To provide a moisture containing amount measuring unit capable of highly precisely measuring an amount of moisture containing in an inner lining refractory stuck on the surface of the iron plate of an iron melting vessel.
With regard to a moisture containing amount measuring unit 1, a thermal neutron tube 3 is disposed in a groove-like recess 2a at the side of being brought into contact with the surface of an iron plate 11 of an iron melting vessel of a block-like iron member 2, and a thermal neutron column 4 composed of a pair of graphite is disposed in a recess 22a and at a position of sandwiching the thermal neutron tube 3, and a neutron generation source 5 is fitted in the minute hole of the opening side of the recess 2a separated from the recess 2a. As a result, those which are decelerated and radiated from the neutron generation source 5, decelerated and scattered by moisture of an inner lining refractory 13 and returned as the thermal neutron, middle and fast neutrons are properly made the thermal neutrons by the thermal neutron column 4 to be counted by the thermal neutron tube 3, even such returned middle and fast neutrons are included without being converted to the thermal neutron.
DEJIMA KATSURO
ORI TOSHIYA
