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

The NEA's nuclear data evaluation co-operation activities involve the follwowing evaluation projects: ENDF (United States), JEFF (Data Bank member countries), JENDL (Japan). The participation from projects in non-OECD Member countries, such as BROND and 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.

Activities

Long-term subgroups

C

High Priority Request List

Co-ordinator: A. Plompen
Status: 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 the end of 2011)

28

 Processing of Covariance Data
Co-ordinator: M. Dunn
Status: Completed (final report expected by the end of 2011)

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: Started in June 2010

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: On-going (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: Started in June 2010

35

 Scattering Angular Distribution in the Fast Energy Range
Co-ordinator: T. Kawano
Status: Started in June 2010

36

 Evaluation of experimental data in the resolved resonance region
Co-ordinator: P. Schillebeeckx
Status: Started in June 2010

The collection of published reports (as of January 2010) is available on CD-ROM.

List of WPEC working documents

Template for new subgroup proposals (Word format)

 

Meetings

The 23rd meeting of the working party was held on 12-13 May 2011 at the NEA Headquarters, Issy-les-Moulineaux, France.
The 24th meeting of the working party will be held on 24-25 May 2012 at the NEA Headquarters, Issy-les-Moulineaux, France.

Related conferences

Keywords

Nuclear Data, Evaluation, JEFF, ENDF, JENDL, BROND, CENDL, FENDL

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Last update: 7 October 2011