Nuclear Data Section

CRP on Prompt Fission Neutron Spectra of Actinides

ANNOUNCEMENT

The second Research Coordination Meeting will be held at IAEA headquarters, Vienna, Austria on 13-16 December, 2011.

SUMMARY

The energy spectrum of prompt neutrons emitted in fission plays an important role in many applications in nuclear science. The Co-ordinated Research Project on "Prompt fission neutron spectra of actinides" has been initiated to provide data on prompt fission neutron spectra for major actinides in ENDF forma. The outcome would be a recommended evaluation of prompt fission spectra with covariances from thermal to 20 MeV of incident neutron energy for U-233,235,238, Pu-239 and Th-232 nuclei, including validation against integral critical assembly and dosimetry data. Selected minor actinides (e.g. Np-237, Am-241, Pu-240, Cm-245, etc) may be also considered. Reactor operators and designers will draw upon data generated from this CRP to improve both operational safety and efficiency. Modelling efforts will use these data in diagnosing reactors and critical devices and in optimising design parameters in future reactors.

OBJECTIVES

Overall Objective

To improve the description of prompt fission neutron spectra (PFNS) allowing for a more accurate neutron balance calculation in reactor applications.

Specific Research Objectives

make available existing experimental information on PFNS relevant to fission reactors' applications, which can be processed and used by users worldwide,
incorporate available experimental information on PFNS for major actinides into evaluated nuclear data files,
recommend evaluations of PFNS with covariances from thermal to 20 MeV of incident neutron energy.

ACTIVITIES and REPORTS

DURATION: 2010-2014; CRP CODE: F4.10.26

PARTICIPANTS: Stephan Oberstedt (EC-JRC-IRMM), Vladimir Maslov (Belorrusia), Takaaki Ohsawa (Japan), Nengchuan Shu (China), Patrick Talou (USA), Benjamin Morillon (France), Anabella C. Tudora (Romania), Nikolai Kornilov (USA), Gennady Manturov (Russia), Aloks Saxena (India), Alexander S. Vorobyev (Russia), Ivan Kodeli (Slovenia), Denise Neudecker (USA), Olivier Serot (France), Ramona Vogt (USA), and Karl-Heinz Schmidt (Germany).

IAEA PROJECT OFFICER: R. Capote