Involved Worker

DOE-HDBK-XXXX-2005

06/30/2005

98. INVOLVED WORKER. Worker who would participate in a proposed action. (See

noninvolved worker.)[Derived from Recommendations Book]

99. IRRADIATED. Exposed to ionizing radiation. [Derived from NRC Glossary, ANSI N1.1]

The condition of reactor fuel elements and other materials in which atoms bombarded with

nuclear particles have undergone nuclear changes. [Derived from UI, MHE]

100. ISOTOPE. Any of two or more variations of an element in which the nuclei have the same

number of protons (i.e., the same atomic number) but different numbers of neutrons so that

their atomic masses differ. Isotopes of a single element possess almost identical chemical

properties, but often different physical properties (e.g., carbon-12 and -13 are stable, carbon-14

is radioactive). [Derived from HPRH, EPA Terms, RHD]

101. LATENT CANCER FATALITIES (LCF). Deaths from cancer resulting from, and occurring

some time after, exposure to ionizing radiation or other carcinogens.

102. LEGAL-WEIGHT TRUCK. A truck that meets vehicle weight limits for U.S. Interstate

Highways. Under Federal regulations (23 CFR 658.17) the total loaded weight of a tractor-

trailer combination is limited to 80,000 pounds (34,874 kilograms). Some states allow heavier

vehicles on highways within the state.

Note: This specific terminology does not appear in the applicable Federal regulations.

[Derived from 23 CFR 658]

103. LIFE CYCLE COSTS.

1. All the anticipated costs associated with a project or program alternative throughout its life.

This includes costs from pre-operations through operations or to the end of the alternative.

[DOE G 430.1-1]

2. All costs, except the cost of personnel occupying the facility, incurred from the time that a

space requirement is defined until that facility passes out of the government's hands. [DOE

6430.1A]

104. LOW-ENRICHED URANIUM (LEU). Uranium whose content of the fissile isotope uranium-

235 has been increased through enrichment to more than 0.7 percent but less than 20 percent

by weight. Most nuclear power reactor fuel contains low-enriched uranium containing 3 to 5

percent uranium-235. [Derived from 10 CFR 50.2 ]

105. LOWEST ACHIEVABLE EMISSION RATE (LAER). The emissions rate permitted for new

sources or major modifications of existing sources in areas that are not in attainment of

A-21