[ RadSafe ] Risk Communication

Fri May 10 17:51:00 CDT 2013

________________________________
From: Steve Schulin <steve.schulin at nuclear.com>
To: The International Radiation Protection (Health Physics) Mailing List 
<radsafe at health.phys.iit.edu>
Sent: Fri, May 10, 2013 3:43:46 PM
Subject: Re: [ RadSafe ] Risk Communication

Hi Jaro, and all. One reason I don't support use of PARS is because such devices 
can actually increase the likelihood of a hydrogen explosion in a beyond design 
basis accident. See "passive autocatalytic recombiners could act as hydrogen 
igniters in beyond design basis accident" at 
http://news.nuclear.com/blog7.php/indian-point-2-passive-autocatalytic

I'm also not so keen to put filters on the hardened vents. The safety function 
of the vents is so important that it seems unwise to risk clogging up the vent 
path. I'm no engineer, but as a radiation protection technician, and as a 
homeowner, it it has been my experience that filters clog.This concern about 
filter-clogging was raised in at least one of the post-Fukushima ACRS meetings 
(NRC's Advisory Committee on Reactor Safeguards) where the filtered vent issue 
was discussed, but I haven't noticed any studies or reports on the subject.

As to contributors to public outrage, I'd rank several items as of much greater 
significance than the explosions. The admission by TEPCO that they purposefully 
did not improve tsunami protection to guard against increased max credible 
tsunami height is one example. That the reasoning included not wanting to alarm 
the public was an especially egregious aspect of this, and I see this raised in 
many more recent newspaper pieces than the explosions.

Very truly yours,

NUCLEAR.COM

Steve Schulin, Founding Editor
http://www.nuclear.com
info at nuclear.com
301-433-4211

http://www.linkedin.com/in/nuclearcom
http://twitter.com/nuclearcom
http://facebook.com/nuclearcom

On May 10, 2013, at 5:36 PM, Jaro Franta wrote:

> Thanks for the link.
> 
> It seems to me that a very big part of the "Outrage" following Fukushima
> came from the public seeing images of one reactor after another blowing up.
> 
> Does anyone dispute that assertion ?
> 
> Anyway, a fairly easy and relatively inexpensive way to combat that specific
> outrage is to make sure that NPPs subject to total station blackout do not
> blow up, because of hydrogen accumulation.
> Now why on earth is the US nuclear industry dragging its feet on
> installation of Passive Autocatalytic hydrogen Recombiners (PARs), while
> everyone else around the world is installing them, is totally beyond me.
> 
> Similarly for containment venting filters.
> 
> How about some leadership for a change ?
> 
> 
> Jaro Franta
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> 
> 
> 
> 
> -----Original Message-----
> From: radsafe-bounces at health.phys.iit.edu
> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Miller, Mark L
> Sent: May-10-13 12:59 PM
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> (LANL); White, Robin S
> Subject: [ RadSafe ] Risk Communication
> 
> 
> http://ansnuclearcafe.org/2013/05/07/outrage-management-calming-people-conce
> rned-about-low-risks/
> 
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