Reduction of Volume of BWR Plant Radioactive Wastes by Operating Condensate Demineralizers without Regeneration

Abstract

Since chemical regeneration of condensate demineralizers produces a large quantity of radioactive liquid wastes, reducing the volume of such wastes has become a significant concern.In Japanese Improvement and Standardization BWR's, by installing a prefilter upstream from the condensate demineralizer, and improving construction materials and method of controlling water chemistry, the crud and ion load on the condensate demineralizer has been reduced.Since non-regenerated operation of the condensate demineralizer has been devised and tried on the No.2 Unit of the Fukushima Daini Nuclear Power Station (2F -2) with variable resin measurement during every scheduled outage and each fuel cycle. The result has been a reduction of the number of drums to be disposed of to 1/5 the previous number.