Control rods

The CANDU reactor is a pressurized-heavy water,(PHWR) natural uranium (i.e. unenriched) power reactor designed in the late 1950s and 1960s by a partnership between Atomic Energy of Canada Limited (AECL) and the Hydro-Electric Power Commission of Ontario (now known as Ontario Power Generation), as well as several private industry participants. The acronym "CANDU", a registered trademark of Atomic Energy of Canada Limited, stands for "CANada Deuterium Uranium". This is a reference to its deuterium oxide (heavy water) moderator and its u ...

Including:

• CANDU reactor - Design features
• CANDU reactor - Economic and political concerns
• CANDU reactor - Measures that address concerns
• CANDU reactor - Notes

Read more here: » CANDU reactor: Encyclopedia - CANDU reactor

One economic disadvantage of the CANDU reactor design is the initial, one-time cost of the heavy water, although this high capital-cost penalty is generally offset by the CANDU reactor's lower fuelling cost compared to other designs, since it does not require enriched uranium. CANDU reactors require the purest grade of heavy water (better than 99.75% pure2). Tonnes of this expensive material are required to fill a CANDU's calandria and heat transport system. High-purity heavy water is expensive because heavy water i ...

See also:

CANDU reactor, CANDU reactor - Design features, CANDU reactor - Chronology, CANDU reactor - Active CANDU reactors, CANDU reactor - Economic and political concerns, CANDU reactor - Measures that address concerns, CANDU reactor - Notes

Read more here: » CANDU reactor: Encyclopedia II - CANDU reactor - Economic and political concerns

One economic disadvantage of the CANDU reactor design is the initial, one-time cost of the heavy water, although this high capital-cost penalty is generally offset by the CANDU reactor's lower fuelling cost compared to other designs, since it does not require enriched uranium. CANDU reactors require the purest grade of heavy water (better than 99.75% pure2). Tonnes of this expensive material are required to fill a CANDU's calandria and heat transport system. High-purity heavy water is expensive because heavy water i ...

See also:

CANDU reactor, CANDU reactor - Design features, CANDU reactor - Economic and political concerns, CANDU reactor - Measures that address concerns, CANDU reactor - Notes

Read more here: » CANDU reactor: Encyclopedia II - CANDU reactor - Economic and political concerns

Efficient CANDU installations are careful to control heavy water losses from the calandria, and also actively separate tritium from the moderator to sell in the secondary medical market. Some large CANDU installations use surplus power to operate their own small deuterium separation plants, to upgrade the heavy water inventory and reduce costs. The large thermal mass of the cool calandria acts as a substantial safety mechanism. If a fuel assembly were to overheat and melt, it would be cooled in the very process of changing the reactor ...

See also:

CANDU reactor, CANDU reactor - Design features, CANDU reactor - Chronology, CANDU reactor - Active CANDU reactors, CANDU reactor - Economic and political concerns, CANDU reactor - Measures that address concerns, CANDU reactor - Notes

Read more here: » CANDU reactor: Encyclopedia II - CANDU reactor - Measures that address concerns

The first CANDU-type reactor was the Nuclear Power Demonstrator (NPD), in Rolphton, Ontario. It was intented as a proof-of-concept design, and was rated for only 22MWe, a very low power for a commercial power reactor. It produced the first nuclear-generated electricity in Canada, and ran successfully from 1962 to 1987.[1], [2] The second CANDU was the Douglas Point reactor, a more powerful version rated at roughly 200MWe and located near Kincardine, Ontario. Somewhat contraversially, the Douglas Point project was started in 1959, even ...

See also:

CANDU reactor, CANDU reactor - Design features, CANDU reactor - Chronology, CANDU reactor - Active CANDU reactors, CANDU reactor - Economic and political concerns, CANDU reactor - Measures that address concerns, CANDU reactor - Notes

Read more here: » CANDU reactor: Encyclopedia II - CANDU reactor - Chronology

Efficient CANDU installations are careful to control heavy water losses from the calandria, and also actively separate tritium from the moderator to sell in the secondary medical market. Some large CANDU installations use surplus power to operate their own small deuterium separation plants, to upgrade the heavy water inventory and reduce costs. The large thermal mass of the cool calandria acts as a substantial safety mechanism. If a fuel assembly were to overheat and melt, it would be cooled in the very process of changing the reactor ...

See also:

CANDU reactor, CANDU reactor - Design features, CANDU reactor - Economic and political concerns, CANDU reactor - Measures that address concerns, CANDU reactor - Notes

Read more here: » CANDU reactor: Encyclopedia II - CANDU reactor - Measures that address concerns