[ RadSafe ] NRC Press Release and suggested PAGs

Jeff Terry terryj at iit.edu
Wed Mar 16 19:38:57 CDT 2011

I believe that they said that Gregory Jaczko in his press conference said that they did not have good info on the age of the fuel or the type of fuel. 

I would have to guess that they went with worse case. It would be hard to fault them for that when suggesting that US citizens should evacuate to 50 miles. 

That said there is no excuse for the NRC to not release the approximations made in the calculation. 


On Mar 16, 2011, at 7:34 PM, John Ahlquist wrote:

> As others have stated it would be nice to know the assumptions behind these 
> calculations.  I'm surprised that the NRC did not include them or at least have 
> a reference to them.  We know nothing about the source term, the plume height, 
> the age of the fuel, the type of fuel [MOX?], time of release post shut down, 
> etc.  Otherwise, I don't know what to make of these numbers.   Should I use them 
> for decision making or not?  We need to understand the numbers to make good 
> decisions.  The Japanese people have been traumatized a lot. We don't need to 
> throw more confusion into this serious situation.
> I would encourage anyone from NRC who reads this list to provide some more 
> information.
> John Ahlquist
> former member of the Radiological Assessment Branch
> From: "Egidi, Phil" <Phil.Egidi at dphe.state.co.us>
> To: The International Radiation Protection (Health Physics) Mailing List 
> <radsafe at health.phys.iit.edu>
> Sent: Wed, March 16, 2011 12:58:35 PM
> Subject: [ RadSafe ] NRC Press Release and suggested PAGs
> It is suggested one look at the most recent NRC press release and
> accompanying 
> modeling with respect to suggested PAGS for US Citizens in Japan.  The
> numerical 
> values postulated are sobering...
> http://www.nrc.gov/reading-rm/doc-collections/news/2011/11-050_Attchmt.pdf 
> http://www.nrc.gov/reading-rm/doc-collections/news/2011/11-050.pdf 
> Phil Egidi
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