Abstract
This paper describes two fire cases occurred in electric machine rooms which have supported information processors of water level observatories and control systems. Both fires might be initiated by failure of non-fused breaker(s). This type of fire occurred twice for 4 years in about 700 of the similar systems. If no attention paid to fire risk on non-fuse breakers, we may have the same kind of fire in the control system of nuclear power plants and related process facilities because non-fuse breaker is quite common parts and is used every systems. This paper describes also the concentrations of halogens adhered on the surface of the electrical system before and after a cleaning. The concentration of halogens including products from Halon 1301 and burnt PVC cables may help the corrosion risk assessment of the system.
© 1993 Center for Fire Science and Technology, Research Institute for Science and Technology, Tokyo University of Science
