High temperature cobalt adsorbents

Purpose: To enable to absorb radioactive corrosion products in reactor water even in high temperature and high pressure water, thereby simplify the device and decrease the heat loss. Constitution: Adsorbents comprising from 50 to 70 w/o of Fe or Ni, from 30 to 50 w/o of Ti and from 0 to 5 w/o Li as the ingredient ratio are used in a reactor water clean up facility for removing radioactive corrosion products, particularly, cobalt ions from primary coolant circuits of a nuclear reactor. The use of the adsorbents under higher temperature and pressure than those for ion exchange resins employed so far is enabled by using such a ingredient ratio, by which the degradation in the adsorbing performance and release of once adsorbed impurities are eliminated. Accordingly, a facility for cleaning up the reactor water after once lowered to ambient temperature and normal pressure and then returning into the primary circuits after increasing to higher temperature and pressure is no more required. (Sekiya, K.)