Products & Services: Other Services
Cameco Fuel Manufacturing (CFM) fabricates a wide variety of highly specialized mechanisms used in pressurized light and heavy water reactor components for utility customers around the globe.
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Complete Non-Destructive Testing Services
CFM employs a variety of non-destructive testing processes to ensure the quality and integrity of our critical pressure vessel components
We perform ultrasonic testing, liquid penetrant testing and radiography on our specialized equipment and can plan, design and perform eddy current testing. We also custom design, build and commission non-destructive testing equipment for clients’ on-site use.
Custom Fabrication - Isotope Transportation Packaging
CFM custom fabricates Co60 isotope transportation packages.
After an extended stay in-reactor, cobalt 60 (Co60) is artificially produced by neutron activation of Co59. Once it is rendered highly active, Co60 is difficult to transport due to the high level of gamma radiation emitted. For this reason, a highly shielded transportation package is required.
We manufacture two types of customized cobalt isotope transport packages licensed by both the Canadian Nuclear Safety Commission (CNSC) and the US Nuclear Regulatory Commission (NRC).
Co60 is used mainly for sterilization of medical equipment and as a radiation source for medical radiotherapy, industrial radiography, pest insect sterilization as well as food and blood irradiation.
Custom Fabrications - Reactivity Drive Mechanisms
Drive mechanisms are typically used to drop devices into the reactor and retract them from the core. These mechanisms include shut-off rods, or other types of reactivity control devices such as control rods, adjuster absorber rods and cobalt adjuster rods. These devices consist of a radiation prepared servo drive motor, an electromagnetic clutch, a sheave winding system and a damper mechanism.
During regular operation of the reactor, the electro-magnetic clutch is engaged, holding the reactivity mechanisms in position either fully or partially retracted. When activated or during a power loss to the nuclear generating station, the electromagnetic clutch disengages and the reactivity rods are fired into the reactor for a complete shut-down. The damper mechanism allows the rods to decelerate as they reach their final resting position in the reactor.
Associated with drive mechanisms, we also produce sensors used in defining the position of the various control or shut-off rods when fully retracted. These are known as rod-ready indicators.
Oxide Coating Services
Zircaloy is relatively mid-range in terms of hardness and other mechanical properties. To increase abrasion resistance and strength, CFM can provide surface oxide treatment to various grades of nuclear zircaloy.
The zirconium oxide depth and thickness can vary to meet precise design specifications. The zirconium oxide surface provides an extremely hard and abrasion resistant surface.
Pickling & Passivation
A solution of hydrofluoric acid is used to pickle zircaloy components. Site specific or overall dimensional control can be achieved by either preferential pickling or overall pickling. Depending upon the amount of metal to be removed, the type of acid bath may be altered. Pickling can also be used for inside surface conditioning of longer length tubing.
Passivation is used to make the metal more "inert." Different acid baths are used to achieve passivation of zircaloy components.
Several different polishing techniques are available, depending upon the technical specifications required by the customer. Typically, the outside diameter will be polished to provide either a specified surface condition or a dimensional requirement. Lengths of tube and bar between one to six metres can be polished on the outside diameter. Shorter lengths can be inside diameter polished.
Seam Welded Precision Tubing
CFM can perform axial and radial welds in tubes up to seven metres long, with outside diameters ranging from 88 mm to 180 mm. Tubes are usually robotically welded, followed by an X-ray or ultrasonic inspection of the weld and tube itself. Liquid penetrant testing can also be performed.