著者

浅野 孝 小林 保 樋熊 孝信

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.8, no.1, pp.33-37, 1973

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Half-face masks have been used routinely at plutonium facilities in the Power Reactor and Nuclear Fuel Development Corporation. In 1970, a mask man-test began to evaluate the protection efficiencies of masks when wearing and to instruct workers how to wear them properly. DOP was used as a test aerosol, and 232 persons were tested. In the first test 70% of the persons could wear the masks with a good fit (leak rate less than 1%). The persons with leak rate over 1% were repeatedly tested to investigate causes of the leak.<br>The persons were classified into three groups; the first one having experience of wearing masks, the second one having no experience and the third one being given some instructions about masks before the test. The persons in the first group weared the masks better than those in the second group, but the test suggest the instruction is the most effective.<br>The methods procedures and results of the tests are described.

著者

山本 政儀

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.24, no.3, pp.249-257, 1989 (Released:2010-02-25)

参考文献数

11

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The accident at the Chernobyl reactor site starting at 26th April 1986 caused a widespread distribution of radionuclides. In all countries radiation measurements and analyses of samples have been made to show the features to consider in a dosimetric evalution, but transuranium elements have been less investigated.In Europe, the determination of several transuranium elements, such as neptunium (Np-239), plutonium (Pu-238, 239, 240, 241), americium (Am-241) and curium (Cm-242) was possible. The total depositions (mBq/m2) at Monaca, Rise (Denmark) and Neuherberg (Munich) were estimated to be 10, 20 and 51, respectively. These levels are only 0.01-0.05% of the previous deposition from nuclear weapons tests. The activity ratios Pu-238/Pu-239, 240 (0.4-0.5) and Pu-241/Pu-239, 240 (80-90) from Chernobyl fallout were much higher than those from nuclear weapons tests. Here, a more detailed feature of transuranium elements released into environment from the Chernobyl reactor is presented comparing with that from nuclear weapons fallout, including the measurements of transuranium elements of the Chernobyl debris in Japan.

著者

角川 正義 井上 義教

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.2, no.2, pp.81-94, 1967-06-30 (Released:2010-02-25)

参考文献数

76

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The causes of fires of plutonium and uranium in the nuclear facilities are summalized through the literature survey of accidents in the United States and the United Kingdom, and of metallurgical studies. It is noticeable that spontaneous ignition is due to the operations such as of degreasing, leaching, cutting and scraping, to the treatment with nitric acid, or to the existence of moisture, for example, after low-temperature experiment of the metals.The methods of fire-prevention and fire-fighting at the plutonium fires are also described with the recommendation on the view point of health physics: Aluminum icontaner is likely to have excellent property for the fire prevention. The data of particle size distribution and deposition velocity of plutonium emitted at the fire are also showed. Finally, the efficient agent and technique of fire extinguishing are described with some data from experiences in the accidents and the laboratory experiments.

著者

Ching-Chung HUANG Pei-Huo LIN Yu-Ming LIN Pao-Shan WENG

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.21, no.4, pp.265-271, 1986 (Released:2010-02-25)

参考文献数

18

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This paper deals with the X-radiation from television receivers and video display terminals. The bremsstrahlung production rate was calculated according to the thick target theory, and the transmitted X-radiation was measured by the spectrometry method. The calculated and the measured results were compared and discussed. In addition, evidences were shown that only the highest energy component of the bremsstrahlung can penetrate the cathode ray tube.

著者

天野 良平

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.30, no.2, pp.113-116, 1995 (Released:2010-02-25)

著者

相本 篤子

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.32, no.2, pp.139-143, 1997 (Released:2010-02-25)

参考文献数

10

著者

山田 裕司 宮本 勝宏 森 貞次 小泉 彰

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.17, no.4, pp.461-467, 1982 (Released:2010-02-25)

参考文献数

11

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Collection performance of a HEPA filter and a new type filter which was recently developed for removing fine particles below 0.3μm was verified by using a laser aerosol particle counter in the particle size range from 0.12 to 0.42μm diameter in which the filter performance was not sufficiently clarified. Tested filter sheets were 14.5cm by 14.5cm in dimensions.DOP particles ranging from 0.12 to 0.17μm exhibited higher penetration of HEPA filter than DOP particles from 0.27 to 0.42μm by a factor of 20 at the standard face velocity of 2.4cm/sec. The penetration of HEPA filter was 6.6×10-4 for 0.12 to 0.17μm DOP particles, and that of the new type filter was 3.1×10-6.It was confirmed that overall system penetration of two HEPA filters in series could be described as the product of each stage penetration.

著者

板倉 延江 加藤 朗 占部 逸正 辻本 忠

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.13, no.2, pp.113-116, 1978 (Released:2010-02-25)

参考文献数

6

著者

矢部 明

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.7, no.3, pp.163-172, 1972 (Released:2010-02-25)

参考文献数

35

著者

小泉 彰 福田 俊

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.33, no.3, pp.286-293, 1998 (Released:2010-02-25)

参考文献数

9

著者

松田 秀晴 深谷 光春 湊 進

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.25, no.4, pp.385-390, 1990 (Released:2010-02-25)

参考文献数

9

被引用文献数

2 5

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Natural gamma-ray and cosmic-ray exposure rates were measured indoors and outdoors for 94 model houses of four housing centers in Nagoya to obtain basic data for estimation of the population dose. Influence of the structure of houses on indoor exposure rates and relationship between indoor and outdoor natural gamma-ray exposure rates were studied. Exposure rates were measured with a 1.5″φ×4″ NaI (Tl) scintillation counter and a 6″φ spherical plastic scintillation counter.The mean indoor natural gamma-ray exposure rate in ferro-concrete buildings was about 40% higher than that in fireproof wooden houses, about 60% higher than that in light-weight steel-framed buildings, in fireproof wooden houses, it was also about 10% higher than in light-weight steel-framed building.The ratio of indoor to outdoor natural gamma-ray exposure rate was found to be about 0.95±0.15, 0.77±0.10, and 0.72±0.13 for ferro-concrete buildings, fireproof wooden houses and light-weight steel-framed buildings, respectively.The mean indoor cosmic-ray exposure rate in ferro-concrete buildings was 2.8μR/h, about 18% lower than the outdoors. The indoor cosmic-ray exposure rate in fireproof wooden houses and light-weight steel-framed buildings were 3.2μR/h, about 6% lower than the outdoors.

著者

中川 晴夫 神田 啓治

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.35, no.1, pp.41-51, 2000 (Released:2010-02-25)

参考文献数

11

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The Health Control Policy of Japan was established in 1965 by the Atomic Energy Commission and has not been revised since then. However, in 1972, a law concerning the health of elderly persons was enacted, and the recommendations of the International Commission for Radiological Protection (ICRP), which presents the basic standards regarding radiation protection, were published. Both of these events had a very strong impact on the drafting of health control policy, as the Japanese Government was compelled to introduce a new policy aimed at reducing the risk of cancer, the greatest physical probability risk facing radiation workers. Laws governing the physical examinations of radiation workers working in nuclear power stations in Japan are divided into three groups: 1) Laws for Safety and Sanitary Conditions of Workers; 2) Laws for Health Insurance Cooperatives; and 3) Law for the Health of the Elderly. As controlling the data of these examinations is more complicated than that of the physical examinations of A-bomb survivors, a centralized registration system is needed. This paper proposes the need for such a registration system to be granted under the three laws governing special accounts for power supply municipalities and suggests setting up the system within regional medical information systems. It also proposes the founding of an overall health insurance cooperative, to be managed by the Contractors Safety Union in each municipality.

著者

Nobuhito ISHIGURE

出版者

Japan Health Physics Society

雑誌

Japanese Journal of Health Physics (ISSN:03676110)

巻号頁・発行日

vol.34, no.2, pp.139-141, 1999 (Released:2010-02-25)

参考文献数

6

著者

Y. XIA J. Qu S. L. LIU

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.37, no.4, pp.353-356, 2002 (Released:2010-08-05)

参考文献数

10

著者

馬淵 清彦

出版者

Japan Health Physics Society

雑誌

保健物理 : hoken buturi (ISSN:03676110)

巻号頁・発行日

vol.32, no.1, pp.5-8, 1997-03-31

著者

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

出版者

Japan Health Physics Society

雑誌

保健物理 : hoken buturi (ISSN:03676110)

巻号頁・発行日

vol.45, no.1, pp.15-18, 2010-03-01

被引用文献数

1 1

著者

大橋 靖雄

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.20, no.4, pp.357-369, 1985

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In this paper, the possibility of the biological monitoring by <i>Tradescantia</i> for radiation effluents from a power reactor site is considered. Data for analysis were obtained through the experimental study which had been conducted by Expert Committee on Biological Effects of Environmental Radiation and carried out from 1979 to 1981 near to Takahama Nuclear Power Plant in Fukui Prefecture. Measurements had been taken on the mutation frequency in <i>Tradescantia</i> stamen hairs and environmental factors including evaluated radioactive airborne effluents, natural airborne radioactivity, weather conditions and air pollution indices. This paper is coupled with Yamaguchi <i>et al.</i> (1985); while the latter tackles the problem, mainly by comparing the observed (calculated) concentration levels of radioactive effluents with biological thresholds, this paper presents the results of statistical data analysis which revealed the following: (1) There is highly significant negative correlation between temperature before blooming and mutation frequency. (2) After adjusting the effect of temperature, there is no significant association between radioactive effluents and mutation frequency.

著者

芦澤 潔人 西川 智子 横山 直方 長瀧 重信 山下 俊一 伊東 正博 原 健 難波 裕幸 星 正治 柴田 義貞 重松 逸造 紀伊國 献三

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.151-154, 1996-06

著者

甲斐 倫明 甲斐 倫明

出版者

Japan Health Physics Society

雑誌

保健物理 : hoken buturi (ISSN:03676110)

巻号頁・発行日

vol.35, no.4, pp.421-433, 2000-12-01

被引用文献数

2

著者

恵 和子 岩崎 幸治 虎谷 博一 松並 忠男

出版者

Japan Health Physics Society

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.18, no.3, pp.225-229, 1983

被引用文献数

2