Simulations of single and twophase shock tubes and gravitydriven wave problems with the RELAP7 nuclear reactor system analysis code
Abstract
Propagation of pressure waves in single and twophase flows is of key interest for nuclear safety analyses, reactor design, construction and life extension of nuclear reactors. In this work, we assess the capabilities of RELAP7, the nextgeneration nuclear reactor system code, to solve single and twophase flows developing pressure waves. RELAP7 is based on a 7equation, twophase flow model, with distinct phasic pressures. It is well established that these hyperbolic conservation laws can develop shocks and discontinuities, and thus require a stabilization numerical method. The allMach flow Entropy Viscosity Method (EVM) is new employed in RELAP7 as a viscous stabilization approach. In this paper, we briefly describe the implementation of the EVM and use openliterature test cases that exhibit pressure waves to show that the entropy viscosity method performs adequately for these single and twophase cases.
 Authors:

 Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
 Texas A & M Univ., College Station, TX (United States)
 Idaho National Lab. (INL), Idaho Falls, ID (United States)
 Publication Date:
 Research Org.:
 Idaho National Lab. (INL), Idaho Falls, ID (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
 Sponsoring Org.:
 USDOE Office of Nuclear Energy (NE)
 OSTI Identifier:
 1396017
 Alternate Identifier(s):
 OSTI ID: 1394240
 Report Number(s):
 INL/JOU1639762
Journal ID: ISSN 00295493; PII: S0029549317302145
 Grant/Contract Number:
 AC0705ID14517; AC0500OR22725
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Nuclear Engineering and Design
 Additional Journal Information:
 Journal Volume: 319; Journal Issue: C; Journal ID: ISSN 00295493
 Publisher:
 Elsevier
 Country of Publication:
 United States
 Language:
 English
 Subject:
 97 MATHEMATICS AND COMPUTING; 22 GENERAL STUDIES OF NUCLEAR REACTORS; 42 ENGINEERING; entropy viscosity method; lowMach flow; pressure waves; RELAP7; sevenequation model; single phase flows; twophase flows; waterhammer
Citation Formats
Delchini, Marc O., Ragusa, Jean C., and Berry, Ray A. Simulations of single and twophase shock tubes and gravitydriven wave problems with the RELAP7 nuclear reactor system analysis code. United States: N. p., 2017.
Web. doi:10.1016/j.nucengdes.2017.04.034.
Delchini, Marc O., Ragusa, Jean C., & Berry, Ray A. Simulations of single and twophase shock tubes and gravitydriven wave problems with the RELAP7 nuclear reactor system analysis code. United States. doi:10.1016/j.nucengdes.2017.04.034.
Delchini, Marc O., Ragusa, Jean C., and Berry, Ray A. Fri .
"Simulations of single and twophase shock tubes and gravitydriven wave problems with the RELAP7 nuclear reactor system analysis code". United States. doi:10.1016/j.nucengdes.2017.04.034. https://www.osti.gov/servlets/purl/1396017.
@article{osti_1396017,
title = {Simulations of single and twophase shock tubes and gravitydriven wave problems with the RELAP7 nuclear reactor system analysis code},
author = {Delchini, Marc O. and Ragusa, Jean C. and Berry, Ray A.},
abstractNote = {Propagation of pressure waves in single and twophase flows is of key interest for nuclear safety analyses, reactor design, construction and life extension of nuclear reactors. In this work, we assess the capabilities of RELAP7, the nextgeneration nuclear reactor system code, to solve single and twophase flows developing pressure waves. RELAP7 is based on a 7equation, twophase flow model, with distinct phasic pressures. It is well established that these hyperbolic conservation laws can develop shocks and discontinuities, and thus require a stabilization numerical method. The allMach flow Entropy Viscosity Method (EVM) is new employed in RELAP7 as a viscous stabilization approach. In this paper, we briefly describe the implementation of the EVM and use openliterature test cases that exhibit pressure waves to show that the entropy viscosity method performs adequately for these single and twophase cases.},
doi = {10.1016/j.nucengdes.2017.04.034},
journal = {Nuclear Engineering and Design},
number = C,
volume = 319,
place = {United States},
year = {2017},
month = {5}
}