MCNP 5 user guide.

Current applications for the code include among others:
Design of accelerator spallation targets, particularly for neutron scattering facilities; Investigations for accelerator isotope production and destruction programs, including the transmutation of nuclear waste; Research into accelerator-driven energy sources; Medical physics, especially proton and neutron therapy; Investigations of cosmic-ray radiation backgrounds and shielding for high altitude aircraft and spacecraft; Accelerator-based imaging technology such as neutron and proton radiography; Design of shielding in accelerator facilities; Activation of accelerator components and surrounding groundwater and air; Investigation of fully coupled neutron and charged-particle transport for lower energy applications; High-energy dosimetry and neutron detection; Design of neutrino experiments; Comparison of physics-based and table-based data; Charged-particle tracking in plasmas; Charged-particle propulsion concepts for spaceflight; Single-event upset in semiconductors, from cosmic rays in spacecraft or from the neutron component on the earth's surface; Detection technology using charged particles (i.e., abandoned landmines); Nuclear safeguards; Nuclear criticality safety; Radiation protection and shielding; Oil well logging.

I have to write some input for MCNP for one of my classes. The graduate student had given us a lecture and some examples, but I'm trying to find some more detailed documentation, but even anything basic would be nice.

The one I did run across, from LANL, I needed authorization to view, why is that?