Page 404 - 2014 Printable Abstract Book
P. 404
S30 CHORNOBYL / FUKUSHIMA SESSION
This session will focus on the Fukushima accident in regard to population dosimetry,
ultrasonography surveys on thyroid cancer incidence, and psychosocial effects; the integration of
molecular data in evaluation of thyroid cancer risk in a cohort of Ukrainians exposed after Chernobyl to
131I, and risk of thyroid cancer after exposure in adulthood.
(S3001) Ultrasonography surveys and thyroid cancer after the Fukushima Daiichi accident.
Peter Jacob; Jan Christian Kaiser; and Alexander Ulanousky, Helmholtz Zentrum Muenchen, Neuherberg,
Germany
Thyroid cancer is one of the major health concerns after the accident in the Fukushima Dai-ichi
nuclear power station. Currently, ultrasonography surveys are being performed for persons residing in
the Fukushima Prefecture at the time of the accident with an age of up to 18 years. We assessed the
expected thyroid cancer prevalence in the Fukushima Prefecture based on an ultrasonography survey of
Ukrainians, who were exposed at an age of up to 18 years to I-131 released during the Chernobyl NPS
accident. Differences in equipment and study protocol in the two surveys were taken into account.
Radiation risk of thyroid cancer incidence among survivors of the atomic bombings of Hiroshima and
Nagasaki and preliminary estimates of thyroid dose due to the Fukushima accident were used for the
prediction of baseline and radiation-related thyroid cancer risks. We estimate a prevalence of thyroid
cancer of 0.034% (95% CI: 0.009%; 0.085%) for the first screening campaign in the Fukushima Prefecture.
Compared to the incidence rate in Japan in 2007, the ultrasonography survey is predicted to increase
baseline thyroid cancer incidence by a factor of 7.4 (95% CI: 0.95; 17.3). Under the condition of continued
screening, thyroid cancer during the first fifty years after the accident is predicted to be detected for about
2% of the screened population. The prediction of radiation-related thyroid cancer in the most exposed
fraction (a few ten thousand persons) of the screened population of the Fukushima Prefecture has a large
uncertainty with best estimates of the average risk of 0.1% to 0.3%, depending on average dose.
(S3002) Dose estimates for the population of the Fukushima Prefecture. Mikhail Balonov, Institute of
Radiation Hygiene, Petersburg, Russian Federation
The population of the Fukushima Prefecture was subjected to radiation exposure since 2011 and
afterwards following large releases of radionuclides from four reactors of Fukushima-1 NPP damaged
because of severe earthquake and tsunami that occurred on 11 March, 2011. Radioactive releases from
the damaged reactors to atmosphere lasted about three weeks and included radionuclides of volatile
elements, iodine, tellurium and cesium, as well as inert gases. The total ground deposition of radiologically
important airborne Cs-134 and Cs-137 radionuclides in Japan was about an order of magnitude lower than
that in Europe after the Chernobyl accident in 1986. Thyroid doses incurred by the residents of Japan in
March-April 2011 due to intake of I-131 via inhalation and ingestion were the largest in human body.
Radiation doses in other organs and tissues were similar in various organs and tissues; they are gradually
accumulated due to longer term external exposure from Cs-134 and Cs-137 deposited in the environment
and, to less extent, due to ingestion of the same radionuclides. The contribution of short-lived
radionuclides to external dose incurred in 2011 was about 20%. From the semicircle area around
This session will focus on the Fukushima accident in regard to population dosimetry,
ultrasonography surveys on thyroid cancer incidence, and psychosocial effects; the integration of
molecular data in evaluation of thyroid cancer risk in a cohort of Ukrainians exposed after Chernobyl to
131I, and risk of thyroid cancer after exposure in adulthood.
(S3001) Ultrasonography surveys and thyroid cancer after the Fukushima Daiichi accident.
Peter Jacob; Jan Christian Kaiser; and Alexander Ulanousky, Helmholtz Zentrum Muenchen, Neuherberg,
Germany
Thyroid cancer is one of the major health concerns after the accident in the Fukushima Dai-ichi
nuclear power station. Currently, ultrasonography surveys are being performed for persons residing in
the Fukushima Prefecture at the time of the accident with an age of up to 18 years. We assessed the
expected thyroid cancer prevalence in the Fukushima Prefecture based on an ultrasonography survey of
Ukrainians, who were exposed at an age of up to 18 years to I-131 released during the Chernobyl NPS
accident. Differences in equipment and study protocol in the two surveys were taken into account.
Radiation risk of thyroid cancer incidence among survivors of the atomic bombings of Hiroshima and
Nagasaki and preliminary estimates of thyroid dose due to the Fukushima accident were used for the
prediction of baseline and radiation-related thyroid cancer risks. We estimate a prevalence of thyroid
cancer of 0.034% (95% CI: 0.009%; 0.085%) for the first screening campaign in the Fukushima Prefecture.
Compared to the incidence rate in Japan in 2007, the ultrasonography survey is predicted to increase
baseline thyroid cancer incidence by a factor of 7.4 (95% CI: 0.95; 17.3). Under the condition of continued
screening, thyroid cancer during the first fifty years after the accident is predicted to be detected for about
2% of the screened population. The prediction of radiation-related thyroid cancer in the most exposed
fraction (a few ten thousand persons) of the screened population of the Fukushima Prefecture has a large
uncertainty with best estimates of the average risk of 0.1% to 0.3%, depending on average dose.
(S3002) Dose estimates for the population of the Fukushima Prefecture. Mikhail Balonov, Institute of
Radiation Hygiene, Petersburg, Russian Federation
The population of the Fukushima Prefecture was subjected to radiation exposure since 2011 and
afterwards following large releases of radionuclides from four reactors of Fukushima-1 NPP damaged
because of severe earthquake and tsunami that occurred on 11 March, 2011. Radioactive releases from
the damaged reactors to atmosphere lasted about three weeks and included radionuclides of volatile
elements, iodine, tellurium and cesium, as well as inert gases. The total ground deposition of radiologically
important airborne Cs-134 and Cs-137 radionuclides in Japan was about an order of magnitude lower than
that in Europe after the Chernobyl accident in 1986. Thyroid doses incurred by the residents of Japan in
March-April 2011 due to intake of I-131 via inhalation and ingestion were the largest in human body.
Radiation doses in other organs and tissues were similar in various organs and tissues; they are gradually
accumulated due to longer term external exposure from Cs-134 and Cs-137 deposited in the environment
and, to less extent, due to ingestion of the same radionuclides. The contribution of short-lived
radionuclides to external dose incurred in 2011 was about 20%. From the semicircle area around
