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The passive safety system is considered an attractive alternative to cope with this kind of disaster. Also, the passive safety system enhances both the safety and the economics of NPPs. The adoption of a passive safety system reduces the number of active components and can minimize the construction cost of NPPs. In this paper, reflecting on the experience during the development of the APRþ design in Korea, we propose the concept of an innovative Power Reactor (iPower), which is a kind of passive NPP, to enhance safety in a revolutionary manner. The ultimate goal of iPower is to confirm the feasibility of practically eliminating radioactive material release to the environment in all accident conditions. | Nuclear Engineering and Technology 49 2017 1431 1441 Contents lists available at ScienceDirect Nuclear Engineering and Technology journal homepage www.elsevier.com locate net Original Article The concept of the innovative power reactor Sang Won Lee Sun Heo Hui Un Ha Han Gon Kim CrossMark Central Research Institute Korea Hydro Nuclear Power Co. Ltd. 70 1312-gil Yuseong-daero Yuseong-gu Daejeon 34101 Republic of Korea ARTICLE INFO ABSTRACT Article history Received 3 January 2017 Received in revised form 7 May 2017 Accepted 26 June 2017 Available online 13 July 2017 Keywords iPower PAFS Passive Safety System PCCS PECCS The Fukushima accident reveals the vulnerability of existing active nuclear power plant NPP design against prolonged loss of external electricity events. The passive safety system is considered an attractive alternative to cope with this kind of disaster. Also the passive safety system enhances both the safety and the economics of NPPs. The adoption of a passive safety system reduces the number of active components and can minimize the construction cost of NPPs. In this paper reflecting on the experience during the development of the APR design in Korea we propose the concept of an innovative Power Reactor iPower which is a kind of passive NPP to enhance safety in a revolutionary manner. The ultimate goal of iPower is to confirm the feasibility of practically eliminating radioactive material release to the environment in all accident conditions. The representative safety grade passive system includes a passive emergency core cooling system a passive containment cooling system and a passive auxiliary feedwater system. Preliminary analysis results show that these concepts are feasible with respect to preventing and or mitigating the consequences of design base accidents and severe accidents. 2017 Korean Nuclear Society Published by Elsevier Korea LLC. This is an open access article under the CC BY-NC-ND license http creativecommons.org licenses by-nc-nd .
