Gretna, Manitoba Gretna after Gretna Green in Scotland, also a border community, where runaway couples were married by the blacksmith at his anvil. Gretna soon became a prominent border community. As businesses thrived and expanded, Gretna life in the early 20th century was filled with promise and opportunity. As progress would have it, changes afforded Gretna no favours and the community began losing the grain milling industry responsible for its boom. After the World War II, Gretna became the centre for oil transfer to the United States of America. Enbridge Pipelines Inc. (the main storage and transfer company of oil in southern
Thermal runaway have led to catastrophic explosions when reaction control failed. Thermal runaway may result from unwanted exothermic side reaction(s) that begin at higher temperatures, following an initial accidental overheating of the reaction mixture. This scenario was behind the Seveso disaster, where thermal runaway heated a reaction to temperatures such that in addition to the intended 2,4,5-trichlorophenol, poisonous 2,3,7,8-tetrachlorodibenzo-p-dioxin was also produced, and was vented into the environment after the reactor's rupture disk burst. Thermal runaway is most often caused by failure of the reactor vessel's cooling system. Failure of the mixer can result in localized heating, which initiates thermal runaway. Similarly,