TRACE assessment of density wave instability onset with void reactivity feedback under natural circulation
Density wave oscillation (DWO) is an important safety concern for boiling water reactors (BWR) due to their high void fraction in the core. Power extensions to existing reactors such as the Maximum Extended Load Line Limit Analysis Plus (MELLLA+) lead to increase susceptibility of DWO-type instabili...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Nuclear Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573324004431 |
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| author | Paul Hurley Yang Liu Tomasz Kozlowski Juliana P. Duarte |
| author_facet | Paul Hurley Yang Liu Tomasz Kozlowski Juliana P. Duarte |
| author_sort | Paul Hurley |
| collection | DOAJ |
| description | Density wave oscillation (DWO) is an important safety concern for boiling water reactors (BWR) due to their high void fraction in the core. Power extensions to existing reactors such as the Maximum Extended Load Line Limit Analysis Plus (MELLLA+) lead to increase susceptibility of DWO-type instability following an anticipated transient without scram (ATWS). Experiments performed at the Karlstein Thermal Hydraulic Test Facility (KATHY) have reproduced the reactivity feedback mechanism in BWRs under ATWS conditions. Using a neutronics module simulator, the KATHY facility was able to provide data on the effect of different neutronic parameters on DWO onset. This paper serves to assess the capability of the thermal-hydraulics code TRACE V5P7 for simulating DWO onset and development under natural circulation with neutronic feedback. A model of the KATHY natural circulation facility is created in TRACE and a reactivity feedback mechanism is implemented using a manual control scheme to simulate the parametric effects provided by the tests. This comparison allows for an assessment of the TRACE code as well as a better understanding of the instability mechanisms and behavior under the given conditions. |
| format | Article |
| id | doaj-art-2d366c47cae244ffbb8686a5434db71c |
| institution | Kabale University |
| issn | 1738-5733 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj-art-2d366c47cae244ffbb8686a5434db71c2025-01-31T05:11:05ZengElsevierNuclear Engineering and Technology1738-57332025-02-01572103195TRACE assessment of density wave instability onset with void reactivity feedback under natural circulationPaul Hurley0Yang Liu1Tomasz Kozlowski2Juliana P. Duarte3Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, USADepartment of Mechanical Engineering, Virginia Tech, Blacksburg, VA, USADepartment of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USADepartment of Nuclear Engineering and Engineering Physics, University of Wisconsin-Madison, Madison, WI, USA; Corresponding author.Density wave oscillation (DWO) is an important safety concern for boiling water reactors (BWR) due to their high void fraction in the core. Power extensions to existing reactors such as the Maximum Extended Load Line Limit Analysis Plus (MELLLA+) lead to increase susceptibility of DWO-type instability following an anticipated transient without scram (ATWS). Experiments performed at the Karlstein Thermal Hydraulic Test Facility (KATHY) have reproduced the reactivity feedback mechanism in BWRs under ATWS conditions. Using a neutronics module simulator, the KATHY facility was able to provide data on the effect of different neutronic parameters on DWO onset. This paper serves to assess the capability of the thermal-hydraulics code TRACE V5P7 for simulating DWO onset and development under natural circulation with neutronic feedback. A model of the KATHY natural circulation facility is created in TRACE and a reactivity feedback mechanism is implemented using a manual control scheme to simulate the parametric effects provided by the tests. This comparison allows for an assessment of the TRACE code as well as a better understanding of the instability mechanisms and behavior under the given conditions.http://www.sciencedirect.com/science/article/pii/S1738573324004431Density wave oscillationTRACEPoint-kineticsVoid reactivity |
| spellingShingle | Paul Hurley Yang Liu Tomasz Kozlowski Juliana P. Duarte TRACE assessment of density wave instability onset with void reactivity feedback under natural circulation Nuclear Engineering and Technology Density wave oscillation TRACE Point-kinetics Void reactivity |
| title | TRACE assessment of density wave instability onset with void reactivity feedback under natural circulation |
| title_full | TRACE assessment of density wave instability onset with void reactivity feedback under natural circulation |
| title_fullStr | TRACE assessment of density wave instability onset with void reactivity feedback under natural circulation |
| title_full_unstemmed | TRACE assessment of density wave instability onset with void reactivity feedback under natural circulation |
| title_short | TRACE assessment of density wave instability onset with void reactivity feedback under natural circulation |
| title_sort | trace assessment of density wave instability onset with void reactivity feedback under natural circulation |
| topic | Density wave oscillation TRACE Point-kinetics Void reactivity |
| url | http://www.sciencedirect.com/science/article/pii/S1738573324004431 |
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