What has happened to the survivors of the early Los Alamos nuclear accidents

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Two nuclear accidents involving a plutonium sphere just subcritical in size occurred at the Los Alamos Laboratory, LA-1 in 1945 and LA-2 in 1946. Because remote control devices were deemed unreliable at the time, the tamper material (tungsten carbide bricks in LA-1 and beryllium hemispheres in LA-2) was added by hand with the operator standing next to the assembly. In each case the critical size of the assembly was accidentally exceeded and the resultant exponentially increasing chain reaction emitted a burst of neutrons and gamma rays. Ten persons were exposed to the radiation bursts which were largely composed of neutrons. ... continued below

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Pages: 33

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Hempelman, L.H.; Lushbaugh, C.C. & Voelz, G.L. January 1, 1979.

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Description

Two nuclear accidents involving a plutonium sphere just subcritical in size occurred at the Los Alamos Laboratory, LA-1 in 1945 and LA-2 in 1946. Because remote control devices were deemed unreliable at the time, the tamper material (tungsten carbide bricks in LA-1 and beryllium hemispheres in LA-2) was added by hand with the operator standing next to the assembly. In each case the critical size of the assembly was accidentally exceeded and the resultant exponentially increasing chain reaction emitted a burst of neutrons and gamma rays. Ten persons were exposed to the radiation bursts which were largely composed of neutrons. The doses ranged from fatal in the case of the two operators, to small in the case of some survivors. The two operators died within weeks as a result of acute radiation injury. Only six of the eight survivors were available for follow-up study ten or more years after the accident. Four of these six survivors are now dead, but the two living survivors are in excellent health with no clinical or laboratory evidence of late radiation injury. Two of the deceased died of acute myelogenous leukemia, another died at age 83 of refractory anemia, and the fourth of myocardial infarction. The heart attack could have been precipitated by the myxedema assumed to have been the result of the radiation exposure.

Physical Description

Pages: 33

Notes

Dep. NTIS, PC A03/MF A01.

Source

  • Radiation accident preparedness conference, Oak Ridge, TN, USA, 19 Oct 1979

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  • Report No.: LA-UR-79-2802
  • Report No.: CONF-791085-1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5702327
  • Archival Resource Key: ark:/67531/metadc1093988

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1979

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • June 1, 2018, 12:01 p.m.

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Hempelman, L.H.; Lushbaugh, C.C. & Voelz, G.L. What has happened to the survivors of the early Los Alamos nuclear accidents, article, January 1, 1979; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1093988/: accessed March 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.