Patent ID: 6549603
Filing Date: 2003-04-15
Classification: G21C,G21F,Y02E

Abstract:
A method of chemical decontamination which comprises, in a boiling water reactor nuclear power plant provided with a first structural member having a surface which contacts with a coolant and is made of stainless steel and a second structural member having a surface which contacts with a coolant and is made of carbon steel or an iron-based alloy containing chromium and being inferior in corrosion resistance to the stainless steel, pretreating the second structural member with an oxidation decontaminating solution containing an oxidation decontaminating agent applied to both the first structural member and the second structural member, thereby increasing corrosion resistance of the second structural member, and thereafter decontaminating the first structural member and the second structural member with a reduction decontaminating solution containing a reduction decontaminating agent applied to the first structural member and the second structural member, to remove radionuclides from both the first structural member and the second structural member.