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Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Ronald Kreutz
Fusion Science and Technology | Volume 8 | Number 3 | November 1985 | Pages 2708-2720
Technical Paper | ICF Driver Technology | doi.org/10.13182/FST85-A24692
Articles are hosted by Taylor and Francis Online.
A summary of the investigations on pellet delivery is presented for the conceptual heavy-ion-beam-driven fusion reactor HIBALL. The results are given for the physical feasibility of pneumatic and electromagnetic pellet acceleration, and proposals are made for adequate pellet carriers. These can be utilized for any inertial confinement fusion reactor concept. A suitable value is derived for the pellet velocity by regarding the heating of the pellet by cavity radiation. A pellet velocity of 200 m/s is chosen. It is shown that for this pellet velocity the pellet tracking and synchronization of the pellet with the ion pulses are consistently feasible with respect to adequate pellet illumination by the ion beams. The proposed conceptual pellet injectors are designed for a 2-g projectile, composed of the pellet and a pellet carrier, and for an acceleration distance of 2 m. To achieve a pellet velocity of 200 m/s, a propellant gas pressure of 0.5 MPa is required for pneumatic acceleration. Using a magnetic linear accelerator with coils of 1-cm radius and 1-cm spacing, an effective magnetic induction on the axis of 1.2 T is necessary. An adequate pellet carrier is designed for each of the acceleration methods. This is a closed capsule for pneumatic acceleration and an open carrier with a ferromagnetic driving body for electromagnetic acceleration. The two injection methods are compared and evaluated with respect to the technical feasibility of the corresponding system components in order to give a concluding recommendation.