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Journal Articles

Advanced analysis technology for new material and product development

Sasaki, Hirokazu*; Nishikubo, Hideo*; Nishida, Shinsuke*; Yamazaki, Satoshi*; Nakasaki, Ryusuke*; Isomatsu, Takemi*; Minato, Ryuichiro*; Kinugawa, Kohei*; Imamura, Akihiro*; Otomo, Shinya*; et al.

Furukawa Denko Jiho, (138), p.2 - 10, 2019/02

no abstracts in English

Journal Articles

Addendum report of the JHPS expert committee on radiation protection of the lens of the eye, 2; When and how should the dosimetry of beta $$H_{rm p}$$(3) be made?

Akahane, Keiichi*; Iimoto, Takeshi*; Ichiji, Takeshi*; Iwai, Satoshi*; Oguchi, Hiroyuki*; Ono, Kazuko*; Kawaura, Chiyo*; Kurosawa, Tadahiro*; Tatsuzaki, Hideo*; Tsujimura, Norio; et al.

Hoken Butsuri, 50(4), p.257 - 261, 2015/12

In a mixed field of photon and beta radiations, the same dose assigned to skin is normally assigned to the dose to the lens of the eye as a conservative estimate of H$$_{p}$$(3). In exceptional cases that a very high beta dose might be imparted of the same order with the dose limit, however, the conservatively biased dose must be too limiting, and thereby an accurate estimate of beta $$H_{rm p}$$(3) is desirable. This article presents a practical proposal of when and how the dosimetry of beta $$H_{rm p}$$(3) should be made.

Journal Articles

Interim report of the JHPS expert committee on radiation protection of the lens of the eye, 2; The Dosimetry method for the lens of the eye of workers in Japan

Akahane, Keiichi*; Iimoto, Takeshi*; Ichiji, Takeshi*; Iwai, Satoshi*; Oguchi, Hiroyuki*; Ono, Kazuko*; Kawaura, Chiyo*; Tatsuzaki, Hideo*; Tsujimura, Norio; Hamada, Nobuyuki*; et al.

Hoken Butsuri, 49(3), p.153 - 156, 2014/09

A brief review is given of the history and methodology of external dosimetry for the lens of the eye. Under the 1989 revision to domestic radiological protection regulations, the concept on the effective dose equivalent and the dose limit to the lens of the eye (150 mSv/y) both introduced in ICRP 1977 recommendations has changed nationwide the external monitoring methodology in non-uniform exposure situations to the trunk of a radiological worker. In such situations, often created by the presence of a protective apron, the worker is required to use at least two personal dosemeters, one worn on the trunk under the apron and the other, typically, at the collar over the apron. The latter dosemeter serves the dual purpose of providing the dose profile across the trunk for improved effective dose equivalent assessment and of estimating the dose to lens of the eye. The greater or appropriate value between $$H_{rm p}$$(10) and $$H_{rm p}$$(0.07), given by the dosemeter, is generally used as a surrogate of $$H_{rm p}$$(3).

Journal Articles

Nishiyama reservoir; Lead sources, inventory, and the influence of the Nagasaki atomic bomb

Katahira, Kenshi*; Moriwaki, Hiroshi*; Ishitake, Miho*; Kokubu, Yoko; Yamazaki, Hideo*; Yoshikawa, Shusaku*

Soil and Sediment Contamination, 22(8), p.1003 - 1012, 2013/07

 Percentile:100(Environmental Sciences)

The objective of this study was to reveal historical changes in environmental pollution, including the influence of the Nagasaki atomic bomb, based on heavy metal concentrations in sediment core samples. Lead isotope ratios were used to determine the sources of Pb. A sediment core was sampled from a reservoir about 3 km east of the hypocenter of the Nagasaki atomic bomb. It was reported in a previous study that this sediment core contained high activities of $$^{239+240}$$Pu and $$^{137}$$Cs at the 1945 layer as a result of the Nagasaki atomic bomb. Concentrations of heavy metals and the Pb isotope ratios in sediments were measured using ICP-MS. The results show a spiked peak in the Pb concentrations in the same layer as that of the $$^{239+240}$$Pu and $$^{137}$$Cs. It is thought that the spiked peak is due to the loading of Pb by the Nagasaki atomic bombing, and this is supported by further results showing that the Pb isotope ratios in this layer were different from those in other layers.

Journal Articles

Distribution of rare metal in sediment and evaluation of its environmental migration and behavior in modern history

Yamazaki, Hideo*; Yoshikawa, Shusaku*; Kokubu, Yoko

Reametaru Binran, 3, p.661 - 663, 2010/12

no abstracts in English

Journal Articles

Sediments with history of environmental pollution

Kokubu, Yoko; Yamazaki, Hideo*

Isotope News, (673), p.8 - 13, 2010/05

no abstracts in English

Journal Articles

Depositional records of plutonium and $$^{137}$$Cs released from Nagasaki atomic bomb in sediment of Nishiyama reservoir at Nagasaki

Kokubu, Yoko; Yasuda, Kenichiro; Magara, Masaaki; Miyamoto, Yutaka; Sakurai, Satoshi; Usuda, Shigekazu; Yamazaki, Hideo*; Yoshikawa, Shusaku*; Nagaoka, Shinji*; Mitamura, Muneki*; et al.

Journal of Environmental Radioactivity, 99(1), p.211 - 217, 2008/01

 Times Cited Count:13 Percentile:66.09(Environmental Sciences)

In a sediment core of Nishiyama reservoir at Nagasaki, depth profiles of $$^{240}$$Pu/$$^{239}$$Pu ratio, $$^{239+240}$$Pu and $$^{137}$$Cs concentrations were determined. Sediments containing plutonium and $$^{137}$$Cs, which were fallout deposited immediately after a detonation of Nagasaki atomic bomb, were identified in the core. Observed below the sediments were macroscopic charcoals, providing evidence for initial deposit of the fallout. This is the first entire depositional records of plutonium and $$^{137}$$Cs released from the Nagasaki atomic bomb together with those from atmospheric nuclear tests.

Journal Articles

Geographical distribution of plutonium derived from the atomic bomb in the eastern area of Nagasaki

Kokubu, Yoko; Yasuda, Kenichiro; Magara, Masaaki; Miyamoto, Yutaka; Sakurai, Satoshi; Usuda, Shigekazu; Yamazaki, Hideo*; Yoshikawa, Shusaku*

Journal of Radioanalytical and Nuclear Chemistry, 273(1), p.183 - 186, 2007/07

 Times Cited Count:5 Percentile:57.11(Chemistry, Analytical)

no abstracts in English

Journal Articles

Distribution of plutonium isotopes and $$^{137}$$Cs found in the surface soils of Nagasaki, Japan

Kokubu, Yoko; Yasuda, Kenichiro; Magara, Masaaki; Miyamoto, Yutaka; Sakurai, Satoshi; Usuda, Shigekazu; Yamazaki, Hideo*; Mitamura, Muneki*; Yoshikawa, Shusaku*

Journal of Geosciences, Osaka City University, 50, p.7 - 13, 2007/03

no abstracts in English

Journal Articles

Geological distribution of plutonium isotopes of Nagasaki atomic bomb spread over Nagasaki and Kumamoto area

Kokubu, Yoko; Yasuda, Kenichiro; Magara, Masaaki; Miyamoto, Yutaka; Sakurai, Satoshi; Usuda, Shigekazu; Yamazaki, Hideo*; Yoshikawa, Shusaku*

KEK Proceedings 2006-5, p.36 - 40, 2006/11

no abstracts in English

JAEA Reports

MK-III Function Tests in JOYO; Primary main Cooling Pump

Isozaki, Kazunori; Saito, Takakazu; Sumino, Kozo; Yamazaki, Yuji*; Karube, Koji; Terano, Toshihiro; Sakaba, Hideo

JNC-TN9410 2004-014, 172 Pages, 2004/06

JNC-TN9410-2004-014.pdf:48.0MB

This technical report describes MK-III function tests on the primary main cooling pump. MK-III function tests (SKS-1) before MK-III core configuration completed from October 17, 2001 to October 23, 2001. MK-III function tests (SKS-2) after MK-III core configuration completed from January 27, 2003 to February 13, 2003. The results of function tests were shown as follows; (1) The primary main pump was confirmed to do stable control on both CAS (cascade) mode and MAN (manual) mode in the flow control system. And also this was confirmed no-emanation trend both flow and revolution per minute against flow step response, too. (2) The main motor was shifted run-back operation in about 54 seconds after scram. Run-back operation of the main motor (A) was 167m3/h with 117 rpm. 185 m$$^{3}$$/h with 118 rpm was the main motor (B). And they were controlled within the limit of run-back operational revolution 122 rpm $$pm$$ 8 rpm. The flow was confirmed to maintain in 10 percent and over of the rated flow. (3) Succeeding operation to the pony motor was confirmed to do in about 39 seconds after the primary main pump trip. The pony motor (A) operation was 180m3/h with 124rpm. 190 m$$^{3}$$/h with 123 rpm was the pony motor (B). They were enough satisfied with the forgiven revolution per minute which was 93 rpm and over. And the flow was confirmed to maintain in 10 percent and over of the rated flow. (4) Free flow coast down characteristic of the primary main pump was confirmed that time constant was 10 seconds at both the trip and run-back operation time of the primary main pump. (5) Over flow column sodium level of the main pump duty operation was NL-1,550 mm Na by column (A), NL-1,468mm Na by column (B). They were smaller than NL-1,581 mm Na by the design value. Pressure loss value of the new IHX had more conservative value than the design value. (6) The primary main pump was confirmed which the rated flow could be restored no-scram by the instantaneous power loss within 0.6 second.

JAEA Reports

None

Kasagi, Jirota*; Yamazaki, Hirohito*; Galster, W.*; Saito, Akiko*; Harada, Hideo; Furutaka, Kazuyoshi; Shcherbakov, O.

JNC-TY8400 2002-002, 64 Pages, 2002/05

JNC-TY8400-2002-002.pdf:1.81MB

no abstracts in English

Journal Articles

Performance of n-$$gamma$$ pulse-shape discrimination with simple pile-up rejection at high $$gamma$$-ray count rates

*; Yamazaki, Hirohito*; *; Kasagi, Jirota*; Harada, Hideo

Nuclear Instruments and Methods in Physics Research A, 426(2-3), p.497 - 502, 1999/05

 Times Cited Count:6 Percentile:50.79

None

Journal Articles

High-Resolution Measurement of Fine Structure in the Photoabsorption Cross Section of $$^{18}$$O

Harada, Hideo; Shigetome, Yoshialki; Ogaki, H.*; Noguchi, T.*; Yamazaki, Tetsuo*

Physical Review Letters, 80(1), p.33 - 36, 1998/01

None

JAEA Reports

None

*; Harada, Hideo*; Yamazaki, Hirohito*; Shigetome, Yoshiaki

PNC-TY8601 97-001, 0 Pages, 1997/03

PNC-TY8601-97-001.pdf:0.39MB

no abstracts in English

Journal Articles

Evaluation of Neutron Production Rate in Electron Accelerator Facility

Shigetome, Yoshiaki; Harada, Hideo; Noguchi, Tsutomu*; Yamazaki, Tetsuo*

JAERI-Conf 96-008, p.223 - 226, 1996/03

None

Journal Articles

Sensitivity study on some parameters of disruption erosion analysis

Kunugi, Tomoaki; Akiba, Masato; Ogawa, Masuro; Ise, Hideo*; Yamazaki, Seiichiro*

Fusion Technology, 21, p.1863 - 1867, 1992/05

no abstracts in English

Journal Articles

Experimental and analytical results of carbon based materials under thermal shock heat loads for fusion application

Araki, Masanori; Akiba, Masato; Seki, Masahiro; Dairaku, Masayuki; Ise, Hideo*; Yamazaki, Seiichiro*; Tanaka, Shigeru;

Fusion Engineering and Design, 19, p.101 - 109, 1992/00

 Times Cited Count:15 Percentile:19.83

no abstracts in English

Journal Articles

Development of divertor modules for Fusion Experimental Reactors

; Akiba, Masato; Araki, Masanori; Seki, Masahiro; Ise, Hideo*; *; *; *; Yamazaki, Seiichiro*

Proc. of the 2nd Japan Int. SAMPE Symp. on Advanced Materials for Future Industries,Needs and Seeds, p.1176 - 1182, 1991/00

no abstracts in English

JAEA Reports

Technical aspects of aqueous homogeneous reactor

Sugimoto, Asao; Takeda; Furuhashi, Akira; Katsuragi, Satoru; Hirota, Jitsuya; Naito, Keiji; Kondo, Yasuko; Nagasaki, Ryukichi; Yamazaki, Yasaburo; Kuroi, Hideo; et al.

JAERI 4018, 52 Pages, 1961/06

JAERI-4018.pdf:4.14MB

no abstracts in English

31 (Records 1-20 displayed on this page)