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Nuclear-magnetic flowmeter-relaxometer for control to expenditure and condition transparent liquids of coolant in first circuit of nuclear reactor a moving object
https://doi.org/10.32446/0368-1025it.2022-4-49-58
Abstract
The necessity of increasing the accuracy of measuring the flow rate of the coolant in the first loop of a nuclear reactor for mobile objects has been substantiated. The necessity of monitoring the state of the coolant in the current flow in the pipeline is additionally substantiated. At the moment, in nuclear power plants of mobile objects, the control of the state of the coolant in real time is not implemented. Problems arising when controlling the flow rate of the coolant by various models of flow meters in the primary circuit of a nuclear reactor are considered. It was found that the use of nuclear magnetic flow meters allows them to be solved. A new design of a tagged-type nuclear magnetic flowmeter-relaxometer has been developed using modulation techniques and modulation of the magnetic field in the area of the nutation coil to register the nuclear magnetic resonance signal. Methods for measuring the times of longitudinal and transverse relaxation of the current coolant are proposed. The paper presents the results of studying the parameters (flow rate and relaxation times) of the model solution flowing in the pipeline, which contains the chemical elements that make up the coolant for nuclear reactors of mobile objects. It was found that the measurement error for these parameters does not exceed 1 %. The prospects of using the developed design of a nuclear-magnetic flowmeter-relaxometer in the first circuit of a nuclear reactor of a mobile object are shown.
Keywords
nuclear reactor,
coolant,
moving object,
flow,
heat exchange,
state control,
flow rate,
longitudinal and transverse relaxation times,
measurement error
Supporting agencies: : The study was supported by the Russian Foundation for Basic Research within the framework of research project no. 20-32-90012.
About the Authors
V. V. Davydov
Peter the Great Saint Petersburg Polytechnic University; All Russian Research Institute of Phytopathology
Russian Federation
Russian Federation
Vadim V. Davydov
St. Petersburg;
Bolshye Vyazyomy, Moscow region
N. S. Myazin
Peter the Great Saint Petersburg Polytechnic University;
The Bonch-Bruevich St. Petersburg State University of Telecommunication
Russian Federation
Russian Federation
Nikita S. Myazin
St. Petersburg
R. V. Davydov
Peter the Great Saint Petersburg Polytechnic University
Russian Federation
Russian Federation
Roman V. Davydov
St. Petersburg
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Review
For citations:
Davydov V.V., Myazin N.S., Davydov R.V. Nuclear-magnetic flowmeter-relaxometer for control to expenditure and condition transparent liquids of coolant in first circuit of nuclear reactor a moving object. Izmeritel`naya Tekhnika. 2022;(4):49-58. (In Russ.) https://doi.org/10.32446/0368-1025it.2022-4-49-58
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