Probe protection device and high-temperature fission chamber with same

Abstract

The invention provides a probe protection device which comprises an outer sleeve and an elastic structure arranged in the outer sleeve. The outer sleeve comprises an outer sleeve, a suspension device connecting ring and a sealing bottom, and the suspension device connecting ring and the sealing bottom are packaged at the upper end and the lower end of the outer sleeve. The elastic structure comprises a first ring body, a second ring body and a spring, and a probe is arranged in the outer sleeve. The first ring body is arranged between the probe and the suspension device connecting ring, the second ring body is arranged between the probe and the sealing bottom; the spring is clamped between the second ring body and the sealing bottom, and the spring clamps the second ring body, the probe and the first ring body and has elastic restoring force. The invention further provides a high-temperature fission chamber. The high-temperature fission chamber comprises the probe protection device. According to the probe protection device, due to the elastic structure and the insulation design, elastic buffering and good insulation between the probe and the outer sleeve can be formed, and the damage resistance and the detection capacity of the probe are enhanced.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a probe protection device and a high-temperature fission chamber having the same. Background technique [0002] The neutron detector is one of the essential components of the nuclear reactor. It is used to monitor the neutron fluence rate of the nuclear reactor to adjust the insertion depth of the control rod and the concentration of the moderator, so as to achieve the purpose of controlling the power of the reactor and operating safely. . The neutron detectors are divided into external neutron detectors and in-core neutron detectors, while the in-core neutron detectors are installed inside the core with harsh environment, which are responsible for detecting the burnup level of each burnup component, Monitoring the distribution of neutron fluence rate, calibrating external instruments, detecting hot spot factors, inspecting charging conditions and many other tasks. Theref...

AI Technical Summary

Problems solved by technology

However, during the transportation of the probe and the process of hoisting into the pile, vibration and slight impact collisions inevitably exist to cause damage to the probe; moreover, the probe is placed in a nuclear reactor with high temperature and strong radiation for a long time, resulting in material stress changes and radiation swelling. It will also cause damage to the probe; the inflatable tube under the probe is easily broken and damaged without a protective device, which will affect the sealing of the probe; in addition, the outer sleeve of the probe is in a grounded state, and the probe must be kept absolutely insulated from the outer sleeve, otherwise it will not be possible. detection

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