Doubling time for Breeder Reactor.

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Discussion Overview

The discussion centers on the concept of doubling time for breeder reactors, exploring its relationship with factors such as power, original fissile load, and breeding ratio (BR). Participants seek to understand the theoretical and practical implications of these relationships, as well as resources for further reading.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Homework-related

Main Points Raised

  • One participant inquires about the doubling time for breeder reactors and its relation to power, original fissile load, and breeding ratio.
  • Another participant calculates that with a breeding ratio of 1.2, it would take approximately 4 cycles to double the feed, asserting that the breeding ratio is not related to the reactor's power but rather its nuclear design characteristics.
  • A subsequent post reiterates the previous calculation regarding the breeding ratio and asks if there is a formula for doubling time in terms of the breeding ratio.
  • Another participant suggests a book on fast breeder reactors and notes that the doubling time depends on various factors, including fuel form, power density, and batch size, mentioning a simple equation that involves a variable dependent on these factors.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between breeding ratio and reactor power, with some asserting independence while others seek clarification on formulas and dependencies. The discussion remains unresolved regarding the exact expression for doubling time.

Contextual Notes

Limitations include the dependence of doubling time on multiple variables that are not fully defined or agreed upon, as well as the lack of a clear formula for calculating doubling time in terms of breeding ratio.

Who May Find This Useful

This discussion may be useful for students and professionals interested in nuclear engineering, particularly those focusing on breeder reactor design and operation.

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What is the doubling time for breeder reactor, and how its related to the , Power , Original Fissile load ,and The breeding ration "BR" ?
..
if there is any online sources or recommended books about the subject for further reading.
Thanks.
 
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If the breeding ratio is 1.2 then it would take approximately 4 cycles to end up with double the feed (1.2^4 = 2.07). The breeding ratio is not related to the power of the reactor, only its nuclear design characteristics.
 
QuantumPion said:
If the breeding ratio is 1.2 then it would take approximately 4 cycles to end up with double the feed (1.2^4 = 2.07). The breeding ratio is not related to the power of the reactor, only its nuclear design characteristics.
..
Is there an expression (formula) of the doubling time in terms of the breeding ratio ?
 
Find a copy of Fast breeder reactors By Alan Edward Waltar, Albert Barnett Reynolds

otherwise see here -
http://books.google.com/books?id=4m...epage&q=Doubling time, breeding ratio&f=false

See Chapter 7, Sections 7-8.

The doubling time depends on a number of factors, such as the fuel form (oxide, carbide, metal), power density, batch size, . . . .

There are some simple equations, e.g., dM/dt = λM, but the λ is a function of the aforementioned variables.
 

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