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Non-Intrusive Verification of Spent Nuclear Fuel

Channel Systems Inc. has placed an order with Resolve Optics Ltd to supply a new lightweight version of the 80-200mm focal length UV Zoom lens developed for use with their Digital Cerenkov Viewing Device (DCVD). 

Spent nuclear fuel emits a faint ultraviolet Cerenkov light when gamma rays from fuel assemblies interact with electrons in the cooling pond water.  The DCVD equipped with UV Zoom lens provides a highly-effective system that captures the Cerenkov image of spent fuel for analysis and comparison. This unique system provides inspectors with an effective tool for non-intrusive verification of spent nuclear fuel.

The DCVD UV Zoom lens is wavelength-corrected to view a nuclear fuel assembly situated 13 metres away from the lens and through 10 metres of water. To meet the challenges of the application the UV Zoom lens is able to optimally operate from 10 to 55ºC.  Miniature motors allow accurate remote setting of both zoom and focus functions.  A filter slide was incorporated in the design enabling the lens to be switched between UV (270 to 350 nm) and visible (400 to 700 nm) without the need to refocus the lens.  By using a telescopic focus the lens is able to image objects from 3m to infinity.  The lens achieves high image resolution with low distortion throughout the zoom range without refocusing. A lockable C mount ensures the lens cannot come loose during operation.

Channel Systems Inc. (www.channelsystems.ca) is a global leader in nuclear safeguards technology.  The company also specialises in the design and development of unique instruments for a range of applications including scientific imaging, machine vision and measurement and automation.

Resolve Optics Ltd. (www.resolveoptics.com) is a highly knowledgeable, dynamic company focused upon innovative design, and manufacture of production quantities of lenses and optical products on time to strict quality and target price guidelines. For further information on specialist OEM lens design and manufacture please contact Resolve Optics Ltd. on telephone +44-1494-777100 or email sales@resolveoptics.com 


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