Maria Nikolova Avramova

Works (49)

Updated: October 3rd, 2023 05:00

2023 journal article

Challenge for the validation of high-fidelity multi-physics LWR modeling and simulation: Development of new experiments in research reactors

FRONTIERS IN ENERGY RESEARCH, 11.

By: C. Vaglio-Gaudard*, C. Destouches*, A. Hawari n, M. Avramova n, K. Ivanov n, T. Valentine*, P. Blaise*, J. Hudelot*

co-author countries: France 🇫🇷 United States of America 🇺🇸
author keywords: multi-physics; high-fidelity; coupling; validation; experiment; research reactors; reactivity feedback effects
Sources: Web Of Science, ORCID
Added: March 6, 2023

2023 journal article

Development of an efficient and improved core thermal-hydraulics predictive capability for fast reactors: Summary of research and development activities at the North Carolina state University

NUCLEAR ENGINEERING AND DESIGN, 412.

By: C. Takasugi n, A. Aly n, D. Holler n, A. Abarca n, B. Beeler n, M. Avramova n, K. Ivanov n

co-author countries: United States of America 🇺🇸
author keywords: CTF; Sodium fast reactors; Multi-physics; Hi2Lo
Sources: Web Of Science, ORCID
Added: August 21, 2023

2023 journal article

Fuel performance uncertainty quantification and sensitivity analysis in the presence of epistemic and aleatoric sources of uncertainties

FRONTIERS IN ENERGY RESEARCH, 11.

By: Q. Faure n, G. Delipei n, A. Petruzzi*, M. Avramova n & K. Ivanov n

co-author countries: Italy 🇮🇹 United States of America 🇺🇸
author keywords: fuel performance; uncertainty quantification (UQ); sensitivity analysis (SA); aleatoric uncertainty; epistemic uncertainty; pellet cladding mechanical interaction (PCMI)
Sources: Web Of Science, ORCID
Added: April 17, 2023

2023 journal article

Preservation of kinetics parameters generated by Monte Carlo calculations in two-step deterministic calculations

EPJ NUCLEAR SCIENCES & TECHNOLOGIES, 9.

co-author countries: United States of America 🇺🇸
Sources: Web Of Science, ORCID
Added: March 27, 2023

2022 journal article

Ab initio molecular dynamics investigation of gamma-(U,Zr) structural and thermal properties as a function of temperature and composition

JOURNAL OF NUCLEAR MATERIALS, 561.

By: A. Aly, B. Beeler n & M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: AIMD; DFT; Nuclear fuel element; Metallic Fuel; Uranium; U-Zr
Sources: Web Of Science, ORCID
Added: May 23, 2022

2022 journal article

CTF-PARCS Core Multi-Physics Computational Framework for Efficient LWR Steady-State, Depletion and Transient Uncertainty Quantification

ENERGIES, 15(14).

By: G. Delipei n, P. Rouxelin n, A. Abarca n, J. Hou n, M. Avramova n & K. Ivanov n

co-author countries: United States of America 🇺🇸
author keywords: multi-physics; CTF; PARCS; LWR; uncertainty quantification
Sources: Web Of Science, ORCID
Added: July 20, 2022

2022 journal article

CTF: A modernized, production-level, thermal hydraulic solver for the solution of industry-relevant challenge problems in pressurized water reactors

NUCLEAR ENGINEERING AND DESIGN, 397.

By: R. Salko*, A. Wysocki*, T. Blyth*, A. Toptan*, J. Hu*, V. Kumar*, C. Dances*, W. Dawn n ...

co-author countries: United States of America 🇺🇸
author keywords: Subchannel; LWR; CTF; VERA
Sources: Web Of Science, ORCID
Added: September 26, 2022

2022 journal article

Digital-twin-based improvements to diagnosis, prognosis, strategy assessment, and discrepancy checking in a nearly autonomous management and control system

ANNALS OF NUCLEAR ENERGY, 166.

By: L. Lin n, P. Athe n, P. Rouxelin n, M. Avramova n, A. Gupta n, R. Youngblood*, J. Lane*, N. Dinh n

co-author countries: United States of America 🇺🇸

Contributors: L. Lin n, P. Athe n, P. Rouxelin n, M. Avramova n, A. Gupta n, R. Youngblood*, J. Lane*, N. Dinh n

author keywords: autonomous control; digital twin; diagnosis; prognosis
Sources: Web Of Science, ORCID
Added: November 1, 2021

2022 journal article

Extending a low-order inhomogeneous adjoint equations model to a higher-order model with verification on integral applications

ANNALS OF NUCLEAR ENERGY, 177.

By: M. Altahhan n, R. Geemert, M. Avramova* & K. Ivanov*

co-author countries: United States of America 🇺🇸
author keywords: Nodal Expansion Method (NEM); Adjoint Lagrange Multiplier; Axial Offset (AO); Perturbation analysis; Sensitivity analysis; IAEA
Sources: Web Of Science, ORCID
Added: May 30, 2023

2022 journal article

Investigation of ?-(U, Zr) structural properties and its interfacial properties with liquid sodium using ab initio molecular dynamics

JOURNAL OF NUCLEAR MATERIALS, 567.

By: A. Aly, B. Beeler n & M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: Uranium; Metallic fuel; Interfacial energy; Elastic constants; Sodium bond; Sound velocity
Sources: Web Of Science, ORCID
Added: June 4, 2022

2022 journal article

Off-line vs. semi-implicit TH-TH coupling schemes: A BEPU comparison

ANNALS OF NUCLEAR ENERGY, 178.

By: M. Casamor*, M. Avramova n, F. Reventos* & J. Freixa*

co-author countries: Spain 🇪🇸 United States of America 🇺🇸
author keywords: PWR; Coupling; BEPU; DNBR
Source: Web Of Science
Added: October 2, 2023

2022 journal article

Propagation of VHTRC manufacturing uncertainties with RAVEN/PHISICS

ANNALS OF NUCLEAR ENERGY, 165.

By: P. Rouxelin n, A. Alfonsi*, G. Strydom*, M. Avramova n & K. Ivanov n

co-author countries: United States of America 🇺🇸
author keywords: PHISICS; RAVEN; VHTRC; Manufacturing Uncertainties; Monte Carlo Sampling
Sources: Web Of Science, ORCID
Added: November 8, 2021

2021 journal article

Development and verification of a higher-order mathematical adjoint nodal diffusion solver

ANNALS OF NUCLEAR ENERGY, 163.

By: M. Altahhan n, R. Geemert*, M. Avramova n & K. Ivanov n

co-author countries: Germany 🇩🇪 United States of America 🇺🇸
author keywords: Nodal Expansion Method (NEM); Lagrange multiplier; Adjoint; Diffusion equation; Verification; Perturbation analysis; Sensitivity analysis; IAEA-3D benchmark
Sources: Web Of Science, ORCID
Added: September 7, 2021

2021 journal article

Summary of comparative analysis and conclusions from OECD/NEA LWR-UAM benchmark Phase I

NUCLEAR ENGINEERING AND DESIGN, 384.

By: G. Delipei n, J. Hou n, M. Avramova n, P. Rouxelin n & K. Ivanov n

co-author countries: United States of America 🇺🇸
author keywords: LWR; Uncertainty analysis; Benchmark; Neutronics; Summary
Sources: Web Of Science, ORCID
Added: October 1, 2021

2020 article

Developments in thermal-hydraulic sub-channel modeling for whole core multi-physics simulations

Avramova, M. (2020, March). NUCLEAR ENGINEERING AND DESIGN, Vol. 358.

By: M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: Sub-channel modeling; Whole core multi-physics simulations; Physics-informed data-driven modeling
Source: Web Of Science
Added: February 10, 2020

2020 journal article

Modular high temperature gas reactor core modeling with RELAP5-3D/ PHISICS ? Optimization schemes for load following

NUCLEAR ENGINEERING AND DESIGN, 362.

By: P. Balestra n, K. Henry n, C. Carlyon n, C. English n, J. Myer n, M. Avramova n, A. Epiney*, G. Strydom*

co-author countries: United States of America 🇺🇸
Source: Web Of Science
Added: July 6, 2020

2019 journal article

A new fuel modeling capability, CTFFuel, with a case study on the fuel thermal conductivity degradation

NUCLEAR ENGINEERING AND DESIGN, 341, 248–258.

co-author countries: United States of America 🇺🇸
author keywords: CTFFuel; Thermal conductivity degradation; CTF; SQA; Verification
Source: Web Of Science
Added: December 31, 2018

2019 journal article

A surrogate model based on sparse grid interpolation for boiling water reactor subchannel void distribution

ANNALS OF NUCLEAR ENERGY, 131, 51–62.

By: A. Bennett*, N. Martin* & M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: Sparse grids; Void distribution; Local void model; F-COBRA-TF; ATRIUM 10; APOLLO2-A
Source: Web Of Science
Added: July 22, 2019

2019 journal article

CTF-R: A novel residual-based thermal hydraulic solver

NUCLEAR ENGINEERING AND DESIGN, 348, 37–45.

By: N. Porter*, V. Mousseau* & M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: Subchannel analysis; Residual; CTF; COBRA
Source: Web Of Science
Added: June 4, 2019

2019 journal article

Gap conductance modeling I: Theoretical considerations for single- and multi-component gases in curvilinear coordinates

NUCLEAR ENGINEERING AND DESIGN, 353.

By: A. Toptan n, D. Kropaczek n & M. Avramova

co-author countries: United States of America 🇺🇸
author keywords: Gap conductance; Temperature jump distance; Thermal accommodation coefficient; Static load; Mixture
Source: Web Of Science
Added: October 21, 2019

2019 journal article

Gap conductance modeling II: Optimized model for UO2-Zircaloy interfaces

NUCLEAR ENGINEERING AND DESIGN, 355.

By: A. Toptan n, D. Kropaczek n & M. Avramova

co-author countries: United States of America 🇺🇸
author keywords: Gap conductance; Continuum; Ross-Stoute; Nuclear fuel performance; Uncertainty; Doppler temperature
Source: Web Of Science
Added: November 18, 2019

2019 journal article

On the validity of the dilute gas assumption for gap conductance calculations in nuclear fuel performance codes

NUCLEAR ENGINEERING AND DESIGN, 350, 1–8.

By: A. Toptan n, D. Kropaczek n & M. Avramova

co-author countries: United States of America 🇺🇸
author keywords: Fill gas thermal conductivity; Gap conductance; Fuel performance; Doppler; Mixture thermal conductivity; Rod internal pressure; Dilute; Dense
Source: Web Of Science
Added: June 24, 2019

2019 article

Quantified Validation with Uncertainty Analysis for Turbulent Single-Phase Friction Models

Porter, N. W., Mousseau, V. A., & Avramova, M. N. (2019, December 2). NUCLEAR TECHNOLOGY, Vol. 205, pp. 1607–1617.

By: N. Porter n, V. Mousseau* & M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: Model form error; uncertainty analysis; validation; friction factor
Source: Web Of Science
Added: December 9, 2019

2018 journal article

Application of sub-channel modeling to BWR core analysis

ANNALS OF NUCLEAR ENERGY, 115, 294–302.

By: C. Gosdin* & M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: BWR; CTF; CASL; Sub-channel; Validation
Source: Web Of Science
Added: August 6, 2018

2018 journal article

CFD prediction of critical heat flux in vertical heated tubes with uniform and non-uniform heat flux

NUCLEAR ENGINEERING AND DESIGN, 326, 403–412.

By: Q. Li*, M. Avramova n, Y. Jiao*, P. Chen*, J. Yu*, Z. Pu*, J. Chen*

co-author countries: China 🇨🇳 United States of America 🇺🇸
author keywords: Subcooled boiling; Critical heat flux; DNB; Non-uniform heat flux; Boiling curves
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Implementation and assessment of wall friction models for LWR core analysis

ANNALS OF NUCLEAR ENERGY, 115, 565–572.

By: A. Toptan n, N. Porter n, R. Salko* & M. Avramova

co-author countries: United States of America 🇺🇸
author keywords: Friction factor; CTF; Pressure drop; Subchannel analysis; Validation; Verification
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Three-dimensional multi-physics modeling of hydrogen and hydride distribution in zirconium alloy cladding

PROGRESS IN NUCLEAR ENERGY, 105, 294–300.

By: M. Mankosa* & M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: Hydrogen; Hydride; Multi-physics; BISON; Tiamat
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Uncertainty Quantification Study of CTF for the OECD/NEA LWR Uncertainty Analysis in Modeling Benchmark

NUCLEAR SCIENCE AND ENGINEERING, 190(3), 271–286.

By: N. Porter n, M. Avramova n & V. Mousseau*

co-author countries: United States of America 🇺🇸
author keywords: Organisation for Economic Co-operation and Development/Nuclear Energy Agency Light Water Reactor Uncertainty Analysis in Modeling Benchmark; thermal hydraulics; CTF
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Validation of CTF pressure drop and void predictions for the NUPEC BWR database

NUCLEAR ENGINEERING AND DESIGN, 337, 291–299.

By: N. Porter n & M. Avramova n

co-author countries: United States of America 🇺🇸
Source: Web Of Science
Added: October 16, 2018

2017 journal article

Comparative analysis of different fidelity fuel performance models for fuel temperature predictions

NUCLEAR ENGINEERING AND DESIGN, 322, 464–473.

By: F. Raja*, M. Mankosa* & M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: CTF; BISON; FRAPCON; Nuclear; Fuel performance
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Evaluation of modeling options for in-pellet power distribution and gap gas conductance for accurate fuel temperature predictions

PROGRESS IN NUCLEAR ENERGY, 100, 135–145.

By: F. Raja* & M. Avramova n

co-author countries: United States of America 🇺🇸
author keywords: CTF; FRAPCON; Nuclear; Fuel temperature; Gap gas conductance
Source: Web Of Science
Added: August 6, 2018

2017 journal article

High-fidelity multi-physics coupling for determination of hydride distribution in Zr-4 cladding

ANNALS OF NUCLEAR ENERGY, 110, 475–485.

By: I. Davis*, O. Courty*, M. Avramova n & A. Motta*

co-author countries: United States of America 🇺🇸
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Multi-physics code system with improved feedback modeling

PROGRESS IN NUCLEAR ENERGY, 98, 94–108.

By: M. Yilmaz*, M. Avramova n & J. Andersen*

co-author countries: United States of America 🇺🇸
author keywords: Doppler feedback; Fuel thermal conductivity degradation; Nudear reactor multi-physics; CTF/TORT-TD; CTF/TORT-TD/FRAPCON-FRAPTRAN
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Coupled MCNP6/CTF code: Development, testing, and application

ANNALS OF NUCLEAR ENERGY, 96, 1–11.

By: A. Bennett n, M. Avramova n & K. Ivanov n

co-author countries: United States of America 🇺🇸
author keywords: MCNP6; CTF; Internal coupling; Relaxation acceleration
Sources: Web Of Science, ORCID
Added: August 6, 2018

2016 journal article

Development, verification, and validation of a fuel thermal conductivity degradation model in CTF

ANNALS OF NUCLEAR ENERGY, 97, 246–261.

By: M. Yilmaz*, M. Avramova n & J. Andersen*

co-author countries: United States of America 🇺🇸
author keywords: Fuel thermal conductivity; Fuel centerline temperature; CTF; FRAPCON-3.4
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Impact of fuel thermal conductivity degradation on Doppler feedback during rod ejection accident

NUCLEAR ENGINEERING AND DESIGN, 307, 339–353.

By: M. Yilmaz*, M. Avramova n & J. Andersen*

co-author countries: United States of America 🇺🇸
Source: Web Of Science
Added: August 6, 2018

2015 journal article

High-fidelity multi-physics system TORT-TD/CTF/FRAPTRAN for light water reactor analysis

Annals of Nuclear Energy, 84, 234–243.

By: J. Magedanz*, M. Avramova*, Y. Perin* & A. Velkov*

co-author countries: Germany 🇩🇪 United States of America 🇺🇸
author keywords: Coupled codes; COBRA-TF; FRAPTRAN; High-fidelity; Fuel performance
Source: Crossref
Added: February 24, 2020

2015 journal article

Multi-physics and multi-scale benchmarking and uncertainty quantification within OECD/NEA framework

Annals of Nuclear Energy, 84, 178–196.

By: M. Avramova*, K. Ivanov*, T. Kozlowski*, I. Pasichnyk*, W. Zwermann*, K. Velkov*, E. Royer*, A. Yamaji*, J. Gulliford*

co-author countries: Germany 🇩🇪 France 🇫🇷 United States of America 🇺🇸
author keywords: Benchmark; Uncertainty; Multi-physics; Multi-scale
Sources: Crossref, ORCID
Added: February 24, 2020

2015 journal article

Optimization and parallelization of the thermal–hydraulic subchannel code CTF for high-fidelity multi-physics applications

Annals of Nuclear Energy, 84, 122–130.

By: R. Salko*, R. Schmidt* & M. Avramova*

co-author countries: United States of America 🇺🇸
author keywords: Subchannel; COBRA-TF; Parallel; MPI; CTF
Source: Crossref
Added: August 28, 2020

2014 journal article

Coupled 3D neutronics/thermal hydraulics modeling of the SAFARI-1 MTR

Annals of Nuclear Energy, 73, 122–130.

By: A. Rosenkrantz*, M. Avramova*, K. Ivanov*, R. Prinsloo*, D. Botes* & K. Elsakhawy*

co-author countries: United States of America 🇺🇸 South Africa 🇿🇦
Sources: Crossref, ORCID
Added: August 28, 2020

2014 journal article

Investigations on coupled code PWR simulations using COBRA-TF with soluble boron tracking model

Progress in Nuclear Energy, 77, 72–83.

By: M. Biery* & M. Avramova*

co-author countries: United States of America 🇺🇸
author keywords: Boron dilution; Boron tracking model; Coupled code; Natural circulation
Source: Crossref
Added: August 28, 2020

2014 journal article

Multi-dimensional boron transport modeling in subchannel approach: Part I. Model selection, implementation and verification of COBRA-TF boron tracking model

Nuclear Engineering and Design, 278, 701–712.

By: O. Ozdemir*, M. Avramova* & K. Sato*

co-author countries: Japan 🇯🇵 United States of America 🇺🇸
Source: Crossref
Added: August 28, 2020

2014 journal article

Multi-dimensional boron transport modeling in subchannel approach: Part II. Validation of CTF boron tracking model and adding boron precipitation model

Nuclear Engineering and Design, 278, 713–722.

By: O. Ozdemir* & M. Avramova*

co-author countries: United States of America 🇺🇸
Source: Crossref
Added: August 28, 2020

2013 journal article

A multi-scale homogenization and reconstruction approach for solid material temperature calculations in prismatic high temperature reactor cores

Nuclear Engineering and Design, 256, 1–13.

By: I. Clifford*, K. Ivanov* & M. Avramova*

co-author countries: United States of America 🇺🇸
Sources: Crossref, ORCID
Added: August 28, 2020

2013 journal article

New developments of the MCNP/CTF/NEM/NJOY code system – Monte Carlo based coupled code for high accuracy modeling

Annals of Nuclear Energy, 51, 18–26.

By: F. Espel*, M. Avramova*, K. Ivanov* & S. Misu

co-author countries: United States of America 🇺🇸
author keywords: MCNP5; COBRA-TF; NEM; NJOY; Coupled calculations; BWR
Sources: Crossref, ORCID
Added: August 28, 2020

2013 journal article

Uncertainty analysis of sub-channel code calculated ONB wall superheat in rod bundle experiments using the GRS methodology

Progress in Nuclear Energy, 65, 42–49.

By: R. Salko* & M. Avramova*

co-author countries: United States of America 🇺🇸
author keywords: VIPRE-I; SUSA; NESTOR; ONB
Source: Crossref
Added: August 28, 2020

2010 journal article

Verification, validation and uncertainty quantification in multi-physics modeling for nuclear reactor design and safety analysis

Progress in Nuclear Energy, 52(7), 601–614.

By: M. Avramova* & K. Ivanov*

co-author countries: United States of America 🇺🇸
author keywords: Verification; Validation; Uncertainty; Design; Analysis
Sources: Crossref, ORCID
Added: August 28, 2020

2007 journal article

Challenges in coupled thermal–hydraulics and neutronics simulations for LWR safety analysis

Annals of Nuclear Energy, 34(6), 501–513.

By: K. Ivanov* & M. Avramova*

co-author countries: United States of America 🇺🇸
Sources: Crossref, ORCID
Added: August 28, 2020

2006 journal article

Evaluation and enhancement of COBRA-TF efficiency for LWR calculations

Annals of Nuclear Energy, 33(9), 837–847.

By: D. Cuervo*, M. Avramova*, K. Ivanov* & R. Miró*

co-author countries: Spain 🇪🇸 United States of America 🇺🇸
Sources: Crossref, ORCID
Added: August 28, 2020

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