Simulation of hydrogen distribution in an Indian Nuclear Reactor Containment

Prabhudharwadkar, Deoras; Iyer, Kannan N.; Mohan, Nalini; Bajaj, S.S.; Markandeya, S. G.

doi:10.1016/j.nucengdes.2010.11.012

Cited by 50 publications

(13 citation statements)

References 19 publications

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“…The capability of CFD codes to evaluate the hydrogen distribution is intensively assessed (OECD/NEA, 1999. But considering the large volume of a typical reactor containment (60,000-70,000 m 3 ), the difficulty of simulating the wall condensation and that at least three species (air, H 2 , and steam) are involved, the simulations of large scale facilities with commercial CFD codes is a very challenging task (Martin-Valdepeñas et al, 2007;Bawens and Dorofeev, 2014;Prabhudharwadkar et al, 2011) even though there some past successful studies.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a gas stratification break-up by a vertical jet using the GOTHIC code

Fernández-Cosials

Varas

López-Alonso

2016

Nuclear Engineering and Design

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Section: Introductionmentioning

confidence: 99%

Analysis of a gas stratification break-up by a vertical jet using the GOTHIC code

Fernández-Cosials

Varas

López-Alonso

2016

Nuclear Engineering and Design

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“…Therefore many researchers have been using CFD methods for studies on hydrogen distribution in nuclear reactor containments (Manninen et al, 2002;Prabhudharwadkar et al, 2011;Visser et al, 2012). However, these CFD codes require very fine grid resolution to resolve thin substructures, such as jets and wall boundaries.…”

Section: Introductionmentioning

confidence: 99%

Validation of hydrogen gas stratification and mixing models

Zhao

2015

Annals of Nuclear Energy

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a b s t r a c tTwo validation benchmarks confirm that the BMIX++ code is capable of simulating unintended hydrogen release scenarios efficiently. The BMIX++ (UC Berkeley mechanistic MIXing code in C++) code has been developed to accurately and efficiently predict the fluid mixture distribution and heat transfer in large stratified enclosures for accident analyses and design optimizations. The BMIX++ code uses a scaling based one-dimensional method to achieve large reduction in computational effort compared to a 3-D computational fluid dynamics (CFD) simulation. Two BMIX++ benchmark models have been developed. One is for a single buoyant jet in an open space and another is for a large sealed enclosure with both a jet source and a vent near the floor. Both of them have been validated by comparisons with experimental data. Excellent agreements are observed. The entrainment coefficients of 0.09 and 0.08 are found to fit the experimental data for hydrogen leaks with the Froude number of 99 and 268 best, respectively. In addition, the BIX++ simulation results of the average helium concentration for a enclosure with a vent and a single jet agree with the experimental data within a margin of about 10% for jet flow rates ranging from 1.21 Â 10 À4 to 3.29 Â 10 À4 m 3 /s. Computing time for each BMIX++ model with a normal desktop computer is less than 5 min.Published by Elsevier Ltd.

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“…Considering the large volume of the reactor containment (60,000e70,000 m 3 ), CFD calculations of all the containment flows are a very challenging task, and few demonstrative calculations (Heitsch et al 2010;Prabhudharwadkar et al 2011) have thus been done until now on typical accidental sequences. So called LumpedParameter codes, or 0D codes, are used generally to describe the flow in the whole vessel.…”

Section: Introductionmentioning

confidence: 99%