Pages 263-264
Lead-bismuth eutectic (LBE) has a corrosiveness for structural materials. Oxygen concentration control in the eutectic plays an important role on the corrosion protection. In this paper, Development of concentration diffusion analysis code (COCOA : COncentration COntrol Analysis code), and the calculation results are described for a LBE-cooled natural-circulation reactor. Calculation was carried out by two control method (ON-OFF control and PID control). It was calculated even when a trouble occurs in the oxygen control system. As a result, it is concluded that both control methods can control oxygen concentration successfully in the natural circulation reactor. In addition, concentration control is possible even when a trouble occurs in the hydrogen supply system.
