sieverts
Ionizing exposure measure
Sieverts is the plural of sievert, the standard unit measuring radiation dose absorbed by living tissue.
Named for Swedish physicist Rolf Sievert, it accounts for the biological effects of different radiation types.
Small exposures are measured in millisieverts: The CT scan delivered about 10 millisieverts.
A dose of several sieverts causes acute radiation sickness; higher doses are fatal.
Unit of radiation dose
- grayNeutral achromatic hue
- remRoot-based sizing unit
- roentgenRadiation exposure unit
- radExposure measurement unit
conversion · calibration · SI units · measurement · quantify · instrumentation · dosimeter · detector
Illness from ionizing exposure
- cancerUncontrolled cell proliferation disease
- leukemiaMalignancy of blood-forming tissues
- mutationPermanent DNA alteration
- cellsBasic biological units
DNA damage · radiosensitivity · thyroid · bone marrow · tissue damage · carcinogenic · teratogenic · genetic damage
Controlled fission apparatus
- ChernobylSoviet nuclear disaster site
- FukushimaJapanese nuclear accident site
- Three Mile IslandPennsylvania nuclear disaster site
- meltdownCatastrophic loss of control
fission · uranium · plutonium · isotopes · gamma · alpha · beta · neutrons
Increasing by successive additions
- chronicPersisting over time
- acuteIntensely severe or perceptive
- internalSituated within
- externalLocated on outside
occupational · environmental · background · annual limit · lethal dose · LD50 · localized · ingestion
Protecting from harm
- lead apronProtective garment blocking X-rays
- regulationsEnforced rules and standards
- safety protocolsRules ensuring harm prevention
- protective equipmentGear that prevents harm
distance · time · containment · monitoring · compliance · permissible dose · evacuation · iodine tablets
microsievert
Unit of radiation dose
rad · conversion · calibration · SI units · measurement · quantify · instrumentation · dosimeter · detector · benchmark
radiation sickness
Illness from ionizing exposure
- cancerUncontrolled cell proliferation disease
- leukemiaMalignancy of blood-forming tissues
- mutationPermanent DNA alteration
cells · DNA damage · radiosensitivity · thyroid · bone marrow · tissue damage · carcinogenic · teratogenic · genetic damage · radiobiology
reactor
Controlled fission apparatus
- ChernobylSoviet nuclear disaster site
- FukushimaJapanese nuclear accident site
- Three Mile IslandPennsylvania nuclear disaster site
meltdown · fission · uranium · plutonium · isotopes · gamma · alpha · beta · neutrons · decay
cumulative
Increasing by successive additions
external · occupational · environmental · background · annual limit · lethal dose · LD50 · localized · ingestion · inhalation
shielding
Protecting from harm
- lead apronProtective garment blocking X-rays
- regulationsEnforced rules and standards
- safety protocolsRules ensuring harm prevention
protective equipment · distance · time · containment · monitoring · compliance · permissible dose · evacuation · iodine tablets · safeguards