Nuclear reactor primary system chemical decontamination clean-up system component arrangement

In a nuclear reactor including a primary system, a fuel storage building, a primary auxiliary building and a chemical decontamination clean-up system including a chemical injection system for use in cleaning primary system fluids flowing through the nuclear reactor primary system, a layout plan for locating various components of said chemical decontamination cleanup system in said nuclear reactor, comprising the steps of:

• a) locating a plurality of first demineralizer banks formed from three banks of cation demineralizers connected in parallel flow relationship and a single bank of anion demineralizers connected in series flow relationship with said three banks of cation demineralizers in a shielded room within said fuel storage building and flow coupling said plurality of first demineralizer banks to said nuclear reactor primary system for receiving said primary system fluids from said primary system;
• b) locating a second demineralizer bank in a shielded room within said primary auxiliary building and flow coupling said second demineralizer bank to said plurality of first demineralizer banks for receiving said primary system fluids from said plurality of first demineralizer banks;
• and
• c) locating a return means in said primary auxiliary building and flow coupling said return means to said second demineralizer bank for directing said primary system fluids from said second demineralizer bank to said nuclear reactor primary system.