V. D. Rusov, V. A. Tarasov, I. V. Sharf, V. M. Vaschenko, E. P. Linnik, T. N. Zelentsova, M. E. Beglaryan, S. A. Chernegenko, S. I. Kosenko, P. A. Molchinikolov, V. P. Smolyar, E. V. Grechan
On the basis of conditions for existence of nuclear burning wave in neutron-multiplicating media (U-Pu and Th-U cycles) we show the possibility of surmounting so-called dpa-parameter problem, or in other words, an algorithm of optimal nuclear burning wave mode is proposed yielding parameters of the wave (fluence/neutron flux, width and speed of nuclear burning wave) satisfying the dpa-condition, characterizing the tolerable level of radioactive stability of reactor materials, in particular the cladding materials. It is shown for the first time that capture and fission cross-sections of 238U and 239Pu increase with temperature within 1000-3000K range, that under certain conditions may lead to global loss of stability of nuclear burning wave. Some variants of possible stability loss due to so-called blow-up modes, or in other words, anomalous nuclear fuel temperature and neutron flow evolution are discussed and are found to possibly become a reason for trivial violation of internal safety of traveling wave reactor.
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http://arxiv.org/abs/1207.3695
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