Exakta fissionsutbyten för framtida nukleära energisystem

Tidsperiod: 2019-12-01 till 2022-12-31

Projektledare: Ali Al-adili

Finansiär: Vetenskapsrådet

Bidragstyp: Bidrag för anställning eller stipendier

Budget: 3 200 000 SEK

The nuclear data needs for Gen-IV systems are eminent. In order to ensure a safe and efficient reactor operation, fast-neutron induced data are needed. Fissions Yields (FY) are a major source of uncertainties in decay heat- and burnup calculations. They are vital for delayed neutron calculations, reactor poisoning and waste management. The aim of this project is to improve the current knowledge of fast neutron induced fission yields. By delivering accurate FYs and prompt neutron multiplicities (nubar) we contribute to fission modeling and improve the nuclear data evaluation files (ENDF).The methodology utilizes the state-of-the-art spectrometer VERDI via the “2v-2E” method. Precise FY determination can be achieved with a mass resolution better than 2 u. The method provides another important observable, namely the average prompt neutron multiplicity.The goal of this project is to finalize the development of VERDI and to perform systematic measurements of FY and neutron emission as a function of neutron energy. First, the induced fission of 235U will be measured, both in thermal and fast neutron fission, as a proof of principle. Thereafter, the focus will be on the reactions 238U(n,f) and 232Th(n,f), since they are suitable isotopes for Gen-IV nuclear fuels. This work is performed in a strong international collaboration; together with the EC-JRC of the in Geel, Belgium. On the national side, the project is part of the Swedish Academic Initiative in Nuclear Technology, SAINT.