from damage in the case of coil failure. The rapid release of energy in case of coil failure might damage surrounding systems. Some conceptual designs propose to incorporate a superconducting cable into the design with as goal the absorption of energy after coil failure. The system also needs to be kept in excellent electric isolation in order to prevent loss of energy. See also Grid energy storage United States Department of Energy International Energy Storage Database References Bibliography Sheahen, T., P. (1994). Introduction to High-Temperature Superconductivity. Plenum Press, New York. pp. 66, 76–78, 425–430, 433–446. El-Wakil, M., M. (1984). Powerplant Technology. McGraw-Hill, pp. 685–689, 691–695. Wolsky, A., M. (2002). The status and prospects for flywheels and SMES that incorporate HTS. Physica C 372–376, pp. 1,495–1,499. Further reading External links Cost Analysis of Energy Storage Systems for Electric Utility Applications Loyola SMES summary Superconductivity Energy storage