Device for irradiating samples in core or periphery of core of reactor

Abstract

Device to irradiate a sample in the core or at the periphery of the core of a nuclear reactor comprising, a double wall containment (6) delimiting a chamber (7), a receptacle (4) contained in said chamber (7), said receptacle being held at a distance from an inside wall (8) of the containment, said receptacle (4) being designed to contain a coolant, a sample holder (2), a free end of which will be located in the receptacle, in which the inside of the receptacle is in fluid communication with the outside of the receptacle and in which a volume between the inside wall (8) of the containment (6) and the receptacle (4) will be filled with a gas or a mix of gases called the coolant cushion gas.

Description

technical field [0001] The invention relates to a device for the irradiation of material in the core of a nuclear reactor or at the periphery of the core, and in particular to a device for the irradiation of material in a nuclear research reactor. Background technique [0002] Materials or samples must be arranged in the nuclear reactor core or at the periphery of the core in order to be able to test them for their performance under irradiation. [0003] Therefore, there is a need for a device capable of introducing a sample (or samples) to be irradiated into the region of the test reactor where the neutron flux is highest, said sample corresponding to the medium of the fuel assembly. In this zone, the samples and structures under irradiation are exposed to nuclear radiation (gamma rays and neutrons) from the reactor core, which increases their temperature. [0004] High temperature and high pressure are applied to the test device. [0005] It is difficult to select a mat...

AI Technical Summary

Problems solved by technology

This is especially difficult under the irradiation conditions tested

[0006] For example, the life of austenitic steels is significantly shortened at temperatures above 450°C

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