{'fraction_non_alphanumeric': 0.037107516650808754, 'fraction_numerical': 0.010466222645099905, 'mean_word_length': 4.686486486486486, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 1, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Revival of Halide Salts as High-Temperature Heat-Transfer Media: Key Technical and Scientific Issues

Molten fluorides were developed in the United States during the period 1950-1975 for use as a high temperature fluid-fuel in a Molten Salt Reactor (MSR). More recently, interest has been renewed in a variety of high temperature heat-transfer applications, both nuclear and non-nuclear. The U.S. Department of Energy – Office of Nuclear Energy (DOE/NE) is exploring the use of molten fluorides as a primary coolant (rather than helium) in a high temperature reactor design. DOE/NE is also supporting the study of molten salt as a secondary coolant to shuttle heat from a high-temperature reactor to a hydrogen production plant. There are also a variety of non-nuclear high-temperature process heat applications (T>700°C) that appear to be uniquely well suited to the use of a molten-salt heat-transfer agent. For example, some are considering molten salt as the heat carrier for the in-situ pyrolysis of oil-shale, rather than using electric heaters.