Radioactive Cesium Analysis in Radiation-Tainted Beef by Gamma-Ray Spectrometry with Germanium Semiconductor Detector

Minatani, Tomiaki; Nagai, Hiroyuki; Nakamura, Masashi; Otsuka, Kimihito; Sakai, Yoshimichi

doi:10.3358/shokueishi.53.177

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The edible portion of sampled fish was minced and placed into 100 ml plastic containers (U-8 containers). The concentration of Cs-134 and Cs-137 radioisotopes in the fish biomass were measured by IDEA Consultants Inc. (Tokyo, Japan) using a germanium semiconductor detector (Seiko EG&G Co.Model:GEM20-70) (Inazu et al, 2011;Minatani et al, 2012).…”

Section: Methodsmentioning

confidence: 99%

Some fish species in offshore Fukushima, Japan ability to accumulate a specific nuclide (radioisotope)

KATSURA¹

2016

Int. J. Phys. Sci.

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The Tokyo Electric Power Company's, Fukushima Dai-ichi nuclear power plant in Fukushima-Ken (Fukushima Prefecture), Japan, was destroyed in March 2011 by a massive magnitude 9 earthquake (centred offshore to the northeast of Honshu Island) and by the subsequent historic Tsunami of March 11, 2011. Because of the nuclear meltdown, hydrogen-explosion damage to the buildings that housed the reactors, and the contamination of the cooling water from the reactor cores, large quantities of radioisotopes were emitted into the atmosphere and adjacent seawater. The Tokyo University of Marine Science and Technology has measured radioisotope levels in fishery species off Iwaki-Shi(Iwaki City), Fukushima-Ken (located south of the former nuclear power plant); these data could be used to understand the relationship between the accumulation of specific nuclides (radioisotopes) and certain species of fish, as follows: [1] It is possible to accumulate or separate specific nuclides (134Cs and 137Cs) by combining Sebastes cheni (Japanese rockfish; SHIROMEBARU) and Kareius bicoloratus (Stone flounder; ISHIGAREI), and Ditrema temmincki temmincki (Surfperch; UMITANAGO) and Cynoglossus joyneri (Red tongue sole; AKASHITA BIRAME). [2] There are differences in 134Cs and 137Cs accumulation between adult fish and fry of Paralichthys olivaceus (Bastard halibut; HIRAME). Therefore, some fish species have the ability to accumulate a specific nuclide (radioisotope). To date, ultra-centrifugation and diffusion methods have been used to accumulate specific nuclides for atomic fuel. However, if we could use the ability of some fish species to accumulate specific nuclides, we would have additional methods to concentrate nuclides.

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Section: Methodsmentioning

confidence: 99%

Some fish species in offshore Fukushima, Japan ability to accumulate a specific nuclide (radioisotope)

KATSURA¹

2016

Int. J. Phys. Sci.

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show abstract

“…Subsequently, the edible portions of the fish were minced, and U-8 containers (100 mL) were filled with the minced fish flesh. The concentrations of the radioisotopes Cs-134 and Cs-137 in the fish biomass were measured by IDEA Consultants Inc. (Tokyo, Japan) using a germanium semiconductor detector (Seiko EG&G Co. model GEM20-70) (Inazu et al, 2011;Minatani et al, 2012).…”

Section: Methodsmentioning

confidence: 99%

Total quantity of caesium radioisotopes in fish in the Fukushima-Ken Exclusive Economic Zone, Japan, in November 2012

KATSURA¹

2013

Sci. Res. Essays

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The Tokyo Electric Power Company Fukushima Dai-ichi nuclear power plant in Fukushima-Ken (Prefecture), Japan, was destroyed in March 2011 due to a massive earthquake (magnitude 9) centred offshore to the northeast of Honshu Island and the subsequent historic tsunami on 11 March 2011. Due to nuclear meltdown, damage to the buildings housing the reactors by hydrogen explosions, and the contamination of cooling water from the reactor cores, huge quantities of radioisotopes were emitted to the atmosphere and to the adjacent seawater. Fishing is currently prohibited off the coast of Fukushima-Ken because intermittent surveys have found that the majority of fishery products still contain radioisotope levels exceeding the Japanese Standard Value. However, the total amount of caesium radioisotopes in fish biomass in the Fukushima-Ken Exclusive Economic Zone (EEZ) has not yet been reported. The Tokyo University of Marine Science and Technology has measured radioisotope levels in fishery species off Iwaki-Shi (City), Fukushima-Ken (located south of the destroyed nuclear power plant), and these data can be used to estimate the total fish biomass and the quantity of caesium radioisotopes in fish in the Fukushima-Ken EEZ. On 22 to 23 November 2012, the estimated total fish biomass in the Fukushima-Ken EEZ was 91,150,218.79 kg and the estimated total quantities of Cs-134 and Cs-137 in fish were 4,879,259,657 Bq and 8,381,002,727 Bq, respectively.

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Absorber-coupled lumped element kinetic inductance detectors for gamma-rays

Naruse

Miyamoto

Taino

et al. 2017

Physica C: Superconductivity and its Applications

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Radioactive Cesium Analysis in Radiation-Tainted Beef by Gamma-Ray Spectrometry with Germanium Semiconductor Detector

Cited by 3 publications

References 4 publications

Some fish species in offshore Fukushima, Japan ability to accumulate a specific nuclide (radioisotope)

Some fish species in offshore Fukushima, Japan ability to accumulate a specific nuclide (radioisotope)

Total quantity of caesium radioisotopes in fish in the Fukushima-Ken Exclusive Economic Zone, Japan, in November 2012

Absorber-coupled lumped element kinetic inductance detectors for gamma-rays

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