Eco-Friendly High-Power Linacs
New-Generation Eco-Friendly High-Power Ion Linear Accelerators
Tech Area / Field
- PHY-PFA/Particles, Fields and Accelerator Physics/Physics
3 Approved without Funding
MRTI (Radio Techniques), Russia, Moscow
- ITEF (ITEP), Russia, Moscow
- Advanced Energy Systems, Inc., USA, NJ, Princeton\nCEA / DSM / DAPNIA/CEN Saclay, France, Saclay\nKorea Atomic Energy Research Institute (KAERI), Korea, Yuseong\nLos-Alamos National Laboratory, USA, NM, Los-Alamos\nInstitut fur Angewante Physik der Johann-Wolgang-Goethe-Univ, Germany, Frankfurt am Main\nG.H. Gillespie Associates, Inc., USA, CA, Del Mar
Project summaryThe main problem of nuclear energy production is connected with reliable insulation and even extermination of radioactive wastes of high specific activity that is stored due to energy reactor exploitation.
Starting from the 1960s, alternative approaches to both the insulation and extermination of radioactive wastes of reactor-based energy production were discussed. The main idea of these approaches is based on the elemental separation of wastes from the mixture and the subsequent irradiation of long-term components by intensive neutron fluxes. Atomic transformation of nuclei is called transmutation. Single-charged ions of the lightest nuclei, i.e. protons or deuterons, are supposed to be the most convenient for neutron flux generation. Optimal energy of accelerated ions is within the range from 1.0 to 1.5GeV/amu, as minimum energy cost of neutron production is in this range. Ion beam intensity is basically considered in the range from 10 to 30mA, while more intensive beams are also considered for certain applications. A super power CW ion accelerator, used as a driver for the electric nuclear facility, is called a transmuter.
The next (but probably no less important) possible application of superpower linac is the generation of an extra neutron beam in a hybrid scheme of an atomic power station, where the nuclear reactor operates in a sub-critical mode. The main advantage of this scheme is in the highest rate of reliability of its exploitation and, as a result, in the absolute ecological safety of atomic energy production.
The means to create an ecologically safe transmuter is one of purposes of the current project. The study of the physical processes which lead to an increase in beam size, halo formation and, as a result, beam losses in the transmuter accelerator channel, is the main direction of scientific activity in the framework of the project. The following problems are to be considered:
study of halo physics and development of methods of halo minimization;
study of residual gas influence on halo increase;
study of random fluctuation influence on radiation safety of linac;
improving of radiation safety of linac by decreasing accelerator channel sensitivity to random errors;
new approaches and codes for calculation of optimal parameters of accelerating channel with supercomputers and mathematical optimization.
The other direction of project activity will be connected with new, ecologically safe, cycles of nuclear energy production. The development of remote, non-destructive, control for isotopes contained in fissionable materials is to be conducted.
In the creation of new-age reactors on fast neutrons, a certain quantity of initial Pu-239 will be kept through fuel reproduction, as a result of the U-Pu cycle. Thus, there is a need for operative non-destructive control of the isotopic content of irradiated heat producing elements (HPEs). The HPEs of control will be removed from working reactors and then analyzed in a special box, with nanosecond neutron pulses. These pulses are produced by the interaction reaction between fast deuterons, accelerated in compact deuteron linac, and deuteron target, placed at the linac output. Nuclear measurements will be performed with a special installation, using pulse fast neutron analysis (PFNA). By analyzing the measured neutron and gamma-spectra, the content of fissionable elements, primarily Pu-239, will be defined.
The method of non-destructive control of irradiated HPEs, together with the main aspects of the physical and technological basis of accelerator and measuring complex creation will be developed during work on the project. The complex will include a 0.6-MeV deuteron linac with 50ns pulses and a repetition rate of 200pps, a neutron producing target and complex installation for nuclear measurements.
The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.
ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.