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Glossary

See also the Full-Text Glossary.

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A1
A2
Access hatch
Activation
Active fuel length
Activity
Agreement State
Air sampling
Airborne radioactivity area
ALARA
Alpha particle
Anion
Annual limit on intake (ALI)
Anticipated transient without scram (ATWS)
Assumptions (for IPEs, IPEEs, and PRAs)
Atom
Atomic energy
Atomic Energy Commission
Atomic number
Attenuation
Auxiliary building
Auxiliary feedwater
Average planar linear heat generation rate (APLGHR)

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Background radiation
Bayesian estimation
Bayesian prior
Becquerel (Bq)
Beta particle
Beyond design-basis accidents
Binding energy
Bioassay
Biological half-life
Biological shield
Boiling water reactor (BWR)
Bone seeker
Breeder
British thermal unit (Btu)
Byproduct

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Calibration
Capability
Capacity factor (gross)
Capacity factor (net)
Cask
Cation
Chain reaction
Charged particle
Chemical recombination
Cladding
Cleanup system
Coastdown
Cold shutdown
Collective dose
Committed dose equivalent (CDE)
Committed effective dose equivalent (CEDE)
Compact
Compound
Condensate
Condenser
Construction recapture
Containment structure
Contamination
Control rod
Control room
Controlled area
Coolant
Cooldown
Cooling tower
Core
Core damage frequency
Core melt accident
Cosmic radiation
Counter
Critical mass
Critical organ
Criticality
Crud
Cumulative dose
Curie (Ci)

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Daughter products
Decay heat
Decay, radioactive
Declared pregnant woman
Decommissioning
DECON
Decontamination
Deep-Dose Equivalent (DDE)
Defense-in-depth
Departure from nuclear boiling ratio (DNBR)
Departure from nucleate boiling (DNB)
Depleted uranium
Derived air concentration (DAC)
Derived Air Concentration-Hour (DAC-hour)
Design-basis accident
Design-basis phenomena
Design-basis threat
Detector
Deterministic (probabilistic)
Deterministic effect
Deuterium
Deuteron
Differential pressure (dp or dP)
Doppler coefficient
Dose
Dose equivalent
Dose rate
Dose, absorbed
Dosimeter
Dosimetry
Drywell

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Earthquake, operating basis
Effective Dose Equivalent
Effective half-life
Efficiency, plant
Electrical generator
Electromagnetic radiation
Electron
Element
Emergency classifications
Emergency core cooling systems (ECCS)
Emergency feedwater
ENTOMB
Environmental qualification
Event Notification (EN) system
Exclusion area
Excursion
Exposure
External radiation
Extremities

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Fast fission
Fast neutron
Feedwater
Fertile material
Film badge
Fiscal year
Fissile material
Fission (fissioning)
Fission gases
Fission products
Fissionable material
Flux
Formula quantity
Fuel assembly
Fuel cycle
Fuel reprocessing
Fuel rod
Fuel temperature coefficient of reactivity
Full-time equivalent
Fusion reaction

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Gamma radiation
Gap
Gas centrifuge
Gas-cooled reactor
Gaseous diffusion plant
Gases
Geiger-Mueller counter
Generation (gross)
Generation (net)
Gigawatt
Gigawatthour
Graphite
Gray (Gy)
Greater than Class C waste or GTCC waste

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Half-life
Half-life, biological
Half-life, effective
Half-thickness
Head, reactor vessel
Health physics
Heap leach
Heat exchanger
Heat sink
Heatup
Heavy water (D2O)
Heavy water moderated reactor
High radiation area
High-enriched uranium
High-level waste
Hot
Hot spot

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In situ leach
In vitro
In vivo
Independent spent fuel storage installation or ISFSI
Individual plant examination (IPE)
Individual plant examination for external events (IPEEE)
Induced radioactivity
Integrated plant evaluation
Iodine spiking factor
Ion
Ion-exchange
Ionization
Ionization chamber
Ionizing radiation
Irradiation
Isotope
Isotope separation
Isotopic enrichment

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[no terms for this letter]

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Kilo-
Kilovolt
Kinetic energy

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Lens Dose Equivalent
Lethal dose (LD)
Licensed Material
Licensing basis
Light water
Light water reactor
Limiting condition for operation
Limiting safety system settings
Linear heat generation rate
Loop
Loss of coolant accident (LOCA)
Low population zone (LPZ)
Low-level waste
Low Specific Activity (LSA)

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Mass number
Mass-energy equation
Maximum dependable capacity (gross)
Maximum dependable capacity (net)
Mega-
Megacurie
Megawatt (MW)
Megawatt hour (MWh)
Metric ton
Micro-
Microcurie
Mill tailings
Milli-
Millirem
Milliroentgen (mR)
Mixed oxide (MOX) fuel
Moderator
Moderator temperature coefficient of reactivity
Molecule
Monitoring of radiation
Monitored Retrievable Storage Installation or MRS

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Nano-
Nanocurie
Natural circulation
Natural uranium
Net summer capability
Neutron
Neutron capture
Neutron chain reaction
Neutron flux
Neutron generation
Neutron leakage
Neutron source
Neutron, thermal
Noble gas
Non-stochastic effect
Non-vital plant systems
Nonpower reactor
Normal form radioactive material
Not Applicable (NA)
Not Reported (NR)
Nozzle
NRC Operations Center
Nuclear energy
Nuclear force
Nuclear power plant
Nuclear steam supply system
Nuclear waste
Nucleon
Nucleus
Nuclide

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Occupational Dose
Operable
Operational mode
Orphan Source

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Packaging
Parent
Parts per million (ppm)
Pellet, fuel
Performance-based regulation
Performance-based regulatory action
Periodic table
Personnel monitoring
Photon
Pico-
Picocurie
Pig
Pile
Planned special exposure
Plausible accidents
Plutonium (Pu)
Pocket dosimeter
Poison, neutron
Pool reactor
Positron
Possession-only license
Power coefficient of reactivity
Power defect
Power reactor
Preliminary Notification (PN)
Pressure vessel
Pressurized water reactor (PWR)
Pressurizer
Primary system
Probabilistic risk analysis
Production expense
Proportional counter
Proprietary information
Proton
Public Dose

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Quality factor
Quantum theory

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Rad
Radiation (ionizing radiation)
Radiation area
Radiation detection instrument
Radiation shielding
Radiation sickness (syndrome)
Radiation source
Radiation standards
Radiation warning symbol
Radiation, nuclear
Radioactive contamination
Radioactive decay
Radioactive series
Radioactivity
Radiography
Radioisotope
Radiological sabotage
Radiological survey
Radiology
Radionuclide
Radiosensitivity
Radium (Ra)
Radon (Rn)
Reaction
Reactivity
Reactor coolant system
Reactor, nuclear
Reasonable
Reference man
Reflector
Rem
Restricted area
Risk
Risk-based decisionmaking
Risk-informed decisionmaking
Risk-informed regulation
Risk-significant
Roentgen (R)
Rubblization

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Safe shutdown earthquake
Safeguards
Safety injection
Safety limit
Safety related
Safety-significant
SAFSTOR
Scattered radiation
Scintillation detector
Scram
Sealed source
Secondary radiation
Secondary system
Seismic category I
Severe accident
Shallow-Dose Equivalent (SDE)
Shielding
Shutdown
Shutdown margin
Sievert (Sv)
Somatic effects of radiation
Source material
Special form radioactive material
Special nuclear material
Spent (depleted) fuel
Spent fuel pool
Spent fuel storage cask or cask
Spent nuclear fuel
Stable isotope
Standard Review Plan
Standard Technical Specifications
Startup
Stay time
Steam generator
Stochastic effects
Subcritical mass
Subcriticality
Supercritical reactor
Supercriticality
Superheating
Surface Contaminated Object (SCO)
Survey meter

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Technical Specifications
Terrestrial radiation
Thermal breeder reactor
Thermal power
Thermal reactor
Thermal shield
Thermalization
Thermoluminescent dosimeter
Thermonuclear
Total Effective Dose Equivalent (TEDE)
Transient
Transuranic element
Transuranic waste
Trip, reactor
Tritium
Turbine
Turbine generator (TG)
Type A package
Type B package

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Ultraviolet
Uncertainty range
Unnecessary regulatory burden
Unrestricted area
Unstable isotope
Unwanted Radioactive Material (Orphan Sources)
Uranium
Uranium fuel fabrication facility
Uranium hexafluoride production facility

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Vapor
Very high radiation area
Viability assessment
Void
Void coefficient of reactivity

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Waste, radioactive
Watt
Watt-hour
Weighting factor (WT)
Well-logging
Wheeling service
Whole-body counter
Whole-body exposure
Wipe sample

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X-rays

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Yellowcake

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Tuesday, June 05, 2007