The figure shows how a thermal storage could be fit in to a Nuclear power plant. Normally the heated steam from such a plant goes directly to steam turbines that generate electricity by way of generators. The most efficient use of such a power plant is to have it run at high capacity at all times; however, the market’s demand for power vary through a 24 hour cycle as well as by seasonal cycles.
The storage as such implies relatively very small loss of energy because it is well insulated. As will be demonstrated by examples this kind of storage has a potential for generating very large economical value. A thermal power station which generates electricity by way of turbines and electric generators will also generate waste heat. Waste heat that does not recycle into the system may have a market value when delivered to suitable customers in the vicinity. In such case equation 1 may be augmented with and additional income term for the sale value of this heat.