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anti-réactivité neutronique

English translation: negative reactivity

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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
French term or phrase:anti-réactivité neutronique
English translation:negative reactivity
Entered by: petergole
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15:07 Feb 20, 2009
French to English translations [PRO]
Tech/Engineering - Nuclear Eng/Sci / nuclear power generation
French term or phrase: anti-réactivité neutronique
s'exprime en pcm (parties par centaine de milliers), concerne les réacteurs nucléaires EPR ou EBR.
Pour compenser l'activité neutronique ou des neutrons dans la réaction de fission au sein d'un réacteur nucléaire, on entoure les barres d'uranium d'une gaine contenant un élément absorbant les neutrons, appelé poison neutronique. L'efficacité de ce poison est appelée l'anti-réactivité neutronique.
proposition : neutron anti-reactivity or simply anti-reactivity
petergole
France
Local time: 20:47
negative reactivity
Explanation:
See:

http://en.wikipedia.org/wiki/Nuclear_poison

During operation of a reactor the amount of fuel contained in the core constantly decreases. If the reactor is to operate for a long period of time, fuel in excess of that needed for exact criticality must be added when the reactor is built. The positive reactivity due to the excess fuel must be balanced with negative reactivity from neutron-absorbing material. Movable control rods containing neutron-absorbing material is one method, but control rods alone to balance the excess reactivity may be impractical for a particular core design as there may be insufficient room for the rods or their mechanisms.
Selected response from:

Claire Cox
United Kingdom
Local time: 19:47
Grading comment
Thank you. I agree with "negative reactivity". The only question in the text I am working on is there are two terms "anti-réactivité neutronique" and "anti-réactivité" (without neutronique). I guess they both mean "negative reactivity".
4 KudoZ points were awarded for this answer

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Summary of answers provided
4 +3negative reactivity
Claire Cox


  

Answers


14 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +3
negative reactivity


Explanation:
See:

http://en.wikipedia.org/wiki/Nuclear_poison

During operation of a reactor the amount of fuel contained in the core constantly decreases. If the reactor is to operate for a long period of time, fuel in excess of that needed for exact criticality must be added when the reactor is built. The positive reactivity due to the excess fuel must be balanced with negative reactivity from neutron-absorbing material. Movable control rods containing neutron-absorbing material is one method, but control rods alone to balance the excess reactivity may be impractical for a particular core design as there may be insufficient room for the rods or their mechanisms.

Claire Cox
United Kingdom
Local time: 19:47
Specializes in field
Native speaker of: English
PRO pts in category: 135
Grading comment
Thank you. I agree with "negative reactivity". The only question in the text I am working on is there are two terms "anti-réactivité neutronique" and "anti-réactivité" (without neutronique). I guess they both mean "negative reactivity".
Notes to answerer
Asker: Thank you. I agree with "negative reactivity". The only question in the text I am working on is there are two terms "anti-réactivité neutronique" and "anti-réactivité" (without neutronique). I guess they both mean "negative reactivity".


Peer comments on this answer (and responses from the answerer)
agree  Philippe Etienne
1 hr
  -> Thanks Philippe

agree  SueE
1 hr
  -> Thanks Sue

agree  Michael Watson: agree, plus anti-réactivité neutronique" = "anti-réactivité" as you rightly say
13 days
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Changes made by editors
Feb 20, 2009 - Changes made by M.A.B.:
Field (specific)Energy / Power Generation » Nuclear Eng/Sci


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