JANIS: NEA JAva-based Nuclear Data Information System

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Introduction
JANIS [1] software is developed by the NEA Data Bank to facilitate the visualization and manipulation of nuclear data, giving access to evaluated data libraries, and to the EXFOR and CINDA databases [2].It is available in several ways: as a standalone Java software, downloadable from the web and distributed on DVD and also a web application available on the NEA website.JANIS 4.0 was delivered in September 2013 [1] and new features described below will be available in JANIS 4.1.
A summary of JANIS databases and JANIS handbooks is presented in the paper.The procedure used to process evaluated data files into JANIS database is also described.
Recent NEA software developments rely on JANIS to access nuclear data such as covariances for the Nuclear Data Sensitivity Tool (NDaST) [3] and automated plots generation for the Nuclear Data Evaluation Cycle (NDEC) system [4].The features recently added, notably automated plots generation through scripting via the command line and improvement of covariance data support are described, along with some example of the use of JANIS.

JANIS databases
Neutron evaluated libraries (e.g.TENDL-2015 [5]) are processed for being uploaded in JANIS Database (see Fig. 1) by merging ENDF-6 (original files) and PENDF (reconstructed-pointwise ENDF) files to produce HENDF (Hybrid ENDF) files, an acronym used at NEA, which includes reconstructed cross section from MF3, in consistency with MF33 covariance data when necessary, plus all the other MF data included in the original ENDF-6 format file.
Figure 2 presents the procedure to generate HENDF files.The processing code system used is essentially a e-mail: Nicolas.SOPPERA@oecd.orgNJOY2012.50[6] together with routines from the PREPRO and ENDF Checking & Utility packages.The NJOY modules used in this processing are: MODER, RECONR, BROADR, HEATR, GASPR, ERRORR and COVR.For HENDF files, PENDF data are generated with general tolerance criteria for the reconstruction, thinning and broadening of 0.5%, at 293.6K.The processed data contain kinematic kerma factors, total damage energy production and gas production cross section whenever such data are contained in the ENDF library.Processing covariance data into ERRORR and BOXER formats is carried out using SCALE-238 group structure.
Therefore, at the end of the processing three files are generated: one HENDF, one BOXER (if evaluated file provides covariance data) and one INTER (containing cross section integral data).These three files are then uploaded into JANIS database.
The content of all JANIS databases is summarized in Table 1.
NEA Data Bank is working on "Nuclear Data Evaluation Cycle" (NDEC) system [4], a systematized workflow for the verification, processing, differential validation and integral benchmarking of evaluated nuclear data.As one of its goal of taking advantage of synergies among NEA tools, NDEC has facilitated and automatized the processing of recent nuclear data libraries for JANIS database (e.g.TENDL-2015, FENDL-3.1b,BROND-3.1,IRDFF-1.05).

JANIS Web
The online nuclear data services are now provided through direct access to the JANIS databases taking advantage of the new Web interface of JANIS, which allows online browsing, searching and displaying nuclear data without requiring a Java Virtual Machine.The online services also include JANIS Books.The JANIS Books [1] are compilations of crosssection curves of evaluated and experimental data from a number of libraries, nuclear reactions and associated reaction products.JANIS Books are available for nuclear reactions induced by neutrons, photons and lightcharged particles.Online JANIS Books (JANIS web) are interactive versions that allow the users to zoom, access complementary information and plot additional data, as shown with the screenshot in Fig. 3 (e.g. 238U total cross section).JANIS Books are also available for download in PDF format, showing in each page a cross section, with two plots plus integral values obtained from INTER.

ND2016
JANIS can visualize different formats of uncertainties, both ENDF6/MF33 format and processed format, such as BOXER, ERRORR and COVERX.Recent new tools developed at NEA rely on JANIS features to access nuclear data, for example the Nuclear Data Sensitivity Tool (NDaST) which makes use of the BOXER and COVERX formats support and the JANIS database to retrieve covariance data.

JANIS' new feature: The command line
The JANIS command line was initially developed to satisfy specific users' requests.The basic syntax of the command

Conclusions and outlook
JANIS has been developed to provide a user-friendly access to evaluated, experimental and bibliographic data available in ENDF and EXFOR/CINDA libraries.The NEA maintains the JANIS software and its database upto-date, while developing new features and capabilities after collecting information and feedback from a broad community of users: nuclear data experimentalists, EXFOR compilers, evaluators of nuclear data and users of nuclear data in many applications such as fission reactor neutronics, criticality, safety, waste management, fusion applications, material radiation damage . . .
An upcoming challenge will be to adapt to the successor of ENDF format which is currently being defined by the nuclear data community.

Figure 4 .
Figure 4. JANIS automated plots generation through scripting via command line.

Table 1 .
Nuclear data libraries available in the NEA/JANIS database.