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Choi, Sungyeol
Nuclear Fuel Cycle Engineering Lab (NCEL)
Research Interests
  • Fuel Cycle Chemistry; Nuclear Plant Chemistry; Non-aqueous Electrochemistry; Nuclear Security


PASCAR: Long burning small modular reactor based on natural circulation

DC Field Value Language Choi, Sungyeol ko Cho, Jae-Hyun ko Bae, Moo-Hoon ko Lim, Jun ko Puspitarini, Dina ko Jeun, Ji Hoon ko Joo, Han-Gyu ko Hwang, Il Soon ko 2015-09-11T00:01:42Z - 2015-09-09 ko 2011-05 -
dc.identifier.citation NUCLEAR ENGINEERING AND DESIGN, v.241, no.5, pp.1486 - 1499 ko
dc.identifier.issn 0029-5493 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract PASCAR is a 100 MWt/35 MWe lead-bismuth-cooled small modular reactor which requires no on-site refueling and well suits to be used as a distributed power source in either a single unit or a cluster for electricity, heat supply, and desalination. This paper includes both steady-state and transient performance evaluations for neutronics and thermal-hydraulics. Through design optimization studies for minimizing a burn-up reactivity loss, the metallic fuels-loaded core was designed with less than 1$ reactivity swing over 20-year cycle. A radial peaking power location shows the slow inward migration from outer enrichment zones while maintaining peaking factor within 1.35, reducing radiation damage and corrosion duty of high temperature environments. Equipped with coolant flow path large enough to ensure low pressure drop, this reactor is intended to operate by only natural circulation of chemically inert coolant within relatively low temperature range, 320-420 degrees C. Peak outlet temperature is nearly 450 degrees C where an Al-containing duplex cladding has sufficient corrosion resistance. Despite of 50% decrease of fuel thermal conductivity after swelling, inherent negative reactivity feedback and passive decay heat removal capability could secure an ample safety margin of peak fuel centerline temperature in tow safety analyses, unprotected transient overpower and unprotected loss of heat sink. The likelihood of loss of coolant, loss of flow, and local blockage is virtually eliminated by employing respectively a double-walled vessel, pump-less cooling, and cross-flow allowed open square assemblies. Simple fabrication, modular construction, and long burning cycle would compensate for economic disadvantages over smaller power and lower temperature than those of conventional fast reactors. (C) 2011 Elsevier B.V. All rights reserved ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher ELSEVIER SCIENCE SA ko
dc.subject LEAD-BISMUTH ko
dc.subject DESIGN ko
dc.subject STEELS ko
dc.subject CORROSION ko
dc.subject FUEL ko
dc.subject BEHAVIOR ko
dc.subject COOLANT ko
dc.subject SYSTEMS ko
dc.subject PEACER ko
dc.title PASCAR: Long burning small modular reactor based on natural circulation ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-79955008190 ko
dc.identifier.wosid 000291126000026 ko
dc.type.rims ART ko
dc.description.wostc 13 *
dc.description.scopustc 17 * 2015-12-28 * 2015-11-04 *
dc.identifier.doi 10.1016/j.nucengdes.2011.03.005 ko
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