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3. Defense in depth
For the environment of a nuclear power plant, radiological risks are essentially associated with the possibility of disseminating radioactive substances present in the reactor core and in spent fuel storage (in pools in the case of French facilities), as well as, to a lesser extent, in process fluids; these are essentially fission or activation products.
Containment of these radioactive substances is achieved by interposing "barriers" between them and the environment, to prevent them from spreading. Schematically, for a pressurized water reactor (PWR) of the type operated in France, there are three main "barriers" between the fuel and the fission products created in the reactor core, on the one hand, and the environment, on the other: these are the fuel rod cladding, inside which the fuel pellets (UO 2 or UO ...
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Defense in depth
The contribution of probabilistic safety assessments
Bibliography
Websites
International Commission on Radiological Protection (ICRP) http://www.icrp.org
Legifrance, public service for the dissemination of law via the Internet http://www.legifrance.gouv.fr
Regulations
Directive n° 2009/71/Euratom of June 25, 2009, establishing a Community framework for the nuclear safety of nuclear installations.
Directive No. 2014/87/Euratom of July 8, 2014, establishing a Community framework for the nuclear safety of nuclear installations.
Law no. 2006-686 of June 13, 2006 on nuclear transparency and safety.
Decree no. 2007-1557...
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