scholarly journals HPRL – International cooperation to identify and monitor priority nuclear data needs for nuclear applications

2020 ◽  
Vol 239 ◽  
pp. 15005
Author(s):  
E. Dupont ◽  
M. Bossant ◽  
R. Capote ◽  
A.D. Carlson ◽  
Y. Danon ◽  
...  
Keyword(s):  
Nuclear Energy ◽  
Working Party ◽  
Nuclear Data ◽  
Expert Group ◽  
Nuclear Science ◽  
Energy Neutron ◽  
International Experts ◽  
Nuclear Applications ◽  
The Web ◽  
High Priority Request

The OECD-NEA High Priority Request List (HPRL) is a point of reference to guide and stimulate the improvement of nuclear data for nuclear energy and other applications, and a tool to bridge the gap between data users and producers. The HPRL is application-driven and the requests are submitted by nuclear data users or representatives of the user’s communities. A panel of international experts reviews and monitors the requests in the framework of an Expert Group mandated by the NEA Nuclear Science Committee Working Party on International Nuclear Data Evaluation Cooperation (WPEC). After approval, individual requests are classified to three categories: high priority requests, general requests, and special purpose requests (e.g., dosimetry, standards). The HPRL is hosted by the NEA in the form of a relational database publicly available on the web. This paper provides an overview of HPRL entries, status and outlook. Examples of requests successfully completed are given and new requests are described with emphasis on updated nuclear data needs in the fields of nuclear energy, neutron standards and dosimetry.

scholarly journals OECD-NEA Expert Group on Multi-Physics Experimental Data, Benchmarks and Validation

2018 ◽  
Author(s):  
Timothy Valentine ◽  
Kostadin Ivanov ◽  
Maria Avramova ◽  
Alessandro Petruzzi ◽  
Jean-Pascal Hudelot ◽  
...  
Keyword(s):  
Experimental Data ◽  
Nuclear Energy ◽  
Great Promise ◽  
Expert Group ◽  
Energy Agency ◽  
Validation Data ◽  
Task Forces ◽  
Spatial Domains ◽  
Physics Modeling ◽  
Physical Phenomena

High-fidelity, multi-physics modeling and simulation (M&S) tools are being developed and utilized for a variety of applications in nuclear science and technology and show great promise in their abilities to reproduce observed phenomena for many applications. Even with the increasing fidelity and sophistication of coupled multi-physics M&S tools, the underpinning models and data still need to be validated against experiments that may require a more complex array of validation data because of the great breadth of the time, energy and spatial domains of the physical phenomena that are being simulated. The expert group on Multi-Physics Experimental Data, Benchmarks and Validation (MPEBV) of the Nuclear Energy Agency (NEA) of the Organization for Economic Cooperation and Development (OECD) was formed to address the challenges with the validation of such tools. The work of the MPEBV expert group is shared among three task forces to fulfill its mandate and specific exercises are being developed to demonstrate validation principles for common industrial challenges. This paper describes the overall mission of the group, the specific objectives of the task forces, the linkages among the task forces, and the development of a validation exercise that focuses on a specific reactor challenge problem.

scholarly journals ENDF/B-VII.0: Next Generation Evaluated Nuclear Data Library for Nuclear Science and Technology

2006 ◽  
Vol 107 (12) ◽  
pp. 2931-3060 ◽  
Author(s):  
M.B. Chadwick ◽  
P. Obložinský ◽  
M. Herman ◽  
N.M. Greene ◽  
R.D. McKnight ◽  
...  
Keyword(s):  
Science And Technology ◽  
Nuclear Data ◽  
Next Generation ◽  
Nuclear Science ◽  
Nuclear Data Library ◽  
Data Library ◽  
Evaluated Nuclear Data

scholarly journals Completeness of neutron-, photo-induced and spontaneous fission yields data

2020 ◽  
Vol 239 ◽  
pp. 09003
Author(s):  
B. Pritychenko ◽  
O. Schwerer ◽  
J. Totans ◽  
V. Zerkin ◽  
O. Gritzay
Keyword(s):  
Nuclear Reaction ◽  
Cross Sections ◽  
Data Center ◽  
Nuclear Data ◽  
Published Data ◽  
Data Sets ◽  
Scientific Publications ◽  
Nuclear Science ◽  
And Storage ◽  
Fission Yields

Nuclear data collection, evaluation and dissemination activities have been performed worldwide for many years. They are absolutely essential for the overall progress of science and technology to create the complete collections of experimental data sets and associated publications, and store these data in publicly accessible databases. Due to many historical and technological reasons not all published data have been identified and compiled. These "missing data" manifest themselves via scientific publications, data evaluations and nuclear databases comparisons. The detailed analysis of the Nuclear Science References (NSR) and the Experimental Nuclear Reaction (EXFOR) databases shows thousands of previously missed nuclear reaction experiments and creates a roadmap for the creation of complete data records for fission cross sections, yields and covariances. The National Nuclear Data Center (NNDC) program for identification, compilation and storage of missing fission yields data sets is described, and recommendations for improving the databases completeness are given.

scholarly journals OVERVIEW OF THE OECD-NEA EXPERT GROUP ON MULTI-PHYSICS EXPERIMENTAL DATA, BENCHMARKS AND VALIDATION

2021 ◽  
Vol 247 ◽  
pp. 06048
Author(s):  
Timothy Valentine ◽  
Maria Avramova ◽  
Michael Fleming ◽  
Mathieu Hursin ◽  
Kostadin Ivanov ◽  
...  
Keyword(s):  
Experimental Data ◽  
Nuclear Energy ◽  
Modelling And Simulation ◽  
Expert Group ◽  
Energy Agency ◽  
Simulation Tools ◽  
Task Forces ◽  
Physics Simulation ◽  
Benchmark Evaluation ◽  
Validation Experiments

The OECD Nuclear Energy Agency (NEA) Nuclear Science Committee (NSC) established the Expert Group on Multi-physics Experimental Data, Benchmarks and Validation (EGMPEBV) in 2014 to bridge the gap between advanced, multi-physics simulation capabilities and the relatively low availability of dedicated, high-fidelity experimental data and benchmarks specifically for multi-physics modelling and simulation tools. The EGMPEBV was mandated to establish mechanisms for the certification of experimental data and benchmark models and to establish the processes and procedures for the validation of multi-physics modelling and simulation tools. The EGMPEBV oversees three task forces, covering (1) experimental data qualification and benchmark evaluation, (2) validation guidelines and needs and (3) example application of validation experiments. These have generated numerous reports surveying the state-of-the-art in multi-physics validation, challenge areas and recommendations for the evaluation of multi-physics benchmarks, while in parallel developing the specifications for multi-physics benchmarks. Three benchmark specifications are in active development, including a reactivity compensation scenario in the Rostov Unit 2 VVER-1000, multi-cycle depletion of the TVA Watts Bar Unit 1 and study of pellet cladding mechanical interaction within ramp tests performed at the Studsvik R2 reactor. We provide an overview of the recent progress in these areas and a summary of the future activities of the EGMPEBV in establishing international multi-physics benchmarks.

Experience in Upgrading of Novi Han Repository

2001 ◽  
Author(s):  
Ira G. Stefanova ◽  
Mayia D. Mateeva
Keyword(s):  
Safety Assessment ◽  
Nuclear Energy ◽  
Nuclear Research ◽  
Radionuclide Inventory ◽  
Processing And Storage ◽  
Storage Structures ◽  
And Storage ◽  
Nuclear Applications ◽  
Selection Of

Abstract Novi Han Repository is the only existing repository in Bulgaria for the disposal of radioactive waste from nuclear applications in industry, medicine and research. The repository was constructed in the early sixties according to the existing requirements. It was operated by the Institute for Nuclear Research and Nuclear Energy for more than thirty years without any accident or release of radioactivity to the environment, but without any investment for upgrading. As a consequence, the Bulgarian Nuclear Safety Authority temporarily stopped the operation of the repository in 1994. The measures for upgrading Novi Han Repository, supported by the IAEA with TC Project BUL/4/005 “Increasing Safety of Novi Han Repository”, are presented in this paper. They consist of: assessment of radionuclide inventory and future waste arisings, characterization of disposal vaults, characterization of the site, safety assessment, upgrading of the monitoring system, option study for the selection of treatment and conditioning processes and the development of a conceptual design for low and intermediate level waste processing and storage facility, immediate measures for improvement of the existing disposal vaults and infrastructure, and construction of above-ground temporary storage structures. The outstanding activities for re-opening of the Novi Han Repository and implementation of the measures for reconstruction of the Novi Han Repository are discussed.

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