MULTIPHYSICS STEADY-STATE SIMULATION OF THE HIGH TEMPERATURE TEST REACTOR WITH MAMMOTH, BISON AND RELAP-7

Conference · Sun Aug 25 04:00:00 EDT 2019

OSTI ID:1529909

Laboure, Vincent M ^[1]; Ortensi, Javier ^[1]; Wang, Yaqi ^[1]; Schunert, Sebastian ^[1]; Gleicher, Frederick N ^[1]; DeHart, Mark D ^[1]; Martineau, Richard C ^[1]

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1. Idaho National Laboratory

In this work we present a new approach to solving a multiphysics steady-state simulation for the High Temperature Test Reactor (HTTR) using one Super Homogenization (SPH) corrected homogenized 3-D neutronics model in MAMMOTH, multiple heterogeneous 2-D axisymmetric fuel pin models in BISON and several 1-D annular flow thermohydraulics models in RELAP-7. The coupling of the different physics is complicated by the fundamentally disparate models, potentially affecting the stability of the global system. A pseudo-transient to converge the temperature fields is used to circumvent this difficulty. The benefit of doing so as opposed to having fully 3-D heterogenous models for all physics is that the computational burden for reactors as complex as HTTR may quickly become unbearable while coarse models may not capture all the essential phenomena of the problem. The driving purpose of this work is to establish a self-sustaining steady-state solution that can be used to start safety transients.

• Research Organization: Idaho National Laboratory (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: DOE-NE
• DOE Contract Number: AC07-05ID14517
• OSTI ID: 1529909
• Report Number(s): INL/CON-18-52202-Rev001
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
22 GENERAL STUDIES OF NUCLEAR REACTORS
97 MATHEMATICS AND COMPUTING
BISON
HTTR
MAMMOTH
Multiphysics
RELAP-7