EPJ Web Conf.
Volume 247, 2021PHYSOR2020 – International Conference on Physics of Reactors: Transition to a Scalable Nuclear Future
|Number of page(s)||10|
|Section||Advanced Modelling and Simulation|
|Published online||22 February 2021|
APPLICATION OF THE JSIR2S CODE PACKAGE FOR SHUTDOWN DOSE RATE CALCULATIONS ON JET
1 Reactor Physics division F8, ”Jožef Stefan” Institute Jamova cesta 39, 1000 Ljubljana, Slovenia
2 FSN-FUSTEC-TEN, ENEA Frascati Research Center, Via Enrico Fermi, 45, 00044 Frascati RM, Italy
3 Faculty of Mathematics and Physics, University of Ljubljana Jadranska cesta 19, 1000 Ljubljana, Slovenia
Published online: 22 February 2021
In this paper we present a computational exercise for shut-down dose rate calculations for the JET tokamak using the in-house developed JSIR2S code package as part of its validation. The computation is performed in two parts: neutron transport and transport of secondary gamma radiation. In order to calculate neutron activation reaction rates with sufficiently low variance, hybrid variance reduction techniques using the ADVANTG code have been utilized. Probability based sampling of secondary source particles was performed. Calculated gamma dose rates after shut down are compared with dose rate measurements performed on site using ionization chambers. The C/E agreement for 1st octant is between 0.8 to 1 while statistically meaningfull results for the 2nd octant are yet to be obtained.
Key words: Fusion / JET / R2S / shutdown dose rate / gamma / ICRP74 / ADVANTG
© The Authors, published by EDP Sciences, 2021
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