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

仲宗根 峻也 西小野 華乃子 小池 弘美 伊志嶺 聡伸 中村 夏織 西村 伊織 福田 一斗

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.55, no.1, pp.53-58, 2020

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

仲宗根 峻也

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.54, no.4, pp.231-233, 2019-12-27 (Released:2020-01-31)

著者

仲宗根 峻也 伊志嶺 聡伸 中村 夏織

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.54, no.4, pp.222-225, 2019-12-27 (Released:2020-01-31)

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

仲宗根 峻也

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.54, no.4, pp.231-233, 2019

著者

仲宗根 峻也 伊志嶺 聡伸 中村 夏織

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.54, no.4, pp.222-225, 2019

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

工藤 伸一 西出 朱美 吉本 恵子 古田 裕繁 三枝 新

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.54, no.1, pp.29-39, 2019-04-18 (Released:2019-09-03)

参考文献数

30

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In August 2018, the latest analysis of the UK National Registry for Radiation Workers (NRRW 3rd update) has been published. The NRRW studies have been published almost every ten years since the first analysis (1992). The series of NRRW aimed to analyse cancer risk from low dose occupational radiation exposure. This latest analysis is the study using third analysis data and an additional ten years of follow-up information, but did not include additionally dosimetry information. As the set of ten years lag period, only the risks of cancer were analysed, but excluding leukaemia risks owing to its lag period as two years. The same statistical methods were used in the series of NRRW study. This review provides an outline and summary of the key points of NRRW 3rd update. We denote introduction in chapter 1, summary in chapter 2, comparison with previous studies and other studies in chapter 3, discussion about results in chapter 4, meaning and limitation in chapter 5 and conclusion in chapter 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

保田 浩志

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.232-235, 2011 (Released:2012-07-28)

参考文献数

2

被引用文献数

1

著者

大学等教員協議会・ 編集委員会

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.53, no.3, pp.195-196, 2018 (Released:2018-11-27)

著者

仲宗根 峻也 城間 吉貴

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.3, pp.185-188, 2018

著者

工藤 ひろみ 床次 眞司 細田 正洋 岩岡 和輝 葛西 幸彦

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.51, no.2, pp.92-97, 2016

被引用文献数

2

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On 11 March 2011, a 9.0 magnitude earthquake, which occurred at Northern Japan, and subsequent tsunami caused serious damage to the Fukushima Daiichi Nuclear Power Station (FDNPS). People living within a radius of 30 km were evacuated from their homes. Residents of Namie Town stayed for several days at a location 30 km northwest of the FDNPS. However, as a highly concentrated radioactive plume passed over this location, the evacuees are very much worried about their radiation exposure. On the other hand, there are several nuclear facilities in Aomori Prefecture. Such circumstances may produce concerns among people regarding an increased risk of cancer or other radiation-induced disease. In this study, focusing on the citizens of Namie Town and Aomori Prefecture (Hirosaki, Aomori and Hachinohe Cities), their understanding of basic knowledge on radiation was investigated through anonymous questionnaires. The present study has revealed that people recognized that they are exposed to natural radiation of more than 1 mSv, Despite this fact, however, people in Namie Town believe even radiation of 1 mSv will cause them some biological effects. Although basic general knowledge on radiation should be provided, a reliable relationship between the general public and experts also needs to be established.

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

高畠 賢 砂押 正章 川口 勇生

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.1, pp.70-74, 2016 (Released:2016-07-06)

参考文献数

11

被引用文献数

1

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

仲宗根 峻也 石津 裕二 池本 憲弘 城間 吉貴 赤田 尚史 田中 将裕 古川 雅英

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.65-71, 2018

被引用文献数

1

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In this study, to estimate the recent tritium concentration and its variation with latitude and time in Japan, environmental water samples were taken monthly from June 2014 to October 2016 in Okinawa Island, subtropical region of Japan. The inland water samples were taken from two springs and the drop water samples were taken in a limestone cave. The samples were distilled to remove impurities and then electrolysed using electrolytic enrichment system. Each of the enrichment samples was mixed with the liquid scintillation cocktail, and the tritium concentration was measured with a low background liquid scintillation counter. Arithmetic mean ± standard deviation for the tritium concentration of Morinokawa (spring water), Kakinohanahikawa (spring water) and Gyokusendo (cave drop water) samples were estimated to be 0.13 ± 0.04 Bq L^-1, 0.12 ± 0.03 Bq L^-1 and 0.13 ± 0.03 Bq L^-1, respectively. The comparison between these results and reported data suggested that the latitude effect is one of factors in the relatively low tritium concentration observed in Okinawa Island.