후쿠시마 핵발전소 사고가 사람 모유의 방사성 요오드131 함유량에 미친 영향
Effect of the Fukushima nuclear power plant accident on
radioiodine (131I) content in human breast milkjog_1810 772..779
노부야 우노 외
Nobuya Unno1, Hisanori Minakami2, Takahiko Kubo7, Keiya Fujimori3, Isamu Ishiwata4, Hiroshi Terada5, Shigeru Saito6, Ichiro Yamaguchi5, Naoki Kunugita5, Akihito Nakai8, and Yasunori Yoshimura9
초록
Abstract
Background: Environmental pollution with radioiodine (iodine-131, 131I) occurred after an accident at the Fukushima nuclear power plant (FNP) on March 11, 2011, in Japan.Whether environmental pollution with 131I can contaminate human breast milk has not been documented.
Methods: The 131I content was determined in 126 breast milk samples from 119 volunteer lactating women residing within 250 km of the FNP, between April 24 and May 31, 2011. The degree of environmental pollution was determined based on the data released by the Japanese government.
Results: An 131I content of 210 Bq/kg in the tap water in Tokyo, which is located 230 km south of the FNP, on March 22 and of 3500 Bq/kg in spinach sampled in a city located 140 km southwest of the FNP on March 19 decreased over time to <21 Bq/kg on March 27 and 12 Bq/kg on April 26, respectively. Seven of the 23 women who were tested in April secreted a detectable level of 131I in their breast milk. The concentrations of 131I in the breast milk of the seven women were 2.3 Bq/kg (on April 24), and 2.2, 2.3, 2.3, 3.0, 3.5 and 8.0 (on April 25 ; the concentrations of 131I in the tap water available for these seven women at the same time were estimated to be <1.3 Bq/kg. None of the remaining 96 women tested in May exhibited a detectable concentration of 131I in their breast milk samples.
Conclusions: The contamination of breast milk with 131I can occur even when only mild environmental 131I pollution is present.
결론 : 모유의 요오드 131의 오염은 심지어 낮은 환경 요오드 오염으로부터도 발생할 수 있다.
Key words: human breast milk, iodine-131, nuclear power plant accident, radioiodine.
