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Uncertainty quantification works relevant to fission yields and decay data

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In the present paper, firstly, we review our previous works on uncertainty quantification (UQ) of reactor physics parameters. This consists of (1) development of numerical tools based on the depletion perturbation theory (DPT), (2) linearity of reactor physics parameters to nuclear data, (3) UQ of decay heat and its reduction, and (4) correlation between decay heat and b-delayed neutrons emission. | Uncertainty quantification works relevant to fission yields and decay data EPJ Nuclear Sci. Technol. 4 43 2018 Nuclear Sciences G. Chiba and S. Nihira published by EDP Sciences 2018 amp Technologies https doi.org 10.1051 epjn 2018022 Available online at https www.epj-n.org REGULAR ARTICLE Uncertainty quantification works relevant to fission yields and decay data Go Chiba and Shunsuke Nihira Hokkaido University Kita 13 Nishi 8 Kita-ku Sapporo 060-8628 Japan Received 29 September 2017 Received in final form 21 January 2018 Accepted 14 May 2018 Abstract. In the present paper firstly we review our previous works on uncertainty quantification UQ of reactor physics parameters. This consists of 1 development of numerical tools based on the depletion perturbation theory DPT 2 linearity of reactor physics parameters to nuclear data 3 UQ of decay heat and its reduction and 4 correlation between decay heat and b-delayed neutrons emission. Secondly we show results of extensive calculations about UQ on decay heat with several different numerical conditions by the DPT- based capability of a reactor physics code system CBZ. 1 Introduction 2.1 Development of numerical tools based on DPT The adjoint-based procedure requires sensitivity profiles of Generally there are two numerical procedures for uncertain- reactor physics parameters with respect to nuclear data ty quantification UQ of reactor physics parameters and these can be efficiently calculated by the perturbation induced by nuclear data uncertainty the adjoint-based or generalized perturbation theory. If reactor physics procedure and the stochastic-based procedure. In recent parameters are quantities obtained from nuclides depletion years the stochastic-based procedure has been adopted problems DPT is generally utilized. DPT has been well frequently by virtue of drastic advancements of computer established in the past 1 2 but there are no computer resources but the adjoint-based procedure is still powerful codes which implement .