Investigation of WWER-type and PWR-type model fuel assemblies quenching during loss-of-coolant accident

Author

Bazyuk, S.S.

Author_Institution

FSUE SRI SIA LUCH, Russia

fYear

2013

fDate

6-8 June 2013

Firstpage

1

Lastpage

5

Abstract

The results of reflooding investigations of WWER-type and PWR-type model fuel assemblies (FA) carried out at large-scale facilities (RBHT, SVD, PARAMETER) under Design Basis Accident (DBA) and Beyond Design Accident (BDA) conditions are presented. The regime parameters ranges are: the initial fuel rod temperature - T_clad = 460÷1600 °C, water mass rate - ρw = 47÷160 kg/(m²·s), FA inlet subcooling - ΔT_sub= 11 - 118 °C, pressure - p=0,14÷0,42 MPa and the linear heat flux density simulating decay heat - ql = 0÷2,3 kW/m. The generalizing correlation on the quench front velocity of model FA´s describing the experimental data with 30% error is proposed. It allows to predict the latency of model fuel assemblies reflooding of various design and to evaluate the time of WWER and PWR reflooding.

Keywords

coolants; fuel systems; pressure vessels; BDA; DBA; PARAMETER; PWR-type model; RBHT; SVD; WWER-type model; beyond design accident; decay heat; design basis accident; fuel assembly; large-scale facilities; linear heat flux density; loss-of-coolant accident; reflooding investigations; Assembly; Correlation; Data models; Fuels; Predictive models; Water heating; LOCA accident; NPP safety; ballooning; depressurization; fuel assembly; oxidation; quench front; reflooding;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy (IYCE), 2013 4th International Youth Conference on

Conference_Location

Sio??fok

Type

conf

DOI

10.1109/IYCE.2013.6604164

Filename

6604164