0 : Reactivity ratios obtained for the three cases listed in table 3 via the proposed approach of this work. As specified in the text, two sets of errors are provided for each reactivity ratio. Firstly, for the Gaussian case only a single limit is provided due to the symmetry of the distribution σ Gauss (r i ). Secondly, the errors are given as the 68.3% contours assuming a Gaussian posterior distribution and taking its exact shape into account. Hereby, a lower and an upper error, σ -and σ + , are provided respectively for each reactivity ratio. Any σ in this table corresponds to the boundary of the one-dimensional interval which contains 68.3% probability of the one-dimensional marginal posterior distribution. For more information on this we refer to appendix A.