| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a silica removal method capable of efficiently removing silica from a nuclear reactor water.SOLUTION: A silica removal method for removing silica from a nuclear reactor water exchanges an ion exchange resin, provided on a filter demineralizer constituting a nuclear reactor coolant purification system for purifying reactor water, for new one, at the time when a silica adsorption amount peaks, to remove silica from reactor water. In this case, silica adsorbed on the ion exchange resin is removed before re-emitted by substitution with other anions having strong adsorption power, and therefore silica can be efficiently removed from the reactor water. This leads to a slower rise of silica concentration of the reactor water after the exchange and leads to a longer period of time to reach a control value which requires next exchange. Thus, the number of exchanges of ion exchange resins can be reduced more than before.</p> |
