open access

https://hdl.handle.net/2115/87547

Enhancement of applicability of high-efficiency random sampling method using control variates method and sensitivity coefficients

英語

control variates method

2022-07

Taylor & Francis

Journal of nuclear science and technology

59(7)

866-874

The CV-S method is a high-efficiency random sampling method to estimate statistical moments of random variables, and it uses an approximated target parameter which are linearly dependent on input as a mockup parameter. In order to enhance the applicability of the CV-S method, we propose to use a mockup parameter which is different from but similar to a target parameter and whose sensitivity coefficients are available. In the present work, nuclear fuel burnup problems are concerned, and standard deviation of k infinity and nuclide number densities at certain fuel burnup are estimated by the CV-S method. Through numerical tests, it is clearly demonstrated that even if sensitivity coefficients of non burnup-related parameters in a simple system like a fuel pin-cell are used as the mockup, the CV-S method has a potential to efficiently estimate statistical moments of burnup-related parameters in a complicated system like a fuel assembly.

学術雑誌論文

Accepted Manuscript

This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Nuclear Science and Technology on 22 Dec 2021, available online: http://www.tandfonline.com/10.1080/00223131.2021.2015473.

0022-3131