Experimental study of PHWR debris bed under boil-off condition

D. Mukhopadhyay, P.K. Vijayan, A.K. Ghosh, P.K. Sahoo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Experiments have been carried out to study the heatup behavior of a submerged debris bed constituted of segmented reactor channels of Pressurized Heavy Water Reactors (PHWR). The study has been done for under fully submerged, partially submerged and nearly exposed conditions. This situation may arise from a severe accident scenario of PHWR where full or segmented reactor channels are likely to be disassembled and form a submerged debris bed. An assembly of electrical heater rod, simulating fuel bundle and channel components like Pressure tube and calandria tube constitute each segmented reactor channels. Ten such reactor channels constitute the debris bed. Heatup of this debris bed is observed with respect to different water levels and at power levels of 10, 20 and 30 kW, typical to decay power levels of 0.25%, 0.5% and 0.75% of reactor full power respectively. It has been observed from the set of experiments that fully submerged debris bed does not get heated up and fuel rod temperature remains at saturation temperature. Heatup is observed for exposed channels only, however the heatup rate is limited with steam and radiative cooling. For exposed debris bed, channels surrounded by neighboring channels get heated up as compared to channels at the periphery of the debris bed. © Carl Hanser Verlag GmbH & Co. KG.
Original languageEnglish
Pages (from-to)34-43
Number of pages10
JournalKerntechnik
Volume79
Issue number1
DOIs
Publication statusPublished - 2014

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heavy water reactors
Heavy water reactors
debris
Debris
beds
reactors
rods
Steam
tubes
Water levels
Accidents
accidents
heaters
Experiments
steam
bundles
Cooling
Temperature
assembly

Cite this

Mukhopadhyay, D. ; Vijayan, P.K. ; Ghosh, A.K. ; Sahoo, P.K. / Experimental study of PHWR debris bed under boil-off condition. In: Kerntechnik. 2014 ; Vol. 79, No. 1. pp. 34-43.
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Experimental study of PHWR debris bed under boil-off condition. / Mukhopadhyay, D.; Vijayan, P.K.; Ghosh, A.K.; Sahoo, P.K.

In: Kerntechnik, Vol. 79, No. 1, 2014, p. 34-43.

Research output: Contribution to journalArticle

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