Strategy to reveal origin of excess gamma heating observed in studies on GEN-IV reactors

Strategy to reveal origin of excess gamma heating observed in studies on GEN-IV reactors © EU, 2016

In collaboration with Swedish and French nuclear research Institutions, JRC scientists summarised the research results obtained from measurements of prompt fission γ-ray spectra and proposed a future research programme to understand better, excess γ-heating observed in nuclear power plants such as GEN-IV reactors.

In the past years, the JRC-Institute for Reference Materials and Measurements (IRMM in close collaboration with researchers from technology/” title=”View all articles about Chalmers University of Technology here”>Chalmers University of Technology and the CNRS IPN Orsay, conducted a series of experiments on prompt fission γ-ray characteristics on fissile nuclides in response to pertinent entries on the High Priority Request list of the OECD/Nuclear Energy Agency. The results meet the accuracy requirement but, indicate that the measured differences in earlier evaluations are insufficient to explain the underestimation of g heating. This is valuable feedback to the international community,  implying that the process, which was suggested to be responsible for the problem (prompt fission γ-ray emission in thermal-neutron induced fission) does not occur alone, hence the need for other reasons to be searched.

Consequently, the JRC-IRMM put forward a future research programme including systematic measurements of prompt fission γ-rays from fast-neutron induced, photon-induced and spontaneous fission.

Read more in: S. Oberstedt et al.: “Future research program on prompt γ-ray emission in nuclear fission“, Eur. Phys. J. A (2015) 51: 178, doi:10.1140/epja/i2015-15178-8