A conceptual DT fusion reactor is described that is based upon the dense Z-pinch (DZP). This study emphasizes plasma modelling and the parametric assessment of the reactor energy balance. Numerical models have been developed and evaluated to achieve this goal. The resulting optimal reactor operating point promises a high-Q, low-yield system of a scale that may allow the use of conventional high-voltage Marx/water-line technology to drive a potentially very small reactor system.