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RE: Water Irradiation?



Dave,

Unless they sampled and cultured the organism we will not know.  There are a

number of organisms that can resist harsh environments, besides radiation.

In food irradiation, doses into the kGy range have to be used.  To reduce to

90% of the E.coli in beef at 5 degrees C requires 0.3 kGy or 30 krad.  And

there are still survivors.

  

-- John 



-----Original Message-----

From: Neil, David M [mailto:neildm@id.doe.gov]

Sent: Wednesday, July 10, 2002 12:29 PM

To: Jacobus, John (OD/ORS); 'Franta, Jaroslav'; Radsafe (E-mail)

Subject: RE: Water Irradiation?





Maybe you're referring to _Deinococcus_radiodurans_ (?) that is quite

radiation resistant.



 http://www.pnl.gov/er_news/08_98/art2.htm



Dave Neil

neildm@id.doe.gov



-----Original Message-----

From: Jacobus, John (OD/ORS) [mailto:jacobusj@ors.od.nih.gov]

Sent: Wednesday, July 10, 2002 8:27 AM

To: 'Franta, Jaroslav'; Radsafe (E-mail)

Subject: RE: Water Irradiation?





Jaro,

I think I remember hearing that some spend fuel pools were contaminated with

bacteria.  Does any one who works in nuclear power on this list recall this?

-- John 



John Jacobus, MS

Certified Health Physicist

3050 Traymore Lane

Bowie, MD  20715-2024



E-mail:  jenday1@email.msn.com (H)      

-----Original Message-----

From: Franta, Jaroslav [mailto:frantaj@AECL.CA]

Sent: Wednesday, July 10, 2002 8:52 AM

To: Radsafe (E-mail)

Subject: RE: Water Irradiation?



. . .



I've pondered before on this question - could we use spent fuel as a gamma

source for irradiating water?  Piping networks that pass in between spent

bundles in the used fuel pool.  The water would be at normal pumping

pressure (say 200 kPa) so any leaks would be out of the tubes and into the

fuel bay.



. . .

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