Design stability and safety margins of the ETRR-2 core cooling system regarding seismic loads
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K. Ahmed
Abstract
The seismic design of a nuclear power plant includes two levels of design earthquake, the safe shutdown earthquake (SSE) and the operating basis earthquake (OBE). The OBE and SSE are considered in the nuclear power plant design as required by the IAEA safety regulations. A typical piping model for the ETRR-2 core cooling system includes ASME-class 1, 2 and 3 piping and was analyzed with regard to both IAEA safety regimes. A load combination, as stated by the IAEA Safety Guide 50-SG-S2, has been considered. The safety guide requires that the OBE should equal to at least one half SSE and that the plant should be shut down if exposed to earthquake intensity greater than the OBE. The results reflect the requirement for the precise design of a supporting system to accommodate for higher seismic peaks more than 0.2 g and the system needs to be more flexible.
Kurzfassung
Bei der seismischen Auslegung eines Kernkraftwerks werden zwei Erdbebenfälle betrachtet: das Sicherheitserdbeben (SSE) und das Betriebserdbeben (OBE). Die Einbeziehung von SSE und OBE ist bei der Auslegung von Kernkraftwerken nach den IAEA Sicherheitsvorschriften erforderlich. Ein typsiches Rohrleitungsmodell für das ETRR-2 Kühlsystem enthält Rohrleitungen nach ASME-Klassen 1, 2 und 3 und wurde im Hinblick auf die beiden IAEA Erdbebenfälle analysiert. Eine Kombination von Belastungen wurde gemäß IAEA Safety Guide 50-SG-S2 berücksichtigt. Der Saftey Guide schreibt vor, dass der OBE-Wert die Hältes des SSE-Wertes betragen sollte und dass die Anlage bei einer Erdbebenintensität größer als der OBE-Wert abgeschaltet werden soll. Die Ergebnisse bestätigen die Forderung nach einer entsprechenden Auslegung eines erdbebensicheren Systems, das Belastungen von mehr als 0,2 g aufnehmen kann und elastisch gestaltet sein sollte.
References
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© 2005, Carl Hanser Verlag, München
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries/Kurzfassungen
- Technical Contributions/Fachbeiträge
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- Phenomenological model for non-equilibrium deuteron emission in nucleon induced reactions
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- Simulation of the hydrogen distribution in the confinement of the Ignalina nuclear power plant
- Neutronic calculations for the new fuel configuration of the ETRR-1 research reactor
- Design stability and safety margins of the ETRR-2 core cooling system regarding seismic loads
- Thermal-hydraulic assessment of topaz irradiation processes at the ETRR-2 research reactor
- The HN method for slab albedo problem for linearly anisotropic scattering
- On the plane-wave theory in fertile uranium
- Safety and security of radioactive sources – international provisions
- The singular eigenfunction method: the critical slab problem for linearly anisotropic scattering
- Technical Notes/Technische Mitteilungen
- Results of in vitro intercomparison tests of the Coordinating Office on Incorporation Monitoring in Germany
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries/Kurzfassungen
- Technical Contributions/Fachbeiträge
- Integrated management systems in the nuclear field
- Phenomenological model for non-equilibrium deuteron emission in nucleon induced reactions
- Best estimate analysis of group distribution header blockage events in RBMK-1500 reactors
- Simulation of the hydrogen distribution in the confinement of the Ignalina nuclear power plant
- Neutronic calculations for the new fuel configuration of the ETRR-1 research reactor
- Design stability and safety margins of the ETRR-2 core cooling system regarding seismic loads
- Thermal-hydraulic assessment of topaz irradiation processes at the ETRR-2 research reactor
- The HN method for slab albedo problem for linearly anisotropic scattering
- On the plane-wave theory in fertile uranium
- Safety and security of radioactive sources – international provisions
- The singular eigenfunction method: the critical slab problem for linearly anisotropic scattering
- Technical Notes/Technische Mitteilungen
- Results of in vitro intercomparison tests of the Coordinating Office on Incorporation Monitoring in Germany
