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Journal Articles

Evaluation of ambient dose equivalent rates owing to natural radioactive nuclides in eastern Japan by car-borne surveys using KURAMA-II

Ando, Masaki; Matsuda, Norihiro; Saito, Kimiaki

Nippon Genshiryoku Gakkai Wabun Rombunshi, 16(2), p.63 - 80, 2017/05

In order to discriminate the contribution of radioactive cesium due to the Fukushima Dai-ichi Nuclear Power Plant accident to the air dose rates measured by the car-borne surveys, natural background radiation was evaluated for eastern Japan area as the municipality averaged values. The window count method for distinction between natural and artificial radioactive nuclides was applied to the car-borne surveys using the KURAMA-II. Distribution of the evaluated natural background radiation showed geological feature, and it was found that the radiations measured along paved roads were reflecting the distribution of terrestrial $$gamma$$-rays. The effect of the radioactive cesium as of 2014 for the municipalities designated as the Intensive Contamination Survey Area was beyond the uncertainty of the natural background radiation. That for the other municipalities, however, was found to be almost negligible.

Journal Articles

Establishment of a clean laboratory for ultra trace analysis of nuclear materials in safeguards environmental samples

Hanzawa, Yukiko; Magara, Masaaki; Watanabe, Kazuo; Esaka, Fumitaka; Miyamoto, Yutaka; Yasuda, Kenichiro; Gunji, Katsubumi*; Sakurai, Satoshi; Takano, Seinojo*; Usuda, Shigekazu; et al.

Journal of Nuclear Science and Technology, 40(1), p.49 - 56, 2003/01

 Times Cited Count:3 Percentile:72.62(Nuclear Science & Technology)

The JAERI has established a cleanroom facility with cleanliness of ISO Class 5: the Clean Laboratory for Environmental Analysis and Research (CLEAR). It was designed to be used for the analysis of nuclear materials in environmental samples for the safeguards, the Comprehensive Nuclear-Test-Ban Treaty verification and research on environmental sciences. The CLEAR facility was designed to meet double conflicting requirements of a cleanroom and for handling of nuclear materials according to Japanese regulations, i.e., to avoid contamination from outside and to contain nuclear materials inside the facility. This facility has been intended to be used for wet chemical treatment, instrumental analysis and particle handling. A fume-hood to provide a clean work surface for handling of nuclear materials was specially designed. The performance of the cleanroom and analytical background in the laboratory are discussed. It can be concluded that the CLEAR facility enables analysis of ultra trace amounts of nuclear materials at the sub-picogram level in environmental samples.

Journal Articles

Technical preparations for atmospheric radioactivity monitoring

Miyamoto, Yutaka; Oda, Tetsuzo; Adachi, Takeo; Noguchi, Hiroshi; Nishimura, Hideo; Usuda, Shigekazu

Nukleonika, 46(4), p.123 - 126, 2001/12

no abstracts in English

JAEA Reports

None

*

JNC-TJ1400 99-002, 73 Pages, 1999/03

JNC-TJ1400-99-002.pdf:2.34MB

no abstracts in English

JAEA Reports

None

PNC-TJ1309 97-001, 112 Pages, 1997/03

PNC-TJ1309-97-001.pdf:3.5MB

no abstracts in English

Journal Articles

Environmental mercury and heavy metals in Ibaraki Prefecture,Japan

Ueno, Takashi; Amano, Hikaru

Proc. of Int. Workshop on Health and Environmental Effects of Mercury due to Mining Operations, p.178 - 189, 1997/00

no abstracts in English

JAEA Reports

None

PNC-TJ1621 96-001, 80 Pages, 1996/03

PNC-TJ1621-96-001.pdf:2.34MB

no abstracts in English

JAEA Reports

None

PNC-TJ1621 95-001, 112 Pages, 1995/03

PNC-TJ1621-95-001.pdf:7.78MB

no abstracts in English

JAEA Reports

None

PNC-TJ1600 95-004, 51 Pages, 1995/03

PNC-TJ1600-95-004.pdf:2.22MB

no abstracts in English

JAEA Reports

None

PNC-TJ1545 94-002, 139 Pages, 1994/03

PNC-TJ1545-94-002.pdf:4.33MB

no abstracts in English

JAEA Reports

Environmental radiation data, 9; Background dose rates in and around Tokyo etc. measured with portable instruments, Feb.,1991 - Mar.,1993

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

JAERI-M 93-125, 41 Pages, 1993/06

JAERI-M-93-125.pdf:1.08MB

no abstracts in English

JAEA Reports

None

PNC-TJ1615 93-002, 13 Pages, 1993/03

PNC-TJ1615-93-002.pdf:0.35MB

no abstracts in English

JAEA Reports

None

PNC-TJ1545 93-006, 224 Pages, 1993/03

PNC-TJ1545-93-006.pdf:10.3MB

no abstracts in English

JAEA Reports

None

PNC-TJ1545 91-001, , 1991/03

PNC-TJ1545-91-001.pdf:7.6MB

no abstracts in English

Journal Articles

Quantitative evaluation of multiple production of neutrons induced by cosmic rays in materials

Kimura, Takaumi

Journal of Nuclear Science and Technology, 27(12), p.1147 - 1150, 1990/12

no abstracts in English

JAEA Reports

Environmental radiation data, 7; Background dose rate in and around Tokyo measured with portable instruments

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

JAERI-M 89-155, 32 Pages, 1989/10

JAERI-M-89-155.pdf:0.87MB

no abstracts in English

JAEA Reports

Journal Articles

Measurement of $$^{2}$$$$^{2}$$$$^{2}$$Rn in air using liquid scintillation techniques

;

Radioisotopes, 30(12), p.649 - 654, 1981/00

no abstracts in English

JAEA Reports

None

*; *; *; Kitahara, Yoshihisa*; ; *; ; *

PNC-TN841 78-69VOL1, 127 Pages, 1978/12

PNC-TN841-78-69VOL1.pdf:4.48MB

no abstracts in English

27 (Records 1-20 displayed on this page)