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Journal Articles

Status of decommissioning of FUGEN Decommissioning Engineering Center

Takiya, Hiroaki; Aratani, Kenta; Awatani, Yuto; Ishiyama, Masahiro; Tezuka, Masashi; Mizui, Hiroyuki

Dekomisshoningu Giho, (59), p.2 - 12, 2019/03

FUGEN Decommissioning Engineering Center received the approval of the decommissioning program in 2008, and we have been progressing the decommissioning. The first phase of decommissioning (Heavy Water and Other system Decontamination Period) finished in May 2018, and FUGEN has entered into the second phase of decommissioning (Reactor Periphery Facilities Dismantling Period). This report outlines the results obtained in the first phase of decommissioning of FUGEN.

Journal Articles

Distance Information Display System using augmented reality for supporting decommissioning work

Miki, Naoya*; Harazono, Yuki*; Ishii, Hirotake*; Shimoda, Hiroshi*; Koda, Yuya

Proceedings of 2nd International Conference on Computer-Human Interaction Research and Applications (CHIRA 2018) (USB Flash Drive), p.134 - 140, 2018/09

In this study, in order to make measuring lengths of the objects and the gaps at NPPs more efficient, the Distance Information Display System was developed, which make it easy for the dismantling workers to measure them. The results showed that the Distance Information Display System developed in this study can be used easily with extremely simple operation by the dismantling workers at NPPs, and the workers can also measure the lengths in a short time.

Journal Articles

Decommissioning of VHTRC

Takeuchi, Motoyoshi; Nakajima, Katsutoshi; Fukumura, Nobuo*; Nakayama, Fusao*; Ohori, Hideshi*

Dekomisshoningu Giho, (24), p.27 - 46, 2001/09

no abstracts in English

Journal Articles

Decommissioning nuclear facilities in safety

Tanaka, Mitsugu

Gijutsu To Keizai, (412), p.46 - 51, 2001/06

no abstracts in English

JAEA Reports

Measures of closing report of outside waste storage pits separate volume part II; Data collections about measurement of contamination and measurement after decontamination in outside waste storage pits

; Sukegawa, Yasuhiro*; *; ; ; *; Miyo, Hiroaki

JNC-TN8440 2000-022, 180 Pages, 2000/10

JNC-TN8440-2000-022.pdf:12.16MB

At outside waste strage pits, containers for strage of wastes corroded and were flooded, and it was confirmed on August 26, 1997. Confirmation of contamination of the pits outskirts, installation of sheets to prevent rainwater from flowing into the pits, drawing stay water were executed, promptly. Design and authorization works of the work house and waste treatment devices to take out wastes of the pits were executed too. After construction of the work house, taking out wastes of the pits started, and finished on April 10, 1998. Investigations of the inflow point of rainwater and leak of stay water were executed next. The results were reported to Science and Technology Agency (STA), adjoining authorities on December 21, 1998. After decontamination of the pits inner walls to background level of the radioactivity which included general concrete, control area was removed, and the pits were closed by concrete. Measures of closing of the pits were prepared from the middle of August, 1999, and dismantlement of unnecessary instruments started. Decontamination of the pits started from the beginning of September, 1999. The above works finished on June 30, 2000. After decontamination of the pits, STA, adjoining authorities confirmed the dircumstances. Work pouring concrete into the pits was executed three times (three levels), and finished on August 31, 2000. In addition to above, the amount of concrete poured into the pits was about 1,200 m$$^{3}$$. These data compiled the inspection of contamination in measures of closing of the pits.

JAEA Reports

Measures of closing report of outside waste storage pits

; ; ; Miyo, Hiroaki; Sukegawa, Yasuhiro*; *; *

JNC-TN8440 2000-020, 500 Pages, 2000/10

JNC-TN8440-2000-020.pdf:25.91MB

At outside waste storage pits, containers for storage of wastes corroded and were flooded, and it was confirmed on August 26, 1997. Confirmation of contamination of the pits outskirts, installation of sheets to prevent rainwater from flowing into the pits, drawing stay water were executed, promptly. Design and authorization works of the work house and waste treatment devices to take out wastes of the pits were executed too. After construction of the work house, taking out wastes of the pits started, and finished on April 10, 1998. Investigations of the inflow point of rainwater and leak of stay water were executed next. The results were reported to Science and Thechnology Agency (STA), adjoining authorities on December 21, 1998. After decontamination of the pits inner walls to background level of the radioactivity which included general concrete, control area was removed, and the pits were closed by concrete. Measures of closing of the pits were prepared from the middle of August, 1999, and dismantlement of unnecessary instruments started. Decontamination of the pits started from the begining of September, 1999. The above works finished on June 30, 2000. After decontamination of the pits, STA, adjoining authorities confirmed the circumstances. Work pouring concrete into the pits was executed three times (three levels), and finished on August 31, 2000. In addition t0 above, the amount of concrete poured into the pits was about 1,200 m$$^{3}$$.

JAEA Reports

None

*; *

JNC-TJ8420 2000-013, 96 Pages, 2000/03

JNC-TJ8420-2000-013.pdf:6.04MB

no abstracts in English

JAEA Reports

Disassembly and removal of 50MW steam generator test facility; Disassembly and sodium removal of the large cold trap

JNC-TN9410 2000-003, 52 Pages, 1999/12

JNC-TN9410-2000-003.pdf:3.51MB

In May, 1999, disassembly and cleansing of sodium residues contained in the large cold trap (50MWSG) were carried out. Two cold trap units, one from the primary sodium loop and the other from the for the secondary sodium loop were disassembled and cleaned. This report describes the procedures, methods, and tasks under taken in the clean-up effort, including countermeasures for safe handling of sodium. The disassembly of the cold trap was based an information regarding similar cleansing activities external to JNC. There was also same a priori knowledge of the type and amount of sodium-laden residues. As this result, we conducted disassembly and cleansing task as provisionally planned. In fact we learned that disassembly methods for the specific components could be conducted in an aerated atmosphere. We thus gained additional disassembly and sodium cleansing experience under manageable and safe conditions.

JAEA Reports

None

Miyo, Hiroaki; ; *; Asami, Makoto*; *; *; *

PNC-TN8440 96-010, 171 Pages, 1996/03

PNC-TN8440-96-010.pdf:9.98MB

None

Journal Articles

Completion of the Japan Power Demonstration Reactor decommissioning program; Experience and waste management

Miyasaka, Yasuhiko; Tanaka, Mitsugu

10th Pacific Basin Nuclear Conf. (10-PBNC), 2, p.1223 - 1230, 1996/00

no abstracts in English

Journal Articles

The Decommissioning program for JAERIs reprocessing test facility

; Miyajima, Kazutoshi

Dekomisshoningu Giho, (6), p.61 - 71, 1992/11

no abstracts in English

Oral presentation

Current status of Fugen decommissioning Project and my work

Koda, Yuya

no journal, , 

no abstracts in English

Oral presentation

Specialized training on decommissioning

Matsushima, Akira; Nakayama, Tamotsu; Soejima, Goro; Takiya, Hiroaki; Isomi, Kazuhiko

no journal, , 

no abstracts in English

Oral presentation

Dismantlement status and future plans in FUGEN

Aratani, Kenta; Ishiyama, Masahiro; Awatani, Yuto; Miyamoto, Yuta; Tezuka, Masashi

no journal, , 

no abstracts in English

Oral presentation

Acquisition and analysis of alpha-radioactivity data for glove box dismantling

Yoshida, Masato; Kawasaki, Kohei; Aita, Takahiro; Tsubota, Yoichi; Kikuchi, Ryo*; Honda, Fumiya

no journal, , 

no abstracts in English

Patent

物品搬出入システム及び物品搬出入方法

吉田 将冬; 平野 宏志; 木村 泰久; 川崎 猛; 周治 愛之

not registered

JP, 2018-170691  Patent licensing information

【課題】汚染雰囲気に曝される物を最小限に抑えて、汚染雰囲気に対して物品を安全に搬出入可能な物品搬出入システムを提供する。 【解決手段】物品搬出入システムは、汚染雰囲気を囲って非汚染雰囲気から隔離すると共に、汚染雰囲気及び非汚染雰囲気を連通させる開口が形成されたポートを有する建屋と、物品が載置される載置部、及び把持可能な把持部を有する載置台と、可撓性を有する材料で構成されており、開放された両端部のうち、一方側端部が前記開口を囲むようにポートに接続され、他方側端部が載置部を囲むように載置台に接続される筒状部材と、筒状部材から露出した把持部を把持して、ポートを通じて載置台を建屋に搬入し、さらに建屋から搬出する搬出入装置と、載置台が建屋から搬出された後に、ポートと載置台との間で筒状部材をシールするシール装置とを備えることを特徴とする。

16 (Records 1-16 displayed on this page)
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