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icrpaedia>Carr at 18:12, 19 March 2018

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'''ICRP develops dose coefficients to simplify the calculation of [[Absorbed, Equivalent, and Effective Dose |equivalent dose]] and [[Absorbed, Equivalent, and Effective Dose |effective dose]] for inhaled or ingested radionuclides.''' 

In simplest terms, calculating the dose from an intake involves multiplying the total amount inhaled or ingested (e.g. in Bq) by the right dose coefficient:

<center>''Effective dose (mSv) = intake (Bq) × dose coefficient (mSv/Bq)''</center>

Or, the bioassay results (measurements of radionuclides in the person or in samples such as urine) can be used, e.g.:

<center>''Effective dose (mSv) = daily excretion in urine (Bq) × dose coefficient (mSv/Bq)''</center>

Choosing the right dose coefficient depends on:
*The radionuclide
*Whether it’s inhaled or ingested
*The particle size (for inhalation)
*The chemical form
*The time since the intake (if using bioassay data)

----

{|
|style="width: 20%;" |{{#evt:service=youtube|id=https://www.youtube.com/watch?v=5UeugwibBDk|dimensions=350}}
|Watch a presentation by Francois Paquet, Chair of ICRP Task Group 95 on Internal Dose Coefficients, from ICRP’s 4th International Symposium on the System of Radiological Protection, October 2017

[http://www.icrp.org/docs/icrp2017/5%20Paquet%20Presentation.pdf Click here for pdf version of presentation]
|}

==See Also==

<div>
<ul mode=nolines>
<li style="display: inline-block; vertical-align: top;">
[[File:ICRPGuide.JPG|thumb|none|100px|link=ICRPædia Guide to Radon|<center>[[ICRPædia Guide to Radon]]</center>]]
</li>

<li style="display: inline-block; vertical-align: top;">
[[File:RadonSeeAlso3.jpg|thumb|none|100px|link=http://www.icrp.org/publication.asp?id=ICRP%20Publication%20115 |
<center>[http://www.icrp.org/publication.asp?id=ICRP%20Publication%20115 ICRP ''Publication 115'' Lung Cancer Risk from Radon and Progeny and Statement on Radon]</center>]]
</li>

<li style="display: inline-block; vertical-align: top;"> [[File:RadonSeeAlso5.jpg|thumb|none|200px|link=http://www.who.int/mediacentre/factsheets/fs291/en/| <center>[http://www.who.int/mediacentre/factsheets/fs291/en/ WHO Factsheet on Indoor Radon]</center>]]
</li>

<li style="display: inline-block; vertical-align: top;">
[[File:RadonSeeAlso2.jpg|thumb|none|200px|link={{filepath:ICRPRadonSummary.pdf}}|<center>[[Media:ICRPRadonSummary.pdf |Expert Summary of ICRP Recommendations on Radon]]</center>]]
</li>

<li style="display: inline-block; vertical-align: top;">
[[File:RadonSeeAlso4.jpg|thumb|none|100px|link=http://www.icrp.org/publication.asp?id=ICRP%20Publication%20126|<center>[http://www.icrp.org/publication.asp?id=ICRP%20Publication%20126 ICRP ''Publication'' 126 Radiological Protection against Radon Exposure]</center>]]
</li>

<li style="display: inline-block; vertical-align: top;">
[[File:RadonSeeAlso6.jpg|thumb|none|150px|link=http://apps.who.int/iris/bitstream/10665/44149/1/9789241547673_eng.pdf|<center>[http://apps.who.int/iris/bitstream/10665/44149/1/9789241547673_eng.pdf WHO Handbook on Indoor Radon]</center>]]
</li>
</ul>
</div>

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icrpaedia>Carr at 18:12, 19 March 2018