Remarks on boiling water reactor stability analysis – part 2: stability monitoring
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C. Lange
Abstract
In part 1 of this article we explained the partly relative complex solution manifold of the differential equations describing the stability behaviour of a BWR, in particular the coexistence of different types of solutions, such as the coexistence of unstable limit cycles and stable fixed points are of interest from the operational safety point of view. The part 2 is devoted to the surveillance of the stability behaviour. We summarize some stability monitoring methods and suggest to support stability tests by RAM-ROM analyses in order to reveal in advance the stability “landscape” of the BWR in a parameter region high sensitive for appearing of linear unstable states. The analysis of an especial stability test, performed at NPP Leibstadt (KKL), makes it clear that the measurement results can only be interpreted by application of bifurcation analysis.
Kurzfassung
Im Teil 1 des Artikels wurde erläutert, dass die Lösungsmannigfaltigkeit der Differentialgleichungen, die das SWR-Stabilitätsverhalten beschreiben, teilweise relativ komplex sein kann. Speziell Multi-Stabilitätszustände, in denen mehrere Stabilitätszustände koexistieren, wie z.B. die Koexistenz von stabilen Fixpunkten und instabilen Grenzzyklen, sind aus der Sicht der Betriebssicherheit von Interesse. Der Teil 2 ist der Überwachung des Stabilitätsverhaltens gewidmet. Es werden einige Überwachungsmethoden kurz erläutert und wir schlagen vor, einen Stabilitätstest mit RAM-ROM-Analysen zu begleiten, um im Voraus die „Stabilitätslandschaft“ des SWR in Parameterbereichen zu ermitteln, in denen das System hoch empfindlich ist für das Auftreten von (linear) instabilen Zuständen. Die Analyse eines speziellen Stabilitätstestes, durchgeführt im KKL, macht deutlich, dass diese Messergebnisse nur mit Hilfe der Bifurkationsanalyse interpretiert werden können.
References
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© 2012, Carl Hanser Verlag, München
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Technical Contributions/Fachbeiträge
- Remarks on boiling water reactor stability analysis – part 2: stability monitoring
- Irradiation tests on PHWR type fuel elements in TRIGA research reactor of INR Pitesti
- Heat transfer study of a submerged reactor channel under boil-off condition
- Dynamic assessment for life extension of nuclear power plants (NPPs) using system dynamics (SD) method
- Effect of using FLiBe and FLiNaBe molten salts bearing plutonium fluorides on the neutronic performance of PACER
- Evaluations of the CCFL and critical flow models in TRACE for PWR LBLOCA analysis
- Development of program DETSIM to simulate detector's full energy peak efficiency
- The criticality calculations for one-speed neutrons in a reflected slab with anisotropic scattering using the modified UN method
- A detailed investigation of interactions within the shielding to HPGe detector response using MCNP code
- Cosmic ray angular distribution employing plastic scintillation detectors and flash-ADC/FPGA-based readout systems
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Technical Contributions/Fachbeiträge
- Remarks on boiling water reactor stability analysis – part 2: stability monitoring
- Irradiation tests on PHWR type fuel elements in TRIGA research reactor of INR Pitesti
- Heat transfer study of a submerged reactor channel under boil-off condition
- Dynamic assessment for life extension of nuclear power plants (NPPs) using system dynamics (SD) method
- Effect of using FLiBe and FLiNaBe molten salts bearing plutonium fluorides on the neutronic performance of PACER
- Evaluations of the CCFL and critical flow models in TRACE for PWR LBLOCA analysis
- Development of program DETSIM to simulate detector's full energy peak efficiency
- The criticality calculations for one-speed neutrons in a reflected slab with anisotropic scattering using the modified UN method
- A detailed investigation of interactions within the shielding to HPGe detector response using MCNP code
- Cosmic ray angular distribution employing plastic scintillation detectors and flash-ADC/FPGA-based readout systems
