Flowrate monitoring in an RBMK process channel on the basis of coolant activity information

A method of determining the coolant flowrate in an RBMK process channel on the basis of activity information is examined. A mathematical model of coolant activation in the RBMK channel and an algorithm for determining the flowrate in the channel with an imprecise flowmeter are described. The results of tests of the computational-measurement system to determine the coolant flowrate in the No. 1 unit of the Kursk nuclear power plant are presented (area of application and error in flowrate determination).     

Computational-experimental determination of the temperature of the components of a shipping container with spent fuel

The results of a determination of the expected temperatures of the structural components of the container with long-term dry storage and shipment of spent nuclear fuel from the AMB reactors at the Beloyarakaya nuclear power plant, under normal and accident conditions, are presented. The requirements for its thermalprotection characteristics are formulated on the basis of normative-technical documentation, and the basic assumptions and initial prerequisites, used to perform the calculations, are presented. The computational-experimental method is used together with the results of tests performed on a prototype model to confirm the possibility of ensuring the required temperatures of the basic components of the container and the fuel assembly. __________ Translated from Atomnaya énergiya, Vol. 100, No. 6, pp. 428–431, June, 2006.     

Pu and Am Distribution in the System Soil-Water-Carboxylic Resin

Dynamics of Pu and Am distribution between components of the system soil-water-carboxylic resin is studied for soils with various absorbing (clay-humus) complexes. The fractional composition of organic components of the aqueous phase of the system and TUE content in the fractions were examined to elucidate the Pu and Am speciation in the solution. The Pu and Am concentrations in the aqueous phase strongly depend on the content and composition of the soil humus matter. Transuranic elements are associated essentially with the humic acid fractions, this trend being more pronounced for Pu. In the system with increased humus content, TUE occur in the solution as complexes with humus substances, and in the system with lower humus content, as hydrolyzed species. The features of sorption processes occurring on the clayhumus complex of the soil were judged from the sorption isotherms of the radionuclides on a resin. Sorption on the resin is controlled by the Pu and Am speciation in the solution.     

A particle energy analyzer of the cylindrical mirror type

Analytical expressions for the electrostatic potential profile and the main parameters of a particle energy analyzer of a simple design with cylindrical electrodes are obtained. The regimes of analyzer operation with maximum energy dispersion in a wide range of the angular width of the field electrode are determined. The proposed energy analyzer can be successfully combined with the high-dispersion mass analyzer of the cylindrical mirror type developed previously and can be used for focusing a charged particle beam with respect to velocity.     

Influence of structure on physicochemical and service properties of Laprols

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 3, pp. 26–28, March, 1991.