|Contributions||United States. Dept. of Energy.|
|The Physical Object|
|Pagination||236 p. in various pagings :|
|Number of Pages||236|
Provides current statistical data on fuel assemblies irradiated at commercial nuclear reactors operating in the U.S. Provides data on the current inventories and storage capacities at these reactors. Detailed statistics on these data are presented in 4 chapters that highlight spent fuel discharges, storage capacities and inventories, canister and nonfuel component data, and assembly. The intermediate storage of research reactor spent nuclear fuel is a real challenge for operators, as this period in some cases can extend for over 50 years until a final decision is made. To support their needs, the IAEA has carried out successive coordinated research projects (CRPs) on spent fuel performance and the behaviour of spent fuel assemblies in storage since the s. After nuclear fuel has been used for five to six years to furnish the power to produce electricity, the spent (or used) fuel, which is still highly radio-active, must be stored on the reactor site until it can be moved to a geological disposal site.
The U.S. has by far the largest holding of spent fuel. As of the end of , the total U.S. stockpile of spent power-reactor fuel tons, includ tons in dry casks.4 Country Spent Fuel Inventory (tons of heavy metal) end of Spent Fuel Policy Can Direct disposal Finland 1, Direct disposal. Because of the unavailability of off-site storage for spent power-reactor fuel, the NRC has allowed high-density storage of spent fuel in pools originally designed to hold much smaller inventories. As a result, virtually all U.S. spent-fuel pools have been re-racked to hold spent-fuel assemblies at densities that approach those in reactor cores. The data include detailed characteristics of spent nuclear fuel discharged from commercial U.S. nuclear power plants and currently stored at commercial sites in the United States. Utilities were not required to report spent nuclear fuel assemblies shipped to away-from-reactor, off-site facilities. 1 The term used nuclear fuel is sometimes used in place of spent nuclear fuel; either terminology refers to irradiated fuel discharged from a nuclear reactor. Distribution of U.S. Light Water Reactor SNF assemblies through mid by burnup and enrichment characteristics.
Because of the unavailability of off-site storage for spent power-reactor fuel, the NRC has allowed high-density storage of spent fuel in pools originally designed to hold much smaller inventories. Current wet and dry spent fuel storage systems on the surface can operate for between 50 and years. After cooling in the spent fuel pool, spent fuel is placed into certified casks, steel containers with concrete shells, on site of the plant. Because no permanent repository for spent fuel exists in the United States, reactor owners have kept spent fuel at the reactor sites. As the amount of spent fuel has increased, the Nuclear Regulatory Commission has authorized many power plant owners to increase the amount in their storage pools to as much as five times what they were designed.