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Journal Articles

Distribution map of natural gamma-ray dose rates for studies of the additional exposure dose after the Fukushima Dai-ichi Nuclear Power Station accident

Sanada, Yukihisa; Yoshimura, Kazuya; Urabe, Yoshimi*; Iwai, Takeyuki*; Katengeza, E. W.*

Journal of Environmental Radioactivity, 223-224, p.106397_1 - 106397_9, 2020/11

Journal Articles

Japanese population dose from natural radiation

Omori, Yasutaka*; Hosoda, Masahiro*; Takahashi, Fumiaki; Sanada, Tetsuya*; Hirao, Shigekazu*; Ono, Koji*; Furukawa, Masahide*

Journal of Radiological Protection, 40(3), p.R99 - R140, 2020/09

 Times Cited Count:2 Percentile:16.34(Environmental Sciences)

UNSCEAR and the Nuclear Safety Research Association report the annual effective doses from cosmic rays, terrestrial radiation, inhalation and ingestion from natural sources. In this study, radiation doses from natural radiation sources in Japan were reviewed with the latest knowledge and data. Total annual effective dose from cosmic-ray exposure can be evaluated as 0.29 mSv. The annual effective dose from external exposure to terrestrial radiation for Japanese population can be evaluated as 0.33 mSv using the data of nationwide survey by the National Institute of Radiological Sciences. The Japan Chemical Analysis Center (JCAC) performed the nationwide radon survey using a unified method for radon measurements in indoor, outdoor and workplace. The annual effective dose for radon inhalation was estimated using a current dose conversion factor, and the values were estimated to be 0.50 mSv. The annual effective dose from thoron was reported as 0.09 mSv by UNSCEAR and then the annual effective dose from inhalation can be described as 0.59 mSv. According to the report of large scale survey of foodstuff by JCAC, the effective dose from main radionuclides due to dietary intake can be evaluated to be 0.99 mSv. Finally, Japanese population dose from natural radiation can be assessed as 2.2 mSv which is near to the world average value of 2.4 mSv.

JAEA Reports

None

*; *

JNC-TJ1400 2000-008, 82 Pages, 2000/03

JNC-TJ1400-2000-008.pdf:3.05MB

no abstracts in English

Journal Articles

Simplified technique for measurement and evaluation of indoor cosmic ray dose rate using a 3 dia. spherical NaI(Tl) scintillation detector

Nagaoka, Toshi; Moriuchi, Shigeru; Sakamoto, Ryuichi; Saito, Kimiaki; Tsutsumi, Masahiro

Hoken Butsuri, 30, p.9 - 14, 1995/00

no abstracts in English

Journal Articles

Risks associated with utilization of radiation, II; Uses of radiation and radiation exposures

Nippon Genshiryoku Gakkai-Shi, 35(7), p.596 - 599, 1993/07

no abstracts in English

JAEA Reports

None

*; *; *; Iida, Takao*; *; *

PNC-TJ1545 93-005, 36 Pages, 1993/03

PNC-TJ1545-93-005.pdf:1.09MB

no abstracts in English

JAEA Reports

None

PNC-TJ1545 92-003, 187 Pages, 1992/03

PNC-TJ1545-92-003.pdf:6.97MB

no abstracts in English

Journal Articles

Radiation exposure in the everyday life

Hoshasen To Sangyo, (12), p.19 - 23, 1979/00

no abstracts in English

Journal Articles

Dose limits and basis of ICRP recommendations

Rodo Eisei, 17(7), p.19 - 24, 1976/07

no abstracts in English

Oral presentation

Study of an estimation method of natural radiation by aerial radiation monitoring

Nishizawa, Yukiyasu; Ishida, Mutsushi; Sanada, Yukihisa; Torii, Tatsuo

no journal, , 

no abstracts in English

Oral presentation

Study of an estimation method of natural radiation by aerial radiation monitoring

Nishizawa, Yukiyasu; Sugita, Takeshi*; Sanada, Yukihisa; Torii, Tatsuo

no journal, , 

no abstracts in English

Oral presentation

Committee on dose assessments of Japanese population

Takahashi, Fumiaki; Ishimori, Yuu; Inagaki, Masayo*; Omori, Yasutaka*; Sanada, Tetsuya*; Sugino, Masato*; Furukawa, Masahide*; Hosoda, Masahiro*; Manabe, Kentaro; Yajima, Kazuaki*; et al.

no journal, , 

The Japan Health Physics Society (JHPS) established a committee on dose assessments of Japanese population in August, 2015. The committee consists of 12 members (researchers and technicians) who are engaged in natural radiation measurements, radiation monitoring, radiation dose assessment and so on. Discussion have been made on dose assessments for daily life exposure in Japan. At the first meeting, stragedy of the committee was discussed and terrestrial radiation, cosmic radiation. Radon and radioactivity in food were defined as the radiological source to be investigated. It was also decided that the committee also would investigate influential factors (e.g., dose assessment model, daily life pattern) on radiation dose assessments. In addition, the committee has a plan to make discussions how JHPS should undertake this issue in future. At the 49th Annual meeting of JHPS, the committee members report their activities and make discussions on radiation dose assessment of Japanese population with the participants to the meeting.

Oral presentation

Review and discussions on radiation doses in Japanese populations

Takahashi, Fumiaki

no journal, , 

The Japan Health Physics Society (JHPS) proposes international session under collaboration with scientific societies of this field in Asian countries at the annual meeting. The topics in this year is radiation dose assessment for internal and external exposures from natural and medical radiation sources. Whereas the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCER) has reported exposure of the public from various sources, the contribution of each radiation source to the annual dose can differ among countries due to life pattern. Radiation dose to ingestion becomes higher in Japan, because consume of seafood in which nuclide of uranium series can be accumulated is large. On the contrary, radiation dose from inhalation of Rn gas is lower in Japan due to residential structures. Although m medical exposure dose is assumed to be higher than average over the world in Japan, the dose were derived based upon data before 2000. In this session, the author will report the radiation dose in Japanese populations and issues to be discussed for dose assessments in more detail.

Oral presentation

Radiation dose assessment from natural radiation; On the basis of recent data

Takahashi, Fumiaki

no journal, , 

The Japan Health Physics Society holds the 50th Annual Meeting by collaboration with Japanese Society of Radiation Safety Management. Educational Session is set for young researchers at the meeting. Public dose from natural radiation in Japan is one of the session topics. The radiation dose from natural background is announced to public following the accident at TEPCO Fukushima Dai-ichi NPP accident. Principal radiation sources are terrestrial radiation, cosmic radiation, radon and radioactivity in food. The levels of radiation dose and radioactivity are continuously investigated in Japan. As a conversion coefficient is applied to estimate effective dose from the radiation dose or radioactivity, the revise of conversion coefficient affects the result of public dose. In addition, a life-style is an influential factor on the radiation dose to public, too. Thus, the basic radiation dose and method to estimate radiation dose should be comprehended, if an expert explains the public dose.

Oral presentation

Radiation dose estimation at the high background radiation area in Indonesia; Dose rate measurement at different height

Sasaki, Michiya*; Yamada, Ryohei; Nugraha, E.*; Akata, Naofumi*; Tokonami, Shinji*; Hosoda, Masahiro*; Iwaoka, Kazuki*; Pornnumpa, C.*; Kudo, Hiromi*; Sahoo, K.*; et al.

no journal, , 

The area around Mamuju city in West Sulawesi, Indonesia has high possibility of being a target of epidemiological research as a high natural radiation area. We would like to report the difference in radiation dose at different heights from the ground measured by the D-Shuttle.

15 (Records 1-15 displayed on this page)
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