Individual:
http://rdf.iit.demokritos.gr/2014/iaeaSafetyGlossary/id805
Annotations (2)
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nreo:canonicalLabel "waste classes" (en)
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skos:definition "High level waste<br/>
[HGW]: mainly HLW<br/>
[ILW] <br/>
Radioactive<br/>
Increasing<br/>
waste <br/>
activity<br/>
concentration<br/>
Low and intermediate<br/>
[LLW] <br/>
level waste<br/>
Exempt waste<br/>
Classes not in square brackets are those recommended in Ref. [45]. This <br/>classification system is organized to take into account matters considered of <br/>prime importance for 'disposal safety'. A number of issues related to <i>waste<br/></i>classification are currently under review.<br/>The other classes listed below (in square brackets) are sometimes used, e.g. in <br/>national classification systems, and are mentioned here to indicate how they <br/>typically relate to the classes in Ref. [45].<br/>Other systems classify 'waste' on other bases, such as according to its origin <br/>(e.g. reactor 'operations' 'waste', 'reprocessing' 'waste', 'decommissioning' 'waste' and <br/>defence 'waste').<br/>
<i><b>exempt waste. </b></i>See' waste.'<br/>
<b>['heat generating waste (HGW)'</b><b>]'.'</b> 'Radioactive waste' that is sufficiently <br/>'radioactive' that the decay heat significantly increases its temperature and <br/>the temperature of its surroundings.<br/>
In practice, 'heat generating waste' is normally 'high level waste', although some <br/>types of 'intermediate level waste' may qualify as 'heat generating waste'.<br/>
<i><b>high level waste (HLW).</b></i> The 'radioactive' liquid containing most of the <br/>'fission products' and actinides present in 'spent fuel' — which forms the <br/>residue from the first solvent extraction cycle in 'reprocessing' — and some <br/>of the associated 'waste' streams; this material following solidification; <br/>'spent fuel' (if it is declared a 'waste'); or any other 'waste' with similar <br/>radiological characteristics.<br/>
Typical characteristics of 'high level waste' are thermal power above about <br/>2 kW/m3 and long lived radionuclide concentrations exceeding the limitations <br/>for 'short lived waste' [45].<br/>
<b>['intermediate level waste (ILW)'</b><b>]'.'</b> See <i>low and intermediate level waste <br/>(LILW)</i>.<br/>
<i><b>long lived waste.</b></i> 'Radioactive waste' that contains significant levels of <br/>radionuclides with a 'half-life' greater than 30 years.<br/>
Typical characteristics are long lived radionuclide concentrations exceeding <br/>the limitations for 'short lived waste' [45].<br/>
<i><b>low and intermediate level waste (LILW).</b></i> 'Radioactive waste' with <br/>radiological characteristics between those of 'exempt waste' and <i>high level <br/>waste</i>. This may be 'long lived waste' <i><b>(LILW-LL)</b></i> or <i>short lived waste<br/><b>(LILW-SL)</b></i>.<br/>
Typical characteristics of 'low and intermediate level waste 'are 'activity' levels <br/>above 'clearance levels' and thermal power below about 2 kW/m3 [45].<br/>Many States subdivide this class in other ways, for example into <i><b>low level <br/>waste (LLW)</b></i> and <i><b>intermediate level waste (ILW)</b></i> or <i><b>medium level waste <br/>(MLW)</b></i>, often on the basis of 'waste acceptance requirements' for <i>near surface <br/>repositories</i>. These terms should not be used in 'IAEA publications' unless <br/>explicit definitions are given for the purposes of the publication in question.<br/>
<b>['low level waste (LLW)'</b><b>]'.'</b> See 'low and intermediate level waste (LILW)'.<br/>
<b>['medium level waste (MLW)'</b><b>]'.'</b> See <i>low and intermediate level waste <br/>(LILW)</i>.<br/>
<i><b>short lived waste.</b></i> 'Radioactive waste' that does not contain significant <br/>levels of radionuclides with a 'half-life' greater than 30 years.<br/>
Typical characteristics are restricted long lived radionuclide concentrations <br/>(limitation of long lived radionuclides to 4000 Bq/g in individual <i>waste <br/>packages</i> and to an overall average of 400 Bq/g per 'waste package'); see paras <br/>324 and 325 of Ref. [45].<br/>
<b>['very low level waste (VLLW)'</b><b>]'.'</b> ['Radioactive waste' considered suitable <br/>by the 'regulatory body' for 'authorized disposal', subject to specified <br/>conditions, with ordinary 'waste' in 'facilities' not specifically designed for <br/>'radioactive waste disposal'.]<br/>
This is a category used in some Member States; in others there is no such <br/>category, as no 'radioactive' 'waste' at all may be disposed of in this way, however <br/>low level it is.<br/>" (en)
Types (1)
Usage (22)