Typical nuclide monitor of fuel element failure

Abstract

The invention belongs to the field of radiation monitoring technology and provides a typical nuclide monitor of fuel element failure. The monitor is realized based on a typical nuclide detection method of fuel element failure and comprises a detection sampling unit and a signal processing unit. The detection sampling unit is composed of a spiral sampling line, a lead shielding body and a detector core body. The signal processing unit comprises a main amplifier, a sampling unit and a host unit. The monitor provided by the invention can carry out quantitative monitoring on typical fission nuclide in a loop coolant by a gamma spectrometry technology, so as to accurately and timely judge whether a fuel element is damaged. The typical nuclide monitor has characteristics of high precision, fast response and good real-time performance, and is simple and easy to use.

Description

technical field [0001] The invention belongs to the technical field of radiation monitoring, and in particular relates to a typical nuclide monitor for fuel element damage, which is realized based on a typical fission nuclide detection method for fuel element damage. Background technique [0002] There are thousands of fuel elements in the reactor core. These fuel elements have been in high temperature, high pressure, high radiation, and high corrosion environment for a long time, and are subjected to the scour of the main heat carrier, internal thermal stress, etc., especially if the fuel elements exist in the manufacturing process. Some degree of breakage may occur when there are minor flaws. Once the nuclear fuel element is damaged, the fission products will enter the main heat carrier, increasing the radioactive level of the main heat carrier. Leakage will cause pipeline and equipment pollution. Leakage of the primary circuit system will lead to increased radiation lev...

AI Technical Summary

Problems solved by technology

Since the high-purity germanium probe needs to work at low temperature (<-196°C), a complex cooling system is required. At the same time, the high-purity germanium detection system is not allowed to have obvious vibration during operation, otherwise it will affect the normal operation of the equipment. For laboratory use, it is impossible to arrange at the site of a nuclear facility with a complex environment

In addition, the energy spectrum processing software compiled by the computer requires the participation of professionals in the process of analyzing the gamma energy spectrum, which is complicated to operate and inconvenient to use.

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