Authors & Affiliations
Kozlov F.A.1, Konovalov M.A. 2
1A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
2National Research Nuclear University MEPhI, Moscow, Russia
Kozlov F.A. – Advisor of Director of Safety Department, Dr. Sci. (Tech.), A.I. Leypunsky Institute for Physics and Power Engineering.
The article represents a estimation method of insoluble getter’s weight gain process during the purification of sodium coolant through the hot traps. The difference between theoretical calculation and experimental data on zirconium weight gain appears to be satisfactory. The estimated value of titanium weight gain constant below 600°C is less than zirconium weight gain, if the temperature is higher then the constants values are almost equal. The article shows the difference of weight rate gains for various zirconium forms. Form factor can play a significant role for invariable characteristic dimension when the weight gain in the hot trap is limited to 2·10-2kg/kg. Therefore the efficiency is up to three times higher. The period of reaching the maximum weight gain for a spheres-shaped getter during the last hour of work is almost equal if the characteristic dimensions ratio of the spheres to the cylinders to the plates is 3:2:1 respectively and the efficiency at the last hours is also the same. It’s better to use a sphere-shaped getter if high efficiency is of utmost importance and operation time isn’t long for example at ? experimental stands. It is advisable to use foil-shaped getter at industrial plants and at space power reactor facilities with sodium coolant where the main parameter is the operation time and the capacity for impurities (maximum weight gain). The efficiency of the hot trap doesn’t fall down after being idle because of redistribution of oxygen impurity into getter’s material. Also the higher was the temperature of idle hot trap the higher is the efficiency at the moment of the restart of purification process.
fast reactor, sodium coolant, method, getter’s weight, temperature, impurity, purification, getter, hot trap, zirconium, titanium, efficiency
Article Text (PDF, in Russian)
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Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2016, issue 5, 5:13