Abstract
China’s rapid economic growth has resulted in significant environmental side-effects. Therefore, China has beeninterested in reducing her dependence on foreign oil and gas by developing technologies needed for hydrogen, in addition to herincreasing energy mix of nuclear and renewable energy form such as solar and wind power. There are three isotopes of hydrogen,i.e. protium (P or H), deuterium (D), and tritium (T). Both deuterium and tritium are important materials in nuclear fuel cycleindustry. Tritium is one of the critical radioactive nuclides. Planning for and implementing contamination control as a part ofnormal operation and maintenance activities is an important function in any hydrogen facility, especially tritium facility. Thedevelopment of hydrogen isotopes analysis is the key issues in this area. Mass spectrometry (MS) with medium (about 600) andhigh resolution (>1400) is commercially available; however, the routine analysis of hydrogen isotopes is done with low-resolutionMS (<200) in China. This paper summarizes the progress of MS measurement technology for hydrogen isotope abundance inChina, focusing on our lab’s research program and technical status. An analyzing method has been introduced for accurate measurementof tritium abundance in the H-D-T system by low resolution MAT-253 MS. The quotient of compression ratio coefficient isdetermined based on building up equipment for laboratory-scale preparation of secondary standard gases and considering thedifference in sensitivity between hydrogen isotopes. The results show that the measured value is believable in the relative errorrange of 0.8% for gas samples of different tritium abundance.
Highlights
China’s rapid economic growth has resulted in significant environmental side effects
Planning for and implementing contamination control as a part of normal operation and maintenance activities is an important function in any hydrogen facility, especially tritium facility
If suitable analyzers and accessory equipments are available, high resolution mass spectrometry should routinely analyze mixtures of the hydrogen isotopes system accurately within 0.5% under ordinary operating conditions, while low resolution Mass spectrometry (MS) should routinely analyze mixtures of the hydrogen isotopes accurately within 2% with accurately mixed standards
Summary
China’s rapid economic growth has resulted in significant environmental side effects. Luo Xue-jian, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, has established the method of analysis of H/D/T gas mixtures with high (>3000) resolution MS (MAT-271) with less than 0.5% accuracy. In 2000’s, Shi Lei,[12−14] Huang Gang,[15] and Zhang Hai-lu[16] have improved on analysis of H/D/T gas mixtures with low resolution MS. Shi Lei modified an analyzing method for accurate measurements of deuterium abundance in the hydrogendeuterium system by low (about 25) resolution MAT-253.
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