Progress in implementation of the neutronics model of hextran into APROS

Jukka Rintala

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


A new three-dimensional nodal model for neutronics calculation is currently under implementation into APROS - Advanced PROcess Simulation environment - to conform the increasing accuracy requirements. The new model is based on an advanced nodal code HEXTRAN and its static version HEXBU-3D by VTT, Technical Research Centre of Finland. However, several improvements for the model are made and the whole model has been reprogrammed. They don't change the theory basement of the method, but rather makes the implementation more flexible. Currently the computational part of the program is ready and current work concentrates on testing and validation. User interface details and usability issues need also work in the future. In this paper, general information about the improvements of the theory is explained first. Then the latest validation results are given. Currently the dynamical characteristics are tested by calculating the AER's kinetic benchmarks for VVER-440 reactors. In this paper, the results for the first benchmark are shown for two version of the code. The first version is fully HEXTRAN-comparable code to test that the basic structure works as wanted. The second version is the actual improved model for APROS.
Original languageEnglish
Title of host publication19th atomic energy research symposium on WWER reactor physics and reactor safety
PublisherAtomic Energy Research AER
ISBN (Print)978-963-372-640-2, 978-963-372-641-9
Publication statusPublished - 2009
MoE publication typeA4 Article in a conference publication
Event19th AER Symposium on VVER Reactor Physics and Reactor Safety - Varna, Bulgaria
Duration: 21 Sept 200925 Sept 2009


Conference19th AER Symposium on VVER Reactor Physics and Reactor Safety


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