Working Party on International Nuclear Data Evaluation Co-operation (WPEC)

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

 C High Priority Request List (HPRL)  
  Co-ordinator: A. Plompen  

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 Status: Completed
  Co-ordinator: C. De Saint-Jean
 
 
 35 Scattering angular distribution in the fast energy range Status: Closing
  Co-ordinator: T. Kawano
 
 
 36 Evaluation of experimental data in the resolved resonance region Status: Ongoing
  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: Starting
  Co-ordinator: G. Palmiotti and M. Salvatores
 
 
 40 Collaborative International Evaluated Library Organisation (CIELO) Pilot Project Status: Starting
  Co-ordinator: M. Chadwick
 
 

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NEA contact: Emmeric Dupont ( )

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Last update: 10 March 2014