TERMIUM Plus®

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DOUBLE PACKED VALVE STEM [1 record]

Record 1 - external organization data 2006-01-24

English

Subject field(s)
  • Closing Devices and Nozzles (Mechanical Components)
  • Nuclear Fission Reactors
  • Compartment - Canadian Nuclear Safety Commission
CONT

There are two types of D2O liquid collection system. The open method uses drip trays under potential leak points such as flanged joints (used rarely). The closed system conveys leakage directly to collection tanks without it coming in contact with the atmosphere to prevent downgrading from moisture in the air. This type of leakage generally occurs from double-packed valve stems or bellows-sealed valves.

Key term(s)
  • double packed valve stem

French

Domaine(s)
  • Obturateurs et buses (Composants mécaniques)
  • Réacteurs nucléaires de fission
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Il existe deux types de systèmes de collecte d'eau lourde liquide. Rarement utilisé, le système ouvert repose sur l'utilisation de plateaux d'égouttage sous des points de fuite possibles, comme les raccords à bride. Le système fermé, quant à lui, dirige les fuites de D2O directement à des citernes sans que le liquide n'entre en contact avec l'air afin d'éviter la contamination par l'humidité atmosphérique. Les fuites de ce type proviennent généralement des tiges de manoeuvre des vannes à double garniture et des vannes à soufflets.

Spanish

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