Fallout nuclides in Atlantic and Pacific water columns : GEOSECS data

Livingston, Hugh D.; Bowen, Vaughan T.; Casso, Susan A.; Volchok, H.L.; Noshkin, V.E.; Wong, K.M.; Beasley, T.M.

doi:10.1575/1912/4360

Cited by 27 publications

(17 citation statements)

References 2 publications

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“…The data show no evidence of significant differences between the measured 239,240 Pu concentrations at the two dumpsites and those at the control stations. Our measured total 239,240 Pu concentrations in surface waters (mean = 4.6 ± 1.7 mBq m -3 ; range = 2.4 -6.2 mBq m -3 ) are similar to those reported in the early 1990s by Holm et al [8], but a factor of 13 lower than those measured in NE Atlantic waters during 1972 (GEOSECS programme) [9]. As seen in other oceans and S274 RADIOPROTECTION Figure 2.…”

Section: Resultssupporting

confidence: 85%

Plutonium measurements at NEA’s North East Atlantic dumpsites

2011

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Section: Resultssupporting

confidence: 85%

Plutonium measurements at NEA’s North East Atlantic dumpsites

2011

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“…The 30% lower coral %Sr values during the winter could not be due to increased depth of the mixed Table 4 for comparison of actual values. layer and entrainment of lower '?$r waters, since 90Sr levels in the subsurface waters are the same or higher than those in surface waters (BOWEN et al, , 1974LIVINGSTON et al, 1985). There is prelimin~ evidence that this seasonal variation in 9oSr activity in corals is related to the position of the Loop Current.…”

Section: Oceanographic Considerationsmentioning

confidence: 96%

Anomalous levels of 90Sr and 239,240Pu in Florida corals: Evidence of coastal processes

Purdy

Druffel

Hugh

1989

Geochimica et Cosmochimica Acta

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“…The reconstructed 239Pu concentration based on the measurement of 90Sr for the 1962 sampling period is therefore 0.05 Bq/m3. The concentration of 241Am is estimated to have been 0.009 Bq/m", using a 241Am/90Sr ratio of about 0.001 determined from the station of Livingston et al (1985). The RAIG estimates that the current concentration of 90Sr in the Chukchi Sea is about 1 Bq/m(l.9…”

Section: -33 Arctic Seas and Source Waters Of The Atlantic And Pacifmentioning

confidence: 98%

“…For example, the average concentrations of 24*Am, 137Cs, 239,240Pu, and 90Sr in seawater to a depth of 80 m at one location in the northern Pacific Ocean sampled by Livingston et al (1985) in 1973 were 0.004, 6.1, 0.012, and 3.5 Bq/m3, respectively. In a later study involving lX7Cs, 239,240Pu, and 90Sr in the central North Pacific, Nagaya and Nakamura (1984) reported that the average concentrations of those nuclides in surface waters of the 35" to 40" N latitudinal zone for the years 1980 and 1982 were 5.6, 0.038, and 4 Bq/m3.…”

Section: -33 Arctic Seas and Source Waters Of The Atlantic And Pacifmentioning

confidence: 99%

“…Concentrations of 241Am and 239P~ in the early 1960s can also be estimated using ratios of the concentrations of those nuclides to the concentrations of %r in surface waters of the northern Pacific Ocean. The RAIG has calculated an average 239Pu/90Sr ratio of -0.005 for these waters, based on the following set of concentration ratios: 0.0034 (for station at 50" 26.8' N 176" 35.0' W sampled in 1973; Livingston et al, 1985); 0.0075 (average for surface waters from stations 80-5,80-6, and 80-8 sampled in 1980; Nagaya and Nakamura, 1984); and 0.0031 (for station at 30" 03' N 170" 03' W sampled in 1968, Miyake and Sugimura, 1976). The reconstructed 239Pu concentration based on the measurement of 90Sr for the 1962 sampling period is therefore 0.05 Bq/m3.…”

Section: -33 Arctic Seas and Source Waters Of The Atlantic And Pacifmentioning

confidence: 99%

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Radionuclides in the Arctic seas from the former Soviet Union: Potential health and ecological risks

Layton¹,

Edson²,

Varela³

et al. 1999

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PREFACEn 1993, radioactive waste-management practices of the former Soviet Union (FSU) came un-I, der increasing international scrutiny after Russian scientists disclosed dumped-nuclear-waste ites in the Kara and Barents seas that contravened the London Convention ban on radioactive waste disposal at sea. The U.S. response was to fund the Office of Naval Research Arctic Nuclear Waste Assessment Program (ANWAP) to (1) quantify the types, amounts, and rates of release of radionuclides from marine disposal sites and Russian riverine sources leading to Arctic waters; (2) evaluate the transport pathways and ultimate fate of the radionuclide contaminants; and (3) identify any long-term monitoring strategies as needed. ANWAP began funding basic physical, geochemical, and biological oceanographic research in the Arctic in 1993.By early 1995 the second year of ANWAP research was well under way and planning for the final ANWAP funding cycle emphasized the need to better coordinate and integrate the activities and results of the 85 research projects into a risk-assessment framework. The goal: to use data sets in a rigorous evaluation process to make dose estimates for potential human and ecological impacts, particularly in Alaska, from the nuclear wastes the FSU had dumped in the Arctic. A Risk Assessment Integration Group (RAIG) was formed to conduct the assessment. The RAIG recognized at the outset of this risk-assessment phase that the risk analysis would have to depend on available ANWAP data and other published data sets, and that ongoing research would continue to generate new data even after the data cutoff point for timely preparation of the risk assessment. The RAIG has established an evaluation framework that, through an ongoing iterative process, can be enhanced as new information becomes available.The risk assessment follows a traditional, internationally accepted radiological risk-assessment process. It uses models to make predictions, but also incorporates actual field measurements and laboratory data obtained from ANWAP scientists and the broader national and international scientific community. The risk-assessment team involved key scientists from Alaska (Douglas Dasher, Department of Environmental Conservation, and Todd O'Hara, North Slope Borough Department of Wildlife Management); Lawrence Livermore National Laboratory (David Layton, Mark Mount, Florence Harrison, and John Knezovich); Sandia National Laboratories (Rip Anderson, Mel Marietta, Leo Gomez, and Palmer Vaughn); Battelle Pacific Northwest Laboratories (William Templeton and Bruce Napier); and the Office of Naval Research (Marilyn Varela). This integrating team (the RAIG) identified discrete areas of focus and authorship for various components of the risk assessment; in the preparation of this report, the team relied upon the input of key ANWAP Principal Investigators, some of whose information was timely enough for use, and some not. Each section of the report identifies the authors. Although inputs from Russian contributors were instrumental in...

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Fallout nuclides in Atlantic and Pacific water columns : GEOSECS data

Abstract: Introduction

Cited by 27 publications

References 2 publications

Plutonium measurements at NEA’s North East Atlantic dumpsites

Plutonium measurements at NEA’s North East Atlantic dumpsites

Anomalous levels of 90Sr and 239,240Pu in Florida corals: Evidence of coastal processes

Radionuclides in the Arctic seas from the former Soviet Union: Potential health and ecological risks

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