Improving fission-product decay data for reactor applications: part I—decay heat
Alan L. Nichols, P. Dimitriou, A. Algora, M. Fallot, L. Giot, F.G. Kondev, T. Yoshida, M. Karny, G. Mukherjee, B. C. Rasco, K. P. Rykaczewski, A. A. Sonzogni, J. L. Taı́n
Abstract
Abstract Effort has been expended to assess the relative merits of undertaking further decay-data measurements of the main fission-product contributors to the decay heat of neutron-irradiated fissionable fuel and related actinides by means of Total Absorption Gamma-ray Spectroscopy (TAGS - sometimes abbreviated to TAS) and Discrete Gamma-ray Spectroscopy (DGS). This review has been carried out following similar work performed under the auspices of OECD/WPEC-Subgroup 25 (2005–2007) and the International Atomic Energy Agency (2009, 2014), and various highly relevant TAGS measurements completed as a consequence of such assessments. We present our recommendations for new decay-data evaluations, along with possible requirements for total absorption and discrete high-resolution gamma-ray spectroscopy studies that cover approximately 120 fission products and various isomeric states.