129I dispersion and sources in Northwest Canada

Herod, Matthew N.; Clark, Ian D.; Kieser, W.E.; Agosta, Sarah; Zhao, Xiao-Lei

doi:10.1016/j.nimb.2012.06.018

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…On the other hand, the content of the radioisotope 129 I in the samples studied in this work are between 1.0 × 10 5 atoms/L and 7.5 × 10 5 atoms/L, which lie between the natural level (3.7 × 10 4 atoms/L) and the estimated level due to the nuclear tests (1.0 × 10 6 atoms/L). These concentrations are lower than others reported for the same region , and at least 1 order of magnitude lower than 129 I levels measured in samples from the Northern Hemisphere, even for samples collected far away from the nuclear fuel reprocessing plants …”

Section: Results and Discussioncontrasting

confidence: 64%

“…These concentrations are lower than others reported for the same region 1,10 and at least 1 order of magnitude lower than 129 I levels measured in samples from the Northern Hemisphere, even for samples collected far away from the nuclear fuel reprocessing plants. 15 The latitudinal profile for 129 I is shown in Figure 3. It does not present a clear dependency with latitude as observed for total iodine, although lower values of this radioisotope are found at around −40°.…”

Section: Experimental Methodsmentioning

confidence: 99%

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¹²⁹I Dispersion in Argentina: Concentrations in Fresh and Marine Water and Deposition Fluences in Patagonia

Negri

Niello

Wallner

et al. 2013

Environ. Sci. Technol.

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Measurements of total iodine (I) and iodine-129 ((129)I) concentrations in rivers and lakes of Argentina are presented. Their latitudinal distribution can be explained by taking into account their main sources (oceanic emissions and biomass burning for I, and atmospheric nuclear tests for (129)I), transport mechanisms, and fallout patterns. From the measured (129)I concentrations in the studied lakes, deposition fluences for their catchment areas were estimated. These results agree with a model of the global deposition pattern due to the (129)I released by atmospheric nuclear weapon tests and with other fluences reported for the southern hemisphere. In addition, the first measurements of (129)I in shallow seawater from the South Atlantic Ocean are presented and discussed.

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Section: Results and Discussioncontrasting

confidence: 64%

Section: Experimental Methodsmentioning

confidence: 99%

¹²⁹I Dispersion in Argentina: Concentrations in Fresh and Marine Water and Deposition Fluences in Patagonia

Negri

Niello

Wallner

et al. 2013

Environ. Sci. Technol.

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“…Iodine was extracted from samples of precipitation and groundwater using the silver iodide precipitation method with stable 127 I carrier ( 129 I/ 127 I: 15.6 ± 0.6 × 10 −14 ) as described in Sheppard and Herod [] and Herod et al . []. 129 I in the AgI targets was measured using the University of Ottawa's IsoTrace Accelerator Mass Spectrometer.…”

Section: Methodsmentioning

confidence: 99%

The atmospheric transport of iodine‐129 from Fukushima to British Columbia, Canada and its deposition and transport into groundwater

Herod

Suchy

Cornett

et al. 2015

Water Resources Research

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The Fukushima-Daiichi nuclear accident (FDNA) released iodine-129 (15.7 million year half-life)and other fission product radionuclides into the environment in the spring and summer of 2011. 129 I is recognized as a useful tracer for the short-lived radiohazard 131 I, which has a mobile geochemical behavior with potential to contaminate water resources. To trace 129 I released by the FDNA reaching Canada, preaccident and post-accident rain samples collected in Vancouver, on Saturna Island and from the National Atmospheric Deposition Program in Washington State were measured. Groundwater from the AbbotsfordSumas Aquifer was sampled to determine the fate of 129 I that infiltrates below the root zone. Modeling of vadose zone transport was performed to constrain the travel time and retardation of 129 I. The mean preaccident 129 I concentration in rain was 31 3 10 6 atoms/L (n 5 4). Immediately following the FDNA, 129 I values increased to 211 3 10 6 atoms/L and quickly returned to near-background levels. However, pulses of elevated 129 I continued for several months. The increases in 129 I concentrations from both Vancouver and Saturna Island were synchronized, and occurred directly after the initial release from the FDNA. The 129 I in shallow ( 3 H/ 3 He age <1.4 years) Wassenaar et al. (2006) groundwater showed measurable variability through March 2013 with an average of 3.2 3 10 6 atoms/L (n 5 32) that was coincident with modeled travel times for Fukushima 129 I. The groundwater response and the modeling results suggest that 129 I was partially attenuated in soil, which is consistent with its geochemical behavior; however, we conclude that the measured variability may be due to Fukushima 129 I entering groundwater.

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“…Indeed, most of them were found close to the value associated with nuclear weapon tests (1.0·10 6 atoms/L). However, they are more than one order of magnitude lower than the reported values for the Northern Hemisphere, even for locations far away from any reprocessing plants [12]. The latitudinal dependence of 129 I is shown in Fig.…”

Section: Latitudinal Dependence Of I and 129 Imentioning

confidence: 65%

Determination of total I and¹²⁹I concentrations in freshwater of Argentina

Fernandez

Negri

Wallner

et al. 2013

EPJ Web of Conferences

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Abstract. Total iodine and129-iodine in rivers and lakes of Argentina were measured by means of inductively coupled plasma mass spectrometry and accelerator mass spectrometry respectively. The obtained isotopic ratios, higher than the natural level, are explained as the delayed signal from nuclear weapon atmospheric tests. Besides, deposition fluences in catchment areas of the lakes are analyzed. Their latitudinal dependence, similar to the dependence of annual precipitation rates, favours wet deposition as the main 129 I fallout mechanism for this region.

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129I dispersion and sources in Northwest Canada

Cited by 7 publications

References 22 publications

¹²⁹I Dispersion in Argentina: Concentrations in Fresh and Marine Water and Deposition Fluences in Patagonia

¹²⁹I Dispersion in Argentina: Concentrations in Fresh and Marine Water and Deposition Fluences in Patagonia

The atmospheric transport of iodine‐129 from Fukushima to British Columbia, Canada and its deposition and transport into groundwater

Determination of total I and¹²⁹I concentrations in freshwater of Argentina

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129I dispersion and sources in Northwest Canada

Cited by 7 publications

References 22 publications

129I Dispersion in Argentina: Concentrations in Fresh and Marine Water and Deposition Fluences in Patagonia

129I Dispersion in Argentina: Concentrations in Fresh and Marine Water and Deposition Fluences in Patagonia

The atmospheric transport of iodine‐129 from Fukushima to British Columbia, Canada and its deposition and transport into groundwater

Determination of total I and129I concentrations in freshwater of Argentina

Contact Info

Product

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¹²⁹I Dispersion in Argentina: Concentrations in Fresh and Marine Water and Deposition Fluences in Patagonia

¹²⁹I Dispersion in Argentina: Concentrations in Fresh and Marine Water and Deposition Fluences in Patagonia

Determination of total I and¹²⁹I concentrations in freshwater of Argentina