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


ISBN Онлайн: 978-1-56700-478-6

VARIATION OF TOTAL EMISSIVITY OF FUEL PIN OF IPHWR WITH TEMPERATURE

DOI: 10.1615/IHMTC-2017.2700
pages 1929-1934

Ketan Ajay
Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee

Mukesh Sharma
Indian Institute of Technology Roorkee, Uttarakhand

Ravi Kumar
Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India

Deb Mukhopadhyay
Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India

Prasanna Majumdar
Reactor safety division, Bhabha Atomic Research Centre, Mumbai

Akhilesh Gupta
Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India

Аннотация

In Nuclear reactor heat is generated internally due to fission chain reaction. Coolant system is used to take away this heat in order to produce useful electrical power. Under conditions of large break loss of coolant accident (LOCA) coincident with the failure of emergency core cooling system (ECCS) coolant channel would be voided leading to rapid temperature rise of fuel pins and pressure tube. At high temperature, radiation mode of heat transfer becomes very predominant in the coolant channel and heat is dissipated to the moderator through calandria tube (CT). Emissivity of fuel clad which is made of Zircaloy-4, is an important parameter for estimating the radiation heat transfer between fuel bundle and pressure tube (PT). Experiments have been conducted to evaluate the variation of total emissivity of pre-oxidized clad (autoclaved) fuel pin of 220MWe Indian pressurized heavy water reactor (IPHWR) with temperature under inert atmosphere. From experimental analysis it has been found that the emissivity of the fuel pin decreases with corresponding rise in temperature.