Measurement and Verification of Trace Components in Neon by Gas Chromatography

In order to complete the tritium production of irradiated tritium breeder in the solid tritium breeder reactor of fusion reactor, in addition to the conventional ionization chamber, a high-precision gas chromatography on-line detection and analysis method of neon carrier gas was established in this work. The tritium production in the system was verified by measuring the helium production in the tritium production circuit. Thus, a new tritium production rate measurement and verification method was provided for the irradiation tritium production performance of tritium producing cladding solid breeder materials in fusion reactor. It’s necessary to establish the method of analyzing trace ⁴He, H₂ and impurity components in Ne, in order to complete the test of real-time online detection of the system, developing three detectors and five chromatographic columns. The results show that the developed chromatographic analysis system can realize the detection and analysis of ⁴He, H₂ and impurity components in high-purity Ne, the detection limits of H2 and 4He can reach 1.0×10-6 and 5.9×10^-6 respectively, the relative standard deviation(sr) of each component content and peak area are less than 5.0%(n=6), and the linear correlation coefficient r² is greater than 0.99, indicating that the detection method has good repeatability. According to the on-line test of multicomponent gas in Ne, the measurement repeatability in single period and multi period is good, which can provide an analytical means for the verification of tritium production rate in the irradiation tritium production assessment system, and then provide technical support for the formal entry into the reactor to obtain irradiation data and tritium balance.