Comparative analysis of simulations of LIVE-L10 and -L11 experiments using different lower head modules of AC2
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F. Krist
Abstract
The stabilization of molten core material in the lower head in case of a severe accident by external cooling of the reactor vessel is regarded as an effective severe accident management measure. In the experiments LIVE-L10 and -L11 the late phase melt pool behaviour of the corium is investigated under different cooling conditions – the former under sub-cooled convection, the latter under nucleate boiling conditions. In this work the experiments are calculated with the severe accident analysis code AC2 – ATHLET-CD 3.1A. Objective of the simulations conducted is the analysis and assessment of the code's capability to simulate the most relevant phenomena that occur during the tests. The simulations are performed with two different lower head modules implemented in ATHLET-CD, AIDA (Analysis of the Interaction between Core Debris and the reactor pressure vessel during severe Accidents) and LHEAD (extended Lower Head module). The simulation results, analysed in comparison with the experimental results, show the capability of both modules to reproduce the respective experiments.
Kurzfassung
Bei einem schweren Unfall gilt die Stabilisierung von geschmolzenem Kernmaterial im unteren Plenum durch die externe Kühlung des Reaktordruckbehälters als wirksame Maßnahme zur Mitigation solcher Unfälle. Im Rahmen der Experimente LIVE-L10 und -L11 wird das Schmelzeverhalten unter verschiedenen Kühlbedingungen untersucht – L10 unter konvektiver Kühlung, L11 unter Blasensieden. In dieser Arbeit werden die Experimente mithilfe des Störfallanalysecodes AC2 – ATHLET-CD 3.1A simuliert. Ziel der durchgeführten Simulationen ist die Analyse und Einschätzung der Leistungsfähigkeit des Codes bezüglich der Abbildung der relevanten experimentellen Phänomene. Die Simulationen werden mit zwei verschiedenen in ATHLET-CD implementierten Modulen zur Beschreibung des unteren Plenums durchgeführt, AIDA und LHEAD. Die Simulationsergebnisse zeigen, in Gegenüberstellung mit den experimentellen Messdaten, dass die jeweiligen Experimente sowohl mit AIDA als auch mit LHEAD abgebildet werden können.
References
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© 2019, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Editorial
- GRS Code System AC2
- Technical Contributions/Fachbeiträge
- Development of AC2 for the simulation of advanced reactor design of Generation 3/3+ and light water cooled SMRs
- Thermal-hydraulic insights during a main steam line break in a generic PWR KONVOI reactor with ATHLET 3.1A
- Heat transfer to water near the critical point: evaluation of the ATHLET thermal-hydraulic system code
- ATHLET extensions for the simulation of supercritical carbon dioxide driven power cycles
- Validation of the AC2 Codes ATHLET and ATHLET-CD
- Comparative analysis of simulations of LIVE-L10 and -L11 experiments using different lower head modules of AC2
- Validation and Application of the AC2 Code COCOSYS
- Validation of COCOSYS 2.4v4 AIM module on various single effect and integral experiments
- Simulation of LOCA-typical containment conditions with COCOSYS on the basis of THAI-test TH-29.3
- Analysis of the melt spreading and MCCI during the ex-vessel phase of a severe accident in WWER-1000
- Technical Notes/Technische Mitteilungen
- New developments in the thermal hydraulic module THY of the COCOSYS program, part of the AC2 software package: turbulence in gaseous countercurrent flows
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Editorial
- GRS Code System AC2
- Technical Contributions/Fachbeiträge
- Development of AC2 for the simulation of advanced reactor design of Generation 3/3+ and light water cooled SMRs
- Thermal-hydraulic insights during a main steam line break in a generic PWR KONVOI reactor with ATHLET 3.1A
- Heat transfer to water near the critical point: evaluation of the ATHLET thermal-hydraulic system code
- ATHLET extensions for the simulation of supercritical carbon dioxide driven power cycles
- Validation of the AC2 Codes ATHLET and ATHLET-CD
- Comparative analysis of simulations of LIVE-L10 and -L11 experiments using different lower head modules of AC2
- Validation and Application of the AC2 Code COCOSYS
- Validation of COCOSYS 2.4v4 AIM module on various single effect and integral experiments
- Simulation of LOCA-typical containment conditions with COCOSYS on the basis of THAI-test TH-29.3
- Analysis of the melt spreading and MCCI during the ex-vessel phase of a severe accident in WWER-1000
- Technical Notes/Technische Mitteilungen
- New developments in the thermal hydraulic module THY of the COCOSYS program, part of the AC2 software package: turbulence in gaseous countercurrent flows
