Re: Tungsten

["Luc" <ludev-at-xxxxxxxxxxxx> (by way of Terry Fritz <twftesla-at-xxxxxxxxxx>)]

 Hi all 

Just some link: tungsten is not a good stuff to breath too. Make the decision
by yourself in the way you protect yourself. Spark gap produce tungsten
particle and tungsten oxide. I'm sure the level of contaminant is low because
we use tungsten especially for it resistance to arc. 

<http://wildfowl-dot-net/tung2.html>http://wildfowl-dot-net/tung2.html 

 http://www.fishersci.ca/msds.nsf/96cb2019dad1311a85256670001d92b9/10ef8e5d
7f36010f852566f100101170?OpenDocument 

 <http://www.fishersci.ca/msds.nsf/96cb2019dad1311a85256670001d92b9/3dbfb23
72733aa7d852566f1001010c2?OpenDocument>http://www.fishersci.ca/msds.nsf/96c
b2019dad1311a85256670001d92b9/3dbfb2372733aa7d852566f1001010c2?OpenDocument 
  

Luc Benard 
  

Tesla list wrote: 
>
> Original poster: "David Trimmell" <davidt-at-pond-dot-net> 
>
> Actually it (Thorium 232) is a Alpha emitter (decay, but does emit a small 
> amount of low energy Gamma), it has a low Specific Activity: 1.5e-3 Ci/g, 
> or 1.6e7 disintegrations per second/gram. I found that any pancake type GM 
> probe will detect the activity, about 40 to 80 Counts per minute above 
> background (assuming 10% efficiency, 2pi geo, <60 cpm background) from a 
> couple rods at <0.5 inch. In the short: someone making a couple or three 
> RSG will not expose them selves to a long-term harmful amount of Ionizing 
> radiation, BUT, anyone doing this on a ongoing basis (manufacturing and 
> selling RSG) should take very stringent exposure precautions, not only from 
> the radioactive constituents, but also from the metal dusts. 
>
> Regards, 
>
> David Trimmell 
> www.ChaoticUniverse-dot-com 
>
> At 03:33 PM 11/3/00, you wrote: 
> >Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 
> ><snip> 
> > 
> >Thorium is a beta emitter... Goes right through the plastic bag holding the 
> >mantle.. 
> > 
> >There is a company making special TIG electrode grinders with filters, etc. 
> >just to accomodate those who fear the 2% thorium.  As a practical matter, 
> >you don't get much exposure (laying the electrode right on the window of my 
> >geiger counter doesn't even raise the background count).  Thorium isn't 
> >particularly active (i.e. it has a long half life, and you need a lot of 
> >thorium to get a decent disintegration rate).  You probably get more 
> >exposure from the radium and uranium in granite, or from the potassium 40 
> >in the body of the dog, cat, or spouse sharing your bed. 
> > 
> > > 
> msnip...