ThO2–UO2 YAKIT KARIŞIMINI İÇEREN CANDU YAKIT ÇUBUKLARINDAKİ SICAKLIK DAĞILIMININ SAYISAL ÇÖZÜMLENMESİ

Yıl 2005, Cilt: 20 Sayı: 3, 0 - , 10.04.2013

H. Mehmet Şahin Eşref Baysal Adem Acır

Öz

Bu çalışmada; CANDU yakıt çubuklarındaki sıcaklık dağılımları sonlu farklar metodu kullanılarak incelenmiştir. Temel ısı iletim denklemleri, tanımlanan sınır şartlarıyla birlikte sayısal olarak çözülmüştür. Hesaplamalar sonlu farklar metoduna dayalı HEATING 7.2 bilgisayar kod sistemi kullanılarak yapılmıştır. Elde edilen simülasyon sonuçlarına göre, yakıt çubuklarında % 100 UO₂ kullanılması sonucu Model j durumunda yakıtın merkezinde eksenel çizgideki maksimum sıcaklık 1764 °C olarak elde edilirken, UO₂-ThO₂ yakıt karışımında Model k, Model l ve Model m için ThO₂ yakıt oranının artmasıyla yakıt çubuklarının merkezindeki eksenel çizgideki sıcaklık değerlerinin azaldığı görülmüş, sırasıyla 1213 °C, 944 °C ve  840 °C olarak elde edilmiştir. Ayrıca; yakıt çubuklarında oluşan sıcaklık dağılımının, yakıt ve zarf malzemesinin ergime sıcaklıklarından daha düşük olduğu tespit edilmiştir.

Anahtar Kelimeler

CANDU yakıt çubuğu, sonlu farklar metodu, karışık nükleer yakıtlar.

Kaynakça

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