moderator, coolant
Mostly in Ontario, one in Quebec and one in New Brunswick. They are all CANDU type, ie heavy water moderated and cooled.
Fools gold (iron pyrite) is relatively heavy, it is about one fourth to one third as heavy as gold and about as heavy as iron.
not heavy not medium density
Osmium is one of the heaviest elements known; it is twice as heavy as lead and 22 times as heavy as water
The Dunka Doo toys are heavy after you finished dunking them.
This is the Candu type, which was uniquely developed in Canada to use heavy water moderator and natural uranium fuel
The Candu reactor, which is a heavy water moderated reactor with horizontal pressure tubes enclosing the fuel rods. Something unique to the Canadians, but which has been successful and is installed also in several power stations in Canada, mostly in Ontario.
Different types of nuclear plants: Pressurised Water Reactor (PWR); Boiling Water Reactor (BWR); Heavy Water Moderated Reactor (CANDU); Advanced Gascooled Reactor (AGR); Fast Breeder Reactor (FBR); Pebble Bed Gascooled Reactor; Water Cooled Graphite Reactor (RBMK). There are other ideas that only exist on paper.
One type of nuclear reactor is the pressurized water reactor (PWR). In a PWR, the heat generated by nuclear fission in the reactor core is transferred to water, which circulates through the core to create steam that drives turbines to produce electricity.
The RBMK-1000 reactor primarily produces plutonium-239 as a byproduct of its uranium fuel, along with various isotopes of cesium, strontium, and iodine due to fission processes. In contrast, the CANDU reactor, which uses heavy water as both a moderator and coolant, generates tritium as a significant byproduct, along with isotopes like cesium-137 and strontium-90 from fission. Both reactors contribute to the production of radioactive waste, which requires careful management and disposal.
CANDU Reactors are specifically designed such that they do not require enriched uranium, and can operate entirely on naturally-occurring uranium. A CANDU design is generally used by parties that do not desire uranium enrichment facilities, due to the cost of those facilities. That said, a CANDU reactor CAN use enriched uranium, they are fully capable of supporting that fuel type.
CANDU (Canada Deuterium Uranium) is a type of nuclear reactor designed and developed in Canada. It uses heavy water (deuterium oxide) as a moderator and coolant, allowing it to utilize natural uranium as fuel without the need for enrichment. CANDU reactors are known for their safety features and ability to be refueled while operating, making them efficient and flexible energy sources. They are used primarily in Canada but have also been exported to several other countries.
Presumably you mean nuclear reactor coolant? This is the fluid that transfers the reactor thermal output to the steam raising units in a PWR, or to the turbine in a BWR, in which cases it is natural water. Gas cooled reactors can use carbon dioxide or helium, and CANDU reactors use heavy water.
Pressurised Water Reactor (PWR) US, France, Japan, Russia, China265251.6enriched UO2waterwaterBoiling Water Reactor (BWR) US, Japan, Sweden9486.4enriched UO2waterwaterPressurised Heavy Water Reactor 'CANDU' (PHWR) Canada4424.3natural UO2heavy waterheavy waterGas-cooled Reactor (AGR & Magnox) UK1810.8natural U (metal),enriched UO2CO2graphiteLight Water Graphite Reactor (RBMK) Russia1212.3enriched UO2watergraphiteFast Neutron Reactor (FBR) Japan, France, Russia41.0PuO2 and UO2liquid sodiumnoneOther Russia40.05enriched UO2watergraphite
One type (model) of reactor is the CANDU, or Canada (CAN) dueterium-uranium (DU)reactor. Ther are also differences between fusion and fission reactors, fast and thermal reactors (the differences bing in the speed of the neutrons used to initiate the chain reaction, usually fission), light or heavy water cooled or moderated reactors, and many other distinctions.
The moderator used in the nuclear reactor at Madras Atomic Power Station in Kalpakkam is usually heavy water (deuterium oxide) or light water (ordinary water). These moderators are important for slowing down neutrons produced during nuclear fission reactions to sustain the chain reaction in the reactor.
Many pressurized water reactors use "regular" water (light water) as a primay coolant. That means that "only heavy water" is not a rule as regards reactor design. Reactor design specifies the coolant to be used.