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JAEA Reports

Application of Cherenkov light observation to reactor measurements, 2; Design and trial fabrication of Cherenkov light estimation system

Yamamoto, Keiichi; Takeuchi, Tomoaki; Hayashi, Takayasu*; Kosuge, Fumiaki*; Sano, Tadafumi*; Tsuchiya, Kunihiko

JAEA-Testing 2015-001, 25 Pages, 2015/11

JAEA-Testing-2015-001.pdf:3.52MB

Development of the reactor measurement system was started to obtain the real-time in-core nuclear and thermal information, where the quantitative measurement of brightness of Cherenkov light was investigated. This report was summarized the results of design and trial fabrication of the Cherenkov light estimation system from thermal power evaluation from Cherenkov light image emitted from the fuel elements. The developed Cherenkov light estimation system was verified with the Cherenkov light image emitted from the fuels in the core of Kyoto University Research Reactor (KUR). From the results, it is necessary to improve the observation method of Cherenkov light in the reactor and the evaluation method of the brightness of Cherenkov light. In future, the system will be applied for the evaluation of burn-up of spent fuels from the Cherenkov light emitted from the spent fuel assemblies in LWRs.

Journal Articles

Development of in-reactor observation system using Cherenkov light(VI)

Takeuchi, Tomoaki; Yamamoto, Keiichi; Otsuka, Noriaki; Shibata, Hiroshi; Shibata, Akira; Takemoto, Noriyuki; Tsuchiya, Kunihiko; Sano, Tadafumi*; Unesaki, Hironobu*; Fujihara, Yasuyuki*; et al.

KURRI Progress Report 2014, P. 108, 2015/07

Investigation of a relation between output power and brightness of Cherenkov light of a specific fuel element at KUR by a CCD camera was performed due to a development of a real-time in-core measurement technique using Cherenkov light. The results indicate that the inhomogeneous distribution of output power and the shadow of the control-rod guide tubes and the other irradiation equipment have significant effects on the brightness of the Cherenkov light. These effects could be suppressed by using a number of cameras located at various positions.

JAEA Reports

Application of Cherenkov light observation to reactor measurements, 1; Estimation of reactor power from Cherenkov light intensity

Yamamoto, Keiichi; Takeuchi, Tomoaki; Sano, Tadafumi*; Homma, Ryohei*; Kimura, Nobuaki; Otsuka, Noriaki; Kosuge, Fumiaki*; Nakajima, Ken*; Tsuchiya, Kunihiko

JAEA-Technology 2014-028, 56 Pages, 2015/01

JAEA-Technology-2014-028.pdf:9.23MB

Development of the reactor measurement system was started to obtain real-time in-core nuclear and thermal information, where the quantity measurement of brightness of Cherenkov light was applied. The system would be applied as monitoring system in severe accidents and for advanced operation management technology in existing LWRs. In this report, the calculation and the observation results were summarized about the quantity of the Cherenkov light caused by the $$gamma$$ and $$beta$$ ray emitted from the fuels in the core of Kyoto University Research Reactor.

Journal Articles

Development of in-reactor observation system using Cherenkov light, 5

Otsuka, Noriaki; Takeuchi, Tomoaki; Yamamoto, Keiichi; Shibata, Akira; Kimura, Nobuaki; Takemoto, Noriyuki; Tanimoto, Masataka; Tsuchiya, Kunihiko; Sano, Tadafumi*; Unesaki, Hironobu*; et al.

KURRI Progress Report 2013, P. 215, 2014/10

Investigation of a relation between reactor power and brightness of Cherenkov light at Kyoto University Research reactor (KUR) by a CCD camera was performed due to a development of a real-time in-core measurement technique using Cherenkov light. Analyzing the brightness value of individual RGB color component at each pixel, some of the G and B brightness values reached the maximum value of 8-bit binary number, i.e. 255, above about 2-3 MW. Therefore, we corrected the G and B brightness values by the R signals whose brightness value did not saturate even at 5 MW, the maximum reactor power of KUR. Then, the total brightness value was in proportion to the reactor power after the correction. These results indicate the reactor power can be estimated by the observation of Cherenkov light.

JAEA Reports

Horonobe Underground Research Laboratory Project; Investigation report for the 2011 fiscal year

Nakayama, Masashi; Amano, Kenji; Tokiwa, Tetsuya; Yamamoto, Yoichi; Oyama, Takuya; Amano, Yuki; Murakami, Hiroaki; Inagaki, Daisuke; Tsusaka, Kimikazu; Kondo, Keiji; et al.

JAEA-Review 2012-035, 63 Pages, 2012/09

JAEA-Review-2012-035.pdf:12.23MB

The Horonobe Underground Research Laboratory Project is planned to extend over a period 20 years. The investigations will be conducted in three phases, namely "Phase 1: Surface-based investigations", "Phase 2: Construction Phase" (investigations during construction of the underground facilities) and "Phase 3: Operation phase"(research in the underground facilities). This report summarizes the results of the investigations for the 2011 fiscal year (2011/2012). The investigations, which are composed of "Geoscientific research" and "R&D on geological disposal technology", were carried out according to "Horonobe Underground Research Laboratory Project Investigation Program for the 2011 Fiscal year". The results of these investigations, along with the results which were obtained in other departments of Japan Atomic Energy Agency (JAEA), are properly offered to the implementations and the safety regulations. For the sake of this, JAEA has proceeded with the project in collaboration with experts from domestic and overseas research organisations.

Journal Articles

Development on in-reactor observation system using cherenkov light

Tsuchiya, Kunihiko; Kitagishi, Shigeru; Nagao, Yoshiharu; Takemoto, Noriyuki; Naka, Michihiro; Kimura, Akihiro; Sano, Tadafumi*; Unesaki, Hironobu*; Yoshimoto, Takaaki*; Nakajima, Ken*; et al.

KURRI Progress Report 2009, P. 196, 2010/10

no abstracts in English

Journal Articles

Photochemical surface modification of poly(hexafluoropropylene-co-tetrafluoroethylene)(FEP) film with triethylamine

Ichinose, Yuji; *; Kawanishi, Shunichi; *; *

Chemistry Letters, 0(10), p.943 - 944, 1995/00

no abstracts in English

Journal Articles

Synergistic ion-pair extraction of lanthanide(III) with thenoyltrifluoroacetone and crown ether into 1,2-dichloroethane

Kitatsuji, Yoshihiro; Meguro, Yoshihiro; Yoshida, Zenko; *; *

Solvent Extr. Ion Exch., 13(2), p.289 - 300, 1995/00

 Times Cited Count:64 Percentile:90.86(Chemistry, Multidisciplinary)

no abstracts in English

Journal Articles

Wavelength dependence of excimer laser irradiation effects on ethylene-tetrafluoroethylene copolymer

*; Kawanishi, Shunichi; Nishii, Masanobu; Sugimoto, Shunichi*; *

Japanese Journal of Applied Physics, 33(8), p.4764 - 4768, 1994/08

 Times Cited Count:9 Percentile:50.67(Physics, Applied)

no abstracts in English

Journal Articles

Excimer laser irradiation effects on ethylene-tetrafluoroethylene copolymer

*; Kawanishi, Shunichi; Nishii, Masanobu; Shimizu, Yuichi; Sugimoto, Shunichi; *; *

J. Photopolym. Sci. Technol., 6(3), p.385 - 392, 1993/00

no abstracts in English

Journal Articles

Actinometry of an excimer laser with a ferrioxalate chemical actinometer

*; *; *; Kawanishi, Shunichi; Shimizu, Yuichi; Sugimoto, Shunichi; Suzuki, Nobutake

Reza Kenkyu, 19(3), p.247 - 253, 1991/03

no abstracts in English

Journal Articles

Effect of molecular orientation on the radiolysis of polyethylene in the presence of oxygen

*; Nishii, Masanobu; Seguchi, Tadao; *; *

Radiation Physics and Chemistry, 37(2), p.213 - 216, 1991/00

no abstracts in English

Journal Articles

Dissolution study of spent PWR fuel: Dissolution behavior and chemical properties of insoluble residues

Adachi, Takeo; ; *; ; *; Takeishi, Hideyo; Gunji, Katsubumi; Kimura, Takaumi; ; Nakahara, Yoshinori; et al.

Journal of Nuclear Materials, 174, p.60 - 71, 1990/00

 Times Cited Count:40 Percentile:94.49(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Metallic phases precipitated in UO$$_{2}$$ fuel,I; Phases in simulated fuel

Muromura, Tadasumi; Adachi, Takeo; Takeishi, Hideyo; Yoshida, Zenko; ;

Journal of Nuclear Materials, 151, p.318 - 326, 1988/00

no abstracts in English

Journal Articles

Metallic phases precipitated in UO$$_{2}$$ fuel, 2; Insoluble residue in simulated fuel

Adachi, Takeo; Muromura, Tadasumi; Takeishi, Hideyo;

Journal of Nuclear Materials, 160, p.81 - 87, 1988/00

 Times Cited Count:21 Percentile:85.65(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Journal Articles

Journal Articles

None

; ; ; ; ; ;

Shin Jikken Kagaku Koza 9, p.88 - 100, 1976/00

no abstracts in English

Journal Articles

Journal Articles

Potentiometric determination of uranium in the presence of plutonium

; ; ;

Bunseki Kagaku, 23(6), p.672 - 674, 1974/06

no abstracts in English

44 (Records 1-20 displayed on this page)