Resonance Escape Probability in Water Lattice

In light water-moderated reactors the effects of adjacent fuel on resonance escape probability must be considered. These effects are a decrease of surface absorption and modification of the slowing down density by absorption. Modifications of the standard formula for calculating p are described and the results of detailed calculations on enriched uranium-dioxide fuel rods in water lattices are given. The effective resonance integral is calculated by the method of Wigner et al.