A moderator condenser using in vertical pore path of reactor cold neutron source

Abstract

The present invention relates to a moderator chiller, which can be used in the vertical pore passage of the reactor cold neutron source. It is composed of a cylindrical chiller casing, a double cavity upper roll and a taper lower roll both connected with the chiller casing, a chiller core composed of the upper pipe sheet, several chiller tubulars, supplementary live steam cold-finger and the lower pipe sheet is installed in the chiller casing. The inner chamber of the double cavity upper roll is connected to the moderator stabilivolt kettle outside the reactor, and the outer chamber to the coolant system outside the reactor. The lower roll and the diphasic moderator reciprocation transfer pipe are connected together. This invention can eliminate the liquid flooding generated by the stream and liquid flowing reversely in the cold-finger. Utilizing the heat exchange area and the flow section of the cold-finger sufficiently, it decreases the resistance of diphasic heat siphon circulatory flow, enhances the heat exchange capacity. As a result, it is helpful to arrange the diphasic heat siphon circulatory system in the elongated vertical pore passage.

Description

technical field [0001] The invention relates to a moderator condenser of a nuclear reactor cold neutron source device, in particular to a moderator condenser placed in a vertical channel of a reactor cold neutron source. Background technique [0002] The commonly used cold neutron source moderator two-phase thermosiphon loop consists of neutron moderator package, moderator, condenser, transfer pipe and coolant, especially for cold neutron sources with large nuclear heating power , due to reliability and safety reasons, plate-fin heat exchangers with strong heat transfer capacity and small size should not be used. However, the shell-and-tube condenser that people are used to is relatively large in size, and it is difficult to install it in the vertical channel of the neutron source of the cool source in the reactor whose diameter is strictly limited. Therefore, it is usually placed outside the reactor far away from the neutron moderator package in the reactor. As a result, ...

AI Technical Summary

Problems solved by technology

At present, in the cold neutron sources of large research reactors in the world, there is no precedent for placing the moderator condenser in the reactor.

Images