Decommissioning project feedback experience in the Japan Atomic Energy Research Institute

Yanagihara, Satoshi; Tachibana, Mitsuo; Miyajima, Kazutoshi

Proceedings of International Conference; Decommissioning Challenges (CD-ROM), 8 Pages, 2003/00

Several decommissioning projects are on going and studies on decommissioning issues are in progress in JAERI. The JPDR and JRTF decommissioning projects have been set up as demonstration programs for future decommissioning large nuclear facilities. Therefore, efforts have been made not only to dismantle the facilities but also to collect data and lessons learnt on dismantling activities. The data and lessons learnt have been analyzed to produce the database for future decommissioning projects by categorizing into manpower expenditure, radiation dose and waste generation in project data, and safety aspect, waste management, work efficiency considerations in lessons learnt. respectively. The feedback experience has been effectively contributed to various areas on decommissioning such as studies on regulatory systems and planning of other dismantling projects. This paper deals with decommissioning experience and lessons learned in JAERI.

Data analysis on worker dose in dismantling of Japan Power Demonstration Reactor (JPDR) (Contract research)

Shiraishi, Kunio; Sukegawa, Takenori; Yanagihara, Satoshi

JAERI-Data/Code 2001-028, 86 Pages, 2001/11

JAERI-Data-Code-2001-028.pdf:6.31MB

The data on worker dose in dismantling of the Japan Power Demonstration Reactor (JPDR) was analyzed to characterize its features. It was appeared from the study that the collective dose to the workers was 306 man-mSv, in which maximum individual dose was 8.5 mSv, almost all doses were received in the activities for dismantling of reactor internals, the reactor pressure vessel and the biological shield, and that the worker dose distribution was similar to that in the maintenanee of the facilities which was characterized by the hybrid log normal distribution model. Farthermore, it was found that the dismantling activities were categorized into three groups depending on dose rates in workplaces, then contribution factors for radiation exposure in terms of dose rates in different groups were derived based on the analysis. The study would be useful for estimation of worker dose in future decommissioning of commercial nuclear power plants in Japan.

Development of computer systems for planning and management of reactor decommissioning

Yanagihara, Satoshi; Sukegawa, Takenori; Shiraishi, Kunio

Journal of Nuclear Science and Technology, 38(3), p.193 - 202, 2001/03

https://doi.org/10.3327/jnst.38.193

no abstracts in English

Systems engineering approach to planning of nuclear power plant decommissioning; Application of JPDR dismantling data to Tokai Power Station Decommissioning

Yanagihara, Satoshi; Sukegawa, Takenori; Tanabe, Norio*; Takaya, Junichi*

Proc. of SPECTRUM'98, p.269 - 274, 1998/00

no abstracts in English

Systems engineering approach to planning and evaluation of nuclear power plant decommissioning

Yanagihara, Satoshi; ; Sukegawa, Takenori; Tachibana, Mitsuo

Proc. of 5th Int. Conf. on Nucl. Eng. (ICONE-5)(CD-ROM), 6 Pages, 1997/00

no abstracts in English

Systems engineering for decommissioning the Japan Power Demonstration Reactor(JPDR); A Study on characteristics of decommissioning waste

Yanagihara, Satoshi; ;

Proc. of the 1993 Int. Conf. on Nuclear Waste Management and Environmental Remediation,Vol. 3, p.423 - 431, 1993/00

no abstracts in English

Estimating the costs for Japans JPDR project

Yanagihara, Satoshi; Tanaka, Mitsugu

Energy J., Vol. 12 (Special Issue), p.135 - 148, 1991/00

no abstracts in English