Technical Bases for Yucca Mountain Standards (1995) / Chapter Skim
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GLOSSARY
GLOSSARY
Pages 189-198
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From page 189... ...
The region of the earth in which environmental pathways for transfer of radionuclicles to living organisms are locater} ant! by which radionuclicles in air, ground water, and soil can reach humans to be inhaled, ingested, or absorbed through skin.
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From page 190... ...
Critical pathway Disposal Disposal package Dose The dominant environmental pathway through which a given radionuclide reaches the critical group. Permanent isolation of spent nuclear fuel or radioactive waste from the accessible environment with no intent of recovery, whether or not such isolation permits the recovery of such fuel or waste.
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From page 191... ...
Ground water The principal means by which radionuclides can be transport mobilized from an underground repository ant} moved into the biosphere. Avoiding or minimizing such transport is the basis for selecting and designing repository systems.
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From page 192... ...
Other highly radioactive material that the U.S. Nuclear Regulatory Commission, consistent with existing law, determines by rule requires permanent isolation.
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From page 193... ...
Natural The amount of radiation to which a member of the background population is exposed from natural sources, such as radiation terrestrial radiation due to naturally occurring radionuclides in the soil, cosmic radiation originating in outer space, and naturally occurring raclionuclides deposited in the human body. NCRP National Council on Radiation Protection ant} Measurements is an organization of nationally recognized scientists who share the belief that significant advances in radiation protection and measurement can be achieved through cooperative effort.
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From page 194... ...
Radioactive The spontaneous transformation of a nuclide into clecay one or more different nuclides accompanied by either the emission of energy or particles. Unstable atoms decay into a more stable state, eventually reaching a form that floes not decay further or is very long-liveti.
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From page 195... ...
Such term includes both surface and subsurface areas at which high-level radioactive waste and spent nuclear fuel handling activities are conducted. Risk In the context of this study, risk is the probability of an individual receiving an adverse health effect and includes the probability of getting a dose.
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From page 196... ...
Beneath flooded areas or in perched water bociies the fluid pressure locally may be greater than atmospheric. Also referred to as vadose zone.
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From page 197... ...
Waste form The radioactive waste materials and any encapsulating or stabilizing matrix. Waste package The waste form and any containers, shielding, packing anti other absorbent materials immecliately surrounding an individual waste container.
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