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| Keywords: BWR Mark I Containment, diagram.png en Diagram of a typical Boiling water reactor BWR Mark I Concrete Containment with Steel Torus as used in the BWR/1 BWR/2 BWR/3 and some BWR/4 model reactors fr Diagrame/coupe d'un réacteur à eau bouillante REB typique de type Mark I à enceinte de confinement en béton avec tore d'acier sous-jacent tel qu'utilisé dans les réacteurs de type REB/1 REB/2 REB/3 et certains REB/4 Page 15 pdf 40 Containment Integrity Research at Sandia National Laboratories - An Overview Manuscript completed March 2006 Published July 2006 id NUREG/CR-6906 and SAND2006-2274P http //www nrc gov/reading-rm/doc-collections/nuregs/contract/cr6906/cr6906 pdf - Prepared by Sandia National Laboratories for the U S Nuclear Regulatory Commission Job Code Y6757 Sandia National Laboratories Source published July 2006 but this diagram may predate this <gallery> File BWR Mark I Containment sketch png Rough sketch inspired by this original File Reaktor svg Better diagram but at 90 degree rotation </gallery> The two diagrams on the same page are labeled Figure 5 Typical BWR Mark I Concrete Containment with Steel Torus The report text describing the diagrams on page 10 pdf 35 is BWR Mark I The Mark I is a pressure suppression containment Figure 5 which allows the containment to be smaller in volume The containment is divided into the drywell containing the reactor vessel and the wetwell torus containing the suppression pool The containments are constructed of either concrete or steel The water in the suppression pool acts as an energy absorbing medium in the event of an accident If a LOCA loss of coolant accident occurs steam flows from the drywell through a set of vent lines and downcomers into the suppression pool where the steam is condensed Steam can also be released from the reactor vessel through the safety relief valves and associated piping directly into the suppression pool In the event that the pressure in the wetwell exceeds the pressure in the drywell vacuum breakers are provided that equalize the pressure Mark I containments are equipped with lines connected to the wetwell that can be used to vent the containment if the pressure becomes too high PD-USGov ImageNote 1 226 222 306 529 826 852 2 Inverted lightbulb drywell containment chamber ImageNoteEnd 1 ImageNote 2 329 273 96 321 826 852 2 reactor pressure vessel ImageNoteEnd 2 ImageNote 3 314 382 16 231 826 852 2 Cylindrical biological shield ImageNoteEnd 3 ImageNote 4 332 277 92 34 826 852 2 Top head assembly ImageNoteEnd 4 ImageNote 5 274 158 204 94 826 852 2 Drywell head and refueling assembly ImageNoteEnd 5 ImageNote 6 215 94 462 67 826 852 2 Gantry crane ImageNoteEnd 6 Schemata of boiling water reactor | ||||
