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Chen L.-Y.,Northwest Institute of Nuclear Technology | Wu S.,Northwest Institute of Nuclear Technology | Zhang C.-Y.,Northwest Institute of Nuclear Technology | Chen Z.-Y.,Beijing National Data Center and Radionuclide Laboratory
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2014

The radioactive xenon is produced in nuclear facilities which requires special treatment before allowed to release into the atmosphere. In the cleaning process of gaseous waste from nuclear power plant, the adsorption of Xe is great important. Five porous materials were selected, including granular active carbons, molecular sieve and active carbon fiber, and the comparison of their performances was carried out in terms of specific surface area, pore volume, as well as static adsorption capacity in order to determine the most qualified material. The influences of the inlet gas pressure and the length-diameter ratio of the adsorption column on adsorption of Xe in active carbon were studied. The adsorptive capacity of the column is the best when the length-diameter ratio is 17∶1. Source


Dong K.,China Institute of Atomic Energy | Jiang S.,China Institute of Atomic Energy | He M.,China Institute of Atomic Energy | Lin M.,China Institute of Atomic Energy | And 7 more authors.
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2015

Abstract The determination of long-lived nuclide 129I in terrestrial formations has many important applications. The AMS measurement method of 129I has been set up for many years at China Institute of Atomic Energy (CIAE). For further exploring the potential applications of 129I, samples of Deep Sea Ferromanganese Crusts (DSFC) and aerosol were analyzed by Accelerator Mass Spectrometry (AMS). The results show that 129I is not only a good tool for dating, but also an ideal nuclide for nuclear safety monitoring. The newest experimental progress and the main results are detailed in this presentation. © 2015 Published by Elsevier B.V. Source


Wang S.-L.,Tsinghua University | Wang S.-L.,Beijing National Data Center and Radionuclide Laboratory | Bai T.,Northwest Institute of Nuclear Technology | Li Q.,Beijing National Data Center and Radionuclide Laboratory | And 6 more authors.
Applied Radiation and Isotopes | Year: 2012

The half-lives of 88Kr and 138Xe have been determined with two high purity germanium (HPGe) detectors by the position relay method. Data have been recorded at regular time intervals during measurements covering more than nine times the respective half-lives. This article describes in detail the principle and process of the position relay method with two HPGe detectors. The determined half-lives of 88Kr and 138Xe are 2.804±0.015h and 14.18±0.10min, respectively. © 2012 Elsevier Ltd. Source


Wang S.-L.,Tsinghua University | Wang S.-L.,Beijing National Data Center and Radionuclide Laboratory | Li Q.,Beijing National Data Center and Radionuclide Laboratory | Fan Y.-Q.,Beijing National Data Center and Radionuclide Laboratory | And 6 more authors.
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | Year: 2010

Calibrating the detection efficiency accurately is the key work to the gas activity measurement by HPGe detector gamma spectrometer method. The gas samples operation is difficult because of their state and characters, especially when the half-lives of gases are short. It is not convenient to calibrate the detection efficiency by real gas calibration source. The paper introduces a new calibration source named simulation gas calibration source, it can replace gas standard source to calibrate detection efficiency of HPGe detector and to monitor the stability of the detection efficiency daily. The matrix density of the simulation gas calibration source is only 0.043 g/cm3 and the self-absorption of this source is less than 0.5%. The efficiency calibrated by this source is in coincidence with reference value well. Source


Fan Y.-Q.,Beijing National Data Center and Radionuclide Laboratory | Wang J.,Beijing National Data Center and Radionuclide Laboratory | Wang S.-L.,Beijing National Data Center and Radionuclide Laboratory | Zhang X.-J.,Beijing National Data Center and Radionuclide Laboratory | Li Q.,Beijing National Data Center and Radionuclide Laboratory
Applied Radiation and Isotopes | Year: 2012

The compton-suppression Spectrometer can suppress the Compton baseline and make weak full energy peaks prominent in low-level activity gamma spectra, so it is used to measure environmental radioactive samples. In order to quantify the activities of the radionuclides in the sample coincidence-summing corrections should be applied. In this article the expressions of coincidence-summing correction of Compton-Suppression Spectrometer were deduced and the validity of the expressions was verified. © 2012 Elsevier Ltd. Source

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