Pool Test Reactor (PTR) was a 10 kWt ordinary (light)

water Water is an inorganic compound with the chemical formula . It is a transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance. It is the main constituent of Earth's hydrosphere and the fluids of all known liv ...

moderated pool-type reactor fueled with

highly enriched uranium Enriched uranium is a type of uranium in which the percent composition of uranium-235 (written 235U) has been increased through the process of isotope separation. Naturally occurring uranium is composed of three major isotopes: uranium-238 (238 ...

built at

Chalk River Chalk River (2016 population: 1029) is a community located within the town of Laurentian Hills in Renfrew County, Ontario, Canada. It is located in the Upper Ottawa Valley along Highway 17 (Ontario), Highway 17 (Trans-Canada Highway), inland ...

in 1957. It used 93% enriched uranium-aluminum plate-type fuel. The reactor, was used for burnup measurement of

fissile In nuclear engineering, fissile material is material that can undergo nuclear fission when struck by a neutron of low energy. A self-sustaining thermal Nuclear chain reaction#Fission chain reaction, chain reaction can only be achieved with fissil ...

samples from NRX. The reactor was designed and built by

Canadair Canadair Ltd. was a Canadian civil and military aircraft manufacturer that operated from 1944 to 1986. In 1986, its assets were acquired by Bombardier Aerospace, the aviation division of Canadian transport conglomerate Bombardier Inc. Canadai ...

History

On November 29, 1957 the reactor attained first criticality and shortly took over the function of

ZEEP The ZEEP (Zero Energy Experimental Pile) reactor was a nuclear reactor built at the Chalk River Laboratories near Chalk River, Ontario, Canada (which superseded the Montreal Laboratory for nuclear research in Canada). ZEEP first went critical a ...

for measuring reactivity effects of materials, particularly after

irradiation Irradiation is the process by which an object is exposed to radiation. An irradiator is a device used to expose an object to radiation, most often gamma radiation, for a variety of purposes. Irradiators may be used for sterilizing medical and p ...

. It was shut down and defueled in 1990.

External links

Atomic Energy of Canada Limited
{{authority control Atomic Energy of Canada Limited Nuclear research reactors