PMT is proud to introduce its new line of replacement stainless steel CRD Hydraulic Control Units (HCU) for BWR plants. PMT has reverse engineered and designed a replacement CRD-HCU for BWR’s. The replacement unit is a like-for-like replacement for …

Control rods are inserted, withdrawn and scrammed using hydraulic control units (HCUs). Provisions for inserting, withdrawing, and scramming of each CRD mechanism is accomplished with the use of an individual HCU for each control rod. Each HCU (Figures 2.3-1 & 2.3-2) consists of: directional control valves.

HCU rod drives air cleaning units • Proven design installed in plants around the world • Solenoid housing can be rotated for installation requirements • Long life stainless-steel bodies and mounting flanges • Supplied with or without integral flow control device • Low power consumption coil • Continuous duty, class F coil insulation

2021年3月9日 · The HCU is a major component of the CRD system that incorporates all the hydraulic, electrical, and pneumatic equipment necessary to move one CRD mechanism during normal or scram operations. This equipment, which includes the accumulators, CRD insert lines, CRD withdraw lines, and scram valves, is supported by the HCU frames.

The Control Rod Drive (CRD) System is comprised of the fine motion control rod drives (FMCRD), the hydraulic control units (HCUs), and the control rod drive (CRD) pumps. This analysis is focused on the FM CRD because the HCU and CRD pump equipment do not include substantial departure from the earlier BWR desi gns.

2022年12月17日 · 原発では、原子炉圧力容器のなかのウランやプルトニウムなどの燃料と中性子と呼ばれる非常に小さい粒子が反応し、ウランやプルトニウムが2つに割れるとともに大きなエネルギが生まれます。 このような反応が次々と起こり燃料自体が非常に大きな熱を持つとともに、燃料の周囲にある水が蒸気となりタービンを回し発電することできるのです。 しかし、あまり熱を持ちすぎてしまうと最悪の場合は燃料自体が溶けることにもつながることから、運転を …

1994年4月1日 · More than 59% of the NPRDS CRD system failure reports were attributed to components that comprise the hydraulic control unit (HCU). The predominant HCU components affected by the effects of service wear and aging are valve seals, discs, seats, stems, packing, and diaphragms.

Includes both undervessel CRD removal/installation tools and instrumentation tooling. Also includes tools for off-site and on-site CRD rebuild.

hcuは、crを炉心内に挿入したり引抜したりするため、crdに駆動水等を送る装置。 また、非常時にCRを高 圧水で緊急挿入（スクラム）させるための窒素ボンベが付いている。

PMT’s HydraThrust actuator was specifically designed to replace the ITT/Barton Hydramotor as a like-for-like drop in replacement. PMT has designed the HydraThrust actuator to be low …