ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
Jun 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
July 2025
Nuclear Technology
June 2025
Fusion Science and Technology
Latest News
Nominations open for CNTA awards
Citizens for Nuclear Technology Awareness is accepting nominations for its Fred C. Davison Distinguished Scientist Award and its Nuclear Service Award. Nominations for both awards must be submitted by August 1.
The awards will be presented this fall as part of the CNTA’s annual Edward Teller Lecture event.
Hans K. Fauske
Nuclear Science and Engineering | Volume 54 | Number 1 | May 1974 | Pages 10-17
Technical Paper | doi.org/10.13182/NSE74-A23388
Articles are hosted by Taylor and Francis Online.
This paper discusses some aspects of pin-to-pin failure propagation in a sodium-cooled fast-reactor subassembly resulting from (a) fission-gas release, (b) a local blockage, and (c) release of small amounts of molten fuel. The consequence of a severe flow dilution due to fission-gas release from a highly burned-up fuel pin is shown to give rise to only minor overheating because of the strong effects of fuel heat capacity, radial heat conduction, and mixing. Analysis has also shown that the occurrence of local boiling due to local blockage of detectable size appears unlikely to lead to dryout and flow instability because of the large subcooling effect in the wake downstream of the blockage. Moreover, even if a pin in a fuel assembly is assumed to fail and release small amounts of molten fuel, calculations indicate that heat losses and condensation will prevent any significant pressure generation and void propagation and therefore reduce the likelihood of rapid failure propagation.