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252 Cf is a very strong neutron emitter, which makes it extremely radioactive and harmful. [24] [25] [26] 252 Cf, 96.9% of the time, alpha decays to curium-248; the other 3.1% of decays are spontaneous fission. [11] One microgram (μg) of 252 Cf emits 2.3 million neutrons per second, an average of 3.7 neutrons per spontaneous fission. [27]
Californium-252 production diagram. Californium-252 (Cf-252, 252 Cf) undergoes spontaneous fission with a branching ratio of 3.09% and is used in small neutron sources. Fission neutrons have an energy range of 0 to 13 MeV with a mean value of 2.3 MeV and a most probable value of 1 MeV. [11]
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The plant supplies 6% of California's power, but carries a 1 in 37,000 chance of experiencing a Chernobyl-style nuclear meltdown within five years. Earthquake risks and rising costs: The price of ...
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The controversial project, which has been in the works for decades, was formally approved in December.
SR 252 was defined as Route 283 in 1959, [2] and was redesignated as Route 252 in the 1964 state highway renumbering. [3] The California Highway Commission reviewed a 1.8-mile (2.9 km) proposal for the route in 1965. [24] It was known as the El Toyon Freeway, and plans were to use it to balance the congestion between I-5 and I-805.
This list is incomplete; you can help by adding missing items. (August 2008) ... California State Route 252 (former) Georgia State Route 252; Indiana State Road 252;