• Title/Summary/Keyword: Nuclear Reaction

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Relative Power Density Distribution Calculations of the Kori Unit 1 Pressurized Water Reactor with Full-Scope Explicit Modeling of Monte Carlo Simulation

  • Kim, Jong-Oh;Kim, Jong-Kyung
    • Nuclear Engineering and Technology
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    • v.29 no.5
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    • pp.375-384
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    • 1997

  • Relative power density distributions of the Kori Unit 1 pressurized water reactor are calculated by Monte Carlo modeling with the MCNP code. The Kori Unit 1 core is modeled on a three-dimensional representation of the one-eighth of the reactor in-vessel component with reflective boundaries at 0 and 45 degrees. The axial core model is based on half core symmetry and is divided into four axial segments. Fission reaction density in each rod is calculated by following 100 cycles with 5,000 test neutrons in each cycle after starling with a localized neutron source and ten noncontributing settle cycles. Relative assembly power distributions are calculated from fission reaction densities of rods in assembly. After 100 cycle calculations, the system converges to a k value of 1.00039 $\geq$ 0.00084. Relative assembly power distribution is nearly the same with that of the Kori Unit 1 FSAR. Applicability of the full-scope Monte Carlo simulation in the power distribution calculation is examined by the relative root moan square error of 2.159%.

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Direct Substitution Reaction of Phenylethyl Bromides

  • Jeong, Woon-Sou
    • Nuclear Engineering and Technology
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    • v.5 no.1
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    • pp.26-29
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    • 1973

  • Halongen exchange reactions of phenylethyl bromides have been studied in acetone at 25$^{\circ}$and 35$^{\circ}C$. Results show that the reaction proceeds by a typical S$_{N}$2 path, and steric crowding effect in 1-phenylethyl bromide gives large variation in the activation parameters for chloride exchange.

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