Re: How many mR/hr are Harmful ?
> Estimates average for general public in the US is 365 mRem fromnot
> background, natural sources, fallout, medical use, etc. (this is
> true for you CDV'ers who keep hot items in you house)These numbers should be read as mRem per year.....
> The average badged radiation worker in the US might receive an
> additional 300 mRem from their occupation.
supporting material = video "Radiation Safety and Common Sense"
written and presented by John W. Duley.. Radiological Training
Services, P.O. Box 288, 6538 Koziara Drive, Burke, Virginia 22015
there are quite a few places in my last posting that are supported by
Mr. Duley tape series.... so I guess I owe him a plug.... I highly
recommend his three tapes on Basic Training for Radiation..(do cost
$$) Instead of myself spending 6-8 hours training new hires in basic
radiation concepts, I let them watch three of John Duleys tapes and
take a quiz I made for each tape to verify comprehension.
Get the tapes from Mr. Duley. Email me if you want the quizzes...
- Hi Nukenook, im always readings the Cdv-700 forum!
I know the Fiesta dinnerware, i discovered it this summer on Internet
Site,but don't exist Out of Usa.A photo show the readings of a geiger
counter give about 3 mR/hr.I don't like to eat inside
Im thinking to winning an Ebay Auction for fiestaware but im just
waiting an CDV700 won hope will arrive to me without problem for
the "check source" why have so strong source?
Also i have see the marvel effects of Uranium Glass (or Vaseline
Glass) myself,with very old Glass using a backlight (Called here in
Italy Wood's Light).The geiger counter don't "see" the item
radioactive i think for very low quantity of Uranium inside.
Im always hunting around to found something of "cool" ehm hot! ;-)
- Hi Jim ! Many thanks for write me the numbers of exposition.
Make this example :
My Father have an very old Rolex watch with Radio Painted dials.
On the dial face my Geiger show 3 mR/hr, but on the other side only
0.3 mR/hr x 8 hours and x 365 days = 876 mRem.
The limits for hands you writed are 50,000 mRem for years , and a
watch are only 876, so remain 49,124 mRem are correct ?
If so are right my father can wear others 57 watch at same time heheh.
Here in Italy i don't found nothing to help me, so i'll accept the
Americans dose Level ;-))
- --- In CDV700CLUB@egroups.com, dax@l... wrote:
> Hi Jim ! Many thanks for write me the numbers of exposition.heheh.
> Make this example :
> My Father have an very old Rolex watch with Radio Painted dials.
> On the dial face my Geiger show 3 mR/hr, but on the other side only
> 0.3 mR/hr.
> 0.3 mR/hr x 8 hours and x 365 days = 876 mRem.
> The limits for hands you writed are 50,000 mRem for years , and a
> watch are only 876, so remain 49,124 mRem are correct ?
> If so are right my father can wear others 57 watch at same time
>off course your dad probably wears his watch 16 hours a day only
> Here in Italy i don't found nothing to help me, so i'll accept the
> Americans dose Level ;-))
taking it off to go to bed and shower.... so he might get 1752
mRem/yr. then again this is NOT occupational dose and the US NRC
doesn't care about none occupation dose. Maybe he can wear 28 more
watches 16 hours each day!!!!
- Hi, Jim-interested in more info on your quiz. This shop does a great deal of
training during the course of a year and I'm always on the lookout for a
better mouse trap. Perhaps we could trade training goodies.
Nukenook the inquisitive
- Howdy, Davide! My father had a watch that was issued to him by the Army in
1943 and he wore it every day until it went west sometime in the mid-70's.
With a Vic 700 that dude cranks roughly 10 mR/hr (and still does-I use it for
The joke around our house was that it is a wonder that my brother and I
weren't born with tails or two heads, or something...
I should mention that this shop uses Cs137 for calibration of survey
instruments. Iowa prohibits the possession of any form of Radium by
unlicensed users with one glaring exception-illuminated dial faces.
- --- In CDV700CLUB@egroups.com, "Jim Kostka" <jkostka@j...> wrote:
> radiation concepts, I let them watch three of John Duleys tapes and
> take a quiz I made for each tape to verify comprehension.
> Get the tapes from Mr. Duley. Email me if you want the quizzes...
> jim kostka
Would you mind sending me a copy of your quizes?
Rob Hooper, CSP
Anyone know anything about the calibration sources that used to be included
with the AN/PDR-27F Radiac Set that the Navy issued around 1953? The manual
says that the "Radioactive Test Sample consists of a five-inch long, 13/32
inch diameter plastic tube containing 7 micrograms of Radium". The manual
further warns that "serious skin and internal burns may result if the test
sample is held close to the skin for prolonged periods".
The guy that I bought my Radiac set from told me that the Navy pulled these
plastic "straws" out of most of the radiac sets before de-commissioning
them. The part number for the sample is MX1083B/PDR-27 and the Navy stock
number is F16-C-14241-1210. My radiac set didn't have one and I have never
encountered anyone who has one of these calibration samples.
Does anyone among our group own one of these samples? Is it really that
dangerous to have a 7-microgram sample of Ra-226? I thought that smoke
detectors contained an amount of Americium equivalent to 1 microgram.
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- Ah, the ways of the government are marvelous to behold!
The government has been quite precise in designating PDR-27 components, e.g.
MX-1083B contains 7 micro-grams of Ra-226
MX-1083C contains 7 micro-curies of Ra-226
MX-7738 contains 5 milli-curies of Kr-85
but heaven forbid any of the surplus material should be sold to an American citizen. Foreigners, however, are a different matter. Equipment provided to our allies, of course, is no longer under such strict control and thus the radioactive sources were not necessarily removed when they surplussed the equipment. Find a foreign surplus supplier as the most likely source for a U.S. made source!! They are out there - - - to paraphrase a popular TV show slogan!
A similar situation exists for War Airplanes. A citizen cannot purchase one in this country; however, nothing prevents him from purchasing one abroad, if available. I belong to a professional society for Aeronautics and Astronautics which has a quite well-to-do member who collects WWII bombers, such as a B-24, a B-17, a B-29 etc. Such planes all had to be purchased, mostly in parts, from foreign allies. He then was able to reassemble them back here without any problem. I suppose this does reduce the probability that any Joe Schmoe can quickly buy a bomber and make a run on the government. It's probably easier to buy nuclear weapons on the international black market!
- The army also used the AN/PDR27 (never even painted over the Navy gray).
Some years ago when I was still in the word went out to pull all test probes
because some of the early probes were simply painted with radium paint, while
later ones had a glass ampule which was extremely subject to breakage. There
are some real horror stories out there about those old probes.
Nukenook the Retired
- Hope our buddy in Italy gets to see the Davis-Montham airplane park outside
of Tuscon(?). While stationed at Fort Huachuca one way to enjoyably waste a
weekend was to drive past all those wonderful rows of aircraft...P-51
Mustangs next to B-57's next to B-25's next to...God, it was great!!
- --- In CDV700CLUB@egroups.com, nukenook@a... wrote:
> Hope our buddy in Italy gets to see the Davis-Montham airplane parkoutside
> of Tuscon(?). While stationed at Fort Huachuca one way toenjoyably waste a
> weekend was to drive past all those wonderful rows of aircraft...P-51
> Mustangs next to B-57's next to B-25's next to...God, it was great!!I dont' know this place (Davis Montham ??) in Tuscon (Toscana?).
Toscana is "near" Lazio Region,but i live in Rome.
- Forgive me, Davide. I was referring to a US Airforce base in the state of
Arizona, east of the city of Tucson which is in the southern part of the
If you have any interest in aviation, this is a wonderful place due to the
vast number of old (and not so old) US military aircraft lined up in row
after row. You can see rows of B-52 bombers lined up next to rows of old
B-25 bombers lined up next to rows of P-51 Mustang fighter aircraft, ad
infinitum. Almost better than the Smithsonian in Washington, D.C. (although
really nothing can beat the Smithsonian for it's wealth of exhibits-the only
drawback is that you have to fight your way to the front door through hordes
of man-eating lawyers/lobbyists...). Enjoy your trip!!
- --- In CDV700CLUB@egroups.com, nukenook@a... wrote:
> Forgive me, Davide. I was referring to a US Airforce base in thestate of
> Arizona, east of the city of Tucson which is in the southern partof the
> state.to the
> If you have any interest in aviation, this is a wonderful place due
> vast number of old (and not so old) US military aircraft lined upin row
> after row. You can see rows of B-52 bombers lined up next to rowsof old
> B-25 bombers lined up next to rows of P-51 Mustang fighteraircraft, ad
> infinitum. Almost better than the Smithsonian in Washington, D.C.(although
> really nothing can beat the Smithsonian for it's wealth of exhibits-the only
> drawback is that you have to fight your way to the front doorthrough hordes
> of man-eating lawyers/lobbyists...). Enjoy your trip!!Okey!,my brother have interest in aviation because he was studing to
be an Pilot.
See you soon,