Multipoint Kinetics Model with Power Reactivity Effect for the Axial Offset Control in the VVER-1200 Nuclear Reactor in the Load-Following Mode.
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| Title: | Multipoint Kinetics Model with Power Reactivity Effect for the Axial Offset Control in the VVER-1200 Nuclear Reactor in the Load-Following Mode. |
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| Authors: | Pravosud, S. S.1,2 (AUTHOR) ssepravosud@mephi.ru, Yakubov, Ya. O.2 (AUTHOR), Susakin, V. A.2 (AUTHOR) |
| Source: | Physics of Atomic Nuclei. Dec2024, Vol. 87 Issue 11, p1579-1590. 12p. |
| Subjects: | Control elements (Nuclear reactors), Nuclear models, Nuclear reactor control, Delayed neutrons, Statistical accuracy |
| Abstract: | In this work, a multipoint kinetics model for a VVER-1200 nuclear reactor consisting of a diverse (two-point, four-point, six-point, eight-point, and ten-point) set of point kinetics models in the axial direction that are coupled to each other by coefficients determined in the diffusion approximation is proposed and simulated in MATLAB environment. For a more precise description of the dynamic modes of the reactor, the model is provided with power reactivity feedback determined by temperature effects of reactivity and Mann's approach to describing thermal-hydraulic processes in which it is assumed that two coolant nodes are adjacent to a single fuel node. The effect of different numbers of delayed neutron groups on the accuracy and speed of simulation of transient processes in the load-following mode is tested on the model with four axial points. In addition, a new mathematical model of control rods (CRs) is proposed that uses a combination of sign functions to sequentially influence all nodes during insertion or withdrawal. The results of numerical simulation show that the statistical accuracy of the proposed model is satisfactory, and general assumptions about transients are consistent with their physical definitions. This research contributes to the advancement of point nuclear reactor models for improving the synthesis of an automatic power controller. [ABSTRACT FROM AUTHOR] |
| Copyright of Physics of Atomic Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 183201412 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Multipoint Kinetics Model with Power Reactivity Effect for the Axial Offset Control in the VVER-1200 Nuclear Reactor in the Load-Following Mode. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Pravosud%2C+S%2E+S%2E%22">Pravosud, S. S.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> ssepravosud@mephi.ru</i><br /><searchLink fieldCode="AR" term="%22Yakubov%2C+Ya%2E+O%2E%22">Yakubov, Ya. O.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Susakin%2C+V%2E+A%2E%22">Susakin, V. A.</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Physics+of+Atomic+Nuclei%22">Physics of Atomic Nuclei</searchLink>. Dec2024, Vol. 87 Issue 11, p1579-1590. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Control+elements+%28Nuclear+reactors%29%22">Control elements (Nuclear reactors)</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+models%22">Nuclear models</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+reactor+control%22">Nuclear reactor control</searchLink><br /><searchLink fieldCode="DE" term="%22Delayed+neutrons%22">Delayed neutrons</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+accuracy%22">Statistical accuracy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this work, a multipoint kinetics model for a VVER-1200 nuclear reactor consisting of a diverse (two-point, four-point, six-point, eight-point, and ten-point) set of point kinetics models in the axial direction that are coupled to each other by coefficients determined in the diffusion approximation is proposed and simulated in MATLAB environment. For a more precise description of the dynamic modes of the reactor, the model is provided with power reactivity feedback determined by temperature effects of reactivity and Mann's approach to describing thermal-hydraulic processes in which it is assumed that two coolant nodes are adjacent to a single fuel node. The effect of different numbers of delayed neutron groups on the accuracy and speed of simulation of transient processes in the load-following mode is tested on the model with four axial points. In addition, a new mathematical model of control rods (CRs) is proposed that uses a combination of sign functions to sequentially influence all nodes during insertion or withdrawal. The results of numerical simulation show that the statistical accuracy of the proposed model is satisfactory, and general assumptions about transients are consistent with their physical definitions. This research contributes to the advancement of point nuclear reactor models for improving the synthesis of an automatic power controller. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Physics of Atomic Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S1063778824100399 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 1579 Subjects: – SubjectFull: Control elements (Nuclear reactors) Type: general – SubjectFull: Nuclear models Type: general – SubjectFull: Nuclear reactor control Type: general – SubjectFull: Delayed neutrons Type: general – SubjectFull: Statistical accuracy Type: general Titles: – TitleFull: Multipoint Kinetics Model with Power Reactivity Effect for the Axial Offset Control in the VVER-1200 Nuclear Reactor in the Load-Following Mode. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Pravosud, S. S. – PersonEntity: Name: NameFull: Yakubov, Ya. O. – PersonEntity: Name: NameFull: Susakin, V. A. IsPartOfRelationships: – BibEntity: Dates: – D: 28 M: 12 Text: Dec2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 10637788 Numbering: – Type: volume Value: 87 – Type: issue Value: 11 Titles: – TitleFull: Physics of Atomic Nuclei Type: main |
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