METHOD AND EQUIPMENT FOR SUPPRESSING GENERATION OF OXYGEN DUE TO RADIOLYSIS OF WATER IN BOILING WATER REACTOR

摘要

PURPOSE:To provide a method and equipment for reducing the concentration of dissolved oxygen in reactor water by suppressing the quantity of oxygen generated by the radiolysis of the water in a boiling water reactor. CONSTITUTION:An organic compound injection device 14 is controlled by an organic compound injection device control system 13 which processes information from a reactor water quality monitoring device 12. An organic compound (e.g. trimethylamine) is supplied from the organic compound injection device 14 to a core 1 through a cooling water line of a control rod driving mechanism 11 by an injection pump 16, reacts with OH radicals generated by the radiolysis of water and makes the OH radical extinct, thus suppressing generation of oxygen being a decomposition product of the OH radicals. According to this constitution, the same effect as the one obtained by usual injection of hydrogen is obtained by a smaller amount of injection of the organic compound than the former. Since the organic compound is used, handling such as transportation and storage is facilitated in comparison with a prior art using the hydrogen in the form of a high-pressure gas. Since it is also easy to know the amount of injection, in controllability is improved and also safety of installations is improved.