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1دورية أكاديمية
المؤلفون: Ishikawa, Tetsuo, Takahashi, Hideto, Yasumura, Seiji, Ohtsuru, Akira, Sakai, Akira, Ohira, Tetsuya, Sakata, Ritsu, Ozasa, Kotaro, Akahane, Keiichi, Yonai, Shunsuke, Kurihara, Osamu, Kamiya, Kenji, Abe, Masafumi, 石川, 徹夫, 高橋, 秀人, 安村, 誠司, 大津留, 晶, 坂井, 晃, 大平, 哲也, 神谷, 研二, 阿部, 正文
مصطلحات موضوعية: nuclear disaster, external dose, response rate, representativeness, equivalence test, Female, Fukushima Nuclear Accident, Health Behavior, Health Surveys, Humans, Japan, Male, Radiation Dosage, Radiation Monitoring
الوصف: After the Fukushima Dai-ichi Nuclear Power Plant accident, the Fukushima Health Management Survey (FHMS) was launched. The Basic Survey, a component of FHMS, is a questionnaire used to survey residents across the Fukushima Prefecture about their behaviour in the first 4 months after the accident. The questionnaire findings are used to determine individual external doses by linking behaviour data to a computer programme with daily gamma ray dose rate maps, drawn after the accident. Through 30 June 2015, the response rate was only 27.2% (558 550 population), indicating that the findings might not be generalisable because of poor representativeness of the population. The objective of this study was to clarify if the data from the FHMS Basic Survey were representative of the entire population, by conducting a new survey to compare the external doses between non-respondents and respondents in the previous survey. A total of 5350 subjects were randomly selected from 7 local regions of Fukushima Prefecture. An interview survey was conducted with the non-respondents to the FHMS Basic Survey. A total of 990 responses were obtained from the previous non-responders by interview survey. For the regions Kempoku, Kenchu, Kennan, Aizu, Minami-Aizu, Soso, and Iwaki, differences in mean effective dose (95% confidence interval) in mSv between the non-responders and previous responders were 0.12 (0.01-0.23), -0.09 (-0.21-0.03), -0.06 (-0.18-0.07), 0.05 (-0.04-0.14), 0.01 (-0.01-0.02), 0.09 (0.01-0.17), 0.09 (0.00-0.17), respectively. The differences fall neither within the interval (-∞, -0.25) nor within the interval (0.25, ∞). These findings imply that mean effective doses between the previous and new respondents were not different, with a significantly indifferent region of 0.25 mSv according to equivalence tests. The present study indicates that the dose distribution obtained from about one-quarter of Fukushima residents represents the dose distribution for the entire Fukushima Prefecture.
وصف الملف: application/pdf
العلاقة: https://doi.org/10.1088/1361-6498/aa6649Test; Journal of radiological protection. 2017-09-25; 37(3): p.584-605.; urn:ISSN:0952-4746; urn:ISSN:1361-6498; info:ncid/AA10758944; info:pmid/28617669; http://ir.fmu.ac.jp/dspace/handle/123456789/1577Test; http://ir.fmu.ac.jp/dspace/bitstream/123456789/1577/1/JRadiolProt_37_p584.pdfTest
الإتاحة: https://doi.org/10.1088/1361-6498/aa6649Test
http://ir.fmu.ac.jp/dspace/handle/123456789/1577Test
http://ir.fmu.ac.jp/dspace/bitstream/123456789/1577/1/JRadiolProt_37_p584.pdfTest -
2دورية أكاديمية
المؤلفون: Kim, Eunjoo, Igarashi, Yu, Hashimoto, Shozo, Tani, Kotaro, Kowatari, Munehiko, Ishikawa, Tetsuo, Kurihara, Osamu, 石川, 徹夫
مصطلحات موضوعية: Fukushima, thyroid equivalent dose, 131I, ATDM, Adult, Child, Fukushima Nuclear Accident, Humans, Iodine Radioisotopes, Japan, Radiation Dosage, Radiation Monitoring, Thyroid Gland, stat, geo
الوصف: It has been challenging to obtain reliable estimates of thyroid equivalent doses (TEDs) to residents involved in the 11 March 2011 Fukushima Daiichi Nuclear Power Plant (FDNPP) accident because of the shortage of direct human measurements associated with 131I, the largest contributor to the dose of concern. The present study attempted to perform the estimation of the TEDs by inhalation of 131I to residents from Namie-town, one of the most radiologically-affected municipalities, by means of the latest atmospheric transport and dispersion model (ATDM) simulations with the Worldwide version of System for Prediction of Environmental Emergency Dose Information (WSPEEDI) ver. 2, coupled with personal behavioral data containing the history of the whereabouts of individuals shortly after the accident. We analyzed 1,637 residents who underwent direct measurements with whole-body counters several months after the accident and provided their personal behavioral data. We divided the subjects into two groups based on whether the distances between their locations and the FDNPP were >20 km as of 15:00 on 12 March in relation to the timepoint of the hydrogen explosion at the Unit 1 Reactor building. As a result, the 90th percentile TEDs of the 1,249 prompt evacuees and 388 late evacuees were 3.9 mSv (adult)-6.8 mSv (10-y-old) and 24.1 mSv (adult)-35.6 mSv (5-y-old), respectively, excluding 16 persons whose TEDs exceeded 50 mSv. The 90th percentile (median) TEDs to 1-y-old children (not included in the subjects) for the prompt and late evacuation groups were 8.1 (1.0) mSv and 36.3 (19.7) mSv, respectively. Additionally, this study provided the evidence to support the view that the explosive event at the Unit 1 Reactor building on the afternoon of 12 March 2011 could have caused the critical group among Namie-town's residents, whereas the largest release event on 15 March gave relatively small doses to the residents because their exposure took place mostly at sites that were distant from the FDNPP. However, the present dose .
العلاقة: http://ir.fmu.ac.jp/dspace/bitstream/123456789/1950/1/HealthPhys_122_p313.pdfTest; http://ir.fmu.ac.jp/dspace/handle/123456789/1950Test
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3دورية أكاديمية
المؤلفون: Kim, Eunjoo, Igarashi, Yu, Hashimoto, Shozo, Tani, Kotaro, Ishikawa, Tetsuo, Kowatari, Munehiko, Kurihara, Osamu, 石川, 徹夫
مصطلحات موضوعية: Fukushima, early internal dose, 137Cs, ATDM, Adult, Cesium Radioisotopes, Fukushima Nuclear Accident, Humans, Japan, Nuclear Power Plants, Radiation Monitoring, Whole-Body Counting
الوصف: More than 9 y have passed since the 2011 nuclear disaster in Fukushima Prefecture, Japan. During this period, much effort has been spent on the dose reconstruction for Fukushima residents; however, the estimation of the internal dose due to the potential intake of the short-lived radionuclides (mainly iodine-131) has been challenging because of the lack of direct human measurements at the early phase of the accident. Our previous study revealed that the residual cesium body contents observed in delayed whole-body counter (WBC) measurements of residents from Namie-town, one of the most affected municipalities, varied greatly with the timepoint of their evacuations on 12 March 2011 when the first explosive event occurred at the accident site; i.e., the late evacuees had much higher residual cesium body contents compared to the prompt evacuees. The present study thus aimed to clarify this finding by reproducing the exposure situation based on the evacuees' personal behavioral data in combination with the latest atmospheric transport and dispersion model (ATDM) simulation for 356 selected subjects in adult and 15-y (13-17 y) age groups. The results demonstrated that the ATDM simulation-based method could reasonably reproduce the subjects' exposure situation, supporting the previous finding. However, the residual cesium-137 body contents calculated by this method were only 10%-20% of those in the subjects' WBC measurements. This large discrepancy was considered to be caused by both the present method's underestimation and the overestimation of the subjects' early intake in the WBC measurements due to a conservative intake scenario not assuming potential additional intake. Additional studies are needed to further clarify the reasons for the discrepancy and to evaluate the magnitude of the inhalation dose in the accident.
وصف الملف: application/pdf
العلاقة: https://doi.org/10.1097/HP.0000000000001429Test; Health physics. 2021-08; 121(2): p.133-149.; urn:ISSN:0017-9078; urn:ISSN:1538-5159; info:ncid/AA00662510; http://ir.fmu.ac.jp/dspace/handle/123456789/1867Test; http://ir.fmu.ac.jp/dspace/bitstream/123456789/1867/1/HealthPhys_121_p133.pdfTest
الإتاحة: https://doi.org/10.1097/HP.0000000000001429Test
http://ir.fmu.ac.jp/dspace/handle/123456789/1867Test
http://ir.fmu.ac.jp/dspace/bitstream/123456789/1867/1/HealthPhys_121_p133.pdfTest -
4دورية أكاديمية
المؤلفون: Igarashi, Yu, Kim, Eunjoo, Hashimoto, Shozo, Tani, Kotaro, Yajima, Kazuaki, Iimoto, Takeshi, Ishikawa, Tetsuo, Akashi, Makoto, Kurihara, Osamu, 石川, 徹夫
مصطلحات موضوعية: Fukushima, nuclear accident, internal dose, cesium, whole-body counter, evacuation, Adolescent, Adult, Cesium Radioisotopes, Child, Preschool, Disaster Planning, Female, Fukushima Nuclear Accident, Humans, Male, Radiation Dosage, Radiation Exposure, Radiation Monitoring, Time Factors, Whole-Body Counting
الوصف: Estimating the internal thyroid dose received by residents involved in the 2011 Fukushima Daiichi Nuclear Power Plant (FDNPP) accident has been a challenging task because of the shortage of direct human measurements related to the largest contributing radioisotope to the dose, I. In a previous dose estimation, we used the results of whole-body counter (WBC) measurements targeting Cs and Cs, based on the assumption that these radioisotopes were incorporated at the same time as I in the early phase of the accident. The main purpose of this study was to clarify whether the trace of the early intake remained in the WBC measurements that were started several months after the accident. In the present work, WBC data of 1,639 persons from Namie town, one of the heavily contaminated municipalities, were analyzed together with their evacuation behavior data. The results demonstrated that the cesium detection rate in the WBC results was several times higher in the late evacuees [who evacuated outside the 20-km radius of the FDNPP at 3:00 p.m. (Japanese Local Time) on 12 March or later] compared to the prompt evacuees (who evacuated before 3:00 p.m. on 12 March). Among the adults, the cesium detection rates (and the 90th percentile values of the Cs intake) of the prompt and late evacuees were about 20% (5.4 × 10 Bq) and 60% (1.6 × 10 Bq), respectively. Approximately 20% of the individuals analyzed were categorized as late evacuees. These differences in cesium would be caused by exposure to the radioactive plume in the afternoon on 12 March, which was likely to influence the late evacuees. On the other hand, the intake on 15 March, when the largest release event occurred, was expected to be relatively small for Namie town's residents. In conclusion, the trace of the early intake remained in the WBC measurements, although this would not necessarily be true for all subjects. The results obtained from this study would provide useful information for the reconstruction of the early internal thyroid doses from radioiodine in the ...
وصف الملف: application/pdf
العلاقة: https://doi.org/10.1097/HP.0000000000001249Test; Health physics. 2020-12; 119(6): p.733-745.; urn:ISSN:0017-9078; urn:ISSN:1538-5159; info:ncid/AA00662510; info:pmid/32384372; http://ir.fmu.ac.jp/dspace/handle/123456789/1592Test; http://ir.fmu.ac.jp/dspace/bitstream/123456789/1592/1/HealthPhys_119_p733.pdfTest
الإتاحة: https://doi.org/10.1097/HP.0000000000001249Test
http://ir.fmu.ac.jp/dspace/handle/123456789/1592Test
http://ir.fmu.ac.jp/dspace/bitstream/123456789/1592/1/HealthPhys_119_p733.pdfTest -
5دورية أكاديمية
المؤلفون: Kunishima, Naoaki, Kurihara, Osamu, Kim, Eunjoo, Ishikawa, Tetsuo, Nakano, Takashi, Fukutsu, Kumiko, Tani, Kotaro, Furuyama, Kazuo, Hashimoto, Shozo, Hachiya, Misao, Naoi, Yutaka, Akashi, Makoto, 石川, 徹夫
مصطلحات موضوعية: Fukushima Dai-ichi Nuclear Power Plant, personal behavior, committed effective dose, internal dose, Adolescent, Adult, Cesium Radioisotopes, Child, Female, Fukushima Nuclear Accident, Humans, Japan, Male, Radiation Exposure, Radiation Monitoring, Young Adult
الوصف: The Tokyo Electric Power Company's Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident exposed members of the public to radiation. This study analyses the relation between personal behavior data obtained from 112 out of 174 subjects who underwent whole-body measurements by the National Institute of Radiological Sciences (NIRS) during the period from 27 June to 28 July 2011 and their committed effective doses (CEDs) from Cs and Cs. The whereabouts of the 112 persons living in municipalities near the FDNPP (mainly, Namie town) on several days in March 2011 are graphed on maps. It was confirmed that most subjects started evacuation promptly and had left the 20-km-radius of the FDNPP by the end of 12 March. The individual CEDs were poorly correlated with the person's distances from the FDNPP at any day in March. Meanwhile, the percentage of persons remaining within the 20-km radius of the FDNPP was 100% at 16:00 on 12 March and 42.9% at 0:00 on 15 March for those with CEDs > 0.1 mSv, whereas the corresponding values were much lower for those with CEDs ≤ 0.1 mSv. This suggests that the time of evacuation would be one of the crucial factors for the early intake; however, more personal behavior data are needed to be analyzed to clarify the relevance to the individual internal dose.
وصف الملف: application/pdf
العلاقة: https://doi.org/10.1097/HP.0000000000000657Test; Health physics. 2017-06; 112(6): p.512-525.; urn:ISSN:0017-9078; urn:ISSN:1538-5159; info:ncid/AA00662510; info:pmid/28441283; http://ir.fmu.ac.jp/dspace/handle/123456789/1579Test; http://ir.fmu.ac.jp/dspace/bitstream/123456789/1579/1/HealthPhys_112_p512.pdfTest
الإتاحة: https://doi.org/10.1097/HP.0000000000000657Test
http://ir.fmu.ac.jp/dspace/handle/123456789/1579Test
http://ir.fmu.ac.jp/dspace/bitstream/123456789/1579/1/HealthPhys_112_p512.pdfTest
