ATOMIC POWER PLANT AND WATER QUALITY CONTROL METHOD, FUEL ROD, AND FUEL ASSEMBLY FOR THE ATOMIC POWER PLANT.

摘要

PURPOSE:To provide an atomic power plant and a water quality control method, a fuel rod, and a fuel assembly for the atomic power plant and capable of sufficiently suppressing the redissolution of the activated nuclid into a reactor water. CONSTITUTION:A water contact surface on the inside of a channel box 12 is formed of a high potential material layer 13 (for example, magnetite is formed in a film on the water contact surface on the inside of the channel box 12 by plating) higher in potential than a mixed clad 15 adhered to the surface of a fuel clad pipe 11a. A current is carried from the high potential material layer 13 having a high potential to the mixed clad 50 through the surface of a fuel clad pipe 11a, and since the mixed clad 50 is lower in potential than the high potential material layer 13 to form in an oxidizing environment for emitting electrons, the redissolution of ferrite contained in the mixed clad can be suppressed.