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Abstract
A model is presented for numerically calculating the transient currents and voltages Induced in the buried cables by an impinging Nuclear Electromagnetic Pulse (NEMP). The conventional transmission line theory is applied in mathematical modeling of the buried cables in the presence of a uniform plane travelling wave. At first, the NEMP field at the buried cable is obtained from the theory of plane wave transmission and reflection at the air/earth interface. Then, short circuit current in the shield of the cable for different earth conductivities and angles of incidence are computed using the series impedance per unit length of the buried cable. The transient voltage induced in the centre conductor of the shielded buried cable for different load conditions is computed from the short circuit shield current and the surface transfer impedance of the shield. The induced voltage is calculated separately for solid metallic conduit and braided shield and the results are given in graphical form.