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Radiation Protection Glossary

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Joule
The Joule (J) is the SI unit of energy. One Joule is the energy expended when a force of one newton is applied over a displacement of one meter in the direction of the force. The use of the joule is probably limited in Radiation Protection but is used in the definition of Absorbed Dose and the Electron volt .
Justification
Justification is one of the first three principles of the ICRP system of radiological protection. Justification, together with Optimisation and Limitation , are used as the basis of Radiation Protection internationally. Justification is defined in the ICRP 60 publication as 'no practice involving exposures to radiation should be adopted unless it produces sufficient benefit to the exposed individual or to society to offset the Detriment it causes'.