We have supported the nuclear industry with the design and manufacture of bespoke pump units for three decades.

We offer the very latest ergonomic lances for manual nuclear decontamination projects. However, our drive to design and supply more semi-automatic systems has proved popular as this removes the operator from the work area.

The high pressure water is supplied by one of our diesel or electric-driven units from our MultiJet range. Developed over the last thirty years, the MultiJet is designed and built to offer outstanding safety and reliability. Featuring a pump from the Hammelmann range of reciprocating plunger pumps, our MultiJet units benefit from long service intervals.

Whether you need to remove contamination from process parts, large waste containers, or the walls of a cooling pond, we have the solution. Where waste wash water will be sent for processing, minimization of water usage is both environmentally and economically important. Our pumps can be controlled by on-board variable speed drives to allow precise water delivery. Pressure and flow data on discharge lines is routed to the control system. The pump unit will ensure optimum water delivery and accurate measurement to achieve minimal water usage.

Abrasive and waterjet cutting
Where there is a requirement to cut through steel without using heat or creating sparks, high pressure water is the ideal method. With the operator removed from the work area and the system controlled remotely, the safety of personnel is a large factor in the popularity of this method.

Auxiliary cooling and reactor flood
A catastrophic, beyond design basis event can result in the loss of site power or the disablement of the nuclear reactor cooling pumps. We design and manufacture mobile, self-contained reactor cooling pump units and water flood pump units. These are diesel engine driven units, capable of operating anywhere on land. Hooked up to a water supply, they provide a high flow of cooling water to the reactor. They can be moved by fork truck, crane or off-road vehicle. The units use on-board controls and can be fitted with integral hose reels and racks of lay-flat hose.

Check out this case study detailing the design and build of lightweight, high pressure auxiliary cooling water pump packages for Beyond Design Basis (BDB) events.

Tube, pipe and tank cleaning
Our range of manual and semi-automated cleaning systems is used widely in various industrial settings. From multi-lance tube bundle cleaning to non-man-entry tank cleaning systems, we offer the very latest in cleaning technology.

To discuss your requirements in more detail, please call +44 1905 751790 or email sales@calder.co.uk

This case study details the design criteria for high pressure auxiliary cooling water pump packages for EDF Energy.

  • Skid. The most compact, lightweight option.
  • Trailer. Site trailer and road-going trailer options.
  • Crash frame. Lightweight, but offering significant protection during site movements. Options for noise and environmental enclosures, and sound attenuation.
  • Container. Offering the most protection from both onsite movements and the elements. Ideal for pump units that will be stored or operated outdoors.
  • Auxiliary reactor cooling.
  • Reactor containment vessel flooding.
  • Process part decontamination.
  • Waste container decontamination.
  • Cooling pond structure decontamination.
  • Conveyor cleaning.