Recent activities related to decommissioning in nuclear energy agency of OECD

Yanagihara, Satoshi

Dekomisshoningu Giho, (28), p.2 - 9, 2003/10

http://www.randec.or.jp/publish/documents/gihou/Decommissioning%20gihou_28.pdf

Decommissioning of nuclear facilities has been actively progressed in the major member countries participating to OECD/NEA. The NEA has recognized necessity of studying various issues related to decommissioning nuclear facilities and it has made an approach to solve the issues from various ways. In the cooperative program for decommissioning (CPD), information on decommissioning projects has been exchanged among the member countries. In the working party on decommissioning and dismantling (WPDD), recent issues have been studied in terms of regulation, implementation of decommissioning projects and research and development on technologies. Decommissioning cost and regulatory practices were also studies and the reports were published, which will be useful for understanding the present issues on decommissioning in the world. The NEA's activity on decommissioning will be valuable for us to implement decommissioning projects in safe and economical manner in Japan. This report deals with the recent NEA activities on decommissioning.

Mock-up test of remote controlled dismantling apparatus for large-sized vessels (Contract research)

Myodo, Masato; Okane, Shogo; Miyajima, Kazutoshi

JAERI-Tech 2001-025, 59 Pages, 2001/03

JAERI-Tech-2001-025.pdf:4.73MB

no abstracts in English

Dismantling work of the JAERI electron linac and measurement of induced radionuclides

Endo, Akira

Hoken Butsuri, 34(2), p.161 - 165, 1999/00

https://doi.org/10.5453/jhps.34.161

no abstracts in English

Development of risk assessment methodology for nuclear power plants in decommissioning phase, 1; Overview of risk assessment and selection of initiating events

Shimada, Taro; Sasagawa, Tsuyoshi; Miwa, Kazuji; Takai, Shizuka; Takeda, Seiji

no journal, , 

It is necessary to develop the methodology for risk assessment during decommissioning so as to select the components or tasks based on the risk-informed at the nuclear regulation inspection. The characteristic is that the radioactive contamination that may be released in the event of an accident fluctuates spatially and temporally as the dismantling work progresses. We have started to construct a methodology for the risk assessment in decommissioning phase. And an outline of risk assessment based on the characteristics of the dismantling work was created. The risk is defined as the product of exposure dose and frequency in this study. As a result of investigating cases of decommissioning and similar trouble events during periodic inspection work, many cases related to fire during cutting work at dismantling were found. Based on the results, quality engineering methods such as FMEA (Failure Mode and Effects Analysis) were used to select the initiating events due to human error. In addition, event trees were created assuming that the events progress due to the failure of mitigation measures for those initiating events.