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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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Latest News
NEA report calls for more accurate data on SNF heat decay
The OECD Nuclear Energy Agency has issued a report calling for more-detailed information on tracking the decay heat of spent nuclear fuel from light water reactors. According to the NEA, the report highlights the increasing importance of accurate decay heat estimations due to evolving fuel characteristics, including higher initial fuel enrichment, increased burn-up rates, and extended reactor cycle lengths.
The report, Summary of the NEA Assessment on Spent Nuclear Fuel Decay Heat for Light Water Reactors, summarizes the findings of a subgroup of the NEA’s Working Party on Nuclear Criticality Safety (WPNCS), which ran from January 2022 to January 2024.
Thursday, November 21, 2024|8:00AM–12:00PM EST
Canaveral 1
Cost: $49
This workshop will cover many of the new features, improvements, and updated tools included in the latest MCNP6.3 code release that are most relevant to the radiation protection and shielding community. While more details of the workshop will be forthcoming, a few of the topics to expect at this workshop include:
MCNP6.3 Unstructured Mesh Geometry
This workshop will cover the unstructured mesh capability in the latest MCNP6.3 code release including some relevant exercises relevant to the radiation protection and shielding community. While more details of the workshop will be forthcoming, a few of the topics to expect at this workshop include:
• An overview of the unstructured mesh capability in MCNP6, highlighting the evolution of this capability within the versions of the MCNP6 code releases
• Discussion on the Abaqus format expected by the MCNP code
• Overview of HDF5-based input/output of the unstructured mesh mesh model and elemental edit file (eeout)
• New geometry and tally visualization options through XDMF-based output
• Ongoing developments in progress for MCNP6.4
All the workshop materials, including slides, exercises, documentation, etc., will be made available to all participants. There will be live exercises done by the instructors. Participants interested in performing the exercises will need to bring their own laptop with the MCNP6.3 software installed (see how to obtain the MCNP6.3 code here ( https://mcnp.lanl.gov/how_to_get_the_mcnp_code.html ), along with a few other openly available tools (e.g., Python, MCNPTools, ParaView). Earlier versions of the MCNP6 code, i.e., MCNP6.2 and earlier, will not be able to perform the exercises provided. Details on the additional software and versions required will be communicated well before the workshop. Attendees are not required to participate in the exercises performed during the workshop nor are they required to have a license to the MCNP6 code. Instructors will be available to discuss participant questions regarding the workshop materials.
