Experiments on the integral test facility “Erlanger Wanne”
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I. Ganzmann
Abstract
The facility is designed to investigate processes following a loss of coolant accident (LOCA) in the region of the reactor sump as well as downstream the sump strainers. The following parameters have been considered: The debris transport and sedimentation behavior in the reactor sump region; pressure loss caused by debris agglomeration on the sump strainer; the influence of strainer geometry and size of the strainer openings on the pressure loss; back-flushing ability of sump strainers; pressure loss caused by debris bypassing the sump strainer (downstream effect); the influence of erosion and corrosion processes on the pressure loss behavior.
The experimental studies led to the development of an accepted procedure to handle a LOCA for KWU PWR plants. For the EPR™ the efficiency of the debris retention concept in case of a LOCA was demonstrated.
Kurzfassung
Im Jahr 2003 erweiterte das AREVA NP Technical Center seine Thermohydraulik Plattform durch den Integralversuchstand „Erlanger Wanne“, um die einem Kühlmittelverluststörfall folgenden Vorgänge im Reaktorsumpf und stromab der Sumpfsiebe zu untersuchen. Folgende Parameter wurden betrachtet: Das Transport- und Sedimentationsverhalten von Isoliermaterialfragmenten im Reaktorsumpf; der durch die Anlagerung von Isoliermaterialfragmenten an den Sumpfsieben auftretende Druckverlust; der Einfluss von Siebgeometrie und Siebmaschenweite auf den Druckverlust am Sieb; die Rückspülbarkeit der Siebe; der infolge Schlupf durch die Sumpfsiebe auftretende Druckverlust an stromab liegenden Komponenten (Brennelement), der Einfluss von Korrosions- und Erosionsprozessen auf die Entwicklung des Druckverlustes.
Die Untersuchungen führten zur Entwicklung eines akzeptierten Vorgehens zur Beherrschung eines Kühlmittelverluststörfalles für DWR Reaktoren der KWU Bauart sowie zum Nachweis der Funktionsfähigkeit des Isoliermaterialfragmente- Rückhaltekonzepts des EPR™ im Falle eines LOCA.
References
1 NEA: Knowledge Base for Emergency, Core Cooling System Recirculation Reliability. NEA/CSNI/R(95)11, February 1996Suche in Google Scholar
2 Knowledge Base for the Effect of Debris on Pressurized Water Reactor Emergency Core Cooling Sump Performance. NUREG/CR-6808; LA-UR-03-0880, February 2003Suche in Google Scholar
3 Knowledge Base for Strainer Clogging – Modifications Performed in Different Countries Since 1992. NEA/CSNI/R (2002) 6Suche in Google Scholar
4 Debris impact on Emergency coolant recirculation. Workshop Albuquerque, NM, U. S. A. February 2004, Proceedings OECD 2004 NEA No. 5468Suche in Google Scholar
5 Koring, R.: Analyses and Estimation of Insulation Material Release in E.ON-PWR under Loss of Coolant Conditions, ICAPP'10, paper 10084Suche in Google Scholar
6 Kryk, H.; Hoffmann, W.; Waas, U.: Influence of Corrosion Processes on the Head Loss across ECCS Sump Strainers. Kerntechnik 201110.3139/124.110135Suche in Google Scholar
7 Ganzmann, I.; Schulte, C.: Test einer LHSI (LOW HEAD SAFETY INJECTION) Notkühlpumpe für den EPR™ bei Betrieb mit Feststoff beladenem Wasser. Jahrestagung Kerntechnik, Berlin2010Suche in Google Scholar
© 2011, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Editorial
- State of the art of controlling loss-of-coolant accidents with release of insulation material
- Technical Contributions/Fachbeiträge
- LOCAs with release of insulation material: generic aspects and international solutions
- Experiments on the integral test facility “Erlanger Wanne”
- Generic experiments at the sump model “Zittauer Strömungswanne” (ZSW) for the behaviour of mineral wool in the sump and the reactor core
- CFD analyses of fibre transport and fibre deposition at plunging jet conditions
- CFD simulation of fibre material transport in a PWR core under loss of coolant conditions
- Influence of corrosion processes on the head loss across ECCS sump strainers
- Analyses and estimation of insulation material release in E.ON-PWR under loss of coolant conditions
- Analyses of loss-of-coolant accidents involving release of insulation material under consideration of the measures taken for PWR from expert's point of view
- Evidence of having control over loss-of-coolant accidents with release of insulation material under consideration of actions taken in German BWR
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Editorial
- State of the art of controlling loss-of-coolant accidents with release of insulation material
- Technical Contributions/Fachbeiträge
- LOCAs with release of insulation material: generic aspects and international solutions
- Experiments on the integral test facility “Erlanger Wanne”
- Generic experiments at the sump model “Zittauer Strömungswanne” (ZSW) for the behaviour of mineral wool in the sump and the reactor core
- CFD analyses of fibre transport and fibre deposition at plunging jet conditions
- CFD simulation of fibre material transport in a PWR core under loss of coolant conditions
- Influence of corrosion processes on the head loss across ECCS sump strainers
- Analyses and estimation of insulation material release in E.ON-PWR under loss of coolant conditions
- Analyses of loss-of-coolant accidents involving release of insulation material under consideration of the measures taken for PWR from expert's point of view
- Evidence of having control over loss-of-coolant accidents with release of insulation material under consideration of actions taken in German BWR
