- ZEEP
The ZEEP (Zero Energy Experimental Pile) reactor was a
nuclear reactor built at theChalk River Laboratories nearChalk River ,Ontario ,Canada (which superseded theMontreal Laboratory for nuclear research in Canada). ZEEP first went critical at 3:45 PM,September 5 ,1945 . ZEEP's main international significance is its status as the first operational nuclear reactor outside of theUnited States .The reactor was designed by Canadian, British and French scientists as a part of an effort to produce
plutonium fornuclear weapons duringWorld War II . It was developed while theMontreal Laboratory andChalk River Laboratories research facility were under the supervision of theNational Research Council of Canada (NRC). ZEEP was instrumental in the development of theNRX and NRU reactors, which lead to the development of the highly successfulCANDU reactor. ZEEP was used to test reactivity effects and otherphysics parameters needed for reactor development at Chalk River Laboratories, including fuel lattices for the NRU reactor situated next door.ZEEP was one of the world's first
heavy water reactor s, and it was also designed to use natural (unenriched)uranium ; a feature carried through to the CANDU design.Uranium enrichment is complex and expensive process; thus, the ability to use unenriched uranium gave ZEEP and its descendants a number of distinct advantages.ZEEP was decommissioned in
1973 and dismantled in1997 . In 1966 ZEEP was designated a historic site by Ontario, and commemorated with an historic plaque. Both this plaque and ZEEP itself are now on display at theCanada Science and Technology Museum inOttawa , Canada.ee also
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Science and technology in Canada External links
* [http://www.aecl.ca/ Atomic Energy of Canada Limited]
* [http://www.cns-snc.ca/history/ZEEP/ZEEP_CNSBulletin_Fall1995.html ZEEP: The Little Reactor that Could]
* [http://www.cns-snc.ca/history/ZEEP/ZEEP_AECL1992.pdf AECL Public Affairs brochure on ZEEP]
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