METHOD OF SAMPLING AND DELIVERING SAMPLES OF RADIOACTIVE SOLUTIONS AND DEVICE FOR ITS IMPLEMENTATION

摘要

FIELD: radiochemistry; nuclear physics and equipment.;SUBSTANCE: invention relates to radiochemistry, specifically to handling radioactive solutions when processing irradiated nuclear fuel. Method of sampling and delivering samples of radioactive solutions, involving sampling with the help of a sampling device, introducing a solution sample into the capillary transport tube, creating a positive pressure drop of the gas phase in the transport tube before and after the sample in the direction of movement thereof, controlling the value of the positive pressure drop to limit the rate of movement of the sample along the transport tube and receiving the sample into the sampling container, wherein the sampling device is a sampling tube, the free end of the transfer tube is connected to the inner cavity of the sampling tube above the free end of the latter, vertically immersing the free end of the sampling tube into the radioactive solution, performing pre-filling with radioactive solution of sampling tube above point of its connection with free end of transport tube, creating appropriate rarefaction of gas phase in sampling tube relative to pressure in solution near free end of sampling tube, then, a portion of a sample of the radioactive solution is introduced into the transport tube, increasing the vacuum of the gas phase in the transport tube at a predetermined rate to a given value, thereafter, reducing the vacuum of the gas phase in the sampling tube so that the level of radioactive solution in the sampling tube is set below the free end of the transport tube, and transferring the sample along the transport tube with further sampling into the sampling container. Disclosed also is a device for sampling and delivering samples of radioactive solutions.;EFFECT: high reliability of sampling and delivery of samples of medium- and low-activity radioactive solutions.;13 cl, 2 dwg