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The RBMK is a class

Science Fiction Quarterly was an American pulp science fiction magazine that was published from 1940 to 1943 and again from 1951 to 1958. Charles Hornig served as editor for the first two issues; Robert A. W. Lowndes edited the remainder. Science Fiction Quarterly was launched by publisher Louis Silberkleit during a boom in science fiction magazines at the end of the 1930s. Silberkleit launched two other science fiction titles at about the same time: all three ceased publication before the end of World War II, falling prey to slow sales and paper shortages. In 1950 and 1951, as the market improved, Silberkleit relaunched Future Fiction and Science Fiction Quarterly. By the time Science Fiction Quarterly ceased publication in 1958, it was the last surviving science fiction pulp magazine, all other survivors having changed to different formats.

The RBMK is a class of graphite-moderated nuclear power reactor designed and built by the Soviet Union. It is somewhat like a boiling water reactor as water boils in the pressure tubes. It is one of two power reactor types to enter serial production in the Soviet Union during the 1970s, the other being the VVER reactor. The name refers to its design where instead of a large steel pressure vessel surrounding the entire core, the core is surrounded by a cylindrical annular steel tank inside a concrete vault and each fuel assembly is enclosed in an individual 8 cm (inner) diameter pipe. The channels also contain the coolant, and are surrounded by graphite.