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A closer look at NRC’s proposed rule eliminating ALARA
On July 1, the Nuclear Regulatory Commission proposed removing the “as low as reasonably achievable” (ALARA) principle from its radiation protection regulations and replacing it with a graded approach. The agency also proposed increases to effluent dose limits and adjusting how it handles allowances for exceeding dose limits.
Y. Tatematsu et al.
Fusion Science and Technology | Volume 47 | Number 1 | January 2005 | Pages 257-259
Technical Paper | Open Magnetic Systems for Plasma Confinement | doi.org/10.13182/FST05-A656
Articles are hosted by Taylor and Francis Online.
As an improvement of the central-cell ECRH (C-ECRH) system in GAMMA 10, an ellipsoidal mirror was installed instead of a cylindrical mirror. With this replacement, the microwave beam for ECRH is converged to the GAMMA 10 axis on the resonance surface and Poynting flux reaching the plasma core region becomes about five times larger than the previous one. Effectiveness of this system has been shown in the initial stage of experiment. Finite increment of soft X-ray signal during ECRH operation indicates an increase of the electron temperature. As more improvement, designing a new antenna is now under way.
