Solid-state neutron-flux measuring system

FOR CONTROL of a nuclear reactor, direct measurement of the power developed is desirable. The product of the coolant flow rate and the temperature differential of the coolant through the reactor gives a measure of the power developed. But this method of measurement is not fully adequate for control, because the detectors of temperature and flow rate respond too slowly to the rapid changes of power and temperature that can occur in reactors, especially during startup.