Individual:
http://rdf.iit.demokritos.gr/2014/iaeaSafetyGlossary/id375
Annotations (2)
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nreo:canonicalLabel "limit" (en)
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skos:definition "The value of a quantity used in certain specified 'activities' or <br/>
circumstances that must not be exceeded. (From Ref. [1].)<br/>
<b>!</b> The term 'limit' should only be used for a criterion that must not be exceeded, e.g. <br/>
where exceeding the 'limit' would cause some form of legal sanction to be <br/>invoked. Criteria used for other purposes — e.g. to indicate a need for closer <br/>investigation or a review of 'procedures', or as a threshold for reporting to a <br/>'regulatory body' — should be described using other terms, such as 'reference level'.<br/>
<i><b>acceptable limit.</b></i> A 'limit' acceptable to the 'regulatory body'.<br/>
The term 'acceptable limit' is usually used to refer to a 'limit' on the predicted <br/>radiological consequences of an 'accident' (or on 'potential exposures' if they <br/>occur) that is acceptable to the relevant 'regulatory body' when the probability <br/>of occurrence of the 'accident' or 'potential exposures' has been taken into <br/>
account (i.e. on the basis that it is unlikely to occur). The term <i>authorized limit<br/></i>should be used to refer to 'limits' on 'doses' or 'risks', or on releases of <br/>radionuclides, which are acceptable to the 'regulatory body' on the assumption <br/>that they are likely to occur.<br/>
<i><b>annual limit on exposure (ALE).</b></i> The 'potential alpha energy exposure' in <br/>a year that would result in inhalation of the 'annual limit on intake (ALI)'.<br/>
Used for 'exposure' to 'radon progeny' and 'thoron progeny'.<br/>In units of J·h/m3.<br/>
<i><b>annual limit on intake (ALI).</b> </i>The 'intake' by inhalation or ingestion or <br/>through the skin of a given radionuclide in a year by 'Reference Man' which <br/>would result in a 'committed dose' equal to the relevant 'dose limit'. (From <br/>Ref. [1].)<br/>
The 'annual limit on intake' is expressed in units of 'activity'.<br/>See Ref. [28].<br/>
<i><b>authorized limit.</b></i> A 'limit' on a measurable quantity, established or <br/>formally accepted by a 'regulatory body'.<br/>
<b>!</b> Wherever possible, 'authorized limit' should be used in preference to <br/>
'prescribed limit'.<br/>Equivalent in meaning to 'prescribed limit', 'authorized limit' has been more <br/>commonly used in 'radiation' 'safety' and 'waste' 'safety', particularly in the context <br/>of 'limits' on 'discharges'.<br/>
<i><b>derived limit.</b></i> A 'limit' on a measurable quantity set, on the basis of a <br/>'model', such that compliance with the 'derived limit' may be assumed to <br/>ensure compliance with a 'primary limit'.<br/>
<i><b>dose limit.</b></i> The value of the 'effective dose' or the 'equivalent dose' to <br/>individuals from controlled 'practices' that shall not be exceeded. (From <br/>Ref. [1].)<br/>
<i><b>operational limits and conditions.</b></i> A set of rules setting forth parameter <br/>'limits', the functional capability and the performance levels of equipment <br/>and personnel approved by the 'regulatory body' for safe 'operation' of an <br/>'authorized facility'.<br/>
<b>['prescribed limit'</b><b>]'.'</b> A 'limit' established or accepted by the 'regulatory body'.<br/>
The term 'authorized limit' is preferred.<br/>
<i><b>primary limit.</b></i> A 'limit' on the 'dose' or 'risk' to an individual.<br/>
<i><b>safety limits.</b></i> 'Limits' on operational parameters within which an <br/>'authorized facility' has been shown to be safe.<br/>
'Safety limits' are 'operational limits and conditions' beyond those for <i>normal <br/>operation</i>.<br/>
<b>['secondary limit'</b><b>]'.'</b> A 'limit' on a measurable quantity that corresponds to a <br/>'primary limit'.<br/>
<b>!</b> Such <br/>
a <br/>
'limit' meets the definition of 'derived limit', and 'derived limit' should be <br/>
used.<br/>E.g. the 'annual limit on intake', a 'secondary limit', corresponds to the <i>primary <br/>limit</i> on 'annual effective dose' for a 'worker'.<br/>
<b>linear energy transfer (LET), 'L'</b>Δ<br/>
Defined generally as:<br/>
d'E 'ˆ<br/>
'L'D = ÊËÁ d ¯˜ D<br/>
where d'E' is the energy lost in traversing distance d and Δ is an upper bound on <br/>the energy transferred in any single collision.<br/>
A measure of how, as a function of distance, energy is transferred from <br/>'radiation' to the exposed matter. A high value of <i>linear energy transfer<br/></i>indicates that energy is deposited within a small distance.<br/>'L'∞ (i.e. with Δ = ∞) is termed the <i><b>unrestricted linear energy transfer</b></i> in <br/>defining the 'quality factor'.<br/>'L'Δ is also known as the <i><b>restricted linear collision stopping power</b></i>.<br/>" (en)
Types (1)
Usage (42)