Abstract
The challenge for any nuclear data evaluation project is to periodically release a revised, fully consistent and complete library, with all needed data and covariances, and ensure that it is robust and reliable for a variety of applications. Within an evaluation effort, benchmarking activities play an important role in validating proposed libraries. The Joint Evaluated Fission and Fusion (JEFF) Project aims to provide such a nuclear data library, and thus, requires a coherent and efficient benchmarking process. The aim of this paper is to present the activities carried out by the new JEFF Benchmarking and Validation Working Group, and to describe the role of the NEA Data Bank in this context. The paper will also review the status of preliminary benchmarking for the next JEFF-3.3 candidate cross-section files.
Highlights
The current evaluations of neutron induced cross sections are based on differential and integral experiments as well as nuclear reaction models
The working group will exchange and cross-check benchmark input decks, discuss benchmarking suites to be used, selection of pertinent validation cases for all nuclides in the library, and provide as complete as possible a multi-purpose validation suite. Institutions such as CIEMAT, ENEA, SCK·CEN, KIT, UKAEA, IRSN, KAERI, JSI, CEA, PSI, JRC, UPM, NRG and NEA have agreed to join efforts to providing thorough benchmarking for upcoming Joint Evaluated Fission and Fusion (JEFF) candidate files. The centralization of these tasks relies on the NEA Data Bank to implement and co-ordinate a comprehensive process involving verification, testing and benchmarking tasks according to well-defined criteria, while assessing the needs for benchmarking efforts in participating institutions and helping streamline and rationalize these activities, in particular testing and benchmarking
This paper has collected all of the benchmarking activities performed by both the evaluation community and the user community within the JEFF project
Summary
The current evaluations of neutron induced cross sections are based on differential and integral experiments as well as nuclear reaction models. In addition to carrying out the Project secretariat tasks, and as part of broader nuclear data services to participating countries, the NEA Data Bank provides a number of services with the JEFF files such as consistency checks, conversion to various pointwise or multigroup formats, file testing and benchmarking using open databases such as ICSBEP and SINBAD. To provide these services the Nuclear Data Evaluated Cycle (NDEC) [4] platform is developed and implemented at the Data Bank.
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