Spatial distributions of 137Cs and 239+240Pu in surface seawater within the Exclusive Economic Zone of East Coast Peninsular Malaysia

Ahmad, Zainal Ariffin; Yii, Mei-Wo; Bakar, Ahmad Sanadi Abu; Shahar, Hidayah

doi:10.1016/j.apradiso.2010.04.012

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…After adequately mixing of seawater, 240 Pu/ 239 Pu atom ratio in seawater can be regarded as a consistent value if there isn't any other Pu source injection. As shown in Table 1, recent studies within 10 years showed a centralized 240 Pu/ 239 Pu atom ratio in seawater in the western North Pacific from 0.199 to 0.246 [32][33][34][35][36][37][38][39][40][41][42][43], with higher ratios (0.18-0.33) in the coastal waters of the Korean Peninsula [22] Table 2 in the western North Pacific during the UM 13-05 cruise (T/S Umitaka-maru, Tokyo University of Marine Science and Technology) in May 2013. All the sampling locations were within the 30 km zone around the FDNPP site except N01, which was about 38 km away.…”

Section: Introductionmentioning

confidence: 99%

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Pu Distribution in Seawater in the Near Coastal Area off Fukushima after the Fukushima Daiichi Nuclear Power Plant Accident

Zheng

Aono

et al. 2015

Journal of Nuclear and Radiochemical Sciences

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The Fukushima Daiichi Nuclear Power Plant (FDNPP) accident released large amount of radionuclides into the marine environment. Compared with the fission products, data on the distributions of Pu in the marine environment of the western North Pacific after the accident is limited. To better understand the Pu contamination in the marine environment after the accident, for the first time, we determined Pu isotope ratio ( 240 Pu/ 239 Pu) in addition to 239+240 Pu activity in seawater collected in the near coastal area (mostly within the 30 km zone) off the FDNPP site. The 239+240 Pu activities were 4.16-5.52 mBq/m 3 and the 240 Pu/ 239 Pu atom ratios varied from 0.221 to 0.295. These values were compared with the baseline data for Pu distribution in the near coast seawaters before the FDNPP accident (2008)(2009)(2010). The results suggested that there is no significant Pu contamination in seawater in the near coastal area off the FDNPP site from the accident two years after the accident.

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Section: Introductionmentioning

confidence: 99%

“…For that reason, Pu activity in seawater of the western North Pacific took on a large variation (i.e. 1.52-22.3 mBq/m 3 as Table 1 shows) [22,[28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Pu Distribution in Seawater in the Near Coastal Area off Fukushima after the Fukushima Daiichi Nuclear Power Plant Accident

Zheng

Aono

et al. 2015

Journal of Nuclear and Radiochemical Sciences

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“…The aim of the projects was to expand [18], the concentration of 239+240 Pu was slightly higher than the previous study in the southern area. Maybe the reason was due to the 'obstruction' caused by Anambas and Natuna Isles that are located at the southern end of South China Sea which caused the limitation of seawater flow in that area.…”

Section: Marine Samples Monitoring In Malaysiamentioning

confidence: 81%

“…Three reference materials, IAEA 368, IAEA 384 and IAEA 385 were used as samples and were radio chemically separated. All samples were treated with sample digestion, anion exchange, purification and electrodeposition before being counted using [17], b [18], c [19], d [20] alpha spectrometry system. The standard reference materials chosen were suitable to determine the activity of Pu radioisotopes to represent the marine environment.…”

Section: Resultsmentioning

confidence: 99%

Determination of <sup>238</sup>PU and <sup>239+240</sup>PU in Marine Sediment Using Alpha Spectrometry

Yusof¹,

Sharib²,

Jaffary³

2017

Eurasian J Anal Chem

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A radiochemical separation method to determine plutonium (Pu) radioisotopes in environmental samples has been established in Radiochemistry and Environmental Laboratory in Malaysia. The analysis involving sample digestion with aqua regia solution and followed by radiochemical separation using ion exchange method. The source for alpha spectrometry was prepared by electrodeposition. The chemical recoveries were determined using 242 Pu tracer. The method was tested on reference materials and on real sediments from Malaysia marine environment. The validity of the method was checked for coherence using the t-test, relative error and relative standard deviation. All the results obtained were in good agreement with the reference values which indicated that the recommended procedures was successfully applied for the determination of plutonium activities in Radiochemistry and Environmental Laboratory in Malaysia.

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Radioactivity of plutonium isotopes, 137Cs and their ratio in sediment, seawater and biota from the east coast of Peninsular Malaysia

Yii

Mahmood

2011

J Radioanal Nucl Chem

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Spatial distributions of 137Cs and 239+240Pu in surface seawater within the Exclusive Economic Zone of East Coast Peninsular Malaysia

Cited by 7 publications

References 20 publications

Pu Distribution in Seawater in the Near Coastal Area off Fukushima after the Fukushima Daiichi Nuclear Power Plant Accident

Pu Distribution in Seawater in the Near Coastal Area off Fukushima after the Fukushima Daiichi Nuclear Power Plant Accident

Determination of <sup>238</sup>PU and <sup>239+240</sup>PU in Marine Sediment Using Alpha Spectrometry

Radioactivity of plutonium isotopes, 137Cs and their ratio in sediment, seawater and biota from the east coast of Peninsular Malaysia

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