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Nuclear Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
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ANS Student Conference 2025
April 3–5, 2025
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
H. Huang, R. B. Stephens, S. A. Eddinger
Fusion Science and Technology | Volume 59 | Number 1 | January 2011 | Pages 39-45
Technical Paper | Nineteenth Target Fabrication Meeting | doi.org/10.13182/FST59-39
Articles are hosted by Taylor and Francis Online.
High image resolution ([approximately]1.3 m/pixel) and precision positioning capability make the Xradia X-ray microscopy an attractive platform on which to study X-ray opacity variations. It can complement precision radiography (PR) as an instrument with much higher spatial resolution. PR measures X-ray transmission intensity variations down to 0.01% at 100-m resolution. Since the requirement to differentiate minute lateral variations in X-ray transmission intensity scales inversely with the spatial resolution, an X-ray imaging microscope such as the Xradia MicroXCT can be useful if it measures the transmission intensity variations to <1%. In normal practice, a number of imaging artifacts limit the intensity measurement to only [approximately]2% precision. Such artifacts include the thermal drift and the illumination uniformity of the X-ray source, as well as thickness variations in the scintillator plate and the beryllium X-ray tube window. The conventional flat-fielding technique is not effective against the dynamic interaction between the beryllium window texture and the moving shadow cast by a moving X-ray spot. We have modified the image processing routine so that the lateral variations in the transmitted intensity can be measured to [approximately]0.3% precision on low-Z samples. This technique can be used to record microstructure variations in beryllium samples. Currently, the beryllium microstructures are characterized by ultrasmall angle X-ray scattering on a synchrotron source, which is not commonly accessible, is expensive, and has a long turnaround time. This Xradia-based method has the potential to make it a routine measurement.
