The seismic tests were carried out to confirm the operability limit acceleration for the standard motor-operated butterfly valve actuator at three-direction each excitation. Based on the results, the design of seismic brackets that can operate valves even in 3 directions 20×9.8 m/s2 or more were performed on three representative models. In the model subjected to the seismic test, we mounted a designed seismic bracket and confirmed the operability of butterfly valve actuator by carrying out each vibrati...
英字タイトル:
Seismic test results of motor-operated butterfly valve actuators for nuclear power plants

Abstract In operation of nuclear power plants (NPPs), it is required not only to preserve and improve the reliability and safety, but also to introduce more efficient and lower cost maintenance strategy simultaneously, due to the power trading deregulation in recent years. For this purpose, Condition Based maintenance (CBM), which has been extensively applied i n the nuclear power plant of U.S., is introduced as a maintenance method for rotating machines in Japanese nuclear power plant. TOSHIBA develops t...
英字タイトル:
Development and application of Monitoring and Diagnosis Techniques for Condition Based Maintenance in Nuclear Power Plant