Refine your search:     
Report No.
 - 
Search Results: Records 1-2 displayed on this page of 2
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

JAEA Reports

Safety measures in the melting facilities of The Advanced Volume Reduction Facilities; Document collection of discussion meetings related to melting facilities

Iketani, Shotaro; Yokobori, Tomohiko; Ishikawa, Joji; Yasuhara, Toshiyuki*; Kozawa, Toshiyuki*; Takaizumi, Hirohide*; Momma, Takeshi*; Kurosawa, Shingo*; Iseda, Hirokatsu; Kishimoto, Katsumi; et al.

JAEA-Review 2018-016, 46 Pages, 2018/12

JAEA-Review-2018-016.pdf:12.79MB

Japan Atomic Energy Agency (JAEA) adopts melting process for the waste processing and packaging method of radioactive miscellaneous solid waste in NSRI because melting process is effective in radioactivity evaluation, volume reduction, and stabilization treatment. Metal melting processing facilities, Incinerator, and Nonmetal melting processing facilities (hereinafter referred to as melting process facilities) have taken lots of safety measures, including measures for preventing the recurrence of the fire accidents. To exchange opinions and discuss the validity of these measures and so on with internal personnel and external experts, "Discussions on Melting Process Facilities" was held. As a document collection, this paper summarizes presentation materials of discussion meetings. Presentation materials describe "Outline of AVRF", "Safety measures in the melting facilities in WVRF", "Operation management of the melting facilities in WVRF", "Comparison of the past accident cases between facilities in and outside Japan and WVRF", and "Introduction of past accident cases and safety measures in other facilities from each committee".

Oral presentation

Remote handling test of Moderators and Reflector in J-PARC MLF

Oi, Motoki; Yamaguchi, Yuji; Teshigawara, Makoto; Naoe, Takashi; Kikuchi, Yoshinori*; Yasuhara, Toshiyuki*; Saruta, Koichi; Kinoshita, Hidetaka; Harada, Masahide

no journal, , 

In the neutron source of the Materials and Life Science Experimental Facility (MLF) in J-PARC, a reflector and three moderators are installed. Life time of the reflector and moderators are designed as 30,000 MWh. Spent moderators and reflectors are highly radioactive, so it must be replaced remotely. It has already been 15 years since the first beam of the MLF. Remote handling test was conducted in 2021 and 2022 using spare moderator and reflector in MLF's hot cell. In the remote handling test, there are some problems to replace irradiated moderators. It was found that there is a risk of damage to the poisoned moderator during installation and removal process. In addition, it was found that some slings were deformed and affected the work. Regarding the confirmed problems, we will make appropriate improvements and conduct a remote handling test again during the maintenance period in 2023. The replacement work of the actual moderators are scheduled to be carried out in 2024.

2 (Records 1-2 displayed on this page)
  • 1