ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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Nuclear Science and Engineering
March 2025
Nuclear Technology
Fusion Science and Technology
February 2025
Latest News
RP3C Community of Practice’s fifth anniversary
In February, the Community of Practice (CoP) webinar series, hosted by the American Nuclear Society Standards Board’s Risk-informed, Performance-based Principles and Policies Committee (RP3C), celebrated its fifth anniversary. Like so many online events, these CoPs brought people together at a time when interacting with others became challenging in early 2020. Since the kickoff CoP, which highlighted the impact that systems engineering has on the design of NuScale’s small modular reactor, the last Friday of most months has featured a new speaker leading a discussion on the use of risk-informed, performance-based (RIPB) thinking in the nuclear industry. Providing a venue to convene for people within ANS and those who found their way online by another route, CoPs are an opportunity for the community to receive answers to their burning questions about the subject at hand. With 50–100 active online participants most months, the conversation is always lively, and knowledge flows freely.
J. V. Sandberg, J. T. Routti
Nuclear Technology | Volume 63 | Number 1 | October 1983 | Pages 170-175
Technical Paper | Technique | doi.org/10.13182/NT83-A33312
Articles are hosted by Taylor and Francis Online.
The LOUHI82 program is a general purpose least-squares unfolding program. It is based on the minimization of the weighted square sum of the fitting errors of activities and several alternative terms related to the smoothness and assumed shape of the solution, allowing varying degrees of a priori information. The LOUHI82 program is a new version of the LOUHI-type unfolding programs, which have been used for fast neutron and high energy hadron spectrum unfolding. The number of energy points in the new version is 100, which makes it possible to simultaneously cover the intermediate and fast reactor neutron spectrum. In unfolding a reactor spectrum measured with an eight-component resonance and a nine-component threshold reaction detector, physically acceptable solutions were obtained using stronger and weaker a priori information.
