Abstract
The dependence of the change of reactivity on energy production is obtained from an analysis of IBR-2 operation during the period 1982–2006. It is shown that at the start of reactor operation, aside from the pure effect of burnup, additional positive effects which are most likely associated with fuel densification and structural change of the core material operate. These effects decrease with time and go to zero. After 40000 MW·h only the effect of pure burnup remains, and from this moment the reactivity decreases linearly with coefficient kb = −4.3·10−5%/(MW·h). A formula is obtained for calculating the coefficient of energy release at any moment of operation of the reactor.
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Translated from Atomnaya Énergiya, No. 104, No. 3, pp. 147–152, March, 2008.
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Chan, L.Y., Pepelyshev, Y.N. & Rogov, A.D. Fuel burnup related change of the reactivity effect in IBR-2 from 1982 to 2006. At Energy 104, 192–197 (2008). https://doi.org/10.1007/s10512-008-9015-z
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DOI: https://doi.org/10.1007/s10512-008-9015-z