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Impact of Control R...
Impact of Control Rod Position and Homogenization on Sodium Void Effect in CFV-type SFR
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- Andersson, Mikael, 1986 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Blanchet, David (författare)
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- Nylén, Henrik, 1967 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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Jacqmin, Robert (författare)
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visa färre...
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(creator_code:org_t)
- ISBN 9781510825734
- 2016
- 2016
- Engelska.
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Ingår i: PHYSOR 2016. - 9781510825734 ; 4, s. 2658-2667
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- In complex innovative fast reactor concepts, fairly detailed core modeling is essential for reliable safety analysis during severe accident scenarios. The CFV core with its axially heterogeneous design, has a negative sodium void reactivity effect, a favorable feature wich increases the inherent system safety in case of sodium boiling. In this work, we studied the impact that the control rod homogenization model used, and the control rod position, have on the sodium void-reactivityeffect and the control rod worth, in the case of a voided CFV core. Three different control rodhomogenization models were studied, the traditional 2D equivalence procedure, and two models based on a 3D equivalence procedure, taking into account the axial heterogeneity of the CFV core.It was found that the impact of control rod homogenization has a negligible effect on the sodium void reactivity effect. However, between different control rod positions, a difference of up to 1$ in the sodium void reactivity effect was found, hence the control rod position has to be carefully considered when calculating the sodium void reactivity effect. For the control rod worth in a voidedCFV core, the traditional 2D procedure, could lead to discrepancies of up to 11% for control rod positions at the top of the core. These discrepancies could be much reduced by control rod homogenization with the 3D equivalence procedure. For the total control rod worth, all models andprocedures produced results within the desired error margin of 5%.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies (hsv//eng)
Nyckelord
- void
- Monte Carlo
- homogenization
- fast reactor
- Control rod
Publikations- och innehållstyp
- kon (ämneskategori)
- ref (ämneskategori)
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