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  1. #46
    Registered user. Kevin W.'s Avatar
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    Default Re: Radium-painted clock dials a radiation concern? (By: THTanner)

    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  2. #47

    Default Re: Radium-painted clock dials a radiation concern? (By: Kevin W.)

    Quote Originally Posted by Kevin W. View Post
    When trying to get across at school how safe it was to use thoriated welding rod as a source I made the case using BED or Banana Equivalent Dose.

    https://en.wikipedia.org/wiki/Banana_equivalent_dose

    It's not really an equivalent to anything as the body can only hold so much potassium so eating more bananas just means excreting more potassium but it does show how daft some of the objection I had were. (Science is generally over run with Biologists as they are far more common, I didn't have trouble with Chemists and Physicists)
    Nick, lots to learn, late starter.

  3. #48

    Default Re: Radium-painted clock dials a radiation concern? (By: THTanner)

    Quote Originally Posted by THTanner View Post
    Interesting read on Uranium 235 and 238 and their real dangers to man.

    http://www.radioactivity.eu.com/site...um_238_235.htm

    I am on the water board for our community which sits on mostly decomposed granite which contains a fair amount of uranium. Our aquifer flows through the decomposed granite and the uranium. We constantly monitor our water for all the usual and required substances. We are far below the federal standards on all items except two - uranium and alpha particles. On both of those items we are below the standards, but at times, when the aquifer drops, we get close to the limits. When we get close to the standard we send out notices that infants, women who are, or may become pregnant in the near future, and seniors with serious health issues, may wish to obtain drinking water from other sources, but that there is no danger from external contact. The 1/2 life on U238 is 4.5 billion years and of U235 is 700 million years. Given the choice of drinking from glass containing uranium, platinum or lead I would choose uranium. Of course I would choose none of the above given the chance.
    And probably a lot less dangerous than the nuclear testing that used to occur in Nevada?



    RM

  4. #49
    Registered user. THTanner's Avatar
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    Default Re: Radium-painted clock dials a radiation concern? (By: rmarkowitz1_cee4a1)

    Yes - and we are still fighting the nuclear dump plan for Yucca Mountain. Here is an interesting story about all that.

    https://www.youtube.com/watch?v=BlE1BdOAfVc
    You miss 100% of the shots you don't take. - The Great One

  5. #50

    Default Re: Radium-painted clock dials a radiation concern? (By: THTanner)

    I wasn't aware of this piece of history until this piece popped across my facebook newsfeed: https://www.buzzfeed.com/authorkatem...xLv#.ukON4eWmB

    Very sad story, but at least something positive came out of it.

  6. #51
    Registered user. Kevin W.'s Avatar
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    Default Re: Radium-painted clock dials a radiation concern? (By: Gen)

    It still baffles my mind they knew the dangers and still would let someone tell them its ok to shape the pain brush with their mouths.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  7. #52

    Default Re: Radium-painted clock dials a radiation concern? (By: Kevin W.)

    Quote Originally Posted by Kevin W. View Post
    It still baffles my mind they knew the dangers and still would let someone tell them its ok to shape the pain brush with their mouths.
    They always know the dangers, they knew about Lead when they put it in petrol, they knew about smoking, they always know the dangers.
    Nick, lots to learn, late starter.

  8. #53
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    Default Re: Radium-painted clock dials a radiation concern? (By: novicetimekeeper)

    It's all a conspiracy to make everyone die.

  9. #54

    Default Re: Radium-painted clock dials a radiation concern? (By: glenhead)

    They are indifferent to that outcome, it is all about the money. Well documented too, no conspiracy theories here.
    Nick, lots to learn, late starter.

  10. #55
    Moderator leeinv66's Avatar
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    Default Re: Radium-painted clock dials a radiation concern?

    Are we on topic? I think we are drifting well away from the OP's original question.
    Last edited by leeinv66; 05-08-2017 at 06:01 PM.
    Cheers
    Peter R Lee: AKA (Pee-Tah) from Australia

  11. #56

    Default Re: Radium-painted clock dials a radiation concern?

    found this while searching for general seth thomas history/info...


    UNITED STATES NUCLEAR REGULATORY COMMISSION
    WASHINGTON, D.C. 20555-0001


    October 6, 2016


    SUBJECT: SETH THOMAS CLOCK COMPANY – REQUEST FOR INITIAL SITE VISITAND TO PERFORM RADIOLOGICAL SURVEYS



    interesting reading!


    original link: https://www.nrc.gov/docs/ML1627/ML16277A315.pdf

    Attached Thumbnails Attached Thumbnails ML16277A315.pdf  
    i collect antique clocks because i get all that extra time...

  12. #57
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    Default Re: Radium-painted clock dials a radiation concern? (By: bruce linde)

    On wonders why such survey was not conducted sooner?
    Tinker Dwight

  13. #58

    Default Re: Radium-painted clock dials a radiation concern? (By: Tinker Dwight)

    Quote Originally Posted by Tinker Dwight View Post
    On wonders why such survey was not conducted sooner?
    Tinker Dwight
    Well I suppose there is no rush given the half life
    Nick, lots to learn, late starter.

  14. #59
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    Default Re: Radium-painted clock dials a radiation concern? (By: Tinker Dwight)

    Quote Originally Posted by Tinker Dwight View Post
    On wonders why such survey was not conducted sooner?
    Tinker Dwight
    Yes. I was wondering the same.
    Probably other more hazardous areas to first survey.
    Denver had a problem which was corrected by entombing in a mimi-mountain of soil, I recall.
    That radiation has affected my mind. Can't remember the details.
    Confucius say: "Man own clock know time. Own two, never sure."

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