[ RadSafe ] [Non-DoD Source] Re: ] [Radsafe] Caution-news: One worker at Ibaraki facility found with up to 22, 000 becquerels of plutonium in lungs (UNCLASSIFIED)

Thu Jun 8 09:11:48 CDT 2017

Classification: UNCLASSIFIED
Caveats: NONE

All,

I used the online version of the MONDAL3 (http://www.nirs.qst.go.jp/db/anzendb/RPD/mondal3.php).

For an inhalation of Type M (unspecified compounds), one-day after intake, and retention in the lung, I got the following values.

		Retention/Excretion		Committed effective dose per measured activity (Sv/Bq)
0.1micron 		3.01E-01 				3.654E-4
0.3micron 		1.53E-01 				3.856E-4
1 micron 		1.09E-01 				4.312E-4
3 micron 		8.17E-02 				5.018E-4
5 micron 		5.76E-02 				5.556E-4
10micron 		2.64E-02 				7.576E-4

For 5 um and a lung content of 22,000 Bq, the CED is 12.2 Sv.

************
Note about MONDAL3.

"MONDAL3" is a PC based software that will help users to estimate intake of radionuclides inhaled or ingested by workers or by members of the public and resulting committed effective dose based on measurement results of individual monitoring such as in vivo counting or bioassay measurement.
"MONDAL3" is a free software. If you would like to receive it, please send an e-mail to mondal at qst.go.jp"
************

Jerry

__________________________
Gerald A. Falo, Ph.D., CHP
U.S. Army Public Health Center - Health Physics Division   
gerald.a.falo.civ at mail.mil   
gerald.a.falo.civ at mail.smil.mil   
Comm: 410-436-4852
DSN: 584-4852

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Jaro Franta
Sent: Thursday, June 08, 2017 7:37 AM
To: 'The International Radiation Protection (Health Physics) Mailing List'
Subject: [Non-DoD Source] Re: [ RadSafe ] ] [Radsafe] Caution-news: One worker at Ibaraki facility found with up to 22, 000 becquerels of plutonium in lungs

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----

The article states that "The agency estimates that the amount of radiation exposure of the man with the highest level translates to up to 12 sieverts over 50 years."

It doesn't say what that 12 Sv applies to - effective body dose, or dose to a particular organ.

So I looked at some Rad Toolbox calcs for inhalation of 22kBq of Pu239 (slow systemic transfer - 'S' or 'Y' case)

Caution-https://www.dropbox.com/s/u2uxiwr778347tv/22kBq_Pu239_dose_RadToolbox.JPG 

Interesting to compare to Radium dial painters data - where no malignancies were seen below 3700 kBq (0.1mCi) of INGESTED activity.
Ingestion is of course a very different pathway, but Rad Toolbox calculates that, while the bone surface dose is much higher for the Ra226 ingestion case, the effective body dose is similar to inhalation of 22kBq of Pu239.

Caution-https://www.dropbox.com/s/xsav1daxx34zdbm/3700kBq_Ra226_ingestion_dose_RadTo
olbox.JPG 

Caution-https://www.dropbox.com/s/xsk8c7agv5ulney/Radium_dial_painters_graphic.jpg

 Jaro
^^^^^^^^^^^^^^^^^^^^^^^^^

On Wed, Jun 7, 2017 at 4:30 PM, Nick Tsurikov <nick.tsurikov at gmail.com>
wrote:
> Dear all,
> The full article in Japan Today:
>
Caution-https://japantoday.com/category/national/5-workers-suffer-radiation-exposure
-one-with-up-to-22-000-becquerels-of-plutonium-in-his-lungs 
> Kind regards
> Nick
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Classification: UNCLASSIFIED
Caveats: NONE