ANALYSIS OF THE IMPACT OF COOLANT DENSITY VARIATIONS IN THE HIGH EFFICIENCY CHANNEL OF A PRESSURE TUBE SUPER CRITICAL WATER REACTOR
The Pressure Tube (PT) Supercritical Water Reactor (SCWR) is based on a light water coolantoperating at pressures above the thermodynamic critical pressure, and a separate low temperatureand low pressure moderator. The separation between the coolant and moderator is facilitated bya High Efficiency Channel consisting of a pressure tube and porous ceramic insulator tube. Atthese conditions the coolant density may change by an order of magnitude depending on thelocal enthalpy of the fluid. This may cause significant changes in the neutron transportcharacteristics, axially and radially, in the fuel channel. In the radial direction neutron transportcalculations must consider thechanges in coolant density within the porous insulator region ofthe High Efficiency Channel. This insulator region has a very large temperature gradient,ranging from a maximum 881 K at the liner tube to a minimum 478 K at the pressure tube wall.This work performs lattice physics calculations for a 78-element Pu-Th fuel at zero and exitburnup and examines the effect of assumptions related to coolant density in the radial directionof a HEC. This paper uses the neutron transport code WIMS-AECL, with varying water densityprofiles in the insulator region as well as in the coolant sub-channelsalong the channel.
M.G.Scriven D.W.Hummel D.R.Novog J.C.Luxat
McMaster University,Hamilton,Ontario,Canada
国际会议
3rd China-Canada Joint Workshop on Supercritical Water-Cooled Reactors(第三届中国-加拿大超临界水堆研讨会 (CCSC-2012)
西安
英文
1-12
2012-04-18（万方平台首次上网日期，不代表论文的发表时间）