Comparative Analysis of Neutrons Properties of Nuclear Fuel Produced by Westinghouse and Fuel Element for WWER-1000 Reactors by code SERPENT

Sondos, M. A. Abu; Demin, V. M.; Smirnov, A D

doi:10.26583/gns-2019-02-12

Cited by 4 publications

(2 citation statements)

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“…This can be interpreted as an alternative to the use of boron control (regarding pressurized water reactors) as well as to the extension of fuel or reactor campaigns. The influence on the campaign parameters was considered in (Khoshahval et al 2016, Abu Sondos et al 2019a, 2019b, 2019c, Frybortova 2019, Saad et al 2019. Research is also conducted in terms of assessing the behavior of uranium-gadolinium fuel during homogeneous mixing of elements: when gadolinium is added to the fuel, its thermal conductivity changes, affecting the design characteristics.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Burnable Absorber Arrangement on the VVER(1200 Fuel Assembly Neutronic Performance

Vnukov

Kolesov

Zhavoronkova

et al. 2021

YadEn

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Optimizing the use of fuel in a power reactor is a task of current concern. However, little attention has been given to investigating the dependences among the enrichment used, the content of gadolinium oxide in fuel elements, and the life time in combination with assessing the efficiency of using Gd fuel elements with different Gd 2 O 3 contents.The paper considers fuel assembly (FA) versions for VVER-1200 reactors having different enrichments for fuel elements, including those with Gd, and different contents of gadolinium oxide in fuel. A comparative analysis is presented for assemblies with homogeneous Gd 2 O 3 arrangements in each fuel element and with profiled Gd 2 O 3 arrangements. In the latter case, profiling depends on the neutron flux density in the layer which includes Gd fuel elements. This suggests that the arrangement of gadolinium oxide proportionally to the neutron flux density will improve the FA neutronic performance.The results were obtained using SERPENT (a continuous-energy multi-purpose three-dimensional Monte Carlo particle transport code). The assemblies with the used parameters for a 12-month fuel cycle have shown the method under consideration to be inefficient for a period of over 300 eff. days. With increased enrichment and content of gadolinium oxide, the use of profiled versions has turned out to be more rational for longer periods (up to 900 eff. days). Therefore, this phenomenon is relevant for the reactor life, whereas it proves to be insignificant for the fuel life. A complex relationship is noted between the gadolinium and uranium content in an assembly and the effective multiplication factor for the profiled and standard assemblies. This relationship requires further detailed consideration.

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Section: Introductionmentioning

confidence: 99%

Effect of the Burnable Absorber Arrangement on the VVER(1200 Fuel Assembly Neutronic Performance

Vnukov

Kolesov

Zhavoronkova

et al. 2021

YadEn

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of the burnable absorber arrangement on the VVER-1200 fuel assembly neutronic performance

Vnukov¹,

Kolesov²,

Zhavoronkova³

et al. 2021

NUCET

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Optimizing the use of fuel in a power reactor is a task of current concern. However, little attention has been given to investigating the dependences among the enrichment used, the content of gadolinium oxide in fuel elements, and the life time in combination with assessing the efficiency of using Gd fuel elements with different Gd2O3 contents. The paper considers fuel assembly (FA) versions for VVER-1200 reactors having different enrichments for fuel elements, including those with Gd, and different contents of gadolinium oxide in fuel. A comparative analysis is presented for assemblies with homogeneous Gd2O3 arrangements in each fuel element and with profiled Gd2O3 arrangements. In the latter case, profiling depends on the neutron flux density in the layer which includes Gd fuel elements. This suggests that the arrangement of gadolinium oxide proportionally to the neutron flux density will improve the FA neutronic performance. The results were obtained using SERPENT (a continuous-energy multi-purpose three-dimensional Monte Carlo particle transport code). The assemblies with the used parameters for a 12-month fuel cycle have shown the method under consideration to be inefficient for a period of over 300 eff. days. With increased enrichment and content of gadolinium oxide, the use of profiled versions has turned out to be more rational for longer periods (up to 900 eff. days). Therefore, this phenomenon is relevant for the reactor life, whereas it proves to be insignificant for the fuel life. A complex relationship is noted between the gadolinium and uranium content in an assembly and the effective multiplication factor for the profiled and standard assemblies. This relationship requires further detailed consideration.

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Effect of gadolinium absorber radial profiling in fuel pins on VVER-1000 assembly neutron-physical characteristics

Vnukov

Zhavoronkova

Kolesov

et al. 2020

J. Phys.: Conf. Ser.

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The paper raises the problem of non-optimal use of resources. The purpose is to extend the fuel campaign. An alternative task is to increase the duration of the reactor campaign to increase the flexibility of decision-making during the operation of a nuclear reactor. The paper presents calculations of the profiling of a burnable absorber in fuel assemblies for VVER-1000 reactors. A quantitative assessment of the effect of alternative placement of gadolinium in fuel elements is made. Changes in the burnup of fuel elements in fuel assemblies are noted, as well as an advantage expressed in a change in the kinf. The results showed a strong dependence of the isotopic composition of the peripheral layer on the neutron flux density and a weak dependence of the isotopic composition of the central fuel element with gadolinium layers on the neutron flux density. The burnup when using the iterative process turned out to be impossible to align along the radius presumably due to the production of plutonium. A significant advantage of profiling a fuel cell with gadolinium is expressed in the period before the first overload, with each subsequent overload the efficiency of the technology decreases. However, kinf of the profiled assembly throughout the entire fuel campaign exceeds the kinf of the standard assembly, which indicates the efficient use of a burnable absorber.

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Comparative Analysis of Neutrons Properties of Nuclear Fuel Produced by Westinghouse and Fuel Element for WWER-1000 Reactors by code SERPENT

Cited by 4 publications

References 0 publications

Effect of the Burnable Absorber Arrangement on the VVER(1200 Fuel Assembly Neutronic Performance

Effect of the Burnable Absorber Arrangement on the VVER(1200 Fuel Assembly Neutronic Performance

Effect of the burnable absorber arrangement on the VVER-1200 fuel assembly neutronic performance

Effect of gadolinium absorber radial profiling in fuel pins on VVER-1000 assembly neutron-physical characteristics

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