Evaluation of the Effect of Thermal Stratification on the Residual Life of the Surge Line of the Pressure Compensator in the No. 5 Unit of the Novovoronezh NPP.
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| Title: | Evaluation of the Effect of Thermal Stratification on the Residual Life of the Surge Line of the Pressure Compensator in the No. 5 Unit of the Novovoronezh NPP. |
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| Authors: | Povarov, V.1 |
| Source: | Atomic Energy. May2016, Vol. 120 Issue 1, p22-28. 7p. |
| Subjects: | Pressure measurement instruments, Novovoronezhskaia atomnaia ėlektrostantsiia imeni 50-letiia SSSR (Russia), Nuclear reactor cooling, Coolants, Thermal stresses |
| Abstract: | This article is concerned with investigations of temperature stratification of the first-loop coolant in the surge line of the pressure compensator in the No. 5 unit of the Novovoronezh NPP. The actual stress-strain state and accumulated structural damage in the surge line in different operating regimes was analyzed by means of multiparametric computational and experimental monitoring. The experimental data demonstrate thermal stratification, giving rise to a temperature differential over the cross section ranging from 30°C under normal operating conditions to 150°C, as a result of disruption of the normal operating conditions, and high thermal stresses. The analysis shows that the cyclic strength of the weld connection of the surge line can be exhausted by the end of the 60-yr life of the No. 5 unit. It is concluded that the actual residual stresses must be measured and calculations of the cyclic strength and the residual life of the surge line must be performed. It is suggested that a technology be developed to strengthen the weld-joint metal in order to reduce the formation of operational surface defects. [ABSTRACT FROM AUTHOR] |
| Copyright of Atomic Energy 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.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 115376145 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Evaluation of the Effect of Thermal Stratification on the Residual Life of the Surge Line of the Pressure Compensator in the No. 5 Unit of the Novovoronezh NPP. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Povarov%2C+V%2E%22">Povarov, V.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Atomic+Energy%22">Atomic Energy</searchLink>. May2016, Vol. 120 Issue 1, p22-28. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Pressure+measurement+instruments%22">Pressure measurement instruments</searchLink><br /><searchLink fieldCode="DE" term="%22Novovoronezhskaia+atomnaia+ėlektrostantsiia+imeni+50-letiia+SSSR+%28Russia%29%22">Novovoronezhskaia atomnaia ėlektrostantsiia imeni 50-letiia SSSR (Russia)</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+reactor+cooling%22">Nuclear reactor cooling</searchLink><br /><searchLink fieldCode="DE" term="%22Coolants%22">Coolants</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stresses%22">Thermal stresses</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This article is concerned with investigations of temperature stratification of the first-loop coolant in the surge line of the pressure compensator in the No. 5 unit of the Novovoronezh NPP. The actual stress-strain state and accumulated structural damage in the surge line in different operating regimes was analyzed by means of multiparametric computational and experimental monitoring. The experimental data demonstrate thermal stratification, giving rise to a temperature differential over the cross section ranging from 30°C under normal operating conditions to 150°C, as a result of disruption of the normal operating conditions, and high thermal stresses. The analysis shows that the cyclic strength of the weld connection of the surge line can be exhausted by the end of the 60-yr life of the No. 5 unit. It is concluded that the actual residual stresses must be measured and calculations of the cyclic strength and the residual life of the surge line must be performed. It is suggested that a technology be developed to strengthen the weld-joint metal in order to reduce the formation of operational surface defects. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Atomic Energy 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: 10.1007/s10512-016-0090-2 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 22 Subjects: – SubjectFull: Pressure measurement instruments Type: general – SubjectFull: Novovoronezhskaia atomnaia ėlektrostantsiia imeni 50-letiia SSSR (Russia) Type: general – SubjectFull: Nuclear reactor cooling Type: general – SubjectFull: Coolants Type: general – SubjectFull: Thermal stresses Type: general Titles: – TitleFull: Evaluation of the Effect of Thermal Stratification on the Residual Life of the Surge Line of the Pressure Compensator in the No. 5 Unit of the Novovoronezh NPP. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Povarov, V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2016 Type: published Y: 2016 Identifiers: – Type: issn-print Value: 10634258 Numbering: – Type: volume Value: 120 – Type: issue Value: 1 Titles: – TitleFull: Atomic Energy Type: main |
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