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  • 1 Lawrence Livermore National Laboratory Health and Ecological Assessment Division 94551-9900 Livermore CA USA
  • 2 P.O. Box 2403 94550 Livermore CA USA
  • 3 13749 Moonlight Lane 96003 Redding CA USA
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There continue to be reports in the literature that suggest a difference in the behavior of239+240Pu and238Pu in some aquatic environments. Plutonium isotopes have been measured in marine samples collected over 3 decades from Enewetak atoll, one of the sites in the Marshall Islands used by the United States between 1946 and 1958 to test nuclear devices. The plutonium isotopes originated from a variety of complex sources and could possibly coexist in this environment as different physical-chemical species. However results indicate little difference in the mobility and biological availability of239+240Pu and238Pu.