14Other options may exist for some grids. For example, large-scale industrial customers may be requested to curtail their power consumption at certain times in order to offset a deficit in supply. An example of this might be an aluminum smelter (which uses hundreds of megawatts of electricity to reduce alumina powder to molten aluminum metal) operating as a sheddable load while the same grid employs a nuclear fission power plant as one of its sources. If the nuclear generator’s reactor happens to “scram” (shut down for any reason), that reactor’s power output will drop off the grid immediately, which may constitute hundreds of megawatts of lost generation. In such an event, the grid dispatch system may issue a “load shed” command to the aluminum smelter to drop a substantial portion of its consumption, as it may not be practical to immediately bring that much extra power on-line from some other source.