Space-Time Correction for Reactivity Determination in Source-Driven Subcritical Systems

Kulik, Viktoriya V.; Lee, John C.

doi:10.13182/nse06-a2596

Cited by 10 publications

(2 citation statements)

References 18 publications

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“…These equations account for delayed neutrons, and the symbols represent their usual physical meanings that are consistent with the definitions in literature [29].…”

Section: Neutron Balance Equationmentioning

confidence: 90%

Effect of Higher-Order Harmonics on the Steady-State Neutron Flux in Accelerator-Driven Subcritical Reactors

Xie

Wasaye

et al. 2023

International Journal of Energy Research

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Higher-order neutron fluxes (i.e., higher-order harmonics) are widely applied in perturbation theory and modal kinetics, and they are important for research on the physical characteristics of accelerator-driven subcritical reactors (ADSRs). This paper presents a computational scheme for reconstructing the neutron flux in the steady state according to the biorthogonal properties of the forward and adjoint neutron fluxes, which can be used to analyze how higher-order harmonics affect the steady-state neutron flux under λ - and prompt α -modes. Simulation results indicated that a modal synthesis method based on λ - and prompt α -modes can effectively reconstruct the steady-state neutron flux and core power in an ADSR with a power reconstruction accuracy of within 5%. The higher-order harmonics can be classified into three types according to their physical characteristics: the first type contributes significantly to the steady-state neutron flux, the second type contributes almost nothing to the steady-state neutron flux, and the third type contributes nothing to the steady-state neutron flux. The external neutron source contributes only to specific harmonic expansion orders, which are characterized by significant axial and radial symmetry for both the λ - and prompt α -modes.

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“…These equations account for delayed neutrons, and the symbols represent their usual physical meanings that are consistent with the definitions in literature [29].…”

Section: Neutron Balance Equationmentioning

confidence: 90%

Effect of Higher-Order Harmonics on the Steady-State Neutron Flux in Accelerator-Driven Subcritical Reactors

Xie

Wasaye

et al. 2023

International Journal of Energy Research

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“…A similar methodology can also be applied to the results of the prompt decay constant method [47,195,196]. In this case, equation 7.21 is replaced by a general linear relationship between ρ and α:…”

Section: Correction Factorsmentioning

confidence: 99%

Evaluation of reactivity monitoring techniques at the Yalina – Booster subcritical facility

Palacios¹

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sionalism and hard work during the experiments, I would like to highlight their kindness in making us having a agreeable stay at Belarus. I wish to acknowledge as well the institutions that have provided nancial support for the work carried out during this PhD thesis: the EU 6th Framework program through IP-EUROTRANS Contract No. FI6W-CT2005-516520 and the ENRESA-CIEMAT agreement for the Transmutation Applied to High Level Radioactive Waste.Third, I want to thank as well all the colleagues from the Nuclear Innovation Unit and Nuclear Fission Division at CIEMAT during all these years, for all that I have learned with them and all the help they have provided at many instances, which would be endless to detail. In particular, special thanks to those that have revised the manuscript: Manuel Fernández-Ordóñez, Francisco Álvarez-Velarde and Juan Blázquez. I am also indebted to the administrative and services sta at CIEMAT for their usually invisible, albeit indispensable, assistance in many daily tasks. In particular, I would like to mention the Documentation Service for their help in nding many of the bibliographic references of this thesis.And nally, last but not least, I would like to acknowledge my family for all their support during all these years.

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Detection of subcriticality changes by Simmons-King and Sjöstrand methods

Kitamura

Misawa

2020

Annals of Nuclear Energy

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Space-Time Correction for Reactivity Determination in Source-Driven Subcritical Systems

Cited by 10 publications

References 18 publications

Effect of Higher-Order Harmonics on the Steady-State Neutron Flux in Accelerator-Driven Subcritical Reactors

Effect of Higher-Order Harmonics on the Steady-State Neutron Flux in Accelerator-Driven Subcritical Reactors

Evaluation of reactivity monitoring techniques at the Yalina – Booster subcritical facility

Detection of subcriticality changes by Simmons-King and Sjöstrand methods

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