Jun Miura
Hitachi
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10th International Conference on Nuclear Engineering, Volume 2 | 2002
Hiroshi Ijichi; Toshio Yamashita; Masahiro Tsutagawa; Hiroya Mori; Nobuaki Ooshima; Jun Miura; Minoru Kanechika; Nobuaki Miura
Construction of a nuclear power plant (NPP) requires a very long period because of large amount of construction materials and many issues for negotiation among multiple sections. Shortening the construction period advances the date of return on an investment, and can also result in reduced construction cost. Therefore, the study of this subject has a very high priority for utilities. We achieved a construction period of 37 months from the first concrete work to fuel loading (F/L) (51.5 months from the inspection of the foundation (I/F) to the start of commercial operation (C/O)) at the Kashiwazaki-Kariwa NPPs No. 6 and 7 (KK-6/7), which are the first ABWR plants in the world. At TEPCO’s next plant, we think that a construction period of less than 36 months (45 months from I/F to C/O) can be realized based on conventional methods such as early start of equipments installation and blocking of equipment to be brought in advance. Furthermore, we are studying the feasibility of a 21.5-month construction period (30 months from I/F to C/O) with advanced ideas and methods. The important concepts for a 21.5-month construction period are adoption of a new building structure that is the steel plate reinforced concrete (SC) structure and promotion of extensive modularization of equipment and building structure. With introducing these new concepts, we are planning the master schedule (M/S) and finding solutions to conflicts in the schedule of area release from building construction work to equipment installation work (schedule-conflicts). In this report, we present the shortest construction period and an effective method to put it into practice for the conventional general arrangement (GA) of ABWR. In the future, we will continue the study on the improvement of building configuration and arrangements, and make clear of the concept for large composite modules of building structures and equipment.Copyright
12th International Conference on Nuclear Engineering, Volume 2 | 2004
Taihei Yotsuya; Kouichi Murayama; Jun Miura; Akira Nakajima; Junichi Kawahata
A composite module construction method is to be examined reflecting one of the elements of construction rationalization of a future nuclear plant planned by Hitachi. This concept is based on accomplishments and many successes achieved by Hitachi through application of the modular construction method to nuclear power plant construction over 20 years. The feature of the composite module typically includes a planned civil structure, such as a wall, a floor, and a post, representing modular components. In this way, an increased level of rationalization is expected in the conventional large-scale nuclear plants. Furthermore, the concept aiming at the modularization of all the building parts comprising medium- or small-scale reactors is also to be examined. Additional aims include improved reductions in the construction duration and rationalization through use of the composite module. On the other hand, present circumstances in nuclear plant construction are very pressing because of economic pressures. With this in mind, Hitachi is pursuing additional research into the introduction of drastic construction rationalization, such as the composite module. This concept is one of the keys to successful future plant construction, faced with such a severe situation.Copyright
Electrical Engineering in Japan | 1998
Toshiaki Yoshinaga; Akira Nakajima; Yasuhiro Kobayashi; Masanori Takamoto; Jun Miura
A scheduling algorithm has been developed for resource leveling in a plant construction schedule. The algorithm facilitates resource profile smoothing as well as resource peak flattening, through a combination of global leveling with a variance-based performance index and local leveling. The local resource leveling, done after the global leveling, further improves minor fluctuations and local peaks in the resource profile that are insensitive to the variance-based performance index. The local resource leveling is based on two steps: definition of a target resource profile for chosen local time intervals; and heuristic optimization which shifts the resource profile towards the target curve. The scheduling algorithm developed has been experimentally applied to a practical problem of simulating a plant construction schedule with about 5000 tasks. It was confirmed from the numerical results that local resource leveling is a promising way to refine the resource profile after global resource leveling.
Archive | 1995
Ikuya Arai; Kouji Kitou; Jun Miura
Archive | 1996
Ikuya Arai; Kouji Kitou; Jun Miura
Archive | 2001
Hiroshi Hasegawa; Ryohei Miyahara; Kouichi Ushiroda; Masataka Aoki; Akinori Tajiri; Jun Miura
Nuclear Engineering and Design | 2006
Naohiro Nakamura; Kouichirou Tanaka; Hiroshi Tokuhira; Jun Miura
Archive | 1999
Hisako Okada; Hiroshi Hasegawa; Jun Miura; Ryohei Miyahara; Kouichi Ushiroda
The Proceedings of the National Symposium on Power and Energy Systems | 2000
Hisako Okada; Jun Miura
The Proceedings of the National Symposium on Power and Energy Systems | 2004
Kazuto Tatehora; Jun Miura; Hisako Okada