target and a beryllium rod, and fuel assemblies each having the center with a beryllium rod; the center of each of the fuel assemblies is the beryllium rod, the upper reflective layer and the lower reflective layer of each of the fuel assemblies are each composed of aluminum, water and beryllium from outside to inside, namely the upper end part and the lower end part are each filled with a target member (C); the center of each of the fuel assemblies is composed of the beryllium rod and the external target member, the upper reflective layer and the lower reflective layer of each of the fuel assemblies are each composed of aluminum, water, target and beryllium from outside to inside, namely the upper end part and the lower end part are each filled with a target member (D). The reactor core has the isotope yield increased by 49% compared with a CETR adopted reactor core.

Description

technical field [0001] The invention belongs to the technical field of reactor design, in particular to a beryllium water moderated high flux engineering test reactor core. Background technique [0002] The initial design of China Engineering Test Reactor (CETR) mainly refers to the French JHR reactor. [0003] There are only 37 cells in the pressure shell of the French JHR reactor, referred to as the small pressure shell scheme: 37 cells are inserted into 34 fuel assemblies, and 3 cells can be placed in material channels, and other material targets can be placed in the center of fuel assemblies The core layout is not flexible enough; the reactor is mainly responsible for material testing, and there is no central heat sink, so the thermal neutron fluence rate is low, and isotope production is not considered; 27 sets of control rods are arranged in the center hole of the fuel assembly, and the replacement is inflexible . [0004] The CETR design also adopted the small press...

AI Technical Summary

Problems solved by technology

However, the upper and lower ends of the core cannot be surrounded by beryllium, resulting in neutron leakage

Images