Description: Das Projekt "Long-term stability and leak tightness of reactor containments" wird vom Umweltbundesamt gefördert und von Zerna, Schnellenbach und Partner GmbH durchgeführt. Objective: the objective of this research is to study the long-term performance of structures comprising nuclear power plants. The time period of interest for this study is 140 years (this figure is based on maximum periods of 40 years for operation and 100 years of storage). Particular attention will be given to those parts of the plant for which leak tightness and structural integrity are required, both during operation and for long periods after final shutdown. This research will be executed in close cooperation with Taylor Woodrow construction ltd. The specific aim of this research is to investigate the behaviour of complex composite structures, taking as a basis the long-term behaviour of materials. The possible susceptibility to long-term damage will also be assessed, and the areas most prone to such damage will be identified. Further consideration will be given to the possible interaction between sealing steel components (steel containments, steel liners) and load bearing concrete structures. This building survey will be carried out on structural elements of actual pwr stations (e.g. Emsland-Lingen) and bwr stations (e.g. Gundremmingen b and c). Consideration will be given to the validity of the investigations for relevant structures of other commercial nuclear power plants in the European community. This investigation will include the shut-down bwr station of garigliano in Italy. General information: 1. Investigation on reinforced concrete and prestressed concrete structures. 1.1. Selection of structural elements considered important with regard to the integrity of long-term containment. 1.2. Literature study on material behaviour covering long-term properties. 1.3. Analysis of the long-term behaviour of the selected structural elements. 2. Investigation of steel containments. 2.1. Selection of elements susceptible to damage, in particular plastic sealings with concrete and steel. 2.2. Assessment of damage (state of material, types of corrosion, formation of condensed moisture, permeability of the concrete, etc.). 2.3. Optimization of ultrasonic testing techniques (angular sound, weakening, creep wave, etc.) And application of the selected techniques to decommissioned Niederaichbach and Gundremmingen i nuclear power plants. 3. Recommendations for monitoring and enhancing long-term integrity of reinforced and prestressed concrete and for assessment of in-situ corrosion of steel elements. Achievements: The main elements of reinforced concrete and prestressed concrete structures of reactor buildings were investigated concerning their long term performance, a period of about 100 years after decommissioning. As reference plants 2 German nuclear power plants were chosen, one pressurized water reactor (PWR) type and one boiling water reactor BWR type. A survey of the general long term behaviour of the structural elements, and especially of their components, concrete and reinforcement steel, was made. The development of strength and the ...
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Stahlbeton ? Beton ? Kunststoff ? Druckwasserreaktor ? Siedewasserreaktor ? Bauphysik ? Kombinationswirkung ? Langzeitwirkung ? Europäische Gemeinschaften ? Italien ? Main ? Ultraschallanwendung ? Containment ? Endlagerung ? Gebäude ? Kernkraftwerk ? Kerntechnische Anlage ? Materialprüfung ? Messtechnik ? Reaktorsicherheit ? Korrosion ? Literaturstudie ? Analyseverfahren ? Monitoring ? Permeabilität ? Reaktor ? Risikoanalyse ? Sicherheitstechnik ? Anwendungstechnik ? Studie ? Ultraschall ? Werkstoffkunde ? Wirkungsanalyse ? Stahl ? Bewertungsverfahren ? Schadensbewertung ? Langzeitverhalten ? Lebenszyklus ? Forschungskooperation ? Forschungsprogramm ? Stilllegung ? Zusammenarbeit ? Abdichtung ? Gefahrenvorsorge ? in situ ? Sicherheitsanalyse ? Anlagenbetrieb ? Leckage ? Handlungsorientierung ? Eignungsfeststellung ? Kondensat ? Lagerungsbedingung ? Untersuchungsprogramm ?
Region: Nordrhein-Westfalen
Bounding box: 6.76339° .. 6.76339° x 51.21895° .. 51.21895°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1986-04-01 - 1988-12-31
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