[ RadSafe ] [EXTERNAL] Bq/kg soil

[Brennan, Mike (DOH)]

RESRAD is OK, but you NEED to understand your scenario, and make sure
the assumptions that go into it are reasonable.  RESRAD will happily
allow scenarios that have little connection with reality.  

If you are plugging in a bunch of isotopes quantified through gamma
spec, make sure you leave out K40.  In many soils (and water, for that
matter) K40 may be the isotope with the highest activity, but it
actually does not contribute any actual dose through ingestion pathways
(because the body regulates potassium so well) and if there is enough
K40 in the soil for significant external dose, you aren't farming it.

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Wasiolek,
Maryla
Sent: Monday, December 05, 2011 1:47 PM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: Re: [ RadSafe ] [EXTERNAL] Bq/kg soil

Activity concentration in the soil gets converted to doses by using the
environmental transport and exposure models.  ResRad
(http://web.ead.anl.gov/resrad/home2/) is a good example of software
that uses such model.

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Karen Street
Sent: Monday, December 05, 2011 2:31 PM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: [EXTERNAL] [ RadSafe ] Bq/kg soil

I see Japan has a standard of 5,000 Bq/kg soil, and that a sizable
amount of acreage is affected.

What are the standards of other countries, and how the heck does this
get converted into mmSv, assuming this is agricultural land?

I assume there is variation by crop.

What do I not know? 
--
Best wishes, 
Karen Street
Friends Energy Project
blog http://pathsoflight.us/musing/index.php

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