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Special nuclear materials SNM

The hulls are the first material removed from the process to merit concern in respect to safeguards. These represent a possible route for special nuclear material (SNM) to be clandestinely removed from the system. Special instmmentation is used to assay the hulls containers for residual SNM. This step not only monitors the dissolver for proper functioning, but also serves an accountancy function as a material access area portal and enables the satisfaction of contractual requirements regarding process losses (40). [Pg.206]

The licensing process consists of two steps construction and operating license that must be completed before fuel loading. Licensing covers radiological safety, environmental protection, and antitru,st considerations. Activities not defined as production or utilization of special nuclear material (SNM), use simple one-step. Materials Licenses, for the possession of radioactive materials. Examples are uranium mills, solution recovery plants, UO fabrication plants, interim spent fuel storage, and isotopic separation plants. [Pg.19]

Acquisition of a militarily significant nuclear capability involves, however, more than simply the purchase or construction of a single nuclear device or weapon. It requires attention to issues of safety and handling of the weapons, reliability and predictability of entire systems, efficient use of scarce and valuable special nuclear material (SNM) (plutonium and enriched uranium), chains of custody and procedures for authorizing the use of the weapons, and the careful training of the military personnel who will deliver weapons to their targets. [Pg.24]

Barriers A system of barriers or other impediments to delay, channel personnel, or deny access to Special Nuclear Material (SNM) or vital areas. [Pg.47]

Weapons-grade nuclear materials are usually kept in safe custody by all nations. Special nuclear materials (SNMs), which are fissionable radionuclides, are of special interest to the nations concerned. The advent of radiological dispersion devices (RDD), however, changed the entire scenario. An RDD is a weapon that might be deliberately employed by terrorist rmits to disturb the harmony in a corrrmrmity. The dirty bomb is an example of an RDD. The concept of a dirty bomb involves the packaging of explosives with radioactive material. The intention is to disperse the radioactive material when the bomb detorrates. However, an RDD can also be employed to distribute the radioactive material in... [Pg.263]

N Reactor Is a 4,000-MW thermal nuclear reactor used to produce special nuclear materials (SNM) and byproduct steam that provided electricity to the Washington Public Power Supply System s (Supply System s) 860-MW Hanford Generating Plant (HGP) located adjacent to N Reactor. N Reactor Is situated on 640 acres of land along the Columbia River. The facility was built In 1963 and operated until 1986 when DOE Initiated a series of safety enhancements. [Pg.23]

SPECIAL NUCLEAR MATERIAL. The U S. Atomic Energy Act of 1954 defines special nuclear material (SNM) as any isotope of plutonium, or uranium that has been enriched in either uranium-233 or uranium-235. See also HIGHLY ENRICHED URANIUM (HEU) LOW-ENRICHED URANIUM (LEU). [Pg.199]

The Atomic Energy Act of 1954 defines special nuclear materials (or SNM) as U, plutonium, or vanium enriched in These are the fissile isotopes (nuclides that undergo fission with high probability when irradiated with neutrons of any energy) that can be... [Pg.2872]

The product, called uranium ore concentrate (and sometimes yellow cake), contains 65%-85% UjOg, is then shipped to the UCF where the uranium is dissolved and concentrated, and then pnrifled and converted either to the proper form needed for fnel elements (usnally nraninm oxide for graphite type or heavy water reactors) or to the feed material reqnired for isotope enrichment (usually uranium hexafluoride) (Figure 1.10). Following is either fabrication of fuel elements or enrichment to LEU for fneling light water reactors or to HEU for special reactors or nuclear weapons (special nnclear materials (SNM)). The product of the enrichment process, either LEU or HEU, mnst then be converted into the suitable form for the applicatiou— once again nsnally an oxide or metal. [Pg.27]

SNM Special Nuclear Material. Plutonium and uranium (usually enriched to greater than 20% in U and hence called highly-enriched uranium ), other transuranics. Often materials suitable for nuclear weapons. [Pg.379]


See other pages where Special nuclear materials SNM is mentioned: [Pg.232]    [Pg.11]    [Pg.118]    [Pg.2839]    [Pg.335]    [Pg.54]    [Pg.229]    [Pg.232]    [Pg.11]    [Pg.118]    [Pg.2839]    [Pg.335]    [Pg.54]    [Pg.229]    [Pg.2839]    [Pg.318]    [Pg.282]   


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