| 摘要 |
<p>Disclosed are a fuel rod (300, 400) and a fuel bundle using the fuel rod (300, 400). The fuel rod (300, 400) may include first enriched uranium in a boost zone (310, 410) of the fuel rod (300, 400), wherein the boost zone (310, 410) may be arranged directly at a bottom of the fuel rod (300, 400). The fuel rod (300, 400) may also include second enriched uranium in a second zone (320, 420) of the fuel rod (300, 400), wherein the second zone (320, 420) is arranged over the boost zone (310, 410). The fuel rod (300, 400) may also include natural uranium in a third zone (330, 430) of the fuel rod, wherein the third zone (330, 430) is arranged over the second zone (320, 420). In this fuel rod(300, 400), a percent of enrichment of the enriched uranium in the boost zone (310, 410) is at least one percent.
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