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South Korea Exploring Floating NPPs

Power News - Published on Thu, 15 Oct 2020

Image Source: Korea Floating NPPs
Korea Electric Power Technology has signed a memorandum of understanding for long-term cooperation with Daewoo Shipbuilding & Marine Engineering on 24 September to jointly advance marine nuclear power plant technology development. The MOU related to Kepco’s nuclear power plant design and construction technology and Daewoo Shipbuilding & Marine Engineering's marine nuclear technology development based on various shipbuilding experiences and know-how, business discovery, and joint project execution. Since 2016, Kepco E&C has been developing Bandi-60, a small modular reactor for offshore use, and the development of a floating offshore NPP equipped with Bandi-60 is expected to gain momentum from this agreement

According to Kepco, the design of Bandi-60 is mainly rooted in proven technologies including Kepco E&C’s experience of over 40 years in conventional NPP engineering services in Korea and overseas. Bandi-60 is a 200MWt block-type pressurised water reactor. The block-type design, in which main components are directly connected, nozzle-to-nozzle, instead of using connecting pipes, eliminates the possibility of a major loss of coolant accident and also provide improved operational surveillance and maintenance compared with the integral type design, Kepco said. For the steam generator (SG), a U-tube recirculation type is currently the basic option as its performance has been proven during a long period of operational experience in commercial NPPs. However, as an advanced design option, Kepco E&C is now working on a new steam generator based on plate and shell heat exchanger technology, which would reduce the size by 3-5 times.

The pressuriser is integrated into the upper head of the reactor pressure vessel where a relatively large water and steam volume is provided, compared with conventional NPPs. The pressure is controlled by heaters and sprays. The control element drive mechanism is installed inside the RPV.

The reactor core is composed of 52 fuel assemblies. The fuel is a conventional UO2 fuel enriched up to 4.95 % in 17x17 square array. Low power density is achieved by adopting a core configuration consisting of 52 fuel assemblies with a 2-metre-long active fuel length, and a nominal thermal power of 200 MWt. The control rods for have more burnable absorbers to control the excess reactivity of fuel over core life time to maintain boron free operation under normal conditions.

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Posted By : Yogender Pancholi on Thu, 15 Oct 2020
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