Accelerator-Based Nuclear Data Measurements for Nuclear Science and Technology

摘要

Accelerator-development and new experimental techniques at accelerator-based neutron sources are at the heart of improvements of nuclear data for science and technology. An important driver is the new interest for safety estimates based on full uncertainty propagation as opposed to the exclusive use of safety margins based on expert judgment. Large scale modeling facilitated by the massive growth of computing power emphasize the importance of nuclear data uncertainties which are often the main contributor to performance uncertainty. Advanced reactor development with its emphasis on resource economy, minimization of high-level waste and improved safety is another important driver. Accelerator driven systems may prove essential new systems for closing the fuel cycle. Global security, emergency preparedness and safeguards change the focus towards fission and neutron- and gamma-induced yields that help forensics and detecting illegal activities The challenges for nuclear data lie in the systematic provision of uncertainties and covariances, the substantial improvement of well-known key quantities such as those addressed in the CIELO initiative (Collaborative International Evaluated Library Organisation) and addressing some of the elusive nuclear data for minor actinides which are essential in addressing the high-level waste issues. In the field of fission measurements spectacular new techniques provide a wealth of data that opening new avenues. An overview of recent developments is presented from leading facilities around the world with a short outlook of where these developments may take us.