Method for combining gamma spectrum with active X fluorescence for simultaneously measuring uranium, thorium, radium and potassium

Abstract

The invention discloses a method for combining a gamma spectrum with active X fluorescence for simultaneously measuring uranium, thorium, radium and potassium. The method comprises the following stepsthat: the automatic scale of a gamma-ray detector realizes spectrum drift calibration, stratum gamma-ray detection and analysis, isotope gamma source active excitation of spectrum elements to generate X fluorescence information as well as analysis and the combined analysis of gamma and an X fluorescence spectrum; and comparing stratum multi-element contents obtained by the X fluorescence information with the energy characteristic peak of the gamma ray detector to carry out secondary judgment on the contents of radionuclides including uranium, thorium, radium and potassium in the stratum. Themethod has the advantages that isotope embedding is adopted to automatically carry out the energy scale calibration of the gamma ray detector so as to overcome a spectrum drift problem, the difficultyof the saturation and the counting missing of the gamma ray detector due to the gamma ray accumulative effect of a low energy area can be eliminated, active X fluorescence realizes a purpose that elements from Si to U in the stratum are simultaneously subjected to qualitative and stratum parameter analysis, and the gamma spectrum and the active X fluorescence are combined to improve analysis accuracy to realize a purpose of simultaneously measuring multiple nuclides including uranium, thorium, radium, potassium and the like.

Description

technical field [0001] The invention belongs to the field of nuclear logging and relates to nuclear technology, in particular to a method for simultaneously measuring uranium, thorium, radium, and potassium by combining gamma energy spectrum and active X-ray fluorescence. Background technique [0002] As a major national strategic material, uranium, the main fuel for nuclear power, affects and restricts the development of my country's nuclear power and other energy strategies. my country's nuclear power generation plan has led to a sharp increase in the demand for uranium. In order to solve the nuclear fuel problem, my country has searched for raw materials around the world. However, in order to avoid the risks brought by foreign market shocks, it is necessary to strengthen my country's uranium resource exploration and exploration and development. In order to meet the demand for uranium resources in my country's rapidly developing nuclear energy industry. [0003] At present...

AI Technical Summary

Problems solved by technology

[0003] At present, the total γ logging technology generally adopted in uranium exploration in my country requires a large number of rock ore sampling and chemical analysis to correct the quantitative interpretation results of uranium content in the total γ logging, that is, to correct the uranium-radium balance, radon emanation, Thorium and potassium interference and other factors have disadvantages such as low interpretation efficiency and large errors

Gamma spectrum logging is more advanced than total gamma logging in terms of performance, but it is also subject to many interference factors, such as the cumulative effect of low-energy areas when the formation scatters, detector leakage counts; serious spectral drift; uranium, thorium, radium, Potassium and other radionuclides interfere with each other, seriously affecting the measurement accuracy

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