Xenon Dynamics in AHWR-LEU with Coolant Density and Fuel Temperature Feedback
The static core calculations assume average neutron flux; as a result, the xenon concentration, coolant density, and fuel temperature are also assumed to have core average values. In order to study xenon dynamics for different perturbation (like refueling of channels and withdrawal of regulating rods), explicit xenon calculations with coolant density and Doppler feedback were carried out for AHWR-LEU core. The calculations were carried out at small time steps (say 0.1 h intervals). Time-dependent quarter core power distribution was studied for different reactivity perturbation.
KeywordsAHWR-LEU Xenon dynamics Coolant density feedback Doppler feedback
We are thankful to Sh. A. S. Pradhan, Head Reactor Physics and Shielding Section, RSA Group, NPCIL for providing the complete technical support, infrastructures, and guidance. We are highly thankful to Smt. S. Ray and Dr. S. Mishra for having a variety of many fruitful technical discussions. The authors of the report are also thankful to D. Chandrakar and Arnab Dasgupta, RED, BARC for providing channel power to coolant density correlation table and channel power to fuel temperature correlation table.
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