The International Reactor Physics Experiment Evaluation (IRPhE) Project provides the nuclear community with qualified benchmark data sets by collecting reactor physics experimental data from nuclear facilities worldwide. More specifically, the objectives of the expert group are as follows:
Experiments where interest and priority are expressed by member countries or working parties and executive groups within the NEA to provide guidance or co-ordination in:
The Expert Group:
The secretariat of the group is provided by the NEA Data Bank, in charge of the management of the material released to the project. The IRPhE Technical Review Group is chaired and co-ordinated by John D. Bess from Idaho National Laboratory (INL), United States.
The group currently:
The following type of measurements are included:
The benchmark specifications and experimental data are intended for use by nuclear reactor physicists and engineers to validate current and new calculational schemes. It includes computer codes and nuclear data libraries for assessing uncertainties, confidence bounds and safety margins, and to record measurement methods and techniques.
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IRPhE co-operates with the International Criticality Safety Benchmark Evaluation Project (ICSBEP).
Much of the work realised so far by the International Reactor Physics Experiment Evaluation (IRPhE) Project, in particular, the evaluation and review of selected benchmark experiments, was possible thanks to substantial funding provided by the Government of Japan. Argentina, Belgium, Brazil, Canada, China, Czechia, France, Germany, Hungary, Italy, Japan, Korea, Russia, Serbia, Slovenia, South Africa, Sweden, Switzerland, United Kingdom, and the United States have contributed evaluations, reviews and data at their own expense. Overall technical coordination of the IRPhE Project is directly supported by the United States Department of Energy's Office of Nuclear Energy with significant in-kind contributions from the NEA International Criticality Safety Benchmark Evaluation Project (ICSBEP), supported in the United States by the Department of Energy's Office of Facility Management and ES&H Support.
The International Criticality Safety Benchmark Evaluation Project (ICSBEP) Handbook contains criticality safety benchmark specifications that have been derived from experiments that were performed at various critical facilities around the world.
The International Handbook of Evaluated Reactor Physics Benchmark Experiments (IRPhE) contains reactor physics benchmark specifications that have been derived from experiments that were performed at various nuclear facilities around the world.
The IRPhEP Database and Analysis Tool (IDAT) was first released in 2013 and is included on the IRPhE Handbook DVD. This database and corresponding user interface allows easy access to handbook information. Selected information from each configuration was entered into IDAT, such as the measurements performed, benchmark values, calculated values and materials specifications of the benchmark. In many cases this is supplemented with calculated data such as neutron balance data, spectra data, k-eff nuclear data sensitivities, and spatial reaction rate plots.
The Working Party on Scientific Issues and Uncertainty Analysis of Reactor Systems (WPRS) studies the reactor physics, fuel performance, and radiation transport and shielding in present and future nuclear power systems.