摘要:
Core debris generated during a molten reactor core in a reactor containment vessel penetrating the reactor containment vessel is configured to be caught by a core catcher located beneath the reactor containment vessel which has a main body (20) having first stage cooling water channels (21 a) and second stage (21 b) surrounded by cooling fins (31) extending radially. The number of the second stage cooling channels (21 b) is larger than that of the first stage cooling channels (21a). Cooling water is supplied from a cooling water injection opening (22) and distributed to the first cooling water channels (21 a) at a distributor (10). An intermediate header (21) is formed between the first and the second cooling water channels (21 a, 21 b), and the cooling water is distributed to the second cooling water channels (21 b) uniformly.
摘要:
The invention relates to a device for collecting and cooling a melt, especially a core melt in a containment of a nuclear power plant. A porous body (3), with which the melt comes into contact, is provided. A cooling agent being exerted to an admission pressure is supplied to said porous body (3) in such a way that the hollow spaces in the porous body (3) are filled with the cooling agent. After the melt has come into contact with the porous body, the cooling agent being exerted to the admission pressure penetrates said melt which results in fragmentation, solidification and long-term cooling.
摘要:
A nuclear reactor has a propagation chamber (4) for the molten core (17) equipped with a coolant pipe (6) that leads to a coolant reservoir and has a temperature-dependent opening device (16). The coolant pipe (6) in the propagation chamber (4) is a spraying pipe whose spraying surface corresponds to the cross-section of the propagation chamber (4). The opening device (16) is controlled in such a way that it opens when the molten core (17) enters the propagation chamber (4). The sprayed coolant forms a crust on the molten core (17), reducing its heat radiation. At the same time, the propagation chamber (4) is filled with a vapour atmosphere that drastically reduces the thermal stresses to which the building structures are subjected.
摘要:
In order to improve the outflow channel for melt-down products, the device has an antechamber (11) located below the pressure vessel (1) and an expansion chamber (19) for the melt-down products located to one side of the pressure vessel (1). The expansion chamber (19) is connected to the antechamber by a channel (17). A base unit (9) forms the floor of at least the antechamber (11) and is made of a material with a high thermal conductivity.
摘要:
A core catcher (1) comprises a floor (4) with core melt (3) collecting recesses (6). The recesses are separated by overflow ridges (7), which lie below or above the floor level (N) in the core melt entry region and have a conical, pyramidal or dish-like cross-section.
摘要:
The device proposed comprises an antechamber (30) located below the reactor pressure vessel (4) and connected by a channel (36) to an expansion chamber (34). Fitted over the inlet to the channel (36) is a bulkhead or partition (38) which is destroyed by the reactor-meltdown products within a predetermined time interval after the arrival of the meltdown products. A coolant reservoir (50) is connected to the expansion chamber (34), the connection being closed off by a closure element (48) which is also destroyed by the meltdown products. If the closure element is destroyed, by being melted or burst for instance, the coolant flows on to the meltdown products in the expansion chamber (34) and the meltdown products are efficiently cooled.
摘要:
Die Erfindung betrifft einen Behälter (1) zur Aufnahme und Ausbreitung von Kernschmelze (27) einer Kernkraftanlage mit einem strukturierten, insbesondere kassettenartigen Boden (3). Der Boden (3) weist ein gut wärmeleitfähiges Material, eine Mehrzahl von geodätisch höchstliegenden Punkten (4) und eine Mehrzahl von geodätisch tiefstliegenden Punkten (5) sowie eine Außenwandung (15) auf. Die Außenwandung (15) verläuft zwischen einem geodätisch tiefstliegenden Punkt (4) und einem benachbarten geodätisch höchstliegenden Punkt (5) steigend. An jedem geodätisch höchstliegendem Punkt (4) ist eine durch das Behälterinnere (17) verlaufende Dampfleitung vorgesehen. Mit dem Behälter (1) ist eine Außenkühlung von Kernschmelze (27) erreichbar, wodurch die Bildung von radioaktiven Aerosolen, das Auftreten einer Dampfexplosion sowie die Bildung von Wasserstoff vermieden ist. Zudem ist die Kühlung durch den steigenden Verlauf der Außenwandung besonders effektiv, da die Ausbildung eines örtlich fixierten Dampfbereiches, welcher mit einer Verschlechterung der Wärmeleitfähigkeit einhergeht, verhindert ist. Die Erfindung betrifft weiterhin eine Kernkraftanlage mit einem Behälter (1) zur Aufnahme und Ausbreitung von Kernschmelze.