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Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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.
T. C. Chawla
Nuclear Science and Engineering | Volume 48 | Number 4 | August 1972 | Pages 397-402
Technical Paper | doi.org/10.13182/NSE72-A22507
Articles are hosted by Taylor and Francis Online.
Through the use of potential flow theory, an expression for two-dimensional axisymmetric pressure distribution in an “infinite” plenum for a coolant-expulsion process in a single-subassembly accident is obtained. An expression for the temporal distribution of the corresponding spatially averaged pressure at the exit of a fuel subassembly is also obtained. The illustrative example considered indicates that the use of a fixed-pressure boundary condition instead of a time-dependent-pressure boundary condition at the exit (or at the inlet) of a subassembly is not valid for very rapid transients, such as due to molten fuel-coolant interaction or to rapid release of fission gas from simultaneous or near-simultaneous breach of several pins near the top of the core region. Furthermore, the results of sample calculations presented for an FFTF subassembly indicate the possibility that, for a sufficiently rapid transient, the transient pressure in the exit region of the subassembly can fall to the saturation pressure of the sodium and result in local boiling during the expulsion in the exit region of the subassembly. The expression developed here for the transient, spatially averaged pressure distribution in the plenum at the exit of a subassembly could be coupled with the one-dimensional type of analysis of the expulsion process in the fuel subassembly.