CHMCK--a Monte Carlo criticality program for complicated geometry systems

CHMCK is a Monte Carlo criticality program used for complex geometrical nuclear systems. The nuclear system considered might be composed of units, each of which could be divided into several regions with different materials. The surface of the regions consist of one of conics rotating surfaces (planes, spheres, cylinders, cones, paraboloids, ellipsoids or hyperbololds) or their combination. The axis of the rotating surface may be oritented in any manner and the surfaces may intersect with each other in arbitrary fashion. Thus CHMCK is applicable to the majority of criticality calculations. Comparing with the famous program KENO, CHMCK has the merits of convenience and intuition for inputing and operating due to the adopting of maximum cross section method in neutron transport wich simplifies the program and saves the CPU time for complex geometry