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Proving DRACO will deliver
The United States is now closer than it has been in over five decades to launching the first nuclear thermal rocket into space, thanks to DRACO—the Demonstration Rocket for Agile Cislunar Orbit.
Massimo Zucchetti
Fusion Science and Technology | Volume 19 | Number 2 | March 1991 | Pages 294-303
Technical Paper | Safety Environmental Aspect | doi.org/10.13182/FST91-A29365
Articles are hosted by Taylor and Francis Online.
Waste management problems related to impurity activation in first-wall, shield, and magnet materials for fusion reactors are examined. Definitions of low activity based on hands-on recycling, remote recycling, and shallow land burial waste management criteria are discussed. Estimates of the impurity concentration in low-activation materials (elementally substituted stainless steels and vanadium alloys) are reported. Impurity activation in first-wall materials turns out to be critical after a comparison of impurity concentration limits and estimated levels. Activation of magnet materials is then considered: Long-term activity is not a concern, while short-term activity is. In both cases, impurity activation is negligible. Magnet materials, and all other less flux-exposed materials, have no practical limitation on impurities in terms of induced radioactivity.