Price: $49

Westinghouse Electric Company recognizes the importance of supporting students pursuing a career in reactor physics. For this reason, Westinghouse will be sponsoring the first 100 student workshop registrants by covering their fees. Contact for a discount code before registering. Limited space available in each workshop. Once these seats are filled, you will be put on a waitlist. You must request a discount code before registering. No refunds will be made if you do not contact us before registering.

Organized by Joshua Hanophy (INL), Hansol Park (ANL) through the Advanced Reactor Technology and Nuclear Energy Advanced Modeling and Simulation Programs

The goal of the training session is to gain familiarity modeling the running-in phase of pebble bed reactors (PBRs) with the MOOSE-based tools Griffin and Pronghorn. Griffin includes capabilities for neutronics and depletion calculations and provides power densities to Pronghorn. Pronghorn uses the power densities to calculate temperatures using a porous medium flow model and user input thermal-hydraulic conditions as well as simplified models for the pebble bed reactor structures. Griffin can use pregenerated multigroup libraries for cross sections or a new feature that enables using its own cross sections generated online. This workshop will provide hands-on exercises for online cross section generation, run-in phase modeling with Griffin, thermal-hydraulics modeling with Pronghorn, and multiphysics running-in modeling including a control rod withdrawal event from a non- equilibrium core.

The training will be conducted via the INL High Performance Computing (HPC) center. Trainees can either apply for: A) an INL HPC account and code licenses directly via ( or B) temporary INL HPC account and temporary access to the codes. Either way, details on the INL’s Nuclear Computational Resource Center training signup process will be shared with registered participants. Trainees must bring their own laptops. Details on the process will be shared with registered participants. Note the following cutoffs for INL HPC account and license applications:

Cutoff for U.S.A. nationals INL HPC account and licenses is April 15th, 2024.

Cutoff for foreign nationals INL HPC account and licenses is March 1st, 2024.


8:00 – 8:30 am (30 m): Overview of the PBR design & computer setup

8:30 – 9:30 am (60 m): Theory and hands-on online cross section generation for PBR

9:30 – 10:30 am (60 m): Hands-on neutronics running-in phase with Griffin

10:30 – 10:45 am (15 m): Coffee break

10:15 – 11:00 am (45 m): Hands-on thermal-hydraulics modeling with Pronghorn

11:30 – 12:00 am (30 m): Hands-on multiphysics running-in calculation / the control rod withdrawal event with a non-equilibrium core


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