In what condition does one reactor supply steam to two different plants?

The scenario in which one reactor supplies steam to two different plants is best described as a cross-connected steam plant. In this configuration, steam produced by a single reactor is directed to two separate steam plants for use in propulsion and auxiliary systems. This setup is particularly advantageous for flexibility and efficiency, enabling one reactor to meet the steam demands of multiple plants, which can enhance operational capability and improve safety by providing redundancy.

In a cross-connected steam plant condition, the design allows for the integration of systems that might operate independently under normal conditions, but can also function in tandem when needed. It maximizes the use of resources and steam generation while maintaining critical systems operational.

Other conditions such as a locked shaft condition, split steam plant condition, and trailing shaft condition refer to specific operational scenarios but do not pertain to the capability of a single reactor supplying steam to multiple plants in the same way as a cross-connected steam plant does.