Individual:
http://rdf.iit.demokritos.gr/2014/iaeaSafetyGlossary/id332
Annotations (2)
-
nreo:canonicalLabel "!" (en)
-
skos:definition "The scale should not be confused with 'emergency classification' systems, and <br/>should not be used as a basis for 'emergency response' actions.<br/>
<b>!</b> The <br/>
'INES' terminology — particularly the use of the terms 'incident' and<br/>
'accident—' is different from that used in 'safety standards', and great care <br/>should be taken to avoid confusion between the two. Unless otherwise <br/>indicated, the terms 'incident' and 'accident' are used in this Safety Glossary with <br/>their 'safety standards' meaning (see 'incident' and 'accident' (1) and under 'event').<br/>
Level 0 (<i><b>deviation</b></i>): An 'event' with no 'safety' significance.<br/>
Level 1 (<i><b>anomaly</b></i>): An 'event' beyond the authorized operating regime, <br/>but not involving significant 'failures' in 'safety' provisions, significant <br/>spread of 'contamination' or overexposure of 'workers'.<br/>
Level 2 (<i><b>incident</b></i>): [An 'event' involving significant 'failure' in <i>safety<br/></i>provisions, but with sufficient 'defence in depth' remaining to cope with <br/>additional 'failures' and/or resulting in a 'dose' to a 'worker' exceeding a <br/>statutory 'dose limit' and/or leading to the presence of 'activity' in <i>on-site<br/></i>areas not expected by 'design' and which require corrective action.]<br/>
Level 3 (<i><b>serious incident</b></i>): [A minor' accident', where only the last layer of <br/>'defence in depth' remained operational and/or involving severe spread of <br/>'contamination' 'on-site' or 'deterministic effects' to a 'worker' and/or a very <br/>small release of 'radioactive material' 'off-site' (i.e. a 'critical group dose' of <br/>the order of tenths of a millisievert).]<br/>
Level 4 (<i><b>accident without significant off-site risk</b></i>): An 'accident' involving <br/>significant damage to the installation (e.g. partial core melt) and/or <br/>overexposure of one or more 'workers' resulting in a high probability of <br/>death and/or an 'off-site' release such that the 'critical group dose' is of the <br/>order of a few millisieverts.<br/>
Level 5 (<i><b>accident with off-site risk</b></i>): An 'accident' resulting in severe <br/>damage to the installation and/or an 'off-site' release of <i>radioactive <br/>material</i> radiologically equivalent to hundreds or thousands of TBq of <br/>131I, likely to result in partial implementation of 'countermeasures' covered <br/>by 'emergency plans'.<br/>
E.g. the 1979 'accident' at Three Mile Island, USA (severe damage to the <br/>installation) or the 1957 'accident' at Windscale, UK (severe damage to the <br/>installation and significant 'off-site' release).<br/>
Level 6 (<i><b>serious accident</b></i>): An 'accident' involving a significant release of <br/>'radioactive material' and likely to require full implementation of planned <br/>'countermeasures', but less severe than a 'major accident'.<br/>
E.g. the 1957 'accident' at Kyshtym, USSR (now in the Russian Federation).<br/>
Level 7 (<i><b>major accident</b></i>): An 'accident' involving a major release of <br/>'radioactive material' with widespread health and environmental effects.<br/>
E.g. the 1986 'accident' at Chernobyl, USSR (now in Ukraine).<br/>
<i><b>incident.</b></i> [An 'event' classified as Level 1, 2 or 3, i.e. beyond the authorized <br/>operating regime, but not as serious as an 'accident'.]<br/>
<i><b>accident.</b></i> [An 'event' classified as Level 4, 5, 6 or 7, i.e. that involves a <br/>release of 'radioactive material' 'off-site' likely to cause 'public exposure' at <br/>least of the order of 'authorized limits' or requiring 'countermeasures' to be <br/>taken, or causes significant damage to the installation, or results in <br/>'exposure' of 'workers' 'on-site' to such a degree that there is a high <br/>probability of early death.]<br/>
<b>!</b> There remains a fundamental mismatch between the terminology used in <br/>
'safety standards' and that used in 'INES'. In short, 'events' that would be <br/>considered 'accidents' according to the 'safety standards' definition may be <br/>'accidents' or 'incidents' (i.e. not 'accidents') in 'INES' terminology. This is not a <br/>serious day to day technical problem because the two areas are quite separate. <br/>However, it is a potential problem for public communication.<br/>" (en)
Types (1)
Usage (23)