A correlation between quasiperiodic variations in 239Pu alpha-activity and geophysical periods was revealed.
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In air filter assay for radiological emergency response, radon (Rn) and thoron (Rn) progeny are known interferents to transuranic activity estimation. Previous work detailed a conservative, graded approach for TRU alpha activity estimation from air samples void of transuranic activity yet containing varying amounts of radon and thoron progeny. Validation of this method to produce rapid, conservative and defensible transuranic alpha activity estimates was accomplished through introduction of surrogate transuranic activity, Pu and Th check sources, along with the naturally occurring radioactive progeny from an environmental air filter.
View Article and Find Full Text PDFMicrodistribution and long-term retention of 239Pu (NO3)4 in the respiratory tracts of an acutely exposed plutonium worker and experimental beagle dogs.
Cancer Res
November 2012
Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
The long-term retention of inhaled soluble forms of plutonium raises concerns as to the potential health effects in persons working in nuclear energy or the nuclear weapons program. The distributions of long-term retained inhaled plutonium-nitrate [(239)Pu (NO(3))(4)] deposited in the lungs of an accidentally exposed nuclear worker (Human Case 0269) and in the lungs of experimentally exposed beagle dogs with varying initial lung depositions were determined via autoradiographs of selected histologic lung, lymph node, trachea, and nasal turbinate tissue sections. These studies showed that both the human and dogs had a nonuniform distribution of plutonium throughout the lung tissue.
View Article and Find Full Text PDF240Pu/239Pu mass ratio in environmental samples in Finland.
J Environ Radioact
November 2012
Laboratory of Radiochemistry, Department of Chemistry, P.O. Box 55, 00014 University of Helsinki, Finland.
The (240)Pu/(239)Pu mass ratio was determined with SF-ICP-MS in lichen, peat, grass, air filter, and hot particle samples obtained in Finland. The main part of the air filters were sampled in northern Finland in 1963, whereas all the other samples were collected in southern and central Finland immediately after the Chernobyl accident in 1986. The (240)Pu/(239)Pu mass ratio varied between 0.
View Article and Find Full Text PDFDetermination of plutonium content in high burnup pressurized water reactor fuel samples and its use for isotope correlations for isotopic composition of plutonium.
Appl Radiat Isot
June 2012
Korea Atomic Energy Research Institute, Yuseong, Daejeon, Republic of Korea.
The content of plutonium isotopes in high burnup pressurized water reactor fuel samples was examined using both alpha spectrometry and mass spectrometry after anion exchange separation. The measured values were compared with results calculated by the ORIGEN-2 code. On average, the ratios (m/c) of the measured values (m) over the calculated values (c) were 1.
View Article and Find Full Text PDFIsotope correlations for determining the isotopic composition of plutonium in high burnup pressurized water reactor (PWR) samples.
Appl Radiat Isot
March 2010
Korea Atomic Energy Research Institute, Yusung, Daejeon, Republic of Korea.
Correlations among the alpha activity ratios of (238)Pu/((239)Pu+(240)Pu), the alpha specific activities of Pu and the atom % abundances of Pu isotopes were derived for the plutonium samples obtained from high burnup fuel samples from pressurized water reactors. Using the alpha activity ratios of (238)Pu/((239)Pu+(240)Pu) determined by alpha spectrometry, the alpha specific activities of Pu as well as the atom % abundances of the plutonium isotopes in the unknown samples were calculated without depending on mass spectrometry. The calculated alpha specific activities of Pu agreed with those determined by experiment within 2%, and the atom % abundances of the Pu isotopes agreed within 4% for (238)Pu, 5% for (239)Pu, 7% for (240)Pu and 5% for (242)Pu, respectively.
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