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http://rdf.iit.demokritos.gr/2014/iaeaSafetyGlossary/id365
Annotations (2)
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nreo:canonicalLabel "level" (en)
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skos:definition "<i><b>action level.</b></i> The level of 'dose rate' or 'activity concentration' above which <br/>'remedial actions' or 'protective actions' should be carried out in <i>chronic <br/>exposure</i> or 'emergency exposure' situations. An 'action level' can also be <br/>expressed in terms of any other measurable quantity as a level above <br/>which 'intervention' should be undertaken.<br/>
<i><b>emergency action level (EAL).</b></i> A specific, predetermined, observable <br/>criterion used to detect, recognize and determine the 'emergency class'.<br/>
An 'emergency action level' could represent an instrument reading, the status of a <br/>piece of equipment or any observable 'event', such as a fire. In this sense, it is not <br/>strictly an 'action level' as defined above, but has essentially the same function.<br/>
<i><b>clearance level.</b></i> A value, established by a 'regulatory body' and expressed <br/>in terms of 'activity concentration' and/or total 'activity', at or below which a <br/>'source' of 'radiation' may be released from 'regulatory control'.<br/>
See also 'clearance' (1).<br/>
<i><b>exemption level.</b></i> A value, established by a 'regulatory body' and expressed <br/>in terms of 'activity concentration', total' activity', 'dose rate' or <i>radiation<br/></i>energy, at or below which a 'source' of 'radiation' may be granted <i>exemption<br/></i>from 'regulatory control' without further consideration.<br/>
A 'regulatory body' may also grant 'exemption' on a case by case basis, following <br/>'notification'. Although the term 'exemption level' does not strictly apply in such <br/>a situation, a criterion for 'exemption' may nevertheless be established by the <br/>'regulatory body', expressed in similar terms or, alternatively, in terms of <br/>'annual dose' on the basis of an appropriate 'dose assessment'. (See para. 5.12 of <br/>Ref. [10] and para. 2.26 of Ref. [27].)<br/>In the BSS [1], the term 'exemption levels' is used, and values are specified in <br/>Table I-I of Schedule I, but neither 'exemption' nor 'exemption level' is defined in <br/>the BSS glossary.<br/>
<i><b>guidance level.</b></i> A level of a specified quantity above which appropriate <br/>actions should be considered. In some circumstances, actions may need to <br/>be considered when the specified quantity is substantially below the <br/>'guidance level'. (From Ref. [1].)<br/>
<i><b>guidance level for medical exposure.</b></i> A value of 'dose', 'dose rate' or <i>activity<br/></i>selected by professional bodies in consultation with the <i>regulatory body<br/></i>to indicate a level above which there should be a review by <i>medical <br/>practitioners</i> in order to determine whether or not the value is excessive, <br/>taking into account the particular circumstances and applying sound <br/>clinical judgement. (From Ref. [1].)<br/>
<i><b>intervention level.</b></i> The level of 'avertable dose' at which a specific <br/>'protective action' is taken in an 'emergency 'or a situation of <i>chronic <br/>exposure</i>.<br/>
<i><b>operational intervention level (OIL).</b></i> A calculated level, measured <br/>by instruments or determined by laboratory analysis, that corresponds <br/>to an 'intervention level' or 'action level'.<br/>
'Operational intervention levels' are typically expressed in terms of <i>dose <br/>rates</i> or of 'activity' of 'radioactive material' released, time integrated air <br/>concentrations, ground or surface concentrations, or <i>activity <br/>concentrations</i> of radionuclides in environmental, food or water samples. <br/>An 'operational intervention level' is a type of 'action level' that is used <br/>immediately and directly (without further 'assessment') to determine the <br/>appropriate 'protective actions' on the basis of an environmental <br/>measurement.<br/>
<i><b>investigation level.</b></i> The value of a quantity such as 'effective dose', <i>intake<br/></i>or 'contamination' per unit area or volume at or above which an <br/>investigation should be conducted. (From Ref. [1].)<br/>
<i><b>level of defence in depth.</b></i> See 'defence in depth'.<br/>
<i><b>recording level.</b></i> A level of 'dose', 'exposure' or 'intake' specified by the <br/>'regulatory body' at or above which values of 'dose', 'exposure' or <i>intake<br/></i>received by 'workers' are to be entered in their individual <i>exposure<br/></i>records. (From Ref. [1].)<br/>
<i><b>reference level.</b></i> An 'action level', 'intervention level', 'investigation level' or <br/>'recording level'. (From Ref. [1].)<br/>" (en)
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