| 摘要 |
<p>PURPOSE: To enable judging in which function reactor containment isolation cooling system operated by constituting with a judgment means based on a specific logic. CONSTITUTION: A low reactor water level L2 signal and a NOT signal of high drywell pressure are combined with an AND circuit, and low reactor water level L1.5 signal and a high drywell pressure signal are combined with an OR circuit. When the low water level L2 attains even without attaining the high pressure, letter information indicating the attainment of RCIC water supply function actuation signal is recorded in a computer and printed in a trip sequence. When low water level L1.5 or high drywell pressure are attained, letter information indicating the attainment of RCIC core cooling function actuation signal is recorded in a computer and printed in a trip sequence. With this logic constitution, when the reactor containment isolation cooling system operated and water level is between L2 and L1.5 and pressure is not high, the water supply function operates. In the other case, the core cooling function is judged to have operated, which is indicated with the trip sequence and which function of them operated is also indicated.</p> |
