CUED Publications database

Ultra-thin<sup>242m</sup>Am fuel elements in nuclear reactors

Ronen, Y and Shwageraus, E (2000) Ultra-thin<sup>242m</sup>Am fuel elements in nuclear reactors. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 455. pp. 442-451. ISSN 0168-9002

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There is a growing interest in using 242m Am as a nuclear fuel. The advantages of 242m Am as a nuclear fuel derive from the fact that 242m Am has the highest thermal fission cross section. The thermal capture cross section is relatively low and the number of neutrons per thermal fission is high. These nuclear properties make it possible to obtain nuclear criticality with ultra-thin fuel elements. The possibility of having ultra-thin fuel elements enables the use of these fission products directly, without the necessity of converting their energy to heat, as is done in conventional reactors. There are three options of using such highly energetic and highly ionized fission products. 1. Using the fission products themselves for ionic propulsion. 2. Using the fission products in an MHD generator, in order to obtain electricity directly. 3. Using the fission products to heat a gas up to a high temperature for propulsion purposes. In this work, we are not dealing with a specific reactor design, but only calculating the minimal fuel elements' thickness and the energy of the fission products emerging from these fuel elements. It was found that it is possible to design a nuclear reactor with a fuel element of less than 1 μm of 242m Am. In such a fuel element, 90% of the fission products' energy can escape.

Item Type: Article
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:21
Last Modified: 22 May 2018 07:46