The load at which each of the governor valves opens with a primary plant T/sub avg/ of 500 deg F was determined. It was found that the No. 2 valve opened at a generator load of 16.6 Mw, the No. 3 valve opened at a generator load of 33.6 Mw, and the No. 4 valve opened at a generator load of 48.4 Mw. (auth)