[Crib-list] SPEAKER: Miriam Kreher (MIT) - "Virtual" CRIBB Seminar - 12-1pm - Fri. Feb. 5, 2021 (fwd)

[Shirley Entzminger]

         COMPUTATIONAL RESEARCH in BOSTON and BEYOND SEMINAR
 			     (CRIBB)


ZOOM info:

https://mit.zoom.us/j/96155042770
Meeting ID: 961 5504 2770

====================================

DATE:	Friday, February 5, 2021

TIME:	12:00 Noon - 1:00 PM


TITLE:	Computational Analysis of Nuclear Reactor Transients


SPEAKER:    MIRIAM KREHER
 	     (MIT - Nuclear Science & Engineering)


ABSTRACT:

Since nuclear experiments are costly and require extensive safety precautions, 
the nuclear industry relies heavily on modeling and simulation of nuclear 
systems.  The state-of-the-art simulation tool for steady-state neutron 
transport is Monte Carlo, a probabilistic approach to solving for the 
distribution of neutrons.

Although it is the most accurate tool available, it is very computationally 
expensive. Monte Carlo is even more burdensome when coupled to other physics 
which allows us to properly capture feedback effects from density and 
temperature changes. Nonetheless, it is imperative to do such coupling because 
nuclear reactor designs rely on these intrinsic feedback mechanisms to ensure 
passive safety. In addition to coupling Monte Carlo with other physics codes, 
there is an additional hurdle to overcome for time-dependent simulations. 
These are a few of the reasons why nuclear reactor simulations are a target of 
Exascale computing initiatives.

This talk will cover a number of coupling schemes that create feasible runtimes 
for coupled time-dependent Monte Carlo simulations.  In particular, we will 
give consideration to high-order/low-order schemes where Monte Carlo and 
diffusion solvers are paired to deliver accurate results in efficient time.

====

ABOUT THE SPEAKER:  Miriam Kreher is a PhD candidate in the Computational 
Reactor Physics Group in the MIT Nuclear Science and Engineering Department. 
She is also a fellow of the DOE Computational Science Graduate Fellowship 
program. Kreher received a BS in Engineering Science from the University of 
Pittsburgh in 2016. Kreher is a contributor of OpenMC and currently serves on 
the Board of Directors of the American Nuclear Society.

=======================================

For information about the "Computational Research in Boston and Beyond Seminar 
(CRIBB), please visit:

 		https://math.mit.edu/sites/crib/


=================

Shirley A. Entzminger
Administrative Assistant II
Department of Mathematics
Massachusetts Institute of Technology
77 Massachusetts Avenue
Building 2, Room 350A
Cambridge, MA 02139
PHONE: 	(617) 253-4994
E-mail:	daisymae at math.mit.edu
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