Âderna Fìzika ta Energetika (Sep 2018)

The physics and regularities of the neutron-thermoacoustic instability

  • S. N. Pelykh,
  • Huiyu Zhou,
  • O. B. Maksymova

DOI
https://doi.org/10.15407/jnpae2018.03.244
Journal volume & issue
Vol. 19, no. 3
pp. 244 – 251

Abstract

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The physics and regularities of the neutron-thermoacoustic instability (NTAI) in nuclear channels with subcooled nucleate boiling flows are explained. The method for obtaining the characteristic equation of NTAI in a VVER-type reactor is given. The influence of steam reactivity coefficient ∂k/∂φ on NTAI boundaries is studied and the effect of a negative ∂k/∂φ favouring the oscillatory instability of neutron flux and pressure is shown.

Keywords