Miriam Kreher

  • Program Year: 3
  • Academic Institution: Massachusetts Institute of Technology
  • Field of Study: Nuclear Engineering
  • Academic Advisor: Benoit Forget
  • Practicum(s):
    Los Alamos National Laboratory (2018)
  • Degree(s):
    B.S. Engineering Science, University of Pittsburgh, 2016

Summary of Research

High fidelity modeling and simulation remains a contemporary challenge of the nuclear industry. It is difficult to directly observe physical phenomena within nuclear reactors, thereby making virtual models a necessity for reactor analysis. High accuracy models can reduce dependence on experiments, cutting a great deal of cost and risk at laboratories. Such high fidelity models include multiphysics solvers that account for multiple physical phenomena that are coupled together, for instance, neutron flux and fuel depletion. Neutron flux is governed by the radiation transport equation, which requires information about nuclide densities. The neutron flux distribution, in turn, dictates the rate at which nuclides transmute. Depletion problems therefore require tight coupling between a radiation transport solver and an isotopic depletion solver. The mechanics of code coupling have ample room for improvement in efficiency and accuracy, namely in space and time discretization schemes.


Miriam A. Kreher, Benoit Forget, Kord Smith, "Single-Batch Monte Carlo for Multiphysics Coupling" Proc. Int. Conf. of Mathematics and Computational Methods Applied to Nuclear Science and Engineering, Portland OR (2019)
Miriam A. Rathbun, Rian Bahran, Jesson Hutchinson, Theresa Cutler "Design of an Intermediate Energy Critical Experiment to Validate Nuclear Data and Computational Methods in the Unresolved Resonance Region" PHYSOR, Cancun Mexico (2018)
Miriam A. Rathbun, David P. Griesheimer "Effect of Delayed Energy Release on Power Normalization in Reactor Depletion Calculations" ANS Transaction, San Fransisco (2017)


-MIT Nuclear Science & Engineering Department award for outstanding leadership, 2019
-Best poster, ANS winter meeting, "Design of an Intermediate Energy Critical Experiment to Validate Nuclear Data and Computational Methods in the Unresolved Resonance Region," Washington DC, 2017
-ANS Commendation for Leadership and Service, Madison WI, 2016
-George Washington Prize for most outstanding senior, University of Pittsburgh and Engineers' Society of Western PA, Pittsburgh PA, 2016
-Second place undergraduate winner, ANS Winter Meeting poster session, Washington DC, 2015: M.Rathbun and B.Forget "Uncertainty quantification in BEAVRS project"
-Selected participant of Nuclear Engineering Student Delegation, Washington DC, 2014

-DOE Nuclear Energy University Programs scholarship, 2013, 2014, 2015, 2016
-Nuclear Regulatory Commission scholarship, 2014-2016
-ANS scholarships, 2014, 2015, 2016