Figure 12 Rod Worth Curves From Example 3

Control Rod Effectiveness - h1019v2_79

Summary - h1019v2_81

Nuclear Physics and Reactor Theory Volume 2 of 2
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CONTROL RODS DOE-HDBK-1019/2-93 Reactor Theory (Nuclear Parameters) Integral rod worth: To plot the integral rod worth, merely develop a cumulative total of the reactivity added after each interval and plot the summed reactivity insertion vs. rod position as shown in Figure 12. Interval Endpoint Summed Reactivity 2 10 4 30 6 70 8 130 10 190 12 230 14 250 16 260 If an integral rod worth curve is supplied, a differential rod worth curve can be generated from Figure 12 Rod Worth Curves From Example 3 the integral rod worth data. Merely select a convenient interval of rod withdrawal, such as 1 inch or 2 inches. Then, determine from the curve the amount of reactivity added for each constant interval of rod withdrawal. A plot of this reactivity addition versus rod withdrawal represents differential rod worth. NP-03 Rev. 0 Page 56

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