A power system supplying a steady power of 100 MW via a radial feeder is found to be occasionally prone to a 107 MW power demand transient surge of 10 millisecond duration. Making any assumptions as necessary design an inertial mass unit capable of supply the transient. Expected: outline design, calculations and discussion of operation of the inertial mass system.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.