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International Cooperation in Nuclear Data Evaluation
M. Herman,J. Katakura,A. J. Koning,C. Nordborg 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The OECD Nuclear Energy Agency (NEA) is organising a co-operation between the major nuclear data evaluation projects in the world. The co-operation involves the ENDF, JEFF, and JENDL projects, and, owing to the collaboration with the International Atomic Energy Agency (IAEA), also the Russian BROND and the Chinese CENDL projects. The Working Party on international nuclear data Evaluation Cooperation (WPEC), comprised of about 20 core members, manages this co-operation and meets annually to discuss progress in each evaluation project and also related experimental activities. The WPEC assesses common needs for nuclear data improvements and these needs are then addressed by initiating joint evaluation efforts. The work is performed in specially established subgroups, consisting of experts from the participating evaluation projects. The outcome of these subgroups is published in reports, issued by the NEA. Current WPEC activities comprise for example a number of studies related tonuclear data uncertainties, including a review of methods for the combined use of integral experiments and covariance data, as well as evaluations of some of the major actinides, such as ^(235)U and ^(239)Pu. This paper gives an overview of current and planned activities within the WPEC.
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Overview of the OECD NEA Data Bank Activities
E. Dupont,J. Galan,J. Gulliford,C. Nordborg,Y. Rugama 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The OECD Nuclear Energy Agency Data Bank operates as an international centre of reference for its member countries with respect to basic tools, such as computer codes and data, for use in different nuclear applications. The NEA Data Bank, as part of an international network of data centres, maintains large databases containing experimental (EXFOR), bibliographic (CINDA), and evaluated (EVA) nuclear data, and makes them available online via its website or via the JANIS display program. As part of its responsibilities, the Data Bank is also in charge of the compilation, verification, and distribution of the Joint Evaluated Fission and Fusion (JEFF) library. In addition, the Data Bank provides a service to its users by collecting, validating and making available upon request computer codes and associated application data libraries in many different areas relevant to the nuclear field. As part of its knowledge preservation activities, large collections of integral benchmark experiments for data and code validation are also available in areas such as criticality safety (ICSBEP), reactor physics (IRPhE), fuel performance (IFPE), and radiation shielding (SINBAD). Finally, the Data Bank coordinates the development and distribution of a database of recommended chemical thermodynamic data (TDB) for radioactive waste management applications. The Data Bank provides also support to other NEA divisions, a major part of this support is allocated to the NEA Science programme.
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Status of the JEFF Nuclear Data Library
A. J. Koning,E. Bauge,C. J. Dean,E. Dupont,U. Fischer,R. A. Forrest,R. Jacqmin,H. Leeb,M. A. Kellett,R. W. Mills,C. Nordborg,M. Pescarini,Y. Rugama,P. Rullhusen 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The status of the Joint Evaluated Fission and Fusion file (JEFF) is described. Recently, the JEFF-3.1.1 nuclear data library was released and shortly after adopted by the French nuclear power industry for inclusion in their production and analysis codes. Recent updates include actinide evaluations, materials evaluations that have emerged from various European nuclear data projects, the activation library, the decay data and fission yield sub-libraries, and fusion-related data files from the European F4E project. The revisions were motivated by the availability of new measurements, modelling capabilities and trends from integral experiments. Validations have been performed, mainly for criticality, reactivity temperature coefficients, fuel inventory, decay heat and shielding of thermal and fast systems. The next release of the library, JEFF-3.2, will be discussed. This will contain among others a significant increase of covariance data evaluations, modern evaluations for various structural materials, a larger emphasis on minor actinides and addition of high-quality gamma production data for many fission products.
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