{"title":"VVER-1000和-1200反应堆功率密度轴向氙振荡的在线收敛预报","authors":"V. R. Kripak, G. A. Tiunov, P. E. Filimonov","doi":"10.1007/s10512-025-01189-w","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><p>Transient xenon processes in the core of VVER-1000 and -1200 water-water power reactors can lead to the occurrence of axial power oscillations. Online forecast of oscillation convergence represents an urgent and currently unresolved task of nuclear power plant operation.</p><h3>Aim</h3><p>To develop and theoretically justify an improved method for the online forecast of xenon oscillations.</p><h3>Materials and methods</h3><p>The data from experiments conducted at the Novovoronezh NPP power unit and computational simulation using the modified Imitator Reaktora software were used.</p><h3>Results and discussion</h3><p>The developed method forecasts axial oscillations with an error of no more than 18%. In addition to the acceptable level of deviations, the reliability of the online forecast is significantly increased by taking into account damping of axial oscillations. The analytical and computational justification of the method is presented; results of comparison between the forecast with experimental data are provided.</p><h3>Conclusion</h3><p>An improved method for the online forecast of oscillations taking into account convergence is integrated into the Imitator Reaktora software for use at nuclear power plants.</p></div>","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":"137 3-4","pages":"154 - 160"},"PeriodicalIF":0.3000,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Online convergence forecast for axial xenon oscillations of the power density in VVER-1000 and -1200 reactors\",\"authors\":\"V. R. Kripak, G. A. Tiunov, P. E. Filimonov\",\"doi\":\"10.1007/s10512-025-01189-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Background</h3><p>Transient xenon processes in the core of VVER-1000 and -1200 water-water power reactors can lead to the occurrence of axial power oscillations. Online forecast of oscillation convergence represents an urgent and currently unresolved task of nuclear power plant operation.</p><h3>Aim</h3><p>To develop and theoretically justify an improved method for the online forecast of xenon oscillations.</p><h3>Materials and methods</h3><p>The data from experiments conducted at the Novovoronezh NPP power unit and computational simulation using the modified Imitator Reaktora software were used.</p><h3>Results and discussion</h3><p>The developed method forecasts axial oscillations with an error of no more than 18%. In addition to the acceptable level of deviations, the reliability of the online forecast is significantly increased by taking into account damping of axial oscillations. The analytical and computational justification of the method is presented; results of comparison between the forecast with experimental data are provided.</p><h3>Conclusion</h3><p>An improved method for the online forecast of oscillations taking into account convergence is integrated into the Imitator Reaktora software for use at nuclear power plants.</p></div>\",\"PeriodicalId\":480,\"journal\":{\"name\":\"Atomic Energy\",\"volume\":\"137 3-4\",\"pages\":\"154 - 160\"},\"PeriodicalIF\":0.3000,\"publicationDate\":\"2025-04-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Atomic Energy\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10512-025-01189-w\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"NUCLEAR SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atomic Energy","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10512-025-01189-w","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Online convergence forecast for axial xenon oscillations of the power density in VVER-1000 and -1200 reactors
Background
Transient xenon processes in the core of VVER-1000 and -1200 water-water power reactors can lead to the occurrence of axial power oscillations. Online forecast of oscillation convergence represents an urgent and currently unresolved task of nuclear power plant operation.
Aim
To develop and theoretically justify an improved method for the online forecast of xenon oscillations.
Materials and methods
The data from experiments conducted at the Novovoronezh NPP power unit and computational simulation using the modified Imitator Reaktora software were used.
Results and discussion
The developed method forecasts axial oscillations with an error of no more than 18%. In addition to the acceptable level of deviations, the reliability of the online forecast is significantly increased by taking into account damping of axial oscillations. The analytical and computational justification of the method is presented; results of comparison between the forecast with experimental data are provided.
Conclusion
An improved method for the online forecast of oscillations taking into account convergence is integrated into the Imitator Reaktora software for use at nuclear power plants.
期刊介绍：
Atomic Energy publishes papers and review articles dealing with the latest developments in the peaceful uses of atomic energy. Topics include nuclear chemistry and physics, plasma physics, accelerator characteristics, reactor economics and engineering, applications of isotopes, and radiation monitoring and safety.
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