Rapid Analysis Method of Strontium-90 in Liquid Effluent of Nuclear Power Plant

Abstract

The invention relates to a rapid analysis method for strontium-90 in the liquid effluent of a nuclear power plant, comprising the following steps: (a) passing the liquid effluent of the nuclear power plant through a cation-exchange chromatography column under acidic conditions, and washing with a nitric acid solution to collect Obtain the first eluate; (b) separate and purify the first eluate through a P204 extraction resin chromatography column, and collect the second eluate by rinsing with nitric acid solution; (c) add scintillation fluid and mix The count rate of yttrium-90 was measured on a liquid scintillation spectrometer; (d) the average value was obtained from repeated measurements, and the specific activity of yttrium-90 was calculated; (e) the specific activity of strontium-90 was calculated. On the one hand, the liquid effluent of the nuclear power plant is passed through the cation exchange chromatography column under acidic conditions to enrich the radioactive substances in the liquid effluent of the nuclear power plant; on the other hand, the first eluent is passed through the P204 extraction resin chromatography column Column separation and purification, so that the 90 Y was separated from the first eluent, which indirectly achieved the separation of strontium-89 and strontium-90.

Description

technical field [0001] The invention belongs to detection and analysis methods of radionuclides, and relates to a rapid analysis method for strontium-90, in particular to a rapid analysis method for strontium-90 in the liquid effluent of a nuclear power plant. Background technique [0002] scene technology [0003] Strontium-90 (ie 90 Sr) is the fission product of U-235 and Pu-239, mainly from nuclear weapon explosions and nuclear reactors. In nuclear power plant reactors, it may enter the primary circuit of the reactor due to fuel cladding defects or damage, and discharge to the environment with liquid radioactive effluents . Among the isotopes of radioactive strontium, strontium-90 is the most harmful, because its physical half-life (28.6 years) and biological half-life (49.3 years) are long and will be permanently deposited in the hematopoietic skeletal system, replacing calcium and causing radiation sickness (such as leukemia); while its daughter yttrium-90 (ie 90 Y...

AI Technical Summary

Problems solved by technology

However, in mainstream nuclear power plants with pressurized water reactors as the reactor type, the content of strontium-89 in the liquid effluent discharge is much higher than that of strontium-90, and the above two technologies cannot separate the isotopes of strontium. It is difficult to use the above two techniques for the rapid monitoring of strontium-90 in the liquid effluent of nuclear power plants

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