The potential for sodium release to reactor containment building from reactor assembly during Core Disruptive Accident (CDA) in Fast Breeder Reactors (FBR) is an important safety issue with reference to the structural integrity of Reactor Containment Building (RCB). For Prototype Fast Breeder Reactor (PFBR), the estimated sodium release under a CDA of 100 MJ energy release is 350 kg. The ejected sodium reacts easily with air in RCB and causes temperature and pressure rise in the RCB. For estimating the severe thermal consequences in RCB, different modes of sodium fires like pool and spray fires were analyzed by using SOFIRE–II and NACOM sodium fire computer codes. Effects of important parameters like amount of sodium, area of pool, containment air volume and oxygen concentration have been investigated. A peak pressure rise of 7.32 kPa is predicted by SOFIRE II code for 350 kg sodium pool fire in 86,000 m3 RCB volume. Under sodium release as spray followed by unburnt sodium as pool fire mode analysis, the estimated pressure rise is 5.85 kPa in the RCB. In the mode of instantaneous combustion of sodium, the estimated peak pressure rise is 13 kPa.
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14th International Conference on Nuclear Engineering
July 17–20, 2006
Miami, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4246-0
PROCEEDINGS PAPER
Analysis of Sodium Fire in the Containment Building of Prototype Fast Breeder Reactor Under the Scenario of Core Disruptive Accident
P. M. Rao,
P. M. Rao
Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India
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N. Kasinathan,
N. Kasinathan
Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India
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S. E. Kannan
S. E. Kannan
Safety Research Institute, Kalpakkam, TN, India
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P. M. Rao
Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India
N. Kasinathan
Indira Gandhi Centre for Atomic Research, Kalpakkam, TN, India
S. E. Kannan
Safety Research Institute, Kalpakkam, TN, India
Paper No:
ICONE14-89566, pp. 287-291; 5 pages
Published Online:
September 17, 2008
Citation
Rao, PM, Kasinathan, N, & Kannan, SE. "Analysis of Sodium Fire in the Containment Building of Prototype Fast Breeder Reactor Under the Scenario of Core Disruptive Accident." Proceedings of the 14th International Conference on Nuclear Engineering. Volume 5: Safety and Security; Low Level Waste Management, Decontamination and Decommissioning; Nuclear Industry Forum. Miami, Florida, USA. July 17–20, 2006. pp. 287-291. ASME. https://doi.org/10.1115/ICONE14-89566
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