Marine anthropogenic radiotracers in the Southern Hemisphere: New sampling and analytical strategies

Levy, Isabelle; Povinec, P.; Aoyama, Michio; Hirose, Katsumi; Sanchez-Cabeza, Joan-Albert; Comanducci, J.-F.; Gastaud, J.; Eriksson, Mats; Hamajima, Yasunori; Kim, C.S.; Komura, K.; Osvath, I.; Roos, Per; Yim, Seong A.

doi:10.1016/j.pocean.2010.12.012

Cited by 44 publications

(14 citation statements)

References 40 publications

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“…The method for 137 Cs analysis in seawater has been recently described in detail (Levy et al, 2011;Povinec et al, 2012b). Therefore, it will be only briefly mentioned here.…”

Section: Cesium-137 and 134 Cs Analysismentioning

confidence: 99%

Cesium, iodine and tritium in NW Pacific waters – a comparison of the Fukushima impact with global fallout

et al. 2013

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Abstract. Radionuclide impact of the Fukushima Dai-ichi nuclear power plant accident on the distribution of radionuclides in seawater of the NW Pacific Ocean is compared with global fallout from atmospheric tests of nuclear weapons. Surface and water column samples collected during the Ka'imikai-o-Kanaloa (KOK) international expedition carried out in June 2011 were analyzed for 134Cs, 137Cs, 129I and 3H. The 137Cs, 129I and 3H levels in surface seawater offshore Fukushima varied between 0.002–3.5 Bq L−1, 0.01–0.8 μBq L−1, and 0.05–0.15 Bq L−1, respectively. At the sampling site about 40 km from the coast, where all three radionuclides were analyzed, the Fukushima impact on the levels of these three radionuclides represents an increase above the global fallout background by factors of about 1000, 50 and 3, respectively. The water column data indicate that the transport of Fukushima-derived radionuclides downward to the depth of 300 m has already occurred. The observed 137Cs levels in surface waters and in the water column are compared with predictions obtained from the ocean general circulation model, which indicates that the Kuroshio Current acts as a southern boundary for the transport of the radionuclides, which have been transported from the Fukushima coast eastward in the NW Pacific Ocean. The 137Cs inventory in the water column is estimated to be about 2.2 PBq, what can be regarded as a lower limit of the direct liquid discharges into the sea as the seawater sampling was carried out only in the area from 34 to 37° N, and from 142 to 147° E. About 4.6 GBq of 129I was deposited in the NW Pacific Ocean, and 2.4–7 GBq of 129I was directly discharged as liquid wastes into the sea offshore Fukushima. The total amount of 3H released and deposited over the NW Pacific Ocean was estimated to be 0.1–0.5 PBq. These estimations depend, however, on the evaluation of the total 137Cs activities released as liquid wastes directly into the sea, which should improve when more data are available. Due to a suitable residence time in the ocean, Fukushima-derived radionuclides will provide useful tracers for isotope oceanography studies on the transport of water masses during the next decades in the NW Pacific Ocean.

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“…The method for 137 Cs analysis in seawater has been recently described in detail (Levy et al, 2011;Povinec et al, 2012b). Therefore, it will be only briefly mentioned here.…”

Section: Cesium-137 and 134 Cs Analysismentioning

confidence: 99%

Cesium, iodine and tritium in NW Pacific waters – a comparison of the Fukushima impact with global fallout

et al. 2013

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“…After precipitate was allowed to settle for 24 h, then it was separated from the marine water sample using paper filter. This water preparation method was conducted according to the standard procedures with minor modifications [8]. The high-purity germanium (HPGe) detectors (efficiencies of 20-25 % and a fullwidth half maximum (FWHM) of 1.8 keV for a peak of 1332 keV of 60 Co Canberra GX2018, Canberra GC2020, and Ortec GMX 25P4-76) were used to measure radioactivities.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…After radiochemical separation and electrodeposition, alpha spectrometer (Alpha analyst, Canberra) was used for 239/240 Pu analysis. Erica tool software was used to accomplished the assessment risk to the environment following a given release of radioactivity [8].…”

Section: Experimental Methodsmentioning

confidence: 99%

Present Status of Marine Radioecology in Jakarta Bay

et al. 2018

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Operation of nuclear facilities such as research reactor and it's supporting installation in Serpong Nuclear Area may release controlled radionuclides to Cisadane River and then it would flow to Jakarta Bay. There are limited marine radioecology studies or radionuclides monitoring at Jakarta Bay. Therefore monitoring of 239/240 Pu and 137 Cs was carried out from Tanjung Pasir to Tanjung Kerawang. The ERICA Assessment Tool was used to evaluate radiological risk in the marine environment of Jakarta Bay area. The 137 Cs concentration in sea water and sea sediments were in range of 0.17-1.17 Bq.m-3 and 0.34-1.21 Bq.kg-1 , respectively. Moreover, result of 239/240 Pu measurement showed that concentration at sea water and sea sediment were range from < MDA-0.53 mBq.m-3 and 2.64-55.70 mBq.kg-1 respectively. The results of risk analysis were indicated that all the total dose rates per organism were millions time lower than the screening rate (10 mGy.h-1).

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“…Except the most frequently studied 134 Cs and 137 Cs (gamma-ray emitters easily measured with HPGe detectors [31,32]), which have been important for delivery of postaccident radiation doses to the public and biota [33], there have been many other radionuclides released during the accident [30,[34][35][36], requiring our attention. This has been motivated first of all because of delivery of radiation doses to the public and biota by long-lived radionuclides (e.g.…”

Section: Introductionmentioning

confidence: 99%

Recent results from the AMS/IBA laboratory at the Comenius University in Bratislava: preparation of targets and optimization of ion sources

Povinec

Masarik

Ješkovský

et al. 2015

J Radioanal Nucl Chem

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Developments of solid targets and optimizations of ion sources were carried out with the aim to produce high ion yields for applications of tandem accelerators as mass spectrometers. A comparison of Al -yields from different aluminum targets showed that the best results were obtained with AlN targets. Transmission studies of 9 Be and 12 C ions through the Pelletron accelerator showed highest efficiencies for 9 Be 2? and 12 C 2? . First results obtained with a simplified version of the AMS line are presented as well.

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Marine anthropogenic radiotracers in the Southern Hemisphere: New sampling and analytical strategies

Cited by 44 publications

References 40 publications

Cesium, iodine and tritium in NW Pacific waters – a comparison of the Fukushima impact with global fallout

Cesium, iodine and tritium in NW Pacific waters – a comparison of the Fukushima impact with global fallout

Present Status of Marine Radioecology in Jakarta Bay

Recent results from the AMS/IBA laboratory at the Comenius University in Bratislava: preparation of targets and optimization of ion sources

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