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 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
Latest Magazine Issues
Apr 2026
Jan 2026
Latest Journal Issues
Nuclear Science and Engineering
May 2026
Nuclear Technology
February 2026
Fusion Science and Technology
Latest News
DTRA’s advancements in nuclear and radiological detection
A new, more complex nuclear age has begun. Echoing the tensions of the Cold War amid rapidly evolving nuclear and radiological threats, preparedness in the modern age is a contest of scientific innovation. The Research and Development Directorate (RD) at the Defense Threat Reduction Agency (DTRA) is charged with winning this contest.
Om Prakash Joneja, Vijay R. Nargundkar
Fusion Science and Technology | Volume 8 | Number 3 | November 1985 | Pages 2721-2726
Technical Note | Blanket Engineering | doi.org/10.13182/FST85-A24693
Articles are hosted by Taylor and Francis Online.
The multilayered blanket concept introduced initially in spherical geometry has been extended to tokamak geometry, which has been approximated by an annular disk geometry for the present calculations. Tritium production is determined, using such commonly available materials as lead, natural lithium, and graphite/water. The Morse-E general geometry package is employed to simulate the blanket geometry and the plasma region where the neutrons are produced. Calculations are performed for both the block- and the multilayered-type blanket configurations. Using water as a moderator/reflector, the multilayered arrangement gives a 75% higher tritium production compared to the block-type blanket with the same overall size of assembly. The advantage in tritium breeding due to the multilayered arrangement remains practically the same when 10 vol% stainless steel structural material is used; however, the absolute value of tritium breeding decreases by 6 to 8%. Calculations are reported for a homogeneous, block, and multilayered arrangement of materials. Using lead, natural lithium, and water in the annular disk geometry, an overall thickness of 35 cm would be sufficient to give tritium breeding of 1.32/source neutron.