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Division Spotlight
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
Standards Program
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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Commercial nuclear innovation "new space" age
In early 2006, a start-up company launched a small rocket from a tiny island in the Pacific. It exploded, showering the island with debris. A year later, a second launch attempt sent a rocket to space but failed to make orbit, burning up in the atmosphere. Another year brought a third attempt—and a third failure. The following month, in September 2008, the company used the last of its funds to launch a fourth rocket. It reached orbit, making history as the first privately funded liquid-fueled rocket to do so.
Workshop
Sunday, September 25, 2022|1:00–5:00PM PDT|Grand Pacific AB
ADVANTG is a software package that generates variance reduction parameters (space- and energy-dependent weight windows and biased source probabilities) that can substantially improve the convergence rate of fixed-source neutron and photon radiation transport simulations using MCNP. ADVANTG implements the Consistent Adjoint Driven Importance Sampling (CADIS) method to accelerate individual tallies and the Forward-Weighted CADIS (FW-CADIS) method to obtain nearly uniform statistical precision across multiple tallies and large mesh tallies. Additionally, ADVANTG 3.2.0 has the capability to produce variance reduction parameters based on the Multi Step CADIS (MS-CADIS) methodology for optimal calculations of delayed gamma radiation fields such as the shutdown dose rate (SDDR) in fusion facilities.
The workshop will discuss the theoretical background of the methods implemented in ADVANTG before moving on to a demonstration of the use of CADIS and FW-CADIS methods on test cases. The workshop will also include a tutorial on how to visualize the discretized geometry, source and discrete ordinates solutions using the open-source VisIt software (https://wci.llnl.gov/codes/visit/). Common issues when using variance reduction will be discussed alongside some best practices and suggestions for ADVANTG workflows.
ADVANTG has been used in a variety of radiation transport applications at ORNL as well as other organizations. Some recent advanced applications will be presented and discussed, including the use of ADVANTG for pressure vessel fluence predictions, neutron fluence and radiation heating in LWR concrete bioshields, and in the workflow for determining SDDR in the JET and ITER fusion facilities.
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