Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

The book analyses the risks of nuclear power stations. The security concept of reactors is explained. Measures against the spread of radioactivity after a severe accident, accidents of core melting and a possible crash of an air plane on reactor containment are discussed. The book covers three scientific subjects of the safety concepts of Light Water Reactors: - A first part describes the basic safety design concepts of operating German Pressurized Water Reactors and Boiling Water Reactors including accident management measures introduced after the reactor accidents of Three Mile Island and Chernobyl. These safety concepts are also compared with the experiences of the Fukushima accidents. In addition, the safety design concepts of the future modern European Pressurized Water Reactor (EPR) and of the future modern Boiling Water Reactor SWR-1000 (KERENA) are presented. These are based on new safety research results of the past decades. - In a second, part the possible crash of military or heavy commercial air planes on reactor containment is analyzed. It is shown that reactor containments can be designed to resist to such an airplane crash. - In a third part, an online decision system is presented. It allows to analyze the distribution of radioactivity in the atmosphere and to the environment after a severe reactor accident. It provides data for decisions to be taken by authorities for the minimization of radiobiological effects to the population. This book appeals to readers who have an interest in save living conditions and some understanding for physics or engineering.

In diesem Buch werden die Risiken von Kernkraftwerken und der verantwortungsbewusste Umgang damit zur Vermeidung von Stoerfallen mit Aussenwirkung in einer fur den Laien verstandlichen Form erklart. Dazu werden die Grundlagen der Kernkraftwerkstechnologie und die Sicherheitsmassnahmen erlautert, auch mit Blick auf in der Vergangenheit eingetretene Stoerfalle. Nach kurzer Darstellung der in der Welt betriebenen Kernkraftwerke und der zugehoerigen Brennstoff-Kreislauf-Anlagen werden die in den nachsten Jahren in Deutschland verbleibenden Druck- und Siedewasser-Reaktoren sowie die neu entwickelten Reaktoren - der Europaische Druckwasser-Reaktor (EPR) und der neu entwickelte Siedewasserreaktor SWR-1000 (KERENA) - beschrieben. Danach werden das reaktorphysikalische und das sicherheitstechnische Gesamtkonzept dieser Reaktoren und die in einem Genehmigungsverfahren zu erstellenden Analysen fur die Auslegungsstoerfalle dargestellt. Nach kurzer Diskussion der Ergebnisse von probabilistischen Analysen und der Ergebnisse von fruheren Risikostudien werden neuere sicherheitstechnische Forschungsergebnisse vorgestellt, die in den letzten 20 Jahren zum Thema Kernschmelz-Unfalle und deren sicherheitstechnischer Beherrschung in Europa und vor allem im fruheren Kernforschungszentrum und der Universitat Karlsruhe erzielt wurden. Diese Forschungsergebnisse haben Auswirkungen auf die Sicherheit bestehender Druck- und Siedewasserreaktoren in Deutschland. Sie sind aber vor allem in das Sicherheitskonzept der neuen europaischen Druck- und Siedewasserreaktoren (EPR und KERENA) eingeflossen. Das Buch wendet sich an Ingenieure im Bereich Kerntechnik, aber auch an interessierte Laien.