ISR-1 Seminar: Nuclear Cloud Lofting

Walker, Andrew Charles¹ 

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

关键词: RADIOACTIVE CLOUDS;    NAVIER-STOKES EQUATIONS;    DELAYED GAMMA RADIATION;    HEIGHT;    ITERATI;   

DOI  :  10.2172/1248115
RP-ID  :  LA-UR--16-22484
PID  :  OSTI ID: 1248115
Others  :  TRN: US1601256

美国|英语

来源: SciTech Connect

【 摘 要 】

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.