nuclear14.gms:

References:

• Leyffer, S, MacMINLP: AMPL Collection of Mixed Integer Nonlinear Programs.
• Quist, A J, de Klerk, E, Roos, K, Terlaky, T, van Geemert, R, Hoogenboom, J E, and Illes, T, Finding Optimal Nuclear Reactor Core Reload Patterns Using Nonlinear Optimization and Search Heuristics. Engineering Optimization 32 (1999), 143-176.
• Original source: AMPL model c-reload.mod and c-reload-14a.dat from MacMINLP

Point: p1 
Best known point (p1): Solution value -1.13