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Licensed Unlicensed Requires Authentication Published by De Gruyter August 27, 2019

Assessment of the fuel assembly pin-by-pin model in the KORSAR/GP code

Bewertung des Brennelement-Pin-by-Pin-Modells im KORSAR/GP-Code
  • A. I. Sinegribova , M. A. Uvakin and M. A. Bykov
From the journal Kerntechnik


The purpose of this paper is the assessment of the FA pin-by-pin model available in the KORSAR/GP code. The paper presents the results of the simulation of an “Control rod ejection” accident. This accident is of interest due to the power redistribution in the FAs effected by the ejection. The safety margins are calculated with the use of the “hot channel” model for NPP safety analyses. Only the fuel rods of the core with the highest power are taking into account. The absence of the change of the pin power distribution for the FA during the transient is compensated by increased conservatism. In this paper, the maximum fuel rod power was obtained using the pin-by-pin model.


Dieser Beitrag präsentiert eine Bewertung des Brennelement-Pin-by-Pin-Modells des Programms KORSAR/GP anhand einer Berechnung des Szenarios Steuerstabauswurf. Dieses Szenario ist aufgrund der durch den Auswurf verursachten Energieumverteilung in den Brennelementen von Interesse. Die Sicherheitsmargen werden mit Hilfe des „Heißkanal“-Modells für die Sicherheitsanalysen von Kernkraftwerken berechnet. Es werden nur die Brennstäbe des Kerns mit der höchsten Leistung berücksichtigt. Das Fehlen einer Änderung der Pin-Leistungsverteilung für das Brennelement während der Transienten wird durch erhöhten Konservatismus kompensiert. In diesem Beitrag wurde die maximale Brennstableistung mit dem Pin-by-Pin-Modell ermittelt.



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Received: 2019-02-15
Published Online: 2019-08-27
Published in Print: 2019-09-16

© 2019, Carl Hanser Verlag, München

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