Editing Breeder reactor (section)

====Other fast reactors====
[[File:MSRE Core.JPG|right|thumb|The graphite core of the [[Molten Salt Reactor Experiment]]]]

The first fast reactor built and operated was the Los Alamos Plutonium Fast Reactor ("[[Clementine (nuclear reactor)|Clementine]]") in Los Alamos, NM.<ref name=":1">{{Cite journal |last1=Patenaude |first1=Hannah K. |last2=Freibert |first2=Franz J. |date=2023-07-03 |title=Oh, My Darling Clementine: A Detailed History and Data Repository of the Los Alamos Plutonium Fast Reactor |journal=Nuclear Technology |language=en |volume=209 |issue=7 |pages=963–1007 |doi=10.1080/00295450.2023.2176686 |issn=0029-5450|doi-access=free |bibcode=2023NucTe.209..963P }}</ref> Clementine was fueled by Ga-stabilized delta-phase Pu and cooled with mercury. It contained a 'window' of Th-232 in anticipation of breeding experiments, but no reports were made available regarding this feature.

Another proposed fast reactor is a fast [[molten salt reactor]], in which the molten salt's moderating properties are insignificant. This is typically achieved by replacing the light metal fluorides (e.g. LiF, {{chem2|BeF2}}) in the salt carrier with heavier metal chlorides (e.g., KCl, RbCl, {{chem2|ZrCl4}}).

Several prototype FBRs have been built, ranging in electrical output from a few light bulbs' equivalent ([[Experimental Breeder Reactor I|EBR-I]], 1951) to over 1,000&nbsp;[[MWe]]. As of 2006, the technology is not economically competitive to thermal reactor technology, but [[nuclear power in India|India]], Japan, China, South Korea, and Russia are all committing substantial research funds to further development of fast breeder reactors, anticipating that rising uranium prices will change this in the long term. Germany, in contrast, abandoned the technology due to safety concerns. The [[SNR-300]] fast breeder reactor was finished after 19 years despite cost overruns summing up to a total of {{Euro}}3.6&nbsp;billion, only to then be abandoned.<ref>Werner Meyer-Larsen: ''Der Koloß von Kalkar''. [[Der Spiegel]] 43/1981 vom 19 October 1981, S. 42–55. [[{{citation |title=Der Koloß von Kalkar |work=[[Der Spiegel]] |series=13 September}}]] (German)</ref>