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.
Explore membership for yourself or for your organization.
Conference Spotlight
2026 Nuclear Energy Conference & Expo (NECX)
August 24–27, 2026
Dallas, TX|Hilton Anatole
Latest Magazine Issues
Aug 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
October 2026
Nuclear Technology
September 2026
Fusion Science and Technology
August 2026
Latest News
Front-end nuclear fuel supply cooperation: Turning allied interdependence into strategic advantage
The global nuclear revival, which is fueled by unprecedented demand for firm, affordable, dispatchable power for artificial intelligence and data center build-out, energy security imperatives, and climate commitments, has exposed a structural reality of the Western fuel cycle: No single allied nation currently possesses the full suite of front-end capabilities. From mining through conversion, enrichment, fabrication, and the emerging deconversion and metallization steps required for reactor fuels, capability is distributed across Canada, France, Japan, the United Kingdom, and the United States (collectively, the “Sapporo Five”), as well as a small group of close partners.
R. N. Hwang
Nuclear Science and Engineering | Volume 39 | Number 1 | January 1970 | Pages 32-49
Technical Paper | doi.org/10.13182/NSE70-A21169
Articles are hosted by Taylor and Francis Online.
This paper is a sequel to the previous work on the theory and application of the multilevel formalism to Doppler effect analysis. The first part of this paper gives some quantitative results in both the resolved and the unresolved resonance regions. Detailed discussions on the interpretation and analysis of these results are given. The second part of this paper describes some further studies on the statistical behavior of the S-matrix parameters with the emphasis on the residues. Both theoretical predictions and numerical results for cases pertinent to the reactor Doppler-effect analysis are given.