期刊
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
卷 51, 期 5, 页码 700-711出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00223131.2014.889583
关键词
mass spectrometry; thermal desorption; nuclear fuels; post-irradiation examination; fission gas release
A new system has been developed to determine absolute quantities of gas (mainly noble gases) released during thermal desorption in the range from 10(-12) to 10(-5) mol with a precision of few percent. The system is actually designed for simultaneous measurement of gaseous elements like He, Xe, Kr, thermally released from nuclear fuel samples and also allows the determination of the release kinetics as a function of time. This system, called Quantitative GAs MEasurement System (Q-GAMES), is based on the principle of collecting, purifying and spiking the sample gas in a high-pressure chamber, and continuous sampling of the gas for mass spectrometric analysis without sample depletion during the experiment. It is equipped with its own spike generator and with different gas purification systems. It is shown that this system fulfills the requirement to work with two existing very high-temperature gas desorption facilities for nuclear materials. This paper describes the Q-GAMES principle, the spiking system, its calibration, its operative mode, the different quantification techniques, as well as its technical data, in combination with some examples of typical application.
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