W. Wen's research while affiliated with China Academy of Engineering Physics and other places

Publications (17)

Article
A low-temperature desorption method was developed to remove the tissue free water tritium (TFWT) in plants, which dramatically reduces the sample-preparation time from several days to only 2–3 h. Two factors, including spatial distribution and seasonal variation, that influence the tritium distribution and the organic bound tritium (OBT)/TFWT ratio...
Article
Plutonium is one of the key radionuclides in nuclear decommission. In this study, a rapid method was developed to analyze Pu for concrete samples using total digestion, CaF2/LaF3 coprecipitation, extraction chromatography using TEVA and DGA resins, and ICP-MS measurement. The whole analytical process can be achieved within 2 days, with sufficiently...
Article
To rapidly assess the contamination of actinides in emergency water, a method was developed to simultaneously analyze U, Th, Pu and Am. The method consists of two steps: extraction chromatographic separation using UTEVA and DGA resins and isotopic determination of actinides by inductively coupled plasma mass spectrometry (ICPMS). The whole analytic...
Article
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Article
In order to evaluate the influence of tritium on the environment, the method of low temperature resolving-liquid scintillation counting (LSC) has been developed to analyze the tritium activity of environmental plant. The tissue free water tritium (TFWT) in plant around nuclear facilities is resolved in the temperature range of 110~120℃, and the tri...
Article
In order to minimize radioactive wastes, it is necessary to analyse 36Cl in graphite during reactor decommissioning. The dissolution method was set up. The mixed solution of H2SO4, HNO3 and KMnO4 was used to dissolute graphite samples. The chemical recovery rate of the dissolution method was more than 89.38%.
Article
The scheme of decommissioning tritium contaminated metal glovebox was designed, which can reduce tritium gas release during the glovebox dismantling, the volume of tritium waste and the radiation damage. The scheme includes a preliminary tritium decontamination before the glovebox dismantling, a suitable cutting technology for the glovebox and a mu...
Article
According to the status of tritium from the stainless steel pipe which is used to the structure materials in some tritium-operating system, the technological process for tritium decontamination of the pipe is designed. An experimental device is then developed to decontaminate tritium from the decommissioned stainless steel pipe. The decontamination...
Article
To establish a method of measuring the activity of 63Ni in aluminium alloy samples in reactor, the chemical yield, the decontamination, the effect of Ni carrier on measuring efficiency and blank experiments were studied based on the previous confirmed pre-treatment of samples. The chemical yield of this method is beyond 70%. The decontamination fac...
Article
The survey of the source terms was carried out before a tritium laboratory decommission. The radiation protection for the action was reported based on the lab condition, and the radiation dose of the worker and the people who lived around were analyzed. The results show that the investigation has a little influence for the lab environment. During t...
Article
The decommissioning process of a tritium target preparation system and radioprotection were introduced. The doses of the public and workers were also estimated. During decommissioning, the doses of the public and the workers absorbing tritium are both much lower than that of the national standard.
Article
Aluminum cutting machine and angle grinder were applied to cut the non-sealed and the sealed tritium-contaminated metals. To evaluate the tritium releasing rates, the releasing activity in the cutting process and the left activity in the metals were measured. The experimental results show that for the non-sealed and the sealed tritium-contaminated...
Article
In order to find a proper material for temporarily sealing tritium-contaminated stainless steel, the surface morphology and specific surface area of neutral silicone sealant film were characterized in this paper. Base on it, the temporary sealing experiments were carried on modeling samples of tritium-contaminated 316 L stainless steel with neutral...
Article
To analyze 14C content in graphite of reactor retirement waste, a suit of making sample experiment system with high temperature catalysis and oxidation was designed. The treatment ability and working function of this system were confirmed partly in the lab. The results show that the catalysis and oxidation ability is 96% with 1 L/min gas flux and 8...
Article
Tritium can be released from the exterior of tritium-contaminated stainless steel by slight stirring while decontaminating and disassembling. In order to avoid secondary tritium contamination to environment and operators, it is necessary to cover with an effective coating to tritium on the exterior of tritium-contaminated stainless steel and fill a...
Article
The distribution and the forming of the tritium in the surface layer of the stainless steel which would be decommissioned were studied using chemical etching. The samples are the real tritium pollution stainless steel coming from the decommissioning tritium facility. The most of the tritium gathers in the surface of the samples, in the range of 0-4...
Article
The wiping decontamination and stripping coating decontamination were applied to decontaminate the floors and metals in the glove box polluted by tritium. The results show that the polluting level is lower than 20 Bq/cm2 through wiping decontamination. The DFs are higher for decontaminating higher-polluted metals using two stripping coatings while...

Citations

... Irregular or peak tritium emissions make it even more difficult to predict the formation of OBT [220]. This is due to the fact that the transfer of tritium from the atmosphere to plants, followed by its transformation into OBT, is a long process that depends on spatial distribution, seasonal fluctuations, variable weather conditions, plant characteristics, and runoff dynamics [221][222][223]. Thus, it was shown [223] that the concentrations of OBT and TFWT were significantly higher in plants growing on the downwind side of the tritium source than on the windward side; a correlation relationship was confirmed between the tritium activity in cereals and fruits and prevailing wind direction during the growing season, as well as between the tritium activity and distance to the emission source [46,224]. ...
... Hence, there is no particular concern about the separation of Pu from Pb. It is well known that TEVA resin developed by Horwitz was the first choice for Pu separation due to its high extraction capacity for tetravalent Pu [4,18,24,25]. A single TEVA column can provided a decontamination factor (DF) of Pb on the order of 10 3 [18], but it is not sufficient for ultratrace Pu analysis in high Pb content samples. ...
... For example, fusion, acid leach and microwave digestion were taken to transfer Pu from solid samples to the solutions [6][7][8][9][10]. Moreover, evaporation and co-precipitation were applied for the pretreatment of Pu from large volume of water samples [3,11,12]. However, because most of interferents were still existed in Radiation Corporation (China). ...