Device and method for adjusting valence states of neptunium and plutonium in hot chamber

Abstract

The invention discloses a device for adjusting valence states of neptunium and plutonium in a hot chamber. The device comprises an inner cylinder, a jacket cylinder, a sample feeding system, a discharging system, a sample online analysis system, a seasoning bubbling system, a liquid level measurement system, a temperature measurement system and a pressure measurement system. The device provided bythe invention is suitable for radioactive and strong corrosive places, can directly measure the light absorption value of a sample in the hot chamber, and utilizes the spectral absorption peaks of different substances to judge the ion valence state and other information in the feed liquid.

Description

technical field [0001] The invention relates to the field of spent fuel reprocessing, in particular to a device and method for adjusting the valence states of neptunium and plutonium in a hot chamber. Background technique [0002] Aqueous nuclear fuel reprocessing is the process of treating irradiated nuclear fuel with chemical separation methods such as precipitation, solvent extraction, ion exchange, etc. in aqueous solution. It is a common method in nuclear fuel reprocessing, generally including the following three steps: The first step is to remove the shell of the fuel element by mechanical or chemical method, and dissolve the element core (metal or oxide) in nitric acid. This step is called head-end treatment; for stainless steel or zirconium alloy cladding fuel elements, then The cutting-leaching method is adopted, that is, the element is cut into small pieces, and then the core is leached with nitric acid without dissolving the shell. The second step is that the sol...

AI Technical Summary

Problems solved by technology

The hot cell is a place with strong radioactivity and strong corrosiveness, and the price adjustment experiment process usually uses a simple container for the above operations, which has certain safety hazards and uncertainties. Therefore, it is necessary to design a suitable for radioactive and strong corrosive places. Price adjustment device, and can monitor the valence state of target substance ions in the reactor in time, so as to have real-time monitoring and control of the price adjustment reaction process

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