Effect of Local Void Fractions on Subcooled Boiling Oscillations in Natural Circulation Boiling Loop

Journal Article · Fri Jul 01 00:00:00 EDT 2016 · Transactions of the American Nuclear Society

OSTI ID:23042938

Karmakar, Arnab ^[1]; Dey, Runa ^[2]; Paruya, Swapan ^[3]

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1. Birla Institute of Technology, Mesra, Jharkhand, India - 835215 (India)
2. Indian School of Mines, Dhanbad, Jharkhand, India - 826004 (India)
3. National Institute of Technology, Durgapur, West Bengal, India -713209 (India)

Passive heat removal using natural circulation boiling loops (NCBLs) is well established from the view point of the safety of boiling water reactors (BWRs). Nevertheless, NCBLs suffer from a large number of nonlinear flow oscillations due to low driving force for circulations. The local measurements of void fraction a are essential to clearly understand the mechanism of flow oscillations. In this work, we have measured the impedance from the needle probe using LCR meter and quantified time-averaged local a from the measured impedance under oscillating flow conditions in the NCBL. Impedance probes have been successfully used in estimating void fractions and bubble frequencies. (authors)

• OSTI ID: 23042938
• Journal Information: Transactions of the American Nuclear Society, Vol. 115; Conference: 2016 ANS Winter Meeting and Nuclear Technology Expo, Las Vegas, NV (United States), 6-10 Nov 2016; Other Information: Country of input: France; 6 refs.; available from American Nuclear Society - ANS, 555 North Kensington Avenue, La Grange Park, IL 60526 (US); ISSN 0003-018X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BUBBLES
BWR TYPE REACTORS
HEAT
IMPEDANCE
LOAD COLLECTOR RATIO
NATURAL CONVECTION
OSCILLATIONS
REACTOR SAFETY
SUBCOOLED BOILING
VOID FRACTION