Primary circuit configuration

Plant Primary circrrit configuration Drive fuel charge 

BN-600 (Russian Federation) pool UO2 first, Partly PUO2-UO2 later 

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The term channel induction furnace is appHed to those in which the energy for the process is produced in a channel of molten metal that forms the secondary circuit of an iron core transformer. The primary circuit consists of a copper cod which also encircles the core. This arrangement is quite similar to that used in a utdity transformer. Metal is heated within the loop by the passage of electric current and circulates to the hearth above to overcome the thermal losses of the furnace and provide power to melt additional metal as it is added. Figure 9 illustrates the simplest configuration of a single-channel induction melting furnace. Multiple inductors are also used for appHcations where additional power is required or increased rehabdity is necessary for continuous operation (11). 

Primary coolant circulation is provided by main coolant pumps (MCP) with canned asynchronous motors that are installed on the reactor cover. As an additional benefit, simple configuration and short length of the primary circuit path permit to sustain high flow rate of... 

A Reference Design for the primary circuit of a 60 MWt experimental fast reactor is completed. Some parameters and characteristics have been selected mostly based on the Integral Fast Reactor (IFR) concept. Fuel pin dimensions and other data were used for calculations which lead to a general core configuration. Some calculations were also independently performed at lEN, and the differences in methodologies are being evaluated. Table 1 shows the main primary circuit parameters. 

The whole Primary Circuit contained in the reactor vessel is a feature which leads to a multi-module NPP configuration suitable for large interconnected electrical grids. 

Considering the integrated Primary System configuration, no significant breaks in the primary circuit are conceivable, but only a loss of pressure boundary of the Intermediate Pool. The cross section of the largest pipe of the Intermediate Pool is limited to about 0.01 m. All pipe connections are furthermore located at a higher elevation than the core. 

Core configuration Suspended core, integrated primary circuit. 

System simplification, for example, resulting from integral design of the primary circuit or from adjacent configuration of the primary and intermediate circuits (BMN-170, MDP, RBEC-M, Medium Scale Lead-bismuth Cooled Reactor) or from a natural circulation based primary circuit (a gas lift system is used to facilitate natural circulation in the RBEC-M), or from the use of passive systems for reactor shutdown and decay heat removal always resulting in the reduced number of structures, systems and components such as piping, main circulation pumps, active shutdown systems, etc. 

Primary selective circuit arrangements utilize two primary selectable feeders for each transformer. These feeders are either connected to the line side of two interlocked primary non-fused disconnect switches that have a common load side fuse or to the line side of two interlocked primary fused disconnect switches. The latter configuration is shown in Fig. 2. Only one primary disconnect switch can be closed at any time. 

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