Nuclear Data

OECD/NEA

NEA Databank

The primary role of the NEA Databank is to provide scientists in member countries with reliable nuclear data and computer programs for use in different nuclear applications. The services also include thermochemical data for radioactive waste management applications.

International Criticality Safety Benchmark Evaluation Project (ICSBEP)

The primary purpose of the International Criticality Safety Benchmark Evaluation Project (ICSBEP) Working Group is to compile critical and subcritical benchmark experiment data into a standardised format that allows criticality safety analysts to easily use the data to validate calculation tools and cross-section libraries.

NEA ICSBEP Home Page

ICSBEP Handbook

The work of the ICSBEP is documented as an International Handbook of Evaluated Criticality Safety Benchmark Experiments (ICSBEP Handbook). Cases within the ICSBEP Handbook have increased from 406 in 1995 to 4839 in 2014.

Database for the International Criticality Safety Benchmark Evaluation Project (DICE)

DICE accomplishes two main objectives:

1. It provides a summary description of each experimental configuration where the main characteristics of the experiments are displayed in a uniform format.

2. It allows users to search the handbook for experimental configurations that satisfy their unique input criteria.

DICE provides the user with access to several categories of data, including:

• Detailed 1-group neutron balance data for each configuration with individual isotope contributions in different regions of the geometry.

• Flux and other reaction rates spectra in a 299-group energy scheme. Plotting capabilities were implemented into DICE allowing the user to compare the spectra of selected configurations in the original fine energy structure or on any user-defined broader energy structure.

• Sensitivity coefficients (percent changes of k-effective due to elementary change of basic nuclear data) for the major nuclides and nuclear processes in a 30-group and 238-group energy structure. These data are currently only available for about 75% of experimental configurations.

DICE Home Page

Joint Evaluated Fission and Fusion File (JEFF) project

The Joint Evaluated Fission and Fusion File (JEFF) project is a collaboration between NEA Data Bank member countries. The JEFF library combines the efforts of the JEFF and EFF/EAF Working Groups to produce a common sets of evaluated nuclear data, mainly for fission and fusion applications.

JEFF Projects

Nuclear Data Sensitivity Tool (NDaST)

The Nuclear Data Sensitivity Tool (NDaST) is a Java based piece of software, designed to perform calculations on nuclear data sensitivity files for benchmark cases. These calculations are either:

• an estimation of the impact of nuclear data perturbations to the computed case results, and/or;

• calculation of the uncertainty in the computed results due to evaluated nuclear covariance data.

This allows simple and fast analysis for nuclear data evaluators to test the impact of revisions across a wide set of benchmarks. Users may also efficiently compare the difference in uncertainties obtained from various sources.

http://www.oecd-nea.org/ndast/

JANIS (Java-based nuclear information software)

JANIS (Java-based nuclear information software) is a display program designed to facilitate the visualisation and manipulation of nuclear data. Its objective is to allow the user of nuclear data to access numerical values and graphical representations without prior knowledge of the storage format. It offers maximum flexibility for the comparison of different nuclear data sets. It offers flexibility for the comparison of different nuclear data sets and offers a powerful and user-friendly interface. Janis is free of charge.

JANIS Home Page

UK Nuclear Science Forum (UKNSF)

UKNSF Home page

The UK Nuclear Science Forum (UKNSF) covers the measurement and evaluation of nuclear data for applications in the nuclear industry, nuclear medicine and protection of the environment. Nuclear data includes radioactive decay data, fission yields, neutron production and reaction cross-sections, spectra and angular distributions of emitted particles, integral data (e.g., (α,n) for thick targets) and charged particle and photon cross sections.

The UKNSF advises the UK representatives to the NEA Databank and the IAEA Nuclear Data Section on the needs of the UK in the field. Membership is open to all users, measurers and evaluators of nuclear data in the UK. There are two meetings a year, usually in May and November.