Neutron reflector analysis for the beam-port of the Missouri S&T Reactor

  • Tayfun AkyurekEmail author
  • Warren S. Vaz
  • Ayodeji B. Alajo
  • Jeffrey C. King
  • Shoaib Usman
  • Carlos H. C. Giraldo


A preliminary neutron reflector material selection and feasibility study of an inexpensive reflector replacement for the neutron beam-port at the 200 kW Missouri University of Science and Technology Research Reactor (MSTR) was conducted using Monte-Carlo techniques. The Monte-Carlo N-Particle transport code (MCNP6.1) was used to model the neutron beam-port of the Missouri S&T Reactor in order to study the effects of adding different reflector materials, in terms of the neutron flux reaching the radiography/tomography facility in front of MSTR’s neutron beam-port. Aluminum, beryllium, titanium, nickel, nickel-58, lead, bismuth, tungsten and stainless steel reflectors were modeled to find the best neutron reflector for the beam-port. After examining reflector materials, it was concluded that none of them were an improvement over the current design. Experimental thermal flux was measured to be 1.0 × 107 ± 3.16 × 103 cm−2 s−1 at the exit of beam port for current version of beam-port. The current ratio of beam port inlet and outlet obtained from simulations was found to be 3.37 × 104. The flux of beam port inlet was determined on the order of 1.0 × 1011 cm−2 s−1 which is consistent with previous findings.


Inexpensive neutron reflector Neutron beam-port Monte Carlo N-Particle (MCNP) 



The authors wish to thank the reactor staff for providing the beam-port blueprints and other reactor related information for the preparation of this article. This study was supported by Marmara University, Scientific Research Commission (BAPKO) under the research Project FEN-A-131016-0466. The corresponding author would also like to express his appreciation to Dr. Ozgur Delice for the fruitful discussions.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Tayfun Akyurek
    • 1
    Email author
  • Warren S. Vaz
    • 2
  • Ayodeji B. Alajo
    • 2
  • Jeffrey C. King
    • 3
  • Shoaib Usman
    • 2
  • Carlos H. C. Giraldo
    • 2
  1. 1.Department of Physics, Faculty of Art and ScienceMarmara UniversityKadikoy, IstanbulTurkey
  2. 2.Nuclear EngineeringMissouri University of Science and TechnologyRollaUSA
  3. 3.Nuclear Science and EngineeringColorado School of MinesGoldenUSA

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