Design and Development of Drive Mechanisms for Adjuster Rods, Control Rods and Shut-Off Rods of TAPS - 3 & 4

摘要

BARC and NPC1L had entered into an MoU, for the design and development of reactivity control mechanisms for adjuster rods, control rods and shut-off rods for TAPS 3 & 4, This development work was taken up at the Division of Remote Handling & Robotics (DRHR), BARC. Reactivity control mechanisms of TAPS 3 & 4 are electromagnetic type with sheave rope arrangement; however, design is significantly different from that used in Dhruva and 220 MWe PHWRs. The control mechanisms for TAPS 3 & 4 are designed with a number of advanced features like modular construction giving ease of maintenance, 90 percent free fail for shut-off rod/ control rods giving high reliability and consistent rod drop performance, on-line test facility for shut-off rods to ensure rod availability on demand while reactor is under operation and partial release and re-arresting of control rods for reactor stepback function.