ISR-1 Seminar: Nuclear Cloud Lofting

Technical Report · Wed Apr 13 00:00:00 EDT 2016

DOI:https://doi.org/10.2172/1248115· OSTI ID:1248115

Walker, Andrew Charles ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

This report goes into detail about motivation, background, lofting methodologies (empirical, parcel methods, Navier-Stokes), DELFIC Model, validation, DIORAMA integration, and has the following conclusions: A parcel methodology was applied to develop the DIORAMA cloud lofting module. It is based on the DELFIC model and treats the cloud as a homogenous unit. It solves the set of 8 ODEs for cloud properties. It outputs the time history of the cloud height, radius, and other parameters. The cloud lofting module was tuned with 54 test cases. An iterative brute force search was carried out to find the best fit tuning parameters. The best fit parameters yielded average cloud height errors of 12.9% and 10.3% for the bottom and top, respectively. This all allows for more accurate modeling of the propagation of delayed gamma rays in DIORAMA.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1248115
• Report Number(s): LA-UR-16-22484; TRN: US1601256
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
RADIOACTIVE CLOUDS
NAVIER-STOKES EQUATIONS
DELAYED GAMMA RADIATION
HEIGHT
ITERATIVE METHODS
VALIDATION
COMPUTERIZED SIMULATION
MATHEMATICAL MODELS
DIFFERENTIAL EQUATIONS
MATHEMATICAL SOLUTIONS
MOTION