NOVELTY - A system (10B) has a ceramic heat storage medium (18) with an extended longitudinal section that extends along a longitudinal axis. The medium is formed with ceramic particles that cooperate and define voids between them to facilitate flow of a flow of heat transfer fluid (11b) in the longitudinal direction. The voids combine to define a longitudinal flow path along the longitudinal axis through the medium. The flow path has a port (28) to pass superheated working fluid (11a). The flow path has a region at the port to store the heat of working fluid at temperature Ta after the flow is stopped.    USE - System for a power plant with heat storage for providing stored heat for use in industrial power systems. Uses include but are not limited to solar power plants, combined cycle power plants (CCPP), Integrated Gasification Combined Cycle (IGCC) plants, coal and gas fired plants, nuclear plants, geothermal plants, and other operations that use superheated fluid to do work.    ADVANTAGE - The storage system overcomes thermal storage limitations and enables storage of heat at practically any temperature at which most power plants can operate. It is simple in design and is more robust and is relatively less expensive to implement and operate for large-scale applications. There are no compressors or boilers and only a few pumps. The entire system can be designed and manufactured for shipping by truck for easy assembly on location. It can also be designed for totally automatic control. The steam heat energy can be stored at very high efficiency and retrieved and used a cost savings. The system enables storage of solar energy and enables power generation at times when solar energy is not available. Conventional power plants can be equipped with heat storage capacity to store heat during off-peak time and use it for extra capacity during peak time or anytime when load following and control of grid fluctuations is needed. The power plant with the storage capability provides an improved control function for the grid. The peak load capacity of a power plant can be extended beyond its normal capacity with the addition of an auxiliary turbine and reducing the need for additional power plants for peak demands.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for heat storage for providing stored heat using a heat transfer fluid at or about temperature Ta in a power plant.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of a generic power plant with heat storage system.    Heat storage system (10B)    Superheated working fluid (11a)    Heat transfer fluid (11b)    Ceramic heat storage medium (18)    Port (28)