Device and method for analyzing Sr-90 in reactor decommissioned stainless steel material

Abstract

The invention discloses a device and method for analyzing Sr-90 in a reactor decommissioned stainless steel material. The device is divided into a separating unit and a measuring unit; the separatingunit achieves rapid separation of the Sr-90 and a daughter Y-90 of the Sr-90; the measuring unit measures the activity concentration of the separated and purified daughter Y-90 of the Sr-90; and thenthe activity concentration of the Sr-90 is calculated according to the Y-90. According to the method, the treating time is short, and the requirements of rapid separation and analysis are met; meanwhile, the analysis process is simplified and controllable, the using amount of chemical reagents and the contact time of workers are reduced, and the adverse effects of hazards of radioactive reagents and the chemical reagents on occupational health of the workers are avoided; and moreover, according to the principle of selective adsorption separation, the daughter Y-90 of the Sr-90 is efficiently adsorbed and desorbed, and the high recovery efficiency is guaranteed. The method has the advantages of short separation time, simple process, high recovery rate, good system stability, long service life and the like, and the needs of rapid analysis of the Sr-90 in the stainless steel material in a reactor can be met.

Description

technical field [0001] The invention belongs to the technical field of reactor decommissioning, and in particular relates to a device and method for analyzing Sr-90 in reactor decommissioning stainless steel materials. Background technique [0002] Decommissioning of a nuclear facility: Refers to the administrative and technical actions taken to permit the removal of some or all of the regulatory control of a nuclear facility (other than a radioactive waste repository). After the Chernobyl nuclear power plant accident and the Fukushima nuclear power plant accident, people have increasingly realized the importance of nuclear safety. Radioactive pollution has seriously affected human health and the sustainable development of the nuclear industry, and has become one of the environmental problems that need to be resolved urgently. The "Nuclear Safety Plan" jointly issued by the Ministry of Environmental Protection, the National Development and Reform Commission, the Ministry of ...

AI Technical Summary

Problems solved by technology

However, the current foreign methods are often used for laboratory research, and require expensive measuring instruments-liquid scintillation counters, the measurement is relatively cumbersome, and there is no special engineering application Sr-90 rapid analysis method for reactor decommissioning actual stainless steel samples, so Combining advanced radiochemical separation devices to develop a rapid reactor decommissioning analysis method is of great significance for the upcoming analysis of reactor decommissioning samples

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