Spent Nuclear Fuel - doe-hdbk-1188-20060143

DOE-HDBK-1188-2006

233, uranium enriched in the isotopes uranium-233 or -235, and any other material that the Nuclear

Regulatory Commission determines to be special nuclear material, but it does not include source

material. [Derived from AEA, DOE 5610.12, 10 CFR 20, NRC Glossary, MH ]

162. SPENT NUCLEAR FUEL. Fuel that has been withdrawn from a nuclear reactor following

irradiation, the constituent elements of which have not been separated.

Note: 10 CFR 960 and 40 CFR 191 give essentially the same definition, but add "by

reprocessing" after "have not been separated." We do not recommend including this

additional language in NEPA document glossaries, as it unnecessarily raises questions

concerning the meaning of "reprocessing."

[NWPA]

163. STABILITY CLASS. A category characterizing the degree of stability, or absence of turbulence, in

the atmosphere. The classification used for regulatory models and methods for estimating the

appropriate stability category from other meteorological data are given by EPA (1987). The least

stable category is class A, in which the high level of turbulence causes air pollutants from any

particular source to mix rapidly with surrounding air, thereby reducing pollutant concentrations. The

most stable category is class F, in which pollutants are not well mixed but remain in relatively high

concentrations within a smaller volume. Sometimes a seventh category (i.e., G, or extremely stable) is

used to represent extremely stagnant conditions. [Derived from EPA 1987]

164. STOCKPILE MANAGEMENT. Operations associated with production, maintenance,

refurbishment, surveillance, and dismantlement of the U.S. nuclear weapons stockpile.

Related term:

Stockpile surveillance: Routine and periodic examination, evaluation, and testing of nuclear weapons

and weapon components to ensure that they conform to performance specifications and to identify

and evaluate the effect of unexpected or age-related requirements.

165. STOCKPILE STEWARDSHIP. Activities associated with research, design, development, and

testing of nuclear weapons and the assessment and certification of their safety and reliability.

166. SURFACE WATER. All bodies of water on the surface of the earth and open to the atmosphere,

such as rivers, lakes, reservoirs, ponds, seas, and estuaries. [Derived from MH, 40 CFR 141.2]

167. THREATENED SPECIES. Any plants or animals that are likely to become endangered species

within the foreseeable future throughout all or a significant portion of their ranges and which have been

listed as threatened by the U.S. Fish and Wildlife Service or the National Marine Fisheries Service

following the procedures set out in the Endangered Species Act and its implementing regulations (50

CFR 424). (See endangered species.)

A-32