This document provides design and operational criteria for the performance of periodic testing of nuclear power generating station class 1e power and protection systems. The scope of testing covered consists of functional tests@ checks@ calibration verification@ and time response measurements. Criteria are also provided for determining system operational availability@ status@ and necessary documentation; and for establishing test intervals@ shutdown test procedure@ and test procedures during operation. Routine preventative maintenance is not covered by this document. The criteria herein define in greater detail the periodic testing requirements of IEEE Std 279-1971 and IEEE Std 308-1974