The answers code MONK - A new approach to scoring, tracking, modelling and visualisation

The Monte Carlo code MONK has a proven track record of application to the whole of the nuclear fuel cycle and is well-established in the UK criticality community. MONK is part of a continuing development programme comprising the code, nuclear data libraries, validation, guides, geometry model visualisation tools and productivity tools. This paper describes many developments that have been made or are being made to the MONK package, including: -) Enhancements to the geometry modelling capabilities such as CAD import using both IGES models and tetrahedral mesh models; -) Run-time Doppler broadening for the BINGO collision processor, to allow calculations to be performed at any temperature; -) Continuous-energy depletion to further enhance the depletion capabilities of the code in the Burnup Credit application area; -) Parallelization; -) Extensions to the parameter and formula input facilities to simplify model specification; -) Unified tally option to enable fluxes to be scored in user defined volumes by materials/energy groups and events to be scored in these user defined volumes by reaction type/material/nuclide/energy group; -) Updates to the BINGO continuous-energy nuclear data libraries including JEFF3.1, ENDF/B-VII and CENDL3.1; -) The Integrated Development Environment package Visual Workshop 2 allowing input data to be created and edited, geometries to be displayed and checked, and results displayed over the geometry; -) Productivity Tools - the on-going development of LaunchPad (within Visual Workshop), automatic output checking (MONKcheck), and a facility for launching MONK across a network of computers (CODEMORE). (authors)