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wellerstein's profile
Alex Wellerstein
Alex Wellerstein
Alex Wellerstein
Verified account
@wellerstein

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Alex WellersteinVerified account

@wellerstein

Historian of science, secrecy, and nuclear weapons. Professor of STS at @FollowStevens. UC Berkeley alum with a Harvard PhD. NUKEMAP creator. Coder and web dev.

Hoboken, NJ / NYC
blog.nuclearsecrecy.com
Joined September 2011

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    1. Stephen Young‏ @StephenUCS 8 Sep 2015
      • Report Tweet

      Stephen Young Retweeted AndyWeberNCB

      "The plutonium behind that flash [in the 1st nuclear test] is estimated at one gram – the weight of a dollar bill."https://twitter.com/AndyWeberNCB/status/641032786304991232 …

      Stephen Young added,

      AndyWeberNCB @AndyWeberNCB
      Great @nytimes article by @WilliamJBroad shows #IranDeal kills Pu pathway: Iran’s Unsung Plutonium Concession http://nyti.ms/1M6H1ht 
      1 reply 0 retweets 0 likes
    2. Pavel Podvig‏ @russianforces 8 Sep 2015
      • Report Tweet
      Replying to @StephenUCS

      @StephenUCS It's wrong - about 1kg of Pu fissioned http://blog.nuclearsecrecy.com/2013/12/23/kilotons-per-kilogram/@WilliamJBroad …

      1 reply 0 retweets 0 likes
    3. Stephen Young‏ @StephenUCS 8 Sep 2015
      • Report Tweet
      Replying to @russianforces

      @russianforces I posted it b/c it was so shocking, but can't testify to it. But the link you posted doesn't work for me. @wellerstein?

      3 replies 0 retweets 0 likes
    4. Alex Wellerstein‏Verified account @wellerstein 8 Sep 2015
      • Report Tweet
      Replying to @StephenUCS

      @StephenUCS @russianforces The "weight of a 1 dollar bill" is the amount of mass converted to energy, not the amount of actual Pu fissioned.

      1 reply 0 retweets 2 likes
    5. Pavel Podvig‏ @russianforces 8 Sep 2015
      • Report Tweet
      Replying to @wellerstein

      @wellerstein @StephenUCS That's a good way of thinking about it. The way it was said in the article is rather misleading

      2 replies 0 retweets 0 likes
    6. Alex Wellerstein‏Verified account @wellerstein 8 Sep 2015
      • Report Tweet
      Replying to @russianforces

      @russianforces @StephenUCS I think the last part of the paragraph in question is an editing mistake.

      1 reply 0 retweets 0 likes
    7. Pavel Podvig‏ @russianforces 8 Sep 2015
      • Report Tweet
      Replying to @wellerstein

      @wellerstein @StephenUCS Schlosser made the same mistake in Command and Control

      6 replies 0 retweets 0 likes
    8. Alex Wellerstein‏Verified account @wellerstein 8 Sep 2015
      • Report Tweet
      Replying to @russianforces

      @russianforces @StephenUCS My copy of Schlosser has it right — he distinguishes between what fissions and what converts into energy.

      1 reply 0 retweets 0 likes
    9. Pavel Podvig‏ @russianforces 8 Sep 2015
      • Report Tweet
      Replying to @wellerstein

      @wellerstein Schlosser (first?) made the dollar bill comparison. Maybe technically correct, but ratherl misleading @StephenUCS

      1 reply 0 retweets 0 likes
    10. Stephen Young‏ @StephenUCS 8 Sep 2015
      • Report Tweet
      Replying to @russianforces

      @russianforces @wellerstein Just noted that @WilliamJBroad cites John McPhee for the gram figure https://books.google.com/books?id=qVmZWWqrO5IC&pg=PT132&dq=%22when+Fat+Man+exploded+over+Nagasaki+the+amount+of+matter+that+changed+into+energy+and+destroyed+the+city+was+one+gram%22&hl=en&sa=X&ved=0CCAQ6AEwAGoVChMI0rTa-OrYxwIVk-uACh2d3gvY#v=onepage&q=%22when%20Fat%20Man%20exploded%20over%20Nagasaki%20the%20amount%20of%20matter%20that%20changed%20into%20energy%20and%20destroyed%20the%20city%20was%20one%20gram%22&f=false …

      3 replies 0 retweets 0 likes
      Alex Wellerstein‏Verified account @wellerstein 8 Sep 2015
      • Report Tweet
      Replying to @StephenUCS

      @StephenUCS @russianforces @WilliamJBroad Another way to think about it: fissioning atoms convert about 1/1000th of their mass into energy.

      8:36 AM - 8 Sep 2015
      1 reply 0 retweets 0 likes
        1. New conversation
        1. Pavel Podvig‏ @russianforces 8 Sep 2015
          • Report Tweet
          Replying to @wellerstein

          @wellerstein Not sure it's helpful. There is no mass that is converted to energy. What's mass and energy anyway? @StephenUCS @WilliamJBroad

          2 replies 0 retweets 0 likes
        2. Alex Wellerstein‏Verified account @wellerstein 8 Sep 2015
          • Report Tweet
          Replying to @russianforces

          @russianforces @StephenUCS @WilliamJBroad Well, the products weigh less than the initial configuration (missing mass and all that).

          0 replies 0 retweets 0 likes
          3. End of conversation

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