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JAEA Reports

Test using ROV and lifter for recovery waste of HASWS wet waste

Sano, Kyohei; Tameta, Yuito; Akuzawa, Tadashi; Kato, Soma; Takano, Yugo*; Akiyama, Kazuki

JAEA-Technology 2024-018, 68 Pages, 2025/02

JAEA-Technology-2024-018.pdf:4.73MB

High Active Solid Waste Storage Facility (HASWS) at the Tokai Reprocessing Plant (TRP) is a facility for storing highly radioactive solid waste generated from the reprocessing operation. Wet cells in HASWS store hull cans that contain fuel cladding tubes (hull) and fuel end pieces remained after the spent nuclear fuel shearing and dissolving, as well as used filters and contaminated equipment. Dry cells in HASWS store analytical waste containers that contain waste jugs and the other waste generated from analytical operation of samples in TRP. Since HASWS does not have waste recovery equipment from the cells, it is considered that recovery equipment to be installed. In the wet cells, methods of recovery wet-stored waste are being considered that utilize a ROV, which has been used in decommissioning in the UK, and a lifter, which is used in the marine industry to float and transport items sinking to the bottom of the sea. To confirm the feasibility of the recovery method that combines the functions of the ROV and the lifter, tests for removing waste were conducted in steps that came closer to the real environment: a "unit test" to confirm the functions required of each of the ROV and the lifter, a "combination test" to combine the ROV and the lifter to move waste underwater, and a "comprehensive test" to retrieve waste in an environment simulating the hull storage facility. Through this test, the ROV and the lifter were able to perform a series of tasks required to recovery waste - cutting the wires attached to the waste, attaching a lifter to the waste, moving the waste to under the opening, and attaching the recovery device to the moved waste - in series, confirming the feasibility of the method for recovery wet-stored waste using the ROV and the lifter.

Journal Articles

Design of MA(III)/Ln(III) separation process of extraction chromatography technology

Akuzawa, Tadashi*; Kim, S.-Y.*; Kubota, Masahiko*; Wu, H.*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki; Arai, Tsuyoshi*

Journal of Radioanalytical and Nuclear Chemistry, 331(12), p.5851 - 5858, 2022/12

 Times Cited Count:5 Percentile:60.29(Chemistry, Analytical)

Journal Articles

Spectroscopic study of the $$Lambda$$(1405) resonance via the $$d(K^-, n)$$ reaction at J-PARC

Asano, Hidemitsu*; Hashimoto, Tadashi; Tanida, Kiyoshi; 72 of others*

AIP Conference Proceedings 2130, p.040018_1 - 040018_6, 2019/07

 Times Cited Count:3 Percentile:79.08(Physics, Nuclear)

JAEA Reports

Study on the applicability of the fiber-optic crack detection sensor as a safety technology (Joint research)

Hiraiwa, Kenichi*; Hirai, Kazuhide*; Sano, Tadashi*; Osawa, Hideaki; Sato, Toshinori; Aoyagi, Yoshiaki; Fujita, Tomoo; Aoyagi, Kazuhei; Inagaki, Daisuke*

JAEA-Technology 2015-033, 50 Pages, 2015/11

JAEA-Technology-2015-033.pdf:12.6MB

Japan Atomic Energy Agency (hereinafter referred to as JAEA) has been conducted a geoscientific research and development project at the Mizunami Underground Research Laboratory and the Horonobe Underground Research Laboratory in order to construct scientific and technological basis for geological disposal. As a collaborative research between JAEA and Tokyo Sokki Kenkyujo Co., Ltd. (hereinafter referred to as TML), we focused on the fiber-optic crack detection sensor developed by TML as a method to detect cracks in the support system that may affect the stability of rock cavern during the operation. To verify long-term safety performance of the sensor for decades, "Evaluation test of long-term durability of fiber-optic crack detection sensor and the support system" at the Mizunami Underground Research Laboratory and "Performance evaluation test of fiber-optic crack detection sensor for in-situ crack detection" at the Horonobe Underground Laboratory Research Laboratory were conducted. As the result, we understand that fiber-optic crack detection sensor is applicable measurement method to promptly detect the cracks in the support system.

JAEA Reports

The Outline of investigation on integrity of JMTR concrete structures, cooling system and utility facilities

Ebisawa, Hiroyuki; Hanakawa, Hiroki; Asano, Norikazu; Kusunoki, Hidehiko; Yanai, Tomohiro; Sato, Shinichi; Miyauchi, Masaru; Oto, Tsutomu; Kimura, Tadashi; Kawamata, Takanori; et al.

JAEA-Technology 2009-030, 165 Pages, 2009/07

JAEA-Technology-2009-030.pdf:69.18MB

The condition of facilities and machinery used continuously were investigated before the renewal work of JMTR on FY 2007. The subjects of investigation were reactor building, primary cooling system tanks, secondary cooling system piping and tower, emergency generator and so on. As the result, it was confirmed that some facilities and machinery were necessary to repair and others were used continuously for long term by maintaining on the long-term maintenance plan. JMTR is planed to renew by the result of this investigation.

Journal Articles

Development and applications of soft X-ray multilayer gratings in the keV region

Koike, Masato; Imazono, Takashi; Kawazoe, Tadashi*; Otsu, Motoichi*; Sano, Kazuo*

Denki Gakkai Hikari, Ryoshi Debaisu Kenkyukai Shiryo OQD-08-34, p.15 - 18, 2008/05

A Mo/SiO$$_{2}$$ multilayer laminar-type holographic grating having an average groove density of 2400 lines/mm is designed and fabricated for use with a soft X-ray flat field spectrograph. A varied-line-spaced grooves pattern is generated by the use of an aspheric wavefront recording system and laminar-type grooves are formed by a reactive ion-etching method. The measured first-order diffraction efficiency is 18$$sim$$20%. The flat field spectrograph equipped with the grating indicates a spectral line width of 8$$sim$$14 eV for the emission spectra generated from electron-impact X-ray sources. A Mo/SiO$$_{2}$$ multilayer grating having a groove density of 7600 lines/mm fabricated by use of a new lithography machine based on optical near field technologies showed first-order diffraction efficiency of $$sim$$3%. It is over one order magnitude higher than that of the other orders.

Journal Articles

The H-Invitational Database (H-InvDB); A Comprehensive annotation resource for human genes and transcripts

Yamasaki, Chisato*; Murakami, Katsuhiko*; Fujii, Yasuyuki*; Sato, Yoshiharu*; Harada, Erimi*; Takeda, Junichi*; Taniya, Takayuki*; Sakate, Ryuichi*; Kikugawa, Shingo*; Shimada, Makoto*; et al.

Nucleic Acids Research, 36(Database), p.D793 - D799, 2008/01

 Times Cited Count:52 Percentile:70.47(Biochemistry & Molecular Biology)

Here we report the new features and improvements in our latest release of the H-Invitational Database, a comprehensive annotation resource for human genes and transcripts. H-InvDB, originally developed as an integrated database of the human transcriptome based on extensive annotation of large sets of fulllength cDNA (FLcDNA) clones, now provides annotation for 120 558 human mRNAs extracted from the International Nucleotide Sequence Databases (INSD), in addition to 54 978 human FLcDNAs, in the latest release H-InvDB. We mapped those human transcripts onto the human genome sequences (NCBI build 36.1) and determined 34 699 human gene clusters, which could define 34 057 protein-coding and 642 non-protein-coding loci; 858 transcribed loci overlapped with predicted pseudogenes.

Journal Articles

Vulnerability of feline T-lymphocytes to charged particles

Kakizaki, Takehiko; Hamada, Nobuyuki*; Sakashita, Tetsuya; Wada, Seiichi*; Hara, Takamitsu*; Funayama, Tomoo; Hodatsu, Tsutomu*; Natsuhori, Masahiro*; Sano, Tadashi*; Kobayashi, Yasuhiko; et al.

Journal of Veterinary Medical Science, 69(6), p.605 - 609, 2007/06

 Times Cited Count:1 Percentile:13.42(Veterinary Sciences)

no abstracts in English

Journal Articles

The Characteristics of radiation-induced cell responses in the canine spontaneous tumor cells

Sano, Tadashi*; Wada, Seiichi*; Suzuki, Keiko*; Natsuhori, Masahiro*; Kakizaki, Takehiko; Ito, Takashi*; Nakazawa, Konomi*; Kobayashi, Yasuhiko; Ito, Nobuhiko*

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 115, 2007/02

Journal Articles

Killing of feline T-lymphocytes by $$gamma$$-rays and energetic carbon ions

Kakizaki, Takehiko; Hamada, Nobuyuki*; Funayama, Tomoo; Sakashita, Tetsuya; Wada, Seiichi*; Hodatsu, Tsutomu*; Natsuhori, Masahiro*; Sano, Tadashi*; Kobayashi, Yasuhiko; Ito, Nobuhiko*

Journal of Veterinary Medical Science, 68(12), p.1269 - 1273, 2006/12

 Times Cited Count:3 Percentile:22.89(Veterinary Sciences)

no abstracts in English

Journal Articles

Distinct modes of cell death by ionizing radiation observed in two lines of feline T-lymphocytes

Kakizaki, Takehiko; Hamada, Nobuyuki*; Wada, Seiichi*; Funayama, Tomoo; Sakashita, Tetsuya; Hodatsu, Tsutomu*; Sano, Tadashi*; Natsuhori, Masahiro*; Kobayashi, Yasuhiko; Ito, Nobuhiko*

Journal of Radiation Research, 47(3-4), p.237 - 243, 2006/11

no abstracts in English

JAEA Reports

Experimental investigation of activities and tolerance of sulphate-reducting bacteria under alkaline and reducing condition

Mano, Tadashi; Yoshikawa, Hideki; Fukunaga, Sakae*; Yui, Mikazu; Yamagata, Junji*; Asano, Hidekazu*; Yamanaka, Yumiko*

PNC TN8410 94-117, 60 Pages, 1993/03

None

Oral presentation

Study of recovery waste from High Active Solid Waste Storage (HASWS) at Tokai Reprocessing Plant, 6; Comprehensive test using ROV and lifter

Sano, Kyohei; Tameta, Yuito; Akuzawa, Tadashi; Akiyama, Kazuki

no journal, , 

JAEA are considering using a ROV and lifters to recovery waste stored in the HASWS wet cell at the TRP. To confirm the feasibility of the recovery method using a ROV, we conducted tests in an environment simulating the storage state. The test results confirmed that tasks required for the waste recovery method using a ROV can be performed for waste in simulating the real environment. In addition, we confirmed that in a dark environment, it is difficult to grasp the position of the cables from the camera inside the cell, so it is necessary to improve the working environment, such as installing a new light source at the penetration.

Oral presentation

Study of recovery waste from High Active Solid Waste Storage (HASWS) at Tokai Reprocessing Plant, 5; Combination test of underwater ROV and underwater lifter (grab type)

Akuzawa, Tadashi; Tameta, Yuito; Sano, Kyohei; Akiyama, Kazuki

no journal, , 

In preparation for the decommissioning of the HASWS, we are considering using an underwater ROV and a submersible lifter (grab type) to remove hull cans, stainless steel filters and stirrers. In this case, to confirm the feasibility of this method, we placed simulated filters and contaminated equipment in various positions in a mock-up facility simulating a wet cell and conducted a test to move them using an underwater ROV and a submersible lifter (grab type). As a result of the test, we confirmed that in all positions, the filters and contaminated equipment could be grasped and floated by the underwater lifter (grab type) and then moved by the underwater ROV.

Oral presentation

Modes of cell death of feline T lymphocytes by ionizing radiation

Funayama, Tomoo; Kakizaki, Takehiko; Wada, Seiichi; Hamada, Nobuyuki*; Sakashita, Tetsuya; Hodatsu, Tsutomu*; Yamada, Naoaki*; Sano, Tadashi*; Natsuhori, Masahiro*; Kobayashi, Yasuhiko; et al.

no journal, , 

Responses of two lines of feline T lymphocytes, FeT-J and FL-4, to ionizing radiation were examined in the present study. FL-4 cells, but not FeT-J, were persistently infected with feline immunodeficiency virus. Cells were irradiated with $$^{60}$$Co-$$gamma$$ rays at 2 Gy/min. Surviving fractions were evaluated with clonogenic assay. Apoptosis was detected using TdT-mediated dUTP-biotin nick end labeling (TUNEL) method. Changes in nuclear morphology of viable cells were evaluated by double staining with Hoechst 33342 and ethidium bromide. Mean surviving fractions of FL-4 cells were slightly higher than FeT-J for each radiation dose given. However, dose required to reduce to 63 % of surviving fraction was 1.9 Gy in both cell lines. TUNEL assay, however, revealed the maximum frequency of apoptosis in FL-4 cells ($$<$$20 %) was lower than in FeT-J cells ($$>$$40 %). The time of frequency peak of TUNEL-positive cells in FL-4 was shorter than that of FeT-J. FL-4 cells reached peak level within 24 hours after irradiation, but FeT-J cells needed later than 48 hours after irradiation. Exposure of FL-4 cells to $$gamma$$ rays resulted in the giant- and the multi- nucleus formation. Nuclear swelling occurred to less extent in FeT-J than FL-4 cells. In conclusion, we found the difference in cellular responses to radiation in two lines of feline T lymphocytes. Modes of cell death of FL-4 cells were non-apoptotic and more research would discover new mechanism associated with apoptosis.

Oral presentation

Basic research programs of vitrification technology for waste volume reduction, 91; Improved TEHDGA column flow for MA + Ln co-recovery

Ishizawa, Kenta*; Akuzawa, Tadashi*; Kida, Fukuka*; Arai, Tsuyoshi*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki

no journal, , 

no abstracts in English

Oral presentation

Basic research programs of vitrification technology for waste volume reduction, 92; Development of HONTA column flow for MA/Ln separation

Masumura, Keisuke*; Akuzawa, Tadashi*; Kida, Fukuka*; Arai, Tsuyoshi*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki

no journal, , 

no abstracts in English

Oral presentation

Practical research using the spontaneous neoplasm case of the dog as a particle irradiation treatment model

Sano, Tadashi*; Suzuki, Keiko*; Natsuhori, Masahiro*; Kakizaki, Takehiko; Ito, Nao*; Nakazawa, Konomi*; Ito, Nobuhiko*; Wada, Seiichi*; Kobayashi, Yasuhiko

no journal, , 

no abstracts in English

Oral presentation

Study of recovery waste from High Active Solid Waste Storage (HASWS) at Tokai Reprocessing Plant, 4; Combination test of ROV and lifter (grab type) (Hull can)

Tameta, Yuito; Sano, Kyohei; Akuzawa, Tadashi; Akiyama, Kazuki

no journal, , 

For the decommissioning of HASWS at TRP, we are considering using a ROV and a lifter to retrieve waste stored in the wet cell. We are considering using a lifter (grab type) to retrieve hull cans that are difficult to move with the ROV and the lifter (hook type), and conducted a mock-up test to confirm the feasibility of moving hull cans by the ROV and the lifter (grab type). Through the test, we confirmed that the hull cans placed in various positions in the mock-up facility could be moved by the ROV and the lifter (grab type). We are also conducting further studies on grabs suitable for gripping hull cans for safer and more reliable retrieval of the hull cans.

Oral presentation

Cell killing effects of charged particles on Melanoma of canine spontaneous tumor

Ito, Takashi*; Wada, Seiichi*; Kakizaki, Takehiko; Kobayashi, Yasuhiko; Natsuhori, Masahiro*; Sano, Tadashi*; Sasaki, Nobuo*; Ito, Nobuhiko*

no journal, , 

no abstracts in English

27 (Records 1-20 displayed on this page)