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Commercial nuclear innovation "new space" age
In early 2006, a start-up company launched a small rocket from a tiny island in the Pacific. It exploded, showering the island with debris. A year later, a second launch attempt sent a rocket to space but failed to make orbit, burning up in the atmosphere. Another year brought a third attempt—and a third failure. The following month, in September 2008, the company used the last of its funds to launch a fourth rocket. It reached orbit, making history as the first privately funded liquid-fueled rocket to do so.
Jacob P. Gorton, Nicolas R. Brown (Penn State), Soon Kyu Lee, Yonho Lee (Univ of New Mexico)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 1022-1027
We present the results of a preliminary comparison of low-pressure transient critical heat flux (CHF) tests conducted in a closed tube test section and best-estimate simulation results. We compare low-pressure experimental CHF test results for stainless steel 316 (SS316) and Inconel 600 test sections to results predicted by models developed in two widely-used thermal hydraulics codes; the system code RELAP5-3D and the Consortium for Advanced Simulation of LWRs (CASL) version of CTF. The objective of the comparison was to determine how well the models would predict CHF and post-CHF tube temperatures and rewetting behavior. The RELAP5-3D and CTF models conservatively predicted the heat flux at which CHF was exceeded for the SS316 models, but both codes showed that CHF was exceeded at a greater heat flux than in the experiment for the Inconel 600 case. RELAP5-3D and CTF overpredicted the post-CHF tube temperature in the SS316 model but underpredicted the Inconel tube temperature, thus demonstrating the need for improved CHF and post-CHF prediction methods for various materials.
