著者

小出 裕章

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.36-38, 2000 (Released:2010-02-25)

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

---

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

鹿志村 芳範 安藤 秀樹

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.30, no.1, pp.19-26, 1995 (Released:2010-02-25)

参考文献数

5

被引用文献数

1 1

著者

安東 量子

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.47, no.2, pp.78-78, 2012 (Released:2012-12-07)

著者

藤元 憲三 宮崎 振一郎 酒井 一夫

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.40, no.2, pp.147-151, 2005-06

著者

Shymal Ranjan CHAKRABORTY Abdus Sattar MOLLAH Aleya BEGUM Gias Uddin AHMAD

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.40, no.2, pp.191-201, 2005 (Released:2010-08-05)

参考文献数

21

被引用文献数

5

---

The activity concentration levels of 232Th, 238U, 40K and 137Cs in drinking water of different locations of Bangladesh were measured by using a high purity germanium (HPGe) detector. The average activity levels with one standard deviation (1σ) of 232Th, 238U and 40K were found to be 250±52mBq/L-1, 157±30mBq/L-1 and 9±3Bq/L-1, respectively. The 137Cs was detected only in 32% samples with an average 4±0.8Bq/L-1. A good correlation between the activities of 232Th and 238U was found. The radium equivalent activity (Raeq) and the representative level index (Iγr) due to natural radionuclides were also calculated. The average Raeq was found to be 1, 212±303mBq/L-1 and the average Iγr was found to be 10±3mBq/L-1. The annual individual committed effective dose (HE) due to intake of radionuclides in water was also evaluated and the average value was found to be 74±21μSv. The distribution of radionuclides was found to be normal except 137Cs. The radioactivity levels of these radionuclides were comparable to the corresponding reported values of drinking water of different countries. The results presented in this study may helpful in establishing a regulatory limit on radioactivity in drinking water in Bangladesh.

著者

木村 仁宣 本間 俊充

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.2, pp.76-87, 2006 (Released:2010-08-05)

参考文献数

38

被引用文献数

1

---

In the event of a nuclear or radiological emergency, short-term countermeasures are implemented. This report summarizes the current status of these countermeasures, such as sheltering, evacuation and iodine prophylaxis in OECD/NEA member countries.

著者

古川 雅英 床次 眞司

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.36, no.3, pp.195-206, 2001 (Released:2010-02-25)

参考文献数

39

被引用文献数

4 8

---

The absorbed dose rate in air because of terrestrial gamma radiation in Miyako-jima, an island that is part of Okinawa Prefecture in the subtropical region of Japan, was estimated at 637 points by in situ measurements with spectrometers equipped with 3″φ×3″NaI (Tl) and 1″φ×2″NaI (Tl) scintillation detectors. The mean, minimum, and maximum dose rates were calculated to be about 79nGy/h, 3nGy/h, and 165nGy/h, respectively. The correlation of the dose rate and geology showed that the high-rate areas (>100nGy/h) and the distribution of the Holocene red soils (Onokoshi Clay) overlap each other. On the other hand, the low dose rates (<30nGy/h) were mainly found in an outcrop of the Pleistocene Ryukyu Limestone, the main geologic element in the foundation of the red soils. Recent studies (e. g., Inoue et al., 1993) concluded that most of the red soils were not residuals from the base rocks, but of eolian dust “Kosa (Yellow Sand)” origin. These results strongly indicate that the dose rate in Miyako-jima has been enhanced as a result of eolian deposits transported mainly from the arid region of China since the last glacial epoch.

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

---

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

田辺 裕

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.28, no.4, pp.466-470, 1993

被引用文献数

1

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

田ノ岡 宏

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.32, no.1, pp.9-12, 1997 (Released:2010-02-25)

参考文献数

20

著者

反町 篤行 床次 眞司 Miroslaw JANIK 石川 徹夫 Sarata K. SAHOO 吉永 信治 米原 英典 酒井 一夫 山澤 弘実 秋葉 澄伯 古川 雅英 Quanfu SUN Yong-Jae KIM Supitcha CHANYOTHA Rakesh C. RAMOLA

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.45, no.1, pp.15-18, 2010 (Released:2011-02-04)

参考文献数

4

被引用文献数

1 1 1

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

---

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

---

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.

著者

Hidehito NAKAMURA Yoshiyuki SHIRAKAWA Hisashi KITAMURA Nobuhiro SATO Sentaro TAKAHASHI

出版者

一般社団法人日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.49, no.2, pp.98-101, 2014 (Released:2015-05-21)

参考文献数

25

被引用文献数

7 9

---

The enormous area of damage to Japan's Fukushima Daiichi nuclear power plant requires radiation detectors with robust base substrates to monitor high-dose-rate environmental radiation with long-term stability. Undoped aromatic ring polymers have considerable potential as base substrates in radiation detection. Here, we characterise polycarbonate (PC), which has excellent transparency, shock, radiation, and weather resistance, heat tolerance, and anti-abrasion qualities. It has a density of 1.20 g/cm3, an excitation maximum of 310 nm, and short-wavelength emission with a maximum at 350-nm. By taking into account its emission spectrum, we determined an effective refractive index of 1.64. PC has a light yield that is 0.67 times that of undoped poly (ethylene terephthalate). These results reveal that readily available PC is an effective base substrate for use in large-area radiation detectors for the nuclear power plant recovery process.

著者

南 賢太郎 福田 整司

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.1, no.1, pp.20-30, 1966-09-30 (Released:2010-02-25)

参考文献数

17

---

Contamination limits on the skin surface employed as a guide of the radiation protection for occupationally exposed individuals are derived by taking into account the external exposure dose to the skin and the internal exposure dose recieved by the inhalation, ingestion and skin penetration of the contaminants.The adequacy of the derived limits is discussed in relation to the detection probability of a hand-foot monitor for the hand contamination.The contamination limits for the skin, which have been adopted in other establishments, are also reviewed together with the general basis of the derivation.

著者

保田 浩志 賞雅 朝子 飯本 武志

出版者

一般社団法人日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.57, no.1, pp.30-35, 2022-03-31 (Released:2022-05-26)

参考文献数

3

---

In addition to the International Commission on Radiological Protection (ICRP), there are several international organizations that are engaged in activities related to radiological protection. This article briefly reviews the aims and major activities of and interrelationships between those organizations, followed by opinions about how Japanese experts should contribute to those activities.

著者

長沢 忠明 上野 陽里 河合 廣

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.16, no.3, pp.209-212, 1981 (Released:2010-02-25)

参考文献数

13

---

The transfer of tritium from a mouse injected with tritiated water to a mouse contact with the injected mouse was observed. Tritium transfered mainly through the air of small cage where both mice were haused. The kinetics of transfer to the tissues exposed to air, the skin and the lens, were similar to those to the tissues unexposed to air, the muscle and the testes. The absorbed doses of contact mice were 3-8% of injected mice for 125hr. The results showed that the contaminated individual was the source of contamination himself.