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ARTICLE

Development of unfolding method to obtain pin-wise source strength distribution from PWR spent fuel assembly measurement

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Pages 433-441 | Received 29 Oct 2012, Accepted 24 Dec 2012, Published online: 28 Mar 2013

Figures & data

Figure 1 Example of the pins in the first ring

Figure 1 Example of the pins in the first ring

Figure 2 Axial dose rate distributions of C15 assembly

Figure 2 Axial dose rate distributions of C15 assembly

Table 1 Design specification of the ionization chamber

Figure 3 Flowchart of the unfolding procedure

Figure 3 Flowchart of the unfolding procedure

Table 2 Specification of the fuel assembly and detector

Figure 4 Pin-wise configuration of C15 assembly

Figure 4 Pin-wise configuration of C15 assembly

Figure 5 Pin-wise source strength distribution of C15 assembly

Figure 5 Pin-wise source strength distribution of C15 assembly

Table 3 First ring contribution

Table 4 First ring average source strength

Table 5 Fitting parameters used in the unfolding

Figure 6 Convergence rate of the unfolding method

Figure 6 Convergence rate of the unfolding method

Figure 7 Difference between the relative distribution from unfolding and design code

Figure 7 Difference between the relative distribution from unfolding and design code

Table 6 Reproduction of dose rates from the unfolding and design code solution

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