Installation, large modular

Bipolar electrolyzers can be isolated from the alternating current (AC) side or by direct current (DC) disconnect switches and do not always require portable switches or jumper bus. While not strictly required, the latter may be used to allow one modular zone of an electrolyzer to be taken out of service while the rest stays in operation. This is in the interest of reducing the loss in production during replacement of cells. The large capacity of individual bipolar electrolyzers means that relatively few units are installed. Taking an entire electrolyzer out of production may cause a significant drop in output. 

The main objective was to design a multi-purpose NPP based on a modular reactor installation with a sodium cooled fast reactor in support of economic, reliable and safe solutions to the issues of power and heat supply to consumers independent of large power... 

Licensing of the construction of a modular type large power unit will be essentially simplified if an industrial prototype of the reactor or a first-of-a-kind small modular power unit would be licensed and constructed first. Correspondingly, the low power of a reactor installation would determine a comparatively low cost of construction. 

A simple scheme of the reactor module and the fact that all modules installed are of the same type make it possible to reduce the number of personnel for operation and maintenance of the modular NPP as compared with the NPP unit comprising one large-power reactor that incorporates many safety systems, such as protection systems, localizing accident systems, and control and auxiliary systems. For example, the safety systems of the AP-1000 reactor [XIX-16] have 184 pumps, 1400 valves, and 40 km of pipelines and cables [XIX-16]. 

Licensing of a large power modular unit construction will be much more simplified once SVBR-75/100 equipment is certified and SVBR-75/100 prototype is constructed. Small power of the reactor installation defines a comparatively low cost of its construction. The... 

Major economic improvements for SMART can be summarized as system simplification, component modularization, factory fabrication, direct site installation of components and reduced construction time. The integral arrangement of the primary reactor systems requires only a single pressurized vessel and removes large-sized pipes connecting primary components. The adoption of simplified passive systems provides a net reduction in the number of safety systems and drastically reduces the number of valves, pumps, wirings and cables, pipes, etc. 

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