International Nuclear Event Scale

The International Review Nuclear Event Scale ( INES abbreviation of English International Nuclear Event Scale ) is a specification for security-related events, in particular incidents and nuclear accidents in nuclear facilities, in particular the safety of nuclear power plants in question.

History

The scale was developed by an international group of experts, jointly organized by the International Atomic Energy Agency (IAEA) and the Nuclear Energy Agency of the Organization for Economic Cooperation and Development (OECD) was convened, and in 1990 officially introduced. The aim of the scale is to provide the public on the basis of a reasonable classification of events rapid information on the safety significance of an event and thus to facilitate the communication between experts, the media and the public.

The rating scale originally had seven levels. Later stage 0 was added for events with no safety significance.

Severities

The Level 0 is classified as accidents as a deviation, the steps 1 to 3 are as accidents, the steps 4 to 7. The scale is a logarithmic scale based on: A transition to the next level means so much ten times severity. The reportable levels of events are evaluated according to three aspects:

  • Radiological impacts outside ( people and environment ) of the plant
  • Radiological impacts within the system ( radiological barriers and control )
  • Impairment of the security of the system ( safety barriers)

Using these criteria, the individual stages can be simplified described as follows:

1987: Goiânia accident ( theft of a radiotherapy apparatus ) (44 TBq )

Heavy contamination and / or exposure of the staff, which can lead to acute health effects (of the order 1 Sievert )

Extensive loss of phased safety precautions

2001: Philip Castle, Germany, two incidents; 2002: Nuclear power plant Tihange, Belgium 2006: Forsmark, Sweden; 2010: Body of Bern, Switzerland; 2011: Doel nuclear power plant, Belgium

Event message after INES in Germany

The classification according to INES takes place when an event occurs by the power plant operators. Commissioned by the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety then takes an expert of the Society for Plant and Reactor Safety mbH review of the classification. Deviates the classification of the INES Officers in its review of the classification of the power plant operator from it, they must first place directly to the operator. If no adjustment of the INES level by the operator to take place, the INES officer shall inform the competent national authority and the Federal Ministry of Environment. Events from the INES level 2 are reported directly from the INES Officer to the IAEA in Vienna.

Lists of nuclear disasters and radioactive incidents Becquerel Kyshtym disaster Nuclear reactor core Windscale fire Nuclear meltdown Enrico Fermi Nuclear Generating Station Bohunice Nuclear Power Plant Tihange Nuclear Power Station Forsmark Nuclear Power Plant Cattenom Nuclear Power Plant France New Scientist
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