{'fraction_non_alphanumeric': 0.00804289544235925, 'fraction_numerical': 0.004021447721179625, 'mean_word_length': 5.024193548387097, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Assessment of Using the Surface Source Approach in 3-D Neutronics of Fusion Systems

The accuracy of the results obtained using the surface source write/read feature of MCNP for toroidal fusion systems was assessed. Techniques that enhance the effectiveness of the surface source method were identified. Accurate results can be obtained for a specific component in a fusion system by either inserting the detailed component CAD geometry in the full model for the fusion system or utilizing the surface source approach provided that the surface source and associated reflective boundaries are extended beyond the component of interest by at least ~10 cm and the surface source is placed as close as possible to the front surface of that component.