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NRC opens comment period for fusion regulatory changes
The Nuclear Regulatory Commission has taken the next step toward developing fusion regulations, announcing the opening of a 90-day comment period, ending May 27, on a proposed regulatory framework.
In 2023, the NRC commissioners considered three options for the regulatory framework, ultimately selecting to integrate fusion machines into the existing byproduct material approach, which avoids classifying fusion energy systems as utilization facilities. The aim is to implement this approach through changes to 10 CFR Parts 20, 30, 37, 50, 51, 72, 110, 150, 170, and 171.
Ernest E. Hill, Frederick J. Shon
Nuclear Science and Engineering | Volume 11 | Number 2 | October 1961 | Pages 105-110
Technical Paper | doi.org/10.13182/NSE61-A28053
Articles are hosted by Taylor and Francis Online.
This paper presents a fuel cycle program for an intermediate power research reactor utilizing fully enriched MTR type fuel elements. The fuel cycle program is considered at equilibrium after many cycles have past. The program consists of shifting elements from positions of high importance outward to positions of low importance through several paths. The paths are staggered so that only the elements in one path are shifted at the conclusion of a cycle, and only one element is replaced. The method of calculating the fuel remaining in each element is shown utilizing a fractional burn-up factor for each position. Sample calculations are shown for the LPTR with 23 standard elements in the core and a desired burn-up of 15%. A method is proposed to obtain such an equilibrium condition starting with an initial loading of fuel elements having nearly equal fuel loading.