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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2015 ; 10
(10
): e0140482
Nephropedia Template TP
gab.com Text
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English Wikipedia
Minimal Internal Radiation Exposure in Residents Living South of the Fukushima
Daiichi Nuclear Power Plant Disaster
#MMPMID26484532
Akiyama J
; Kato S
; Tsubokura M
; Mori J
; Tanimoto T
; Abe K
; Sakai S
; Hayano R
; Tokiwa M
; Shimmura H
PLoS One
2015[]; 10
(10
): e0140482
PMID26484532
show ga
Following the Fukushima nuclear power plant disaster, assessment of internal
radiation exposure was indispensable to predict radiation-related health threats
to residents of neighboring areas. Although many evaluations of internal
radiation in residents living north and west of the crippled Fukushima nuclear
power plant are available, there is little information on residents living in
areas south of the plant, which were similarly affected by radio-contamination
from the disaster. To assess the internal radio-contamination in residents living
in affected areas to the south of the plant or who were evacuated into Iwaki
city, a whole body counter (WBC) screening program of internal
radio-contamination was performed on visitors to the Jyoban hospital in Iwaki
city, which experienced less contamination than southern areas adjacent to the
nuclear plant. The study included 9,206 volunteer subjects, of whom 6,446 were
schoolchildren aged 4-15 years. Measurements began one year after the incident
and were carried out over the course of two years. Early in the screening period
only two schoolchildren showed Cs-137 levels that were over the detection limit
(250 Bq/body), although their Cs-134 levels were below the detection limit (220
Bq/body). Among the 2,760 adults tested, 35 (1.3%) had detectable internal
radio-contamination, but only for Cs-137 (range: 250 Bq/body to 859 Bq/body), and
not Cs-134. Of these 35 subjects, nearly all (34/35) showed elevated Cs-137
levels only during the first year of the screening. With the exception of
potassium 40, no other radionuclides were detected during the screening period.
The maximum annual effective dose calculated from the detected Cs-137 levels was
0.029 and 0.028 mSv/year for the schoolchildren and adults, respectively, which
is far below the 1 mSv/year limit set by the government of Japan. Although the
data for radiation exposure during the most critical first year after the
incident are unavailable due to a lack of systemic measurements, the present
results suggest that internal radio-contamination levels more than one year after
the incident were minimal for residents living south of the crippled Fukushima
nuclear plant, and that the annual additional effective doses derived from
internal Cs contamination were negligible. Thus, internal radio-contamination of
residents living in southern radio-contaminated areas appears to be generally
well controlled.
|*Disasters
[MESH]
|*Fukushima Nuclear Accident
[MESH]
|Adolescent
[MESH]
|Adult
[MESH]
|Aged
[MESH]
|Aged, 80 and over
[MESH]
|Cesium Radioisotopes/analysis
[MESH]
|Child
[MESH]
|Child, Preschool
[MESH]
|Environmental Exposure/*analysis/prevention & control
[MESH]