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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. 幸せは(きのこ)雲の上に♪ ない‏ @kirakiraryoko 16 Nov 2016
      • Report Tweet
      Replying to @wellerstein @jackiemopsy

      This is because the environmental neutron radiation cannot be completely stopped by shielding.

      1 reply 0 retweets 1 like
    2. Alex Wellerstein‏Verified account @wellerstein 16 Nov 2016
      • Report Tweet
      Replying to @kirakiraryoko

      I am not sure what you are implying the importance of this is?

      1 reply 0 retweets 0 likes
    3. 幸せは(きのこ)雲の上に♪ ない‏ @kirakiraryoko 17 Nov 2016
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      Replying to @wellerstein

      Even 16.6㎏ of natural uranium in the building goes critical after being hit by the environmental neutron radiation. How is HEU?

      5 replies 0 retweets 1 like
    4. Alex Wellerstein‏Verified account @wellerstein 17 Nov 2016
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      Replying to @kirakiraryoko

      I assume you are referring to criticality accident of 1999. This was 18.8% enriched uranium, in water.

      1 reply 0 retweets 0 likes
    5. 幸せは(きのこ)雲の上に♪ ない‏ @kirakiraryoko 20 Nov 2016
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      Replying to @wellerstein

      In 1999 Japan's nuclear accident occurred in a production process of "MOX fuel made from Pu & NU or DU" for FBR Joyo. @wellersteinpic.twitter.com/m7FcSBDCrV

      1 reply 0 retweets 0 likes
    6. Alex Wellerstein‏Verified account @wellerstein 20 Nov 2016
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      Replying to @kirakiraryoko

      What I have read states that accident involved U fuel being prepared for the fast breeder, not MOX: http://world-nuclear.org/information-library/safety-and-security/safety-of-plants/tokaimura-criticality-accident.aspx …

      1 reply 0 retweets 0 likes
    7. 幸せは(きのこ)雲の上に♪ ない‏ @kirakiraryoko 20 Nov 2016
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      Replying to @wellerstein

      "workers were preparing a small batch of fuel for the JOYO", weren't they? JOYO had been FBR developed for using MOX fuel. @wellersteinpic.twitter.com/0UowYzK2jl

      1 reply 0 retweets 0 likes
    8. Alex Wellerstein‏Verified account @wellerstein 20 Nov 2016
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      Replying to @kirakiraryoko

      Reports say U, not MOX. U oxide was unusual for them to use, staff inexperience part of the accident. http://www.nrc.gov/reading-rm/doc-collections/commission/secys/2000/secy2000-0085/attachment1.pdf …

      1 reply 0 retweets 0 likes
    9. 幸せは(きのこ)雲の上に♪ ない‏ @kirakiraryoko 23 Nov 2016
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      Replying to @wellerstein

      It consists of a falsehood reported by Japanese government. There is no need the enriched uranium in Fast Breeder Reactor JOYO.@wellersteinpic.twitter.com/u6Jo5bSxcl

      2 replies 1 retweet 1 like
    10. 幸せは(きのこ)雲の上に♪ ない‏ @kirakiraryoko 23 Nov 2016
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      Replying to @kirakiraryoko

      The nuclear accident in 1999 happened in the process of making Uranyl nitrate solution for MOX fuel of FBR Joyo @wellersteinpic.twitter.com/OHRL7jfBTT

      1 reply 1 retweet 1 like
      Alex Wellerstein‏Verified account @wellerstein 23 Nov 2016
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      Replying to @kirakiraryoko

      There are many reports on the specifics of the accident: http://isis-online.org/isis-reports/detail/what-happened-in-japan-the-criticality-event/ … http://www-ns.iaea.org/downloads/iec/tokaimura-report.pdf …

      4:46 PM - 23 Nov 2016
      1 reply 0 retweets 0 likes
        1. 幸せは(きのこ)雲の上に♪ ない‏ @kirakiraryoko 26 Nov 2016
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          Replying to @wellerstein

          MOX is obtained through Roasting Reduction Method after denitrating Pu- and U-nitrate solution separated from SP and refined. @wellersteinpic.twitter.com/7FDuovC71i

          0 replies 1 retweet 1 like
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