THREE-DIMENSIONAL FLUX AND POWER DISTRIBUTION MEASUREMENTS IN A POWER REACTOR
Three-dimensional flux and power distribution measurements in a pressurized-water power reactor present serious problems of accessibility, remote positioning, high temperature, and personnel exposure. These problems are successfully overcome by an activation-wire system which was developed and is used extensively for measurements within the core of such a reactor. Data are obtained during steady-state operation at flux levels in the range of 10/sup 12/ to l0/sup 15/ nv by simultaneous activation of 42 titanium-copper activation wires 0.020 in. in diameter. Pure copper wires are used for measurements in the range of 10/sup 9/ to 10/sup 11/ nv. A remote-drive mechanism positionsmore »