dc.creator | Maslovarić, Blaženka | |
dc.creator | Stevanović, Vladimir | |
dc.creator | Milivojević, Sanja | |
dc.date.accessioned | 2023-02-23T11:28:00Z | |
dc.date.available | 2023-02-23T11:28:00Z | |
dc.date.issued | 2013 | |
dc.identifier.uri | https://machinery.mas.bg.ac.rs/handle/123456789/4502 | |
dc.description.abstract | A prediction of steam generator behaviour in case of a loss-of-feedwater transient
and a calculation of a time period in which tubes’ dry out will occur, strongly
depends on an initial water mass inventory on the secondary side of the steam
generator and a two-phase mixture swell level. A reliable prediction of the swell
level and water mass inventory is based on appropriate interfacial drag force
correlations or steam-water slip models and a robust numerical method that is able
to predict the swell level movement. A prior assumption of the swell level fixed
position in a thermal-hydraulic simulation of the steam generator secondary side
might lead to erroneous results. In this paper the prediction of the two-phase flow
around tubes in a bundle and the calculation of the steam generator secondary side
thermal-hydraulics is based on the two-fluid model and the Computational Multi
Fluid Dynamics (CMFD) approach. The applied approach solves the vapourliquid
multidimensional two-phase flow and it enables the determination of the
swell level position and corresponding liquid mass inventory. Vapour and liquid
interfacial mass, momentum and energy transfers are modelled with the closure
laws, where some of them are specially developed for the condition of two-phase
flow across tube bundles. The governing equations are solved by the SIMPLE
type pressure-correction method that is derived for the multiphase flow
conditions. The developed model is applied to the prediction of experimental
conditions of refrigerant R113 boiling around tubes in a bundle at the atmospheric
pressure. The numerically calculated swell level and the pressure field in the two
phase mixture are compared with available measured data and a good agreement
is achieved, which also indicates a good prediction of the vapour void fraction and
liquid mass inventory. The developed numerical method and performed
simulations are an improvement regarding previous investigations that were based
on the calculation with the fixed swell level and without the validation of the
water mass inventory on the steam generator secondary side. | sr |
dc.language.iso | en | sr |
dc.publisher | Nuclear Research Group of San Piero a Grado (GRNSPG) of the University of Pisa (UNIPI), the Nuclear and INdustrial Engineering (NINE) and the Thermalhydraulics Division of the American Nuclear Society (ANS) | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/174014/RS// | sr |
dc.rights | restrictedAccess | sr |
dc.source | Proceedings of the 15th International Topical Meeting on Nuclear Reactor Thermal - Hydraulics (NURETH-15), Pisa, Italy, May 12-17, 2013 | sr |
dc.title | PREDICTION OF SWELL LEVEL AND WATER MASS INVENTORY IN STEAM GENERATORS | sr |
dc.type | conferenceObject | sr |
dc.rights.license | ARR | sr |
dc.citation.rank | M33 | |
dc.citation.spage | NURETH15-369 | |
dc.identifier.rcub | https://hdl.handle.net/21.15107/rcub_machinery_4502 | |
dc.type.version | publishedVersion | sr |