Comment on `Error due to nuclear data uncertainties in the prediction of large liquid-metal fast breeder reactor core performance parameters' [and reply]

Wagschal and Yeivin comment on a paper by Kamei and Yoshida (ibid., vol.84, p.83, 1983) on the use of mock-up experiments to correct calculated performance parameters of planned power reactors and the estimation of the errors in these parameters. There are two approaches, the cross-section adjustment method and the bias-factor method. It is shown that the Kamei and Yoshida method is a problematic approximation of the uncertainty matrix of the performance parameters and a method for the uncertainties is proposed. Kamei and Yoshida then reply to these comments.