Carbon-14 in tree rings and other terrestrial samples in the vicinity of Ignalina Nuclear Power Plant, Lithuania

Mažeika, Jonas; Petrošius, Rimantas; Pukienė, Rūtilė

doi:10.1016/j.jenvrad.2007.07.011

Cited by 23 publications

(18 citation statements)

References 20 publications

(14 reference statements)

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“…14 C is radiologically important due to its ease of incorporation into the global carbon cycle and long half-life (5730 yr). Indeed, many studies have shown that 14 C discharged from nuclear facilities contributes a significant fraction of the radiation dose delivered to both local and global populations (Hertelendi et al 1989;Veres et al 1995;Isogai et al 2002;Roussel-Debet et al 2006;Mazeika et al 2008;Povinec et al 2009).…”

Section: Introductionmentioning

confidence: 99%

14C Levels in Tree Rings Located Near Qinshan Nuclear Power Plant, China

2012

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Specific activities of radiocarbon in annual tree rings corresponding to 1980-2009 are reported for a pine tree located 2 km from the Qinshan Nuclear Power Plant (Qinshan NPP), China. While a negligible enhanced14C activity due to operation of the Qinshan NPP Plant I is evident, a relative increase (1.8–62.6 Bq/kg C) was observed in the specific activity after operation of the Qinshan NPP Plant II in 2002 and Plant III in 2003. The enhanced values were primarily affected by the14C discharged from Plant III (CANDU-type reactor), and a good correlation was found between the14C discharged from Plant III in the growing season and the14C excess value. The excess14C activities peaked in 2005 (at 302.0 Bq/kg C, which is 62.6 Bq/kg C above the “clean air”14C level), and then declined due to the improvement in14C discharge management of Plant III. In 2009, the14C-specific activity was near the background level.

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Section: Introductionmentioning

confidence: 99%

14C Levels in Tree Rings Located Near Qinshan Nuclear Power Plant, China

2012

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“…The 14 C activity concentration of the tree rings at both sampling points decreased by more than 44‰ in the course of the investigated period as a result of the decline of the 14 C signal due to atmospheric nuclear testing. The 14 C atmospheric concentration has been continuously decreasing almost exponentially following the Comprehensive Test Ban Treaty because of the buffering effect of the biosphere and the oceans (Levin et al 1985;Povinec et al 1986;Hua et al 2000;Levin and Kromer 2004;Mazeika et al 2008). …”

Section: Resultsmentioning

confidence: 99%

“…), cellulose is not remobilized in tree tissues after formation (Hertelendi and Csongor 1982;Hua et al 1999). Therefore, changes in the atmospheric 14 C activity concentration are preserved in the cellulose of tree rings (Tans et al 1979;Otlet et al 1989;Isogai et al 2002;Mazeika et al 2008). …”

Section: Introductionmentioning

confidence: 99%

Radiocarbon Impact on a Nearby Tree of a Light-Water VVER-Type Nuclear Power Plant, Paks, Hungary

et al. 2013

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ABSTRACT. Tree-ring series were collected for radiocarbon analyses from the vicinity of Paks nuclear power plant (NPP) and a background area (Dunaföldvár) for a 10-yr period (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009). Samples of holocellulose were prepared from the wood and converted to graphite for accelerator mass spectrometry (AMS) 14 C measurement using the MICADAS at ETH Zürich. The 14 C concentration data from these tree rings was compared to the background tree rings for each year. The global decreasing trend of atmospheric 14 C activity concentration was observed in the annual tree rings both in the background area and in the area of the NPP. As an average of the past 10 yr, the excess 14 C emitted by the pressurized-water reactor (PWR) NPP to the atmosphere shows only a slight systematic excess (~6‰) 14 C in the annual rings. The highest 14 C excess was 13‰ (in 2006); however, years with the same 14 C level as the background were quite frequent in the tree-ring series.

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“…Conventional method for benzene synthesis was used (Barker, 1953;Tamers, 1975). This method was widely applied in large number of laboratories and by many scientists (Beramendi-Orosco et al, 2006;Mazeika et al, 2008). The standard method consists of the following essential steps (Edler, 2009; ASTM, 2011): 1) lithium carbide production, 2) acetylene production, 3) trimerization of acetylene to transform it to benzene.…”

Section: Benzene Synthesismentioning

confidence: 99%

Method validation for the determination of fraction of modern (F<sup>14</sup>C) in wood samples using conventional method

et al. 2018

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The radiocarbon laboratory at the Lebanese Atomic Energy Commission is undertaking environmental studies, in order to determine the anthropogenic impact of technologies on the ecosystem through the determination of radiocarbon content in tree leaves and plants. Thus, it was important to validate the method used to demonstrate that the applied procedure gives reliable results. Method validation is universally applied in analytical laboratories as an essential part of quality assurance system and as a basic technical requirement of the ISO 17025 standard. The conventional method used for determination of Fraction Modern (F14C) is a standard method issued by the American Society for Testing and Materials in 2011 with a code ASTM-D 6866-11 Method C. According to Eurachem guide, internal validation was expressed in terms of accuracy that was evaluated by trueness and precision. Trueness was expressed in terms of relative bias, while for precision ten consecutive replicates were carried out to under repeatability conditions and five duplicates were analyzed under reproducibility conditions. The limit of detection and the minimum detectable activity (MDA) were calculated. Uncertainty sources were defined and their relative standard uncertainties were calculated in order to determine the combined standard uncertainty. Five reference samples of different matrices were analyzed; calculated z score values were acceptable as being between –2 and +2. The calculation and results are presented in this work.

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Carbon-14 in tree rings and other terrestrial samples in the vicinity of Ignalina Nuclear Power Plant, Lithuania

Cited by 23 publications

References 20 publications

14C Levels in Tree Rings Located Near Qinshan Nuclear Power Plant, China

14C Levels in Tree Rings Located Near Qinshan Nuclear Power Plant, China

Radiocarbon Impact on a Nearby Tree of a Light-Water VVER-Type Nuclear Power Plant, Paks, Hungary

Method validation for the determination of fraction of modern (F<sup>14</sup>C) in wood samples using conventional method

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