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Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017)

ISSN: 2688-7231 (Online)

NUMERICAL AND EXPERIMENTAL INVESTIGATION OF PASSIVE HEAT REMOVAL FROM POROUS BED IN PATH FACILITY

Anil Kumar Sharma
Fast reactor technology Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam, Tamilnadu, India

Venkateswarlu S
Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India

E Hemanth Rao
Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India

B Malarvizhi
EAS/SED, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India

S S Murthy
EAS/SED, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India

Lydia G
Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India

S K Das
Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India

D Ponraju
Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India

B. K. Nashine
Computational Simulation Section, Safety Engineering Division Fast Reactor Technology Group Indira Gandhi Centre for Atomic Research, Kalpakkam − 603102, India

P. Selvaraj
Computational Simulation Section, Safety Engineering Division Fast Reactor Technology Group Indira Gandhi Centre for Atomic Research, Kalpakkam − 603102, India

DOI: 10.1615/IHMTC-2017.30
pages 11-16

Аннотация

In case of a hypothetical core disruptive accident in a Fast Breeder Reactor (FBR) heat removal from core debris is essential to avoid breach of main vessel. Towards achieving this objective, natural convection heat transfer experiments along with numerical simulations are carried out to assess debris bed coolability settled on the in-vessel core catcher. The numerical investigation with debris bed using effective thermal conductivity model as well as porous media heat transfer from debris in PATH facility is carried out. This study is helpful to understand the influence of different boundary conditions and effect of internal components on passive heat transfer from the core debris. The numerical results obtained are validated against in- house experimental data of 1:4 scale model of PFBR i.e. PATH experimental facility. The study confirmed the convective flow through the porous debris bed and better coolabilty of debris as compared to effective thermal conductivity model. However, a significant higher fluid temperature in chimney location is observed. This also suggested increasing in existing chimney height to ease the flow of fluid through passage from bottom of core catcher.

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