Tritium water electrolysis concentration equipment and method

Abstract

The invention provides a tritium water electrolysis concentration device and method. The equipment includes: an electrolysis cell for electrolyzing tritium water, which includes a water inlet, a hydrogen outlet, and an oxygen outlet; a sample bottle, which includes a sample inlet and a water outlet, and the sample inlet is used to introduce the sample tritium water into the sample bottle , the water outlet is used to export the sample tritium water, and the water outlet is connected to the water inlet of the electrolyzer; the oxygen discharge device is connected to the oxygen outlet of the electrolyzer, and is used to discharge the oxygen produced by electrolysis to the environment; the hydrogen discharge device is connected to The hydrogen gas outlet to the electrolyzer is used to discharge the hydrogen gas produced by electrolysis to the environment, and the hydrogen gas discharge device includes a mass flow meter for measuring the cumulative mass flow rate of hydrogen gas produced by electrolysis. According to the technical scheme of the present invention, the structure design is simple, the operation is convenient, the electrolysis efficiency is high, the volume concentration rate is calculated accurately, and it is safe and pollution-free, realizing the safe, efficient and stable electrolysis concentration of low-level tritium water in the environment.

Description

technical field [0001] The invention relates to the technical field of environmental radioactivity measurement, in particular to a tritium water electrolysis concentration device and method. Background technique [0002] The activity of tritium in natural environment water is generally lower than the minimum detection limit of existing liquid scintillation counters (about 1Bq / L). GB / T 12375-1990 gives the detection limit of tritium in water as 0.5Bq / L. To measure the radioactivity of tritium in water, it is necessary to first enrich the sample with tritium. [0003] Electrolysis technology is an important means to realize the separation of hydrogen and tritium in water, which can be divided into three categories: alkaline electrolysis, solid polymer membrane electrolysis and proton exchange membrane electrolysis. In terms of electrolytic concentration of low-level tritium water, the International Atomic Energy Commission and some units in my country adopt the alkaline elect...

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Problems solved by technology

In terms of electrolytic concentration of low-level tritium water, the International Atomic Energy Commission and some units in my country adopt the alkaline electrolysis method, which has low efficiency, strong corrosion, limited volume concentration rate and potential safety hazards. There is no complete set of equipment for sale on the market. Self-designed, not easy to popularize; Japan first proposed a solid polymer membrane tritium electrolysis device in 1996, and it has been gradually applied in my country. This method electrolyzes pure water with high electrolysis efficiency, no pollution and volume concentration rate restrictions, but The dead volume of concentrated liquid is large and extremely unstable, which makes the measurement accuracy worse

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