Nuclear Reactor Design by Yoshiaki Oka

Author:Yoshiaki Oka
Language: eng
Format: epub
Publisher: Springer Japan, Tokyo

(3.22)

When the operation cycle length is extended by increasing the number of refueling fuel assemblies (n 1 > n 2) without changing the average enrichment (B 0 is constant), the discharge burnup decreases and the fuel economy is compromised as shown in Fig. 3.22. A large B 0 , namely, a high average enrichment is required to prolong the operation cycle length [large B c (n)] by increasing the number of refueling fuel assemblies while maintaining the discharge burnup (B d (n) is constant).

Fig. 3.22Discharge burnup with operation cycle length

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