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Abstract. 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 and graphical representations without prior knowledge of the storage format. Several standardised data formats are supported, and data originating from the major evaluation libraries, such as ENDF/B, JEFF, JENDL, BROND, etc., can be displayed, inter-correlated, and compared with experimental reaction data in the database EXFOR. Various navigation tools are available to identify the nucleus of interest, and the properties of the selected nuclide are displayed using textual, graphical or tabular formats. JANIS includes the bibliographical database CINDA, where charged particle data has been added recently permitting to establish a link between CINDA and EXFOR. JANIS has developed into a popular tool among researchers and data evaluators and the number of users increase steadily. The program's database is queried over 25,000 times per month. Features included in the latest release are described, and examples given on the use of JANIS.

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Abstract. JANIS (JAva-based Nuclear Data Information System) software is developed by the OECD Nuclear Energy Agency (NEA)

Abstract. Following the release and initial testing period of the NEA's Nuclear Data Sensitivity Tool [1], new features have been designed and implemented in order to expand its uncertainty analysis capabilities. The aim is to provide a free online tool for integral benchmark testing, that is both efficient and comprehensive, meeting the needs of the nuclear data and benchmark testing communities. New features include access to P1 sensitivities for neutron scattering angular distribution [2] and constrained Chi sensitivities for the prompt fission neutron energy sampling. Both of these are compatible with covariance data accessed via the JANIS nuclear data software, enabling propagation of the resultant uncertainties in k eff to a large series of integral experiment benchmarks. These capabilities are available using a number of different covariance libraries e.g., ENDF/B, JEFF, JENDL and TENDL, allowing comparison of the broad range of results it is possible to obtain. The IRPhE database of reactor physics measurements is now also accessible within the tool in addition to the criticality benchmarks from ICSBEP. Other improvements include the ability to determine and visualise the energy dependence of a given calculated result in order to better identify specific regions of importance or high uncertainty contribution. Sorting and statistical analysis of the selected benchmark suite is now also provided. Examples of the plots generated by the software are included to illustrate such capabilities. Finally, a number of analytical expressions, for example Maxwellian and Watt fission spectra will be included. This will allow the analyst to determine the impact of varying such distributions within the data evaluation, either through adjustment of parameters within the expressions, or by comparison to a more general probability distribution fitted to measured data. The impact of such changes is verified through calculations which are compared to a 'direct' measurement found by adjustment of the original ENDF format file.

Abstract. 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 and graphical representations without prior knowledge of the storage format. Several standardised data formats are supported, and data originating from the major evaluation libraries, such as ENDF/B, JEFF, JENDL, BROND, etc., can be displayed, inter-correlated, and compared with experimental reaction data in the database EXFOR. Various navigation tools are available to identify the nucleus of interest, and the properties of the selected nuclide are displayed using textual, graphical or tabular formats. JANIS includes the bibliographical database CINDA, where charged particle data has been added recently permitting to establish a link between CINDA and EXFOR. JANIS has developed into a popular tool among researchers and data evaluators and the number of users increase steadily. The program's database is queried over 25,000 times per month. Features included in the latest release are described, and examples given on the use of JANIS.