FUEL ASSEMBLY

FUEL ASSEMBLY

PURPOSE:To avoid local output increase and ensure a thermal margin without any increase of a ratio of natural uranium in MOX fuel by designing it so that the outer diameter of an MOX fuel pellet may be smaller than that of a normal uranium fuel pellet in regard to plutonium thermal utilization. CONS...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: AOYAMA TADAO, MORIWAKI MASANAO
Format: Patent
Sprache:eng
Schlagworte:
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Beschreibung
Zusammenfassung:PURPOSE:To avoid local output increase and ensure a thermal margin without any increase of a ratio of natural uranium in MOX fuel by designing it so that the outer diameter of an MOX fuel pellet may be smaller than that of a normal uranium fuel pellet in regard to plutonium thermal utilization. CONSTITUTION:After the outer diameter of an MOX fuel rod 2 is 70% smaller than that of an uranium fuel rod 3 and an output share of both is approximately equal to another, the MOX fuel rods are arranged in the form of a lattice. The output thereof is constrained and a thermal margin can be ensured by making the outer diameter of the MOX fuel rod slender.