You are here: Home / NDT and Specialist NDT / SAFERAD
SAFERAD
Small Controlled Area Radiographic System
Brief Description
Standard radiography generally requires evacuation of a large area, typically 30 or more metres from the source in all directions. This, controlled area, must be kept free of personnel for the full duration of the work.
The Saferad™ radiographic system allows barriers to be set at 2 metres or less. In this way it virtually eliminates the usual disruption to construction, maintenance and process operations, resulting in significant savings. The critical reduction in stray radiation is achieved by directing the radiation beam to target only the area under examination and eliminating surplus radiation with carefully engineered collimation.
In addition, the primary beam and radiation scatter are controlled using a highly attenuative material called GammaBlok™. These Saferad features deliver the potential for continuous radiography and the shortening ofconstruction and maintenance programs.
Safety
The operating system includes a source position indicator and automatic source securing mechanism. The safety features of this technique are unequalled and have been demonstrated to the UK Health and Safety Executive.
Capabilities
- Accurately controlled radiation beam for all radiographic techniques, directional, panoramic and projection. With a weight of 9 to 15 kg the handy sized container complies with the latest requirements of BS5650 and ISO3999. It can be used with an Se-75 source of up to 80 curies.
- Reduction in controlled area to 1 or 2 metres, less ifadditional GammaBlok™ is used.
- Reduction in time to establish barriers.
- Ease in monitoring controlled area.
- No need to evacuate large areas of the site.
- Nucleonic instruments and controls can be operated in close proximity to Saferad.
- Reduced likelihood of exposure to radiographers and others.
- New Se75 (Selenium) isotope emits "softer" radiation and produces superior quality radiographs when compared with Iridium 192. The 120 half life of Se75 reduces source change out frequency. Demonstrated steel penetration on over 70mm wall thickness duplex stainless steel.
Limitations
- Increased set-up time.
- Increased exposure time when using Selenium.
- Clearance of approximately 250mm required around the object.
- May not be practical where physical access is restricted.
Preparation
- As required for conventional radiography.
Services Required
