著者

中野 政尚 國分 祐司 武石 稔

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.60-65, 2009-03

被引用文献数

4

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The tritium concentrations in seawater collected around the Tokai Reprpcessing Plant (TRP) were measured for 10,800 samples in 30 years from 1978. The tritium concentration, dillution factor and diffusion situation were investigated. As a result, the tritium was occationaly detected due to the discharge from TRP. But it was considered to be the result of expected diffusion assumed in the safety assessment. It was confirmed that the tritium concentration was much lower than the concentration limit defined in the law and that it was not concern of environmental safety.

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

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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

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

古田 悦子 中原 弘道

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.4, pp.341-348, 2008-12

被引用文献数

2 4

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Cosmetics claiming hormesis effects are available through Internet. Although the hormesis effect is explained in each product of cosmetics, there is no explanation about the radiation source. The existence of the progeny nuclides of Th and U series (RI) was comfirmed by the γ-ray spectroscopy using a HPGe detector. The highest radioactivity densities were 68Bq/g of the Th-series included in the hormesis powder. Because the particles containing RI were of the size of 1-10 micrometer by observing and analyzing SEM-EDX, there is a risk of inhaling the powder to the deep into the lungs. Furthermore, as about 1% RI was dissolved in water, the uptake of the RI to the body would be possible. The highest value of the evaluation of uniform radiation exposure to some organs by the continuous usage for 10 years was 5.5mSv/y of the hormesis powder inhalation to the lung. Furthermore, the calculated quantity of the radioactivity of progeny of ^<222>Rn deposited in the body after continuous use of the hormesis cream every day for one year becomes 24Bq. The possibility of accumulation of the radioactivity in the body from the hormesis cosmetics cannot be denied. The addition of the radioisotope to cosmetics is prohibited in some EU countries by the regulation. It's proposed in this paper that the legitimacy of the addition of the radioisotope should be seriously re-examined.

著者

古田 定昭

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.41, no.1, pp.9-10, 2006-03-01

著者

古田 悦子 森田 裕子 吉沢 幸夫

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.42, no.4, pp.341-348, 2007-12

被引用文献数

1 2

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Internal exposure to alpha particles emitted from <222>^Rn (radon) and its daughters is the second leading cause of lung cancer. As a source of indoor radon in home, there are interior building materials that contain radioactive minerals. These radioactive consumer products have been claimed by distributors to have effect of "minus-ion" or "radon spring" for healthy promotion. We analyzed radioactive nuclides contained in the interior building materials, and measured radon levels released from them. The results of gamma-ray spectrometry revealed that these interior building materials contain U- and Th-series nuclides. The densities of some radioactive nuclides in the tile used for a bathroom exceeded the exempt limits of International Basic Safety Standards. However, the radon densities released from the tile was lower than detectable limit. In contrast, one of the wallpaper released 34Bq・m^<-3> of radon gas in a 50-liter container. This value is two times higher than the average radon level in Japanese homes. The "minus-ion effect" wallpapers are thought to be a cause of residential exposure to radon.

著者

嶋田 和真

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.42, no.2, pp.135-136, 2007-06

著者

緒方 裕光 馬替 純二

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.40, no.4, pp.331-340, 2005-12-01

参考文献数

58

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In this paper, an outline of the biological and epidemiological evidence for radiation protection is presented together with the strengths and limitations of these studies in radiation risk evaluation. Various types of research can provide useful information to complement the risk estimates based on atomic-bomb survivor studies, particularly the effects of low-dose and lowdose rate radiation. Some basic issues in synthesizing scientific information for radiation risk evaluation are also discussed.

著者

佐々木 康人 小田 啓二 甲斐 倫明 酒井 一夫 桐生 康生 宮崎 振一郎 米原 英典

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.3, pp.191-210, 2008-09

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The International Commission on Radiological Protection (ICRP) published the 2007 Recommendation of ICRP as the publication 103 of Annals of ICRP at the end of the year 2007. Owing to the transparency of revision process for the 1990 recommendation (Publ. 60) the understanding of as well as the interest in the new recommendation prevailed widely in the past 9 years. The Japan Health Physics Society (JHPS) made contribution to the revision by providing valuable comments on the drafts. Now members of the society are expected to express their insights on the future regulatory aspects of radiological protection and safety based on deep understanding of the new recommendations. In this issue of the Japanese Journal of Health Physics authors who participated in the Symposium of JHPS describe various aspects of new recommendations and its applications to future regulations in Japan. The authors wish that this article will help members of JHPS for better perception of the new recommendation and deep insight on the new principles of radiological protection and their application to regulations.

著者

荻野 晴之

出版者

Japan Health Physics Society

雑誌

保健物理 : hoken buturi (ISSN:03676110)

巻号頁・発行日

vol.46, no.4, pp.283-287, 2011-12-01

参考文献数

11

被引用文献数

1

著者

岩崎 民子

出版者

Japan Health Physics Society

雑誌

保健物理 : hoken buturi (ISSN:03676110)

巻号頁・発行日

vol.31, no.2, pp.155-160, 1996-06

著者

八田 昌久

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.39, no.1, pp.7-8, 2004-03-01

著者

Kosako Toshiso Sugiura Nobuyuki Yonehara Hidenori OKOSHI Minoru NAKAI Kunihiro

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.40, no.1, pp.67-78, 2005-03

被引用文献数

1 1

---

Some of technologically enhanced naturally occurring radioactive material (TENORM), such as radon and monazite sand, gradually became a target for radiological protection. In order to regulate TENORM safely and economically, it is essential to consider the characteristics of TENORM such as ubiquity, huge volume, and very low activity levels. In this paper, radiation protection principles and standards for NORM/TENORM are summarized based on the reports published by the international organizations (e.g. ICRP and IAEA) to assist the development of national regulatory framework. The survey results on the present Japanese situations on industries related to NORM/TENORM are provided, and the categorization for NORM/TENORM, which is established by the Radiation Council of Japan, is explained how to control NORM/TENORM based on their exposure doses instead of their activity levels. Finally, basic processes to solve the problems related to NORM/TENORM are discussed.

著者

斉藤 卓也

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.39, no.2, pp.79-82, 2004-06

参考文献数

3

被引用文献数

1

著者

森内 茂 堤 正博 斎藤 公明

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.42, no.1, pp.71-83, 2007-03

被引用文献数

4

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Gamma ray spectra analyses using unfolding techniques and the dose evaluation are performed widely in the fields of environmental radiation monitoring and the relating environmental research. Various sizes and the shapes of NaI (Tl) scintillation detectors can be used depending on the dose levels. However, available response functions are generally limited to 3"φ×3" cylindrical and 3"φ spherical types and the energy range is roughly up to 3 MeV. In this paper, the response functions of eight types of cylindrical and spherical NaI (Tl) scintillation detectors (1"φ×1", 2"φ×2", 3"φ×3", 4"φ×4", 5"φ×4" cylindrical, and 2"φ, 3"φ, 5"φ spherical) were determined. The energy ranges were extended to 10 MeV in maximum. The some response functions reported in literatures were unfolded using our response matrices for comparison and the relative characteristics were discussed.

著者

加藤 朗

出版者

Japan Health Physics Society

雑誌

保健物理 : hoken buturi (ISSN:03676110)

巻号頁・発行日

vol.33, no.4, pp.425-427, 1998-12-01

著者

五代儀 貴

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.39, no.3, pp.220-230, 2004-09-01

参考文献数

16

被引用文献数

1 1

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We are collecting sociological data in relation to the estimation of radiation dose by radionuclides released from the nuclear fuel cycle facilities in Rokkasho-mura, Aomori Prefecture. This survey on the daily food intake by infants in Aomori Prefecture over a two-year period (1995-1996) is a continuation of a previous survey on individuals (&ge;5 years old). We investigated 179 infants in the age group around 4 years old and 181 infants in the age group around 1 year old. They were living in families belonging to three different groups of primary occupations: fishery workers, farmers and other occupations. The average total daily food consumption of the age group around 4 years old was about 958 grams/day/person (g/d/p), which was weighted according to the number of families in each of the three types of occupations in Aomori Prefecture. There was no significant difference shown for occupation and area. The consumption rates of marine, agricultural and livestock products and other products were around 45, 388, 256 and 268g/d/p, respectively. Families of fishery workers showed a higher consumption of marine products, and families of farmers showed a higher consumption of agricultural products. The average total daily food consumption of the age group around 1 year old was about 627g/d/p. The consumption rates of marine, agricultural and livestock products and other products were around 26, 251, 201 and 150g/d/p, respectively. Compared with individuals over 5 years old, food consumption of the age group around 4 years old was about one-half, and the age group around 1 year old was about one-third. Consumption rates of marine products and agricultural products were low, and livestock products and other products were high in infants. As the age group became lower, the ratio of the quantity of dairy products became higher.

著者

實重 宏明

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.40, no.3, pp.277-281, 2005-09

著者

細田 正洋 石川 徹夫 床次 眞司 金賀 愛子 伊藤 亮輔 内田 直希 荻原 俊輔 笠 喜洋 川内 隆行 石井 忠

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.42, no.3, pp.221-226, 2007-09

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The bio-kinetics of radon ingested from drinking water was investigated for eight Japanese subjects. A whole-body counter at National Institute of Radiological Sciences (NIRS) was used for the measurement of the ^<214>Bi transfer half-life from the stomach to the small intestine. The transfer half-life seemed to be affected by water quality (chemical/physical properties) as well as the meal ingested before the experiments. The shortest transfer half-life among the subjects was about 50 minutes. During the whole-body counting, the air expired by the subjects was sampled and its radon concentration was measured using two ionization chambers. The changes in radon concentration in the expired air could be classified into three patterns. (1) It decreased with time after ingestion. (2) A peak appeared at the 15 minutes after ingestion. (3) A peak appeared at the 25 minutes after ingestion. These patterns seemed to be related to the ^<214>Bi transfer half-life and the amount of ingested water.

著者

Wrixon Anthony D.

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.39, no.2, pp.119-129, 2004-06

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The concept of exemption has been widely used in radiological protection. It is part of the regulator's arsenal for applying legislative requirements in a graded fashion, to avoid the expenditure of effort on situations where the return in terms of improvement in protection would otherwise be trivial. Nevertheless, it still remains a controversial matter. Perhaps some-what surprisingly, it is not so much the dosimetric criteria for exemption that cause debate; it is more the way in which the concept is used; the scenarios employed to calculate derived activity concentrations, and its relationship to the somewhat analogous concept of exclusion. Much of the debate regarding the use of the concept and its relationship with exclusion finds its origin in the national legislative culture that has developed over the years in various countries and the inevitable resistance to keep pace with the evolution of the system of radiological protection as recommended by the International Commission on Radiological Protection and implemented through the International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources. A particular problem has been the full integration into the legislative system of protection of exposures to radiation from sources of natural origin and the degree to which exemption is a relevant concept for dealing with such situations. The purpose of this paper is to attempt to provide some clarity on the two concepts and their practical implementation with a view to encouraging international harmonization and avoiding further unnecessary debate.