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HEAVY-WATER MODERATOR [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 - external organization data 2023-03-21

English

Subject field(s)
  • Nuclear Fission Reactors
  • Compartment - Canadian Nuclear Safety Commission
DEF

A Canadian-invented pressurized heavy-water reactor that uses heavy water(deuterium oxide) for moderator and coolant and natural uranium for fuel.

OBS

CANDU®: registered trademark.

French

Domaine(s)
  • Réacteurs nucléaires de fission
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

Réacteur à eau lourde pressurisée conçu au Canada dans lequel l'oxyde de deutérium (eau lourde) joue le rôle de modérateur et de fluide de refroidissement et l'uranium naturel sert de combustible.

OBS

CANDU® : marque de commerce déposée.

Spanish

Save record 1

Record 2 2016-11-23

English

Subject field(s)
  • Nuclear Fission Reactors
CONT

Nuclear Power Demonstration reactor. This was the prototype CANDU reactor, and the first power reactor in Canada. It was located upstream of AECL' s Chalk River laboratories, along the Ottawa River's south shore(i. e. in Ontario). The reactor had a maximum continuous output of 22 MWe gross(19. 5 MWe net)... The reactor was built as a joint AECL/Ontario Hydro/Canadian General Electric project, and was initially intended to use a vertically-fuelled pressure vessel reactor. The design was changed in 1957 to natural uranium fuel bundles in horizontal pressure tubes in unpressurized heavy water moderator, with on-line refuelling. These are hallmarks of the CANDU reactor. The reactor had 132 fuel channels(each fuel channel comprised a pressure tube inside a calandria tube) and the coolant leaving the channels was 7. 2 MPa and 277°C. The main reactivity control was by adjusting the heavy-water moderator level, which could be rapidly dumped for fast shut down. NPD was finally shut down on May 5 1987, for economic reasons...

French

Domaine(s)
  • Réacteurs nucléaires de fission
OBS

réacteur nucléaire de démonstration : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.

Spanish

Save record 2

Record 3 2008-11-07

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Nuclear Power Stations
  • Nuclear Fission Reactors
OBS

The cylindrical tank containing the pressure tubes and moderator, called the "calandria", sits on its side. Thus, the CANDU core is horizontal. A fuelling machine visits each end of the core, one fuelling and the other de-fuelling, allowing operators to insert fresh fuel at alternate ends for neighbouring fuel channels.

Key term(s)
  • heavy water moderator

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Centrales nucléaires
  • Réacteurs nucléaires de fission

Spanish

Save record 3

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