Re: Dose to fog camera film

[Rahim Ghanooni <rahim@inav.net>]

John :

I used to work at mid-energy  research accelerator (MIT) for few years. At
the various location of the tunnel we had TV camera for observation of the
"targets". The typical dose rate was about 200 mrem/hr neutron and 700 mr/hr
gamma. The lens would turned to light brown after one months of continues
bombardment by electrons at the above exposure. 

Hope this will give you a good idea of what to expect. 

At 11:51 AM 2/24/97 -0600, you wrote:
>What gamma dose would be required to fog regular camera film?
>A reference for the info would also be nice, but it's not critical.
>
>If anyone knows, please let me know ASAP by e-mail (jmoulder@its.mcw.edu) -- 
>you may wish to reply to the list also, but I get RadSafe by digest, and I 
>need the info ASAP.  
>
>Why do I need this?
>
>As some of you are aware, there are people who believe that there is a 
>conspiracy to conceal the magnitude of the population radiation dose received 
>from the TMI accident (e.g., NPR this morning).  Specifically, they argue that 
>the doses were high enough to cause acute radiation injuries and/or a 
>detectable excess in cancer.
>
>Arguing against conspiracy theories is rather tricky, since the person doing 
>the argument is de facto a member of the conspiracy, and because absence of 
>evidence to support the conspiracy is evidence of the effectiveness of the 
>conspiracy.
>
>One way to argue is via the number of people who would have to be in the 
>conspiracy.  So, if the TMI doses was high enough to cause acute effects (200+ 
>rem) or a detectable increase in cancer (25+ rem) over in a significant number 
>of people (meaning doses over a distance of a least 2 miles), who would have 
>detected it?
>1)  Anyone with a film badge (i.e., any hospital) within 50? miles
>2)  Anyone with a survey meter within 100? miles
>3)  Anyone with a camera within _____? miles.
>
>
>
>
>
>
>John Moulder (jmoulder@its.mcw.edu)
>Radiation Biology Group
>Medical College of Wisconsin
>
>
Mr. Rahim Ghanooni
Sr. Health Physicist
Certified Hazardous Material Manager (CHMM)
319-851-7133 Tel
319-851-7626 Fax
rahim@inav.net
My opinion only