Acknowledgement
The authors are thankful to the Swedish Radiation Safety Authority (SSM) for support of the authors participation in the OECD/NEA HYMERES 1 and 2 projects. The authors are thankful for the feedback and discussions with the experts of the HYMERES-2 project and are also grateful to colleagues at the PPOOLEX facility in LUT and support from NKS (Nordic Nuclear Safety Research) for the NKS-THEOS project. The computations were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at SNIC CENTRE, KTH partially funded by the Swedish Research Council through grant agreement no.2018-05973".
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