The NEA's nuclear data evaluation co-operation activities involve the follwowing evaluation projects: ENDF (United States), JEFF (Data Bank member countries), JENDL (Japan) and RUSFOND/BROND (Russia). The participation from projects in non-NEA Member countries, such as CENDL, is channelled through the Nuclear Data Section of the International Atomic Energy Agency (IAEA).
The working party was established to promote the exchange of information on nuclear data evaluations, measurements, nuclear model calculations, validation, and related topics, and to provide a framework for co-operative activities between the participating projects. The working party assesses nuclear data improvement needs and addresses these needs by initiating joint evaluation and/or measurement efforts.
Long-term subgroups
| C | High Priority Request List |
| Co-ordinator: A. Plompen | |
| Status: Ongoing - See the HPRL web page |
Short-term subgroups
| 1 | Comparison of Evaluated Data for Chronium-52, Iron-56 and Nickel-58 |
| Co-ordinator: C.Y. Fu | |
| Status: Published (Volume 1) | |
| 2 | Generation of Covariance Files for Iron-56 and Natural Iron |
| Co-ordinator: H. Vonach | |
| Status: Published (Volume 2) | |
| 3 | Actinide Data in the Thermal Range |
| Co-ordinator: H. Tellier and H. Weigmann | |
| Status: Published (Volume 3) | |
| 4 | 238U Capture and Inelastic Cross-sections |
| Co-ordinator: M. Baba | |
| Status: Published (Volume 4) | |
| 5 | Plutonium-239 Fission Cross-section Between 1 and 100 keV |
| Co-ordinator: E. Fort | |
| Status: Published (Volume 5) | |
| 6 | Delayed Neutron Data |
| Co-ordinator: A. d'Angelo | |
| Status: Published (Volume 6) | |
| 7 | Nuclear Data Standards |
| Co-ordinator: A. Carlson | |
| Status: Published (Volume 7) | |
| 8 | Present Status of Minor Actinide Data |
| Co-ordinator: T. Nakagawa and H. Takano | |
| Status: Published (Volume 8 (1 MB)) | |
| 9 | Fission Neutron Spectra |
| Co-ordinator: D. Madland | |
| Status: Published (Volume 9) | |
| 10 | Evaluation Method of Inelastic Scattering Cross-sections for Weakly Absorbing Fission-product Nuclides |
| Co-ordinator: M. Kawai | |
| Status: Published (Volume 10 (1 MB)) | |
| 12 | Nuclear Models to 200 MeV for High-energy Data Evaluations |
| Co-ordinator: M. Chadwick | |
| Status: Published (Volume 12) | |
| 13 | Intermediate Energy Data |
| Co-ordinator: A. Koning and T. Fukahori | |
| Status: Published (Volume 13) | |
| 14 | Processing and Validation of Intermediate Energy Data Files |
| Co-ordinator: A. Koning | |
| Status: Published (Volume 14) | |
| 15 | Cross-section Fluctuations and Self-shielding Effects in the Unresolved Resonance Region |
| Co-ordinator: F. Fröhner | |
| Status: Published (Volume 15) | |
| 16 | Effects of Shape Differences in the Level Densities of Three Formalisms on Calculated Cross-sections |
| Co-ordinators: C.Y. Fu and M. Chadwick | |
| Status: Published (Volume 16) | |
| 17 | Status of Pseudo-fission product Cross-sections for Fast Reactors |
| Co-ordinator: H. Gruppelaar | |
| Status: Published (Volume 17) | |
| 18 | Epithermal Capture of 235U |
| Co-ordinator: C. Lubitz | |
| Status: Published (Volume 18) | |
| 19 | Activation Cross-Sections |
| Co-ordinator: A. Plompen | |
| Status: Published (Volume 19 (7 MB)) | |
| 20 | Evaluation and Processing of Covariance Data |
| Co-ordinator: T. Kawano | |
| Status: Published (Volume 20) | |
| 21 | Assessment of Neutron Cross-Section Evaluations for the Bulk of Fission Products |
| Co-ordinator: P. Oblozinsky | |
| Status: Published (Volume 21) | |
| 22 | Nuclear Data for Improved LEU-LWR Reactivity Predictions |
| Co-ordinator: A. Courcelle | |
| Status: Published (Volume 22) | |
| 23 | Evaluated Data Library for the Bulk of the Fission Products |
| Co-ordinator: P. Oblozinsky | |
| Status: Published (Volume 23) | |
| 24 | Covariance Data in the Fast Neutron Region |
| Co-ordinator: M. Herman | |
| Status: Published (Volume 24 (2.5 MB)) | |
| 25 | Assessment of Fission Product Decay Data for Decay Heat Calculations |
| Co-ordinator: T. Yoshida | |
| Status: Published (Volume 25) | |
| 26 | Uncertainty and Target Accuracy Assessment for Innovative Systems Using Recent Covariance Data Evaluations |
| Co-ordinator: M. Salvatores | |
| Status: Published (Volume 26 (6 MB)) | |
| 27 | Prompt Photon Production from Fission Products |
| Co-ordinator: R. Jacqmin | |
| Status: Completed (final report expected by mid 2013) | |
| 28 | Processing of Covariance Data in the Resonance Region |
| Co-ordinator: M. Dunn | |
| Status: Completed (final report expected by mid 2013) | |
| 29 | U-235 Capture Cross Section in the keV to MeV Energy Region |
| Co-ordinator: O. Iwamoto | |
| Status: Published (Volume 29 (2 MB)) | |
| 30 | Improvement of Accessibility and Quality of the EXFOR Database |
| Co-ordinator: A. Koning | |
| Status: Published (Volume 30) | |
| 31 | Meeting Nuclear Data Needs for Advanced Reactor Systems |
| Co-ordinator: H. Harada | |
| Status: Completed (final report expected by mid 2013) | |
| 32 | Unresolved resonance treatment for cross section and covariance representation |
| Co-ordinator: L. Leal | |
| Status: Published (Volume 32) | |
| 33 | Methods and issues for the combined use of integral experiments and covariance data |
| Co-ordinator: G. Palmiotti and M. Salvatores | |
| Status: Ongoing (see the Intermediate Report on the Assessment of Existing Nuclear Data Adjustment Methodologies) | |
| 34 | Coordinated evaluation of 239Pu in the resonance region |
| Co-ordinator: C. De Saint-Jean | |
| Status: Ongoing | |
| 35 | Scattering Angular Distribution in the Fast Energy Range |
| Co-ordinator: T. Kawano | |
| Status: Ongoing | |
| 36 | Evaluation of experimental data in the resolved resonance region |
| Co-ordinator: P. Schillebeeckx | |
| Status: Ongoing | |
| 37 | Improved fission product yield evaluation methodologies |
| Co-ordinator: R.W. Mills | |
| Status: started | |
| 38 | Beyond the ENDF format: A modern nuclear database structure |
| Co-ordinator: D. McNabb | |
| Status: Ongoing | |
The 24th meeting of the working party was held on 24-25 May 2012 at the NEA Headquarters, Issy-les-Moulineaux, France.
The 25th meeting of the working party was held on 23-24 May 2013 at the NEA Headquarters, Issy-les-Moulineaux, France.
NEA contact: Emmeric Dupont (
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