9 August 2005.
   - New WIMSD libraries were added based on the JEFF-3.1 library.
   - Several programs and procedures were corrected or updated.
   - Release of XnWlup package version 3.0.
   - IRPhE D2O benchmarks added to the benchmarking sequence.
   - Plottings were added.

WLUP HISTORY

The idea for a project to update the multi-group nuclear data input library of the WIMS code grew out of discussions between the participants, lecturers and directors of the Joint IAEA/ICTP Workshop on Reactor Physics Calculations for Applications in Nuclear Technology held at the ICTP, Trieste from 12 February to 16 March 1990. This idea was in line with the relevant conclusions and recommendations of the Technical Committee Meeting on In-core Fuel Management held by the IAEA in Vienna, 4-7 December 1989.

The WIMS Library Update Project (WLUP) was organised by the Nuclear Data Section of the IAEA. The "Jozef Stefan" Institute was supported by the IAEA through a research contract to co-ordinate the technical issues related with the project. It should be noted that except for the coordination work and some IAEA fellowships the participants contributed to the project on a voluntary basis.

The Sub-Committee on Nuclear Data Technology Transfer of the INDC, 19th Meeting, 8-12 March 1993, strongly endorsed the continuation of the WIMS Library Update Project in order to make available updated multi-group cross sections in WIMS-D format for thermal research and power reactor applications and stated that this project was also in line with the Agency's objectives on technology transfer.

The project was also recommended by the participants of the IAEA Consultants Meeting on processing of nuclear data, held in 1993 and by the specialists from developing countries who attended the IAEA/ICTP Workshop on Reactor Calculations, Design and Safety in 1994.

In 1996 the Physics Division of the IAEA took the initiative to set up the WLUP as a Co-ordinated Research Project (CRP). Such an organisational scheme speeded up the work on completing the updated WIMS-D library and allowed its extensive validation for thermal reactor lattice calculations.

The final stage of WLUP as a Co-ordinated Research Project (CRP) began in December 1998, with research contracts or agreements for participants from Argentine, Bangladesh, China, Cuba, India, Korea, Morocco, Poland, Russia, Slovenia and the U.S. Research Co-ordination Meetings were held in Vienna, Austria (1999), Bariloche, Argentina (2000) and Vienna, Austria (2001).

On completion of WLUP the following products are freely available for WIMS-D users:

• WIMSD-IAEA-69 group cross section library: It includes more than 170 materials from selected evaluated nuclear data files in an energy structure of 69 groups. The library was extensively validated over 200 benchmark cases.
• WIMSD-IAEA-172 group cross section library:It includes more than 170 materials from selected evaluated nuclear data files in an energy structure of 172 groups. The library was extensively validated over 200 benchmark cases.
• IAEA-TECDOC with detailed documentation
• NJOY inputs for evaluated nuclear data processing.
• Benchmarks inputs for the WIMS-D code.
• Benchmarks results for the libraries considered on WLUP.
• Auxiliary codes and procedures to update and to maintain the WIMS-D library.
• WIMS-D updates to extent the code capabilities.