The NEA's nuclear data evaluation co-operation activities involve the following evaluation projects: ENDF (United States), JENDL (Japan), ROSFOND/BROND (Russia), JEFF (other Data Bank member countries) and CENDL (China) in close co-operation with 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
| B | Recommended Definition of a General Nuclear Database Structure | |
| Co-ordinator: D. Brown | ||
| C | High Priority Request List (HPRL) | |
| Co-ordinator: E. Dupont |
Short-term subgroups
| 1 | Comparison of evaluated data for Chromium-52, Iron-56 and Nickel-58 | Volume 1 (1992) |
| Co-ordinator: C.Y. Fu | ||
| 2 | Generation of covariance files for Iron-56 and natural Iron | Volume 2 (1994) |
| Co-ordinator: H. Vonach | ||
| 3 | Actinide data in the thermal range | Volume 3 (1994) |
| Co-ordinator: H. Tellier and H. Weigmann | ||
| 4 | Uranium-238 capture and inelastic cross-sections | Volume 4 (1999) |
| Co-ordinator: M. Baba | ||
| 5 | Plutonium-239 fission cross-section between 1 and 100 keV | Volume 5 (1994) |
| Co-ordinator: E. Fort | ||
| 6 | Delayed neutron data | Volume 6 (2002) |
| Co-ordinator: A. d'Angelo | ||
| 7 | Nuclear data standards | Volume 7 (2006) |
| Co-ordinator: A. Carlson | ||
| 8 | Present status of minor actinide data | Volume 8 (1999) |
| Co-ordinator: T. Nakagawa and H. Takano | ||
| 9 | Fission neutron spectra | Volume 9 (2003) |
| Co-ordinator: D. Madland | ||
| 10 | Evaluation method of inelastic scattering cross-sections for weakly absorbing fission-product nuclides | Volume 10 (2001) |
| Co-ordinator: M. Kawai | ||
| 11 | Subgroup cancelled | |
| 12 | Nuclear models to 200 MeV for high-energy data evaluations | Volume 12 (1998) |
| Co-ordinator: M. Chadwick | ||
| 13 | Intermediate energy data | Volume 13 (1998) |
| Co-ordinator: A. Koning and T. Fukahori | ||
| 14 | Processing and validation of intermediate energy data files | Volume 14 (2000) |
| Co-ordinator: A. Koning | ||
| 15 | Cross-section fluctuations and self-shielding effects in the unresolved resonance region | Volume 15 (1995) |
| Co-ordinator: F. Fröhner | ||
| 16 | Effects of shape differences in the level densities of three formalisms on calculated cross-sections | Volume 16 (1998) |
| Co-ordinators: C.Y. Fu and M. Chadwick | ||
| 17 | Status of pseudo-fission product cross-sections for fast reactors | Volume 17 (1998) |
| Co-ordinator: H. Gruppelaar | ||
| 18 | Epithermal capture of Uranium-235 | Volume 18 (1999) |
| Co-ordinator: C. Lubitz | ||
| 19 | Activation cross-sections | Volume 19 (2005) |
| Co-ordinator: A. Plompen | ||
| 20 | Covariance matrix evaluation and processing in the resonance region | Volume 20 (2006) |
| Co-ordinator: T. Kawano | ||
| 21 | Assessment of neutron cross-section evaluations for the bulk of fission products | Volume 21 (2005) |
| Co-ordinator: P. Oblozinsky | ||
| 22 | Nuclear data for improved LEU-LWR reactivity predictions | Volume 22 (2006) |
| Co-ordinator: A. Courcelle | ||
| 23 | Evaluated data library for the bulk of the fission products | Volume 23 (2009) |
| Co-ordinator: P. Oblozinsky | ||
| 24 | Covariance data in the fast neutron region | Volume 24 (2011) |
| Co-ordinator: M. Herman | ||
| 25 | Assessment of fission product decay data for decay heat calculations | Volume 25 (2007) |
| Co-ordinator: T. Yoshida | ||
| 26 | Uncertainty and target accuracy assessment for innovative systems using recent covariance data evaluations | Volume 26 (2008) |
| Co-ordinator: M. Salvatores | ||
| 27 | Prompt photon production from fission products | Status: Completed |
| Co-ordinator: R. Jacqmin | ||
| 28 | Processing of covariance data in the resonance region | Status: Completed |
| Co-ordinator: M. Dunn | ||
| 29 | Uranium-235 capture cross section in the keV to MeV energy region | Volume 29 (2011) |
| Co-ordinator: O. Iwamoto | ||
| 30 | Improvement of accessibility and quality of the EXFOR database | Volume 30 (2011) |
| Co-ordinator: A. Koning | ||
| 31 | Meeting nuclear data needs for advanced reactor systems | Volume 31 (2014) |
| Co-ordinator: H. Harada | ||
| 32 | Unresolved resonance treatment for cross section and covariance representation | Volume 32 (2011) |
| Co-ordinator: L. Leal | ||
| 33 | Methods and issues for the combined use of integral experiments and covariance data | Volume 33 (2013) |
| Co-ordinator: G. Palmiotti and M. Salvatores | ||
| 34 | Coordinated evaluation of Plutonium-239 in the resonance region | Volume 34 (2014) |
| Co-ordinator: C. De Saint-Jean | ||
| 35 | Scattering angular distribution in the fast energy range | Status: Completed |
| Co-ordinator: T. Kawano | ||
| 36 | Evaluation of experimental data in the resolved resonance region | Status: Closing |
| Co-ordinator: P. Schillebeeckx | ||
| 37 | Improved fission product yield evaluation methodologies | Status: Ongoing |
| Co-ordinator: R.W. Mills | ||
| 38 | Beyond the ENDF format: A modern nuclear database structure | Status: Ongoing |
| Co-ordinator: D. McNabb | ||
| 39 | Methods and approaches to provide feedback from nuclear and covariance data adjustment for improvement of nuclear data files |
Status: Ongoing |
| Co-ordinator: G. Palmiotti and M. Salvatores | ||
| 40 | Collaborative International Evaluated Library Organisation (CIELO) Pilot Project | Status: Ongoing |
| Co-ordinator: M. Chadwick | ||
| 41 | Improving nuclear data accuracy of Am-241 and Np-237 capture cross-sections | Status: Starting |
| Co-ordinator: H. Harada | ||
| 42 | Thermal Scattering Kernel S(α,β): Measurement, Evaluation and Application | Status: Starting |
| Co-ordinator: G. Noguere | ||
| 43 | Code infrastructure to support a modern general nuclear database (GND) structure | |
| Co-ordinator: F. Malvagi | ||
| 44 | Investigation of Covariance Data in General Purpose Nuclear Data Libraries | |
| Co-ordinators: V. Sobes and C.de Saint Jean | ||
| 45 | Validation of Nuclear Data Libraries (VaNDaL) Project | |
| Co-ordinators: M. White and D. Bernard Monitor: A. Trkov |
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| 46 | Efficient and Effective Use of Integral Experiments for Nuclear Data Validation | |
| Co-ordinators: M. Salvatores and G. Palmiotti Monitors: A. Plompen, M. Herman |