Method and system for measuring three-dimensional multi-group energy spectrum of nuclear reactor
A nuclear reactor, three-dimensional technology, applied in the measurement method and system field of nuclear reactor three-dimensional multi-group energy spectrum, can solve the problems of lack of effective means and errors in measurement
Active Publication Date: 2020-07-21
LINGDONG NUCLEAR POWER +3
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Problems solved by technology
However, for reactors with height energy spectrum changes, it may cause large errors, so the existing technology lacks effective means for reactor measurement of height energy spectrum changes
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[0070] The core content of this patent is to obtain three-dimensional energy spectrum data through detection and theoretical calculation, and perform mathematical derivation to the entire nuclear reactor, and calculate the three-dimensional energy spectrum at any position. The method and system are specifically implemented below in conjunction with the drawings and examples. for further clarification.
[0071] Embodiments of a measurement method and system for a three-dimensional multi-group energy spectrum of a nuclear reactor provided by the present invention will be described in detail below.
[0072] Such as figure 1 As shown, the embodiment of the present invention provides a correct arrangement of nuclear reactor detectors, assuming that M types of detectors are arranged in the reactor, and each detector is of a different type. Taking four (M=4) types of detectors arranged in the core as an example, X stands for X-type detector arrangement, Y stands for Y-type detector ...
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The invention provides a measurement method and system for a three-dimensional multi-group energy spectrum of a nuclear reactor, wherein the method includes the steps: randomly arranging at least oneneutron detector in the nuclear reactor; theoretically calculating the three-dimensional energy spectrum distribution of the nuclear reactor, the readings of various types of neutron detectors and theassumed response distribution of various types of neutron detectors; calculating the ratio of real measurement reading of each type of neutron detector to the theoretical reading of each type of neutron detector; diffusing and extrapolating the ratio of the real measurement reading of each type of neutron detector to the theoretical reading of each type of neutron detector to optional position ofthe nuclear reactor; calculating reconstructed response of each type of neutron detector under assumed detector length; and calculating the three-dimensional energy spectrum of optional position according to the selected neutron detectors and energy groups. The ratio of the readings of the neutron detectors to the real measurement readings is stable theoretically, the three-dimensional energy spectrum distribution is solved with combination of theoretical calculation with the ratios, and the problem that effective means is lack for reactor measurement of energy spectrum height change in the prior art is solved.
Description
technical field [0001] The invention relates to the field of nuclear technology, in particular to a measurement method and system for a three-dimensional multi-group energy spectrum of a nuclear reactor. Background technique [0002] A nuclear reactor refers to a device that uses nuclear fission reactions to generate a large amount of heat, uses various working fluids to conduct the heat, and realizes effective radioactive containment and effective control of reactor reactivity. Therefore, the real-time and effective monitoring of nuclear reactors is the key to realize the radioactive containment of the reactor and the effective cooling of the reactor. Because the distribution of neutrons in different energy ranges in the three-dimensional space of the core will lead to differences in the three-dimensional power distribution in the core, which will affect the cooling effect of different areas in the core, which may lead to excessive heat generation and insufficient cooling i...
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IPC IPC(8): G21C17/108
CPCG21C17/108Y02E30/30
Inventor 李文淮丁鹏王磊段承杰仇若翔崔大伟邹尧磊刘宇浩
Owner LINGDONG NUCLEAR POWER