Anomalous concentrations of atmospheric plutonium-238 over Paris

Martin, Jean‐Marie; Thomas, Alain

doi:10.1016/0265-931x(88)90038-0

Cited by 13 publications

(2 citation statements)

References 26 publications

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“…The IR measured nowadays suggest an unknown source of 238 Pu in the Seine river. As a matter of fact, undetermined 238 Pu excesses (IR = 25.3 and 1.05) were observed occasionally in 1982 and 1983 over Paris [6].…”

Section: Results and Interpretationmentioning

confidence: 93%

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Multiparametric Investigation of the Reactions of Plutonium under Estuarine Conditions

Garcia¹,

Boust²,

Moulin

et al. 1996

Radiochimica Acta

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Several sampling campaigns were carried out in the Seine estuary in order to study the behaviour of plutonium isotopes versus salinity ( 23 "Pu and 239 ' 240 Pu), in 0.45 μηι filtered waters. During estuarine mixing, the plutonium has a non-conservative behaviour: plots of Pu activities versus salinity display an excess of dissolved 238 Pu (RI = «"p u / 2! " 4°P u > 1) in low salinity waters (0.5 and 1.5 g Γ 1 ) and a depletion (RI < 1) in the zone of intermediate salinities (8 to 15 g Γ')> with respect to conservative dilution.Laboratory experiments showed that Pu(V) present in seawater is reduced to the III, IV states and sorbed onto particles with a maximum in low salinity waters which could explain the depletion observed at intermediate salinity in the Seine estuary. Reduction occurs prior to sorption and is connected with the Seine river colloidal and dissolved species (humic acids). The Pu associated with estuarine sediments desorbs from the "oxidehydroxide" fraction in contact with river water, thus partly explains the plutonium excess measured in low salinity filtered waters of the Seine.

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Section: Results and Interpretationmentioning

confidence: 93%

“…The latter is characteristic of the Atlantic waters and of most of river waters. However, a few studies show that the plutonium level in the Seine river is higher than should be expected with respect to atmospheric fallout [6].…”

Section: Introductionmentioning

confidence: 98%

Multiparametric Investigation of the Reactions of Plutonium under Estuarine Conditions

Garcia¹,

Boust²,

Moulin

et al. 1996

Radiochimica Acta

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Environmental radiochemistry and radioactivity

Bujdosó¹

1990

Journal of Radioanalytical and Nuclear Chemistry, Articles

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Anomalous90Sr deposition during the fall, 1995 at MRI, Tsukuba, Japan

Igarashi¹,

Aoyama²,

Miyao³

et al. 1999

J Radioanal Nucl Chem

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We have observed an anomalous 9~ deposition at the Meteorological Research Institute (MR1), Tsukuba, Japan during the fall of 1995. This anomalous 9~ deposition was confirmed by the re-analysis of the sample, the associated lowest 137Cs/9~ activity ratio and high r/s ratio, etc. We discuss the cause of this anomalous 9~ deposition and conclude that the anomalous 9~ may come from an accidental release of nuclear battery, etc,

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Anomalous concentrations of atmospheric plutonium-238 over Paris

Cited by 13 publications

References 26 publications

Multiparametric Investigation of the Reactions of Plutonium under Estuarine Conditions

Multiparametric Investigation of the Reactions of Plutonium under Estuarine Conditions

Environmental radiochemistry and radioactivity

Anomalous90Sr deposition during the fall, 1995 at MRI, Tsukuba, Japan

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