著者

長岡 和則 佐藤 昭二 山中 武 大西 由子

出版者

日本保健物理学会

雑誌

保健物理 : hoken buturi (ISSN:03676110)

巻号頁・発行日

vol.44, no.1, pp.66-71, 2009-03-01

参考文献数

20

被引用文献数

2

---

In order to estimate the environmental radiation dose rate level, measurements of the terrestrial gamma ray dose rates and cosmic ray ionizing components were conducted in public places such as park, street and train in Tokyo area. Measurements for 10 s with a NaI(Tl) scintillation spectrometer were repeatedly carried out with walking. Terrestrial gamma ray dose rate ranges from 10 nSv/h in a train to 80 nSv/h on the stone road. Although cosmic ray ionizing component was constantly 30 nSv/h in the outdoor, reductions by shielding effect were observed at underground and in the concrete building. Influence of radiopharmaceutical was measured in the stations where so many people exist. This shows that the same effect may occur in the environmental radiation monitoring.

著者

草間 朋子 中川 健朗 吉澤 康雄

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.20, no.4, pp.399-406, 1985 (Released:2010-02-25)

参考文献数

24

被引用文献数

1

---

The concept of population dose is of importance and of interest at the point of radiation protection of puplic. We devided it into two categories, source-related population dose and individual-related population dose, and estimated each population dose of Japan. We surveyed all sources that caused exposure to Japanese population. A number of sources, both naturally-occuring and man-made, contributed to population exposure. According to source-related dose assessment, average annual effective dose equivalent was about 3.3mSv, and about half of which, i. e. 1.6mSv, was given from medical exposure. And from the results of individual-related dose assessment we proposed the allocation of the annual dose limit of public for each controllable source, that is, 2.5mSv/yr to nuclear faculties, 1.0mSv/yr to miscellaneous sources, 1.5mSv/yr to probablistic exposure.

著者

Jacques LOCHARD Ryoko ANDO Hiroshi TAKAGI Shinya ENDO Maiko MOMMA Makoto MIYAZAKI Yujiro KURODA Takeshi KUSUMOTO Masako ENDO Setsuko ENDO Yohei KOYAMA

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.56, no.1, pp.39-52, 2021-03-31 (Released:2021-05-26)

参考文献数

26

著者

藤原 慶子 山崎 敬三 高橋 知之 高橋 千太郎 北川 晃三 神藤 克人

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.47, no.4, pp.282-285, 2012 (Released:2013-12-17)

参考文献数

8

被引用文献数

1

---

After the Fukushima Daiichi Nuclear Power Plant Accident, many people are concerned about the contamination of radioactive substances in their ordinary surrounding environment. In this study, we determined the levels of radioactive contamination with 137Cs in towels, very common textile products in our life, after exposing those to the soil collected from a farm field near Fukushima city. Three kinds of towels made from the same cotton fiber with different thickness were exposed to the soil under dry or water-suspension conditions. The radioactivities of 137Cs retained/absorbed were 30-50% of the loaded radioactivity per gram weight of the towel. When their weight and absorbency are taken into consideration, the differences in thickness did not so much affect the above values. Under standard washing condition, which mimic those with household washing machine, almost all the radioactive cesium were removed from the towels contaminated under the dry conditions, whereas only 50-70% were removed when the towels were contaminated under the wet conditions. A commercial soil-release treatment (Preshade-SR) didn't reduce the contamination under both dry and wet conditions, although processing the towels with silver nano-particles did.

著者

渡部 輝久

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.41, no.4, pp.221-233, 2006 (Released:2010-08-05)

参考文献数

25

---

Environmental protection is one of the key issues in the prospective policy and strategy of radiation protection. In this context, numerous efforts have been made for developing the framework for the protection of non-human species from ionizing radiation, especially in European countries and Unite States. The present report summarizes knowledge so far attained on the assessment of doses and radiation impact on marine organisms. Special attention was directed to the methodology for calculating absorbed doses of marine organisms, based on which a case study was also carried out for estimating absorbed dose rate of several species of marine organisms inhabiting in the coastal sea off Rokkasho-Mura, Aomori Prefecture where a spent nuclear fuel reprocessing plant came into operation.

著者

吉澤 道夫 辻村 憲雄

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.36, no.1, pp.18-23, 2001 (Released:2010-02-25)

参考文献数

8

被引用文献数

1

著者

谷川 攻一

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.53, no.2, pp.45-46, 2018 (Released:2018-09-13)

参考文献数

2

被引用文献数

1

著者

竹安 正則 住谷 秀一 古田 定昭

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.48, no.3, pp.141-149, 2013 (Released:2013-12-10)

参考文献数

13

被引用文献数

1

---

On the basis of the measurement results of airborne radionuclide concentrations in the Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency, the committed effective dose to adults and the committed equivalent dose to thyroid of infants by inhalation were estimated for various indoor and outdoor exposure scenarios. It was demonstrated that the indoor to outdoor airborne radionuclide concentration ratio had a dominant effect on the dose estimate. The committed effective dose to adults was estimated to 0.098 mSv, and the committed equivalent dose to thyroid of infants was 1.8 mSv. These doses were about 1/6 and about 1/9, respectively, compared to the provisional ones with such assumptions as continuous outdoor stay.

著者

石原 弘

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.46, no.3, pp.179-183, 2011 (Released:2012-07-28)

参考文献数

1

被引用文献数

1

著者

草間 朋子

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.35, no.1, pp.91-93, 2000 (Released:2010-02-25)

被引用文献数

1

著者

山崎 興樹

出版者

日本保健物理学会

雑誌

保健物理 : hoken buturi (ISSN:03676110)

巻号頁・発行日

vol.43, no.2, pp.112-121, 2008-06

著者

外川 織彦

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.27, no.1, pp.27-32, 1992 (Released:2010-02-25)

参考文献数

17

被引用文献数

1

---

Internal dose coefficients for ingestion and inhalation of radioiodine were preliminarily calculated considering the metabolic characteristics of Japanese. In the calculation, the fractional uptake by thyroid (f) of iodine entering blood and biological half-life in thyroid (Tb) were reflected among the data peculiar to Japanese concerning thyroid structure and iodine metabolism in thyroid. A metabolic model for iodine used here was based on the three-compartment recycle model described in the ICRP Publication 30. As to the parameters of f and Tb, the values of 0.2 and 40 days reported for Japanese were used instead of those of 0.3 and 80 days adopted by ICRP.The dose coefficients for Japanese calculated here are smaller than those for Reference Man of Caucasian. The author expects that the coefficients will be used for radiation protection purpose for workers and adults of the public in Japan.

著者

仁志田 昇司

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.51, no.4, pp.207-208, 2016 (Released:2017-02-02)

被引用文献数

1

著者

谷村 嘉彦 富田 純平 吉富 寛 吉澤 道夫 箱崎 亮三 高橋 荘平

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.51, no.3, pp.141-146, 2016 (Released:2016-11-18)

参考文献数

10

被引用文献数

3

---

Photon spectra were measured inside and outside a house in Minami-Soma city by using a NaI(Tl) scintillation spectrometer. The photons were categorized into three groups according to their energy. The groups were (1) scattered photons, which include low energy photons, (2) direct photons from 134Cs and 137Cs sources and (3) the other photons. Then the ratios of the ambient dose equivalents H*(10) of the scattered photons to those of the direct photons from the 134Cs and 137Cs sources have been evaluated from the measured photon spectra. The ratios are high inside the house compared with those out of the house. It was found that the scattered photons contribute to the H*(10) by more than 50% inside the house. The ambient dose equivalent average energies of the scattered photons are around 0.25 MeV both inside and outside the house. These data is worthwhile to design the optimum shielding for the protection against the public radiation exposure.

著者

日本保健物理学会医療放射線リスク専門研究会

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.46, no.1, pp.42-51, 2011 (Released:2012-01-25)

参考文献数

20

被引用文献数

1

---

Radiation use in medicine generally gives us the benefit that outweighs the risk. However, some patients are much concerned about the risk while some medical people are unaware of radiation risk. The aim of this report is to review the low dose risk not only in the reports of ICRP, UNSCEAR, BEIR and French academy but also in the scientific papers that have been paid attention to. On these bases, we discuss the low dose risk and how we face the risk in medicine in order to go for medical use of radiation to the right way. In particular, we hope this report will support medical people as well as radiation protection experts should understand the radiation risk in medicine on current scientific basis.

著者

安東 量子 小山 良太 ティエリー・ シュナイダー ジャン゠フランソワ・ ルコント 一瀬 昌嗣 児山 洋平

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.57, no.2, pp.102-107, 2022-09-02 (Released:2022-10-19)

参考文献数

2

著者

JAEA大洗プルトニウム 汚染事故ワーキンググループ 岩井 敏 佐々木 道也 桧垣 正吾 山西 弘城 甲斐 倫明

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.53, no.4, pp.271-281, 2018 (Released:2019-03-03)

参考文献数

15

被引用文献数

1

---

On June 6, 2017, in the hood of the analyzing room at Plutonium Fuel Facility of Oarai Research and Development Center in Japan Atomic Energy Agency, five workers were checking the storage container of fast reactor nuclear fuel material. Around 11:15 a.m., vinyl bags in the container of the fuel material including plutonium and enriched uranium burst during the inspection work. All the workers heard the bang; which caused misty dust leakage from the container. This event caused significant skin α-contamination for four workers and nasal cavity α-contamination for three workers. Decontamination was conducted for workers in the shower room. Then, the five workers were transferred to the Nuclear Fuel Cycle Engineering Laboratory to evaluate inhalation intake of plutonium etc. in lungs. The maximum values of 2.2 × 104 Bq for 239Pu and 2.2 × 102 Bq for 241Am were estimated by the lung monitor. From these results, injection of chelate agent was conducted for prompt excretion of plutonium etc. Next morning, the five workers were transferred to the National Institute of Radiological Sciences for treatments including decontamination of their skin and measurement by lung monitor. Then no obvious energy peak was confirmed for plutonium. The Japan Health Physics Society launched the ad-hoc working group for plutonium intake accident around the middle of June to survey issues and to extract lessons on radiological protection. We will report the activity of the working group.

著者

浜田 信行

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.53, no.2, pp.116-118, 2018 (Released:2018-09-13)

参考文献数

14

被引用文献数

1

著者

斎藤 公明

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.46, no.3, pp.210-214, 2011 (Released:2012-07-28)

被引用文献数

4 5

著者

藤高 和信

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.31, no.4, pp.463-471, 1996 (Released:2010-02-25)

参考文献数

25

被引用文献数

1 1

---

Exposure to cosmic rays in commercial airplanes was outlined. Although cosmic rays are a type of natural radiation, the magnitude of their dose is significant in airplanes. Therefore, there may be demands to regulate the dose of cosmic rays received by aircrews. In order to find reasonable countermeasures, the first prerequisite is to estimate the dose of cosmic rays precisely. In this paper, various problems in the measurement and calibration of cosmic rays as well as dose estimation and the method of control were outlined. Data of in situ measurements and those obtained by model calculations are presented, and factors which affect the level of the dose are discussed. In addition, potential dose ranges received during various flight routes are shown for various dose conversion parameter sets. Characteristics of domestic flights in Japan are also mentioned.