Kostadin Ivanov

Chen, J., Hou, J., & Ivanov, K. (2023). A hybrid neutronics method with novel fission diffusion synthetic acceleration for criticality calculations. NUCLEAR ENGINEERING AND TECHNOLOGY, 55(4), 1428–1438. https://doi.org/10.1016/j.net.2022.12.022

Vaglio-Gaudard, C., Destouches, C., Hawari, A., Avramova, M., Ivanov, K., Valentine, T., … Hudelot, J.-P. (2023). 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. https://doi.org/10.3389/fenrg.2023.1110979

Takasugi, C., Aly, A., Holler, D., Abarca, A., Beeler, B., Avramova, M., & Ivanov, K. (2023). 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. https://doi.org/10.1016/j.nucengdes.2023.112474

Faure, Q., Delipei, G., Petruzzi, A., Avramova, M., & Ivanov, K. (2023). Fuel performance uncertainty quantification and sensitivity analysis in the presence of epistemic and aleatoric sources of uncertainties. FRONTIERS IN ENERGY RESEARCH, 11. https://doi.org/10.3389/fenrg.2023.1112978

Moloko, L. E., Bokov, P. M., Wu, X., & Ivanov, K. N. (2023). Prediction and uncertainty quantification of SAFARI-1 axial neutron flux profiles with neural networks. ANNALS OF NUCLEAR ENERGY, 188. https://doi.org/10.1016/j.anucene.2023.109813

Takasugi, C., Martin, N., Laboure, V., Ortensi, J., Ivanov, K., & Avramova, M. (2023). Preservation of kinetics parameters generated by Monte Carlo calculations in two-step deterministic calculations. EPJ NUCLEAR SCIENCES & TECHNOLOGIES, 9. https://doi.org/10.1051/epjn/2022056

Delipei, G. K., Rouxelin, P., Abarca, A., Hou, J., Avramova, M., & Ivanov, K. (2022). CTF-PARCS Core Multi-Physics Computational Framework for Efficient LWR Steady-State, Depletion and Transient Uncertainty Quantification. ENERGIES, 15(14). https://doi.org/10.3390/en15145226

Altahhan, M. R., Geemert, R., Avramova, M., & Ivanov, K. (2022). Extending a low-order inhomogeneous adjoint equations model to a higher-order model with verification on integral applications. ANNALS OF NUCLEAR ENERGY, 177. https://doi.org/10.1016/j.anucene.2022.109277

Rouxelin, P., Alfonsi, A., Strydom, G., Avramova, M., & Ivanov, K. (2022). Propagation of VHTRC manufacturing uncertainties with RAVEN/PHISICS. ANNALS OF NUCLEAR ENERGY, 165. https://doi.org/10.1016/j.anucene.2021.108667

Altahhan, M. R., Geemert, R., Avramova, M., & Ivanov, K. (2021). Development and verification of a higher-order mathematical adjoint nodal diffusion solver. ANNALS OF NUCLEAR ENERGY, 163. https://doi.org/10.1016/j.anucene.2021.108548

Ivanov, E., Sargeni, A., Ivanov, K., & Bruna, G. (2021). Evidence-based background for constrained uncertainty quantification in a core transient analysis. ANNALS OF NUCLEAR ENERGY, 164. https://doi.org/10.1016/j.anucene.2021.108606

Xu, Y., Hou, J., & Ivanov, K. (2021). Methodology for Discontinuity Factors Generation for Simplified P-3 Solver Based on Nodal Expansion Formulation. ENERGIES, 14(20). https://doi.org/10.3390/en14206478

Delipei, G. K., Hou, J., Avramova, M., Rouxelin, P., & Ivanov, K. (2021). Summary of comparative analysis and conclusions from OECD/NEA LWR-UAM benchmark Phase I. NUCLEAR ENGINEERING AND DESIGN, 384. https://doi.org/10.1016/j.nucengdes.2021.111474

Rouxelin, P., Alfonsi, A., Ivanov, K., & Strydom, G. (2020). Energy group search engine based on surrogate models constructed with the RAVEN/NEWT/PHISICS sequence. NUCLEAR ENGINEERING AND DESIGN, 356. https://doi.org/10.1016/j.nucengdes.2019.110356

Nyalunga, G. P., Naicker, V. V., & Ivanov, K. (2019). Quantification and propagation of neutronics uncertainties of the Kozloduy-6 VVER-1000 fuel assembly using SCALE 6.2.1 within the NEA/OECD benchmark for uncertainty analysis in modelling of LWRs. ANNALS OF NUCLEAR ENERGY, 133, 732–749. https://doi.org/10.1016/j.anucene.2019.07.016

Petruzzi, A., Ivanov, K., & Ivanov, E. (2019, December 2). Selected papers from the 2018 Best Estimate Plus Uncertainty International Conference (BEPU 2018) Foreword. NUCLEAR TECHNOLOGY, Vol. 205, pp. III-IV. https://doi.org/10.1080/00295450.2019.1676080

Zeng, K., Hou, J., Ivanov, K., & Jessee, M. A. (2019). Uncertainty Quantification and Propagation of Multiphysics Simulation of the Pressurized Water Reactor Core. Nuclear Technology, 205(12), 1618–1637. https://doi.org/10.1080/00295450.2019.1580533

Rouxelin, P., Strydom, G., Alfonsi, A., & Ivanov, K. (2018). The IAEA CRP on HTGR uncertainties: Sensitivity study of PHISICS/RELAP5-3D MHTGR-350 core calculations using various SCALE/NEWT cross-section sets for Ex. II-1a. Nuclear Engineering and Design, 329, 156–166. https://doi.org/10.1016/J.NUCENGDES.2017.12.008

Georgieva, E., Dinkov, Y., & Ivanov, K. (2017). Benchmarking the Real-Time Core Model for VVER-1000 Simulator Application on Asymmetric Core Load. JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE, 3(3). https://doi.org/10.1115/1.4035550

Pericas, R., Ivanov, K., Reventós, F., & Batet, L. (2017). Comparison of Best-Estimate Plus Uncertainty and Conservative Methodologies for a PWR MSLB Analysis Using a Coupled 3-D Neutron-Kinetics/Thermal-Hydraulic Code. Nuclear Technology, 198(2), 193–201. https://doi.org/10.1080/00295450.2017.1299493

Shi, J., Levine, S., & Ivanov, K. (2017). New techniques for designing the initial and reload cores with constant long cycle lengths. Annals of Nuclear Energy, 99, 165–173. https://doi.org/10.1016/J.ANUCENE.2016.08.018

Hou, J., Ivanov, K. N., Boyarinov, V. F., & Fomichenko, P. A. (2017). OECD/NEA benchmark for time-dependent neutron transport calculations without spatial homogenization. NUCLEAR ENGINEERING AND DESIGN, 317, 177–189. https://doi.org/10.1016/j.nucengdes.2017.02.008

Bratton, R. N., Jessee, M. A., Wieselquist, W. A., & Ivanov, K. N. (2017). Rod Internal Pressure Distribution and Uncertainty Analysis Using FRAPCON. NUCLEAR TECHNOLOGY, 197(1), 47–63. https://doi.org/10.13182/nt16-75

Thompson, S. A., & Ivanov, K. N. (2016). Advances in the Pennsylvania State University NEM code. ANNALS OF NUCLEAR ENERGY, 94, 251–262. https://doi.org/10.1016/j.anucene.2016.03.014

Georgieva, E., Dinkov, Y., Ivanov, K., & Stieglitz, R. (2016). Benchmarking the NEM real-time core model for VVER-1000 simulator application - asymmetric core. Proceedings of the 24th International Conference on Nuclear Engineering, 2016, vol 5. https://doi.org/10.1115/icone24-60135

Pericas, R., Ivanov, K., Reventós, F., & Batet, L. (2016). Code improvement and model validation for Ascó-II Nuclear Power Plant model using a coupled 3D neutron kinetics/thermal–hydraulic code. Annals of Nuclear Energy, 87, 366–374. https://doi.org/10.1016/J.ANUCENE.2015.09.024

Bennett, A., Avramova, M., & Ivanov, K. (2016). Coupled MCNP6/CTF code: Development, testing, and application. ANNALS OF NUCLEAR ENERGY, 96, 1–11. https://doi.org/10.1016/j.anucene.2016.05.008

Bostelmann, F., Strydom, G., Reitsma, F., & Ivanov, K. (2016, September). The IAEA coordinated research programme on HTGR uncertainty analysis: Phase I status and Ex. I-1 prismatic reference results. NUCLEAR ENGINEERING AND DESIGN, Vol. 306, pp. 77–88. https://doi.org/10.1016/j.nucengdes.2015.12.009

Hou, J., Choi, H., & Ivanov, K. N. (2015). Development of an iterative diffusion-transport method based on MICROX-2 cross section libraries. ANNALS OF NUCLEAR ENERGY, 77, 335–342. https://doi.org/10.1016/j.anucene.2014.11.014

Ngeleka, T. P., Ivanov, K. N., & Levine, S. (2015). Examination and refinement of fine energy group structure for high temperature reactor analysis. Annals of Nuclear Energy, 80, 279–292. https://doi.org/10.1016/J.ANUCENE.2015.01.038

Ivanov, A., Sanchez, V., Stieglitz, R., & Ivanov, K. (2015). Large-scale Monte Carlo neutron transport calculations with thermal hydraulic feedback. Annals of Nuclear Energy, 84, 204–219. https://doi.org/10.1016/J.ANUCENE.2014.12.030

Avramova, M., Ivanov, K., Kozlowski, T., Pasichnyk, I., Zwermann, W., Velkov, K., … Gulliford, J. (2015). Multi-physics and multi-scale benchmarking and uncertainty quantification within OECD/NEA framework. Annals of Nuclear Energy, 84, 178–196. https://doi.org/10.1016/J.ANUCENE.2014.12.014

Levine, S., Blyth, T., & Ivanov, K. (2015). The effect of changing enrichments on core performance. Annals of Nuclear Energy, 75, 139–145. https://doi.org/10.1016/J.ANUCENE.2014.07.035

Georgieva, E. L., Dinkov, Y. D., & Ivanov, K. N. (2014). A cycle-specific cross-section update for real-time simulation of VVER-1000 core. Progress in Nuclear Energy, 74, 222–231. https://doi.org/10.1016/J.PNUCENE.2014.03.009

Hou, J., Choi, H., & Ivanov, K. (2014). ASSESSMENT OF MICROX-2 CODE WITH NEW ENDF/B-VII RELEASE 0 MASTER LIBRARIES. NUCLEAR TECHNOLOGY, 186(3), 305–316. https://doi.org/10.13182/nt12-137

Kozlowski, T., Wysocki, A., Gajev, I., Xu, Y., Downar, T., Ivanov, K., … Ma, W. (2014). Analysis of the OECD/NRC Oskarshamn-2 BWR stability benchmark. Annals of Nuclear Energy, 67, 4–12. https://doi.org/10.1016/J.ANUCENE.2013.09.028

Rosenkrantz, A., Avramova, M., Ivanov, K., Prinsloo, R., Botes, D., & Elsakhawy, K. (2014). Coupled 3D neutronics/thermal hydraulics modeling of the SAFARI-1 MTR. Annals of Nuclear Energy, 73, 122–130. https://doi.org/10.1016/J.ANUCENE.2014.06.018

Ivanov, A., Sanchez, V., & Ivanov, K. (2014). High-Fidelity Coupled Monte-Carlo/Thermal-Hydraulics Calculations. In D. Caruge, C. Calvin, C. M. Diop, F. Malvagi, & J.-C. Trama (Eds.), SNA + MC 2013 - Joint International Conference on Supercomputing in Nuclear Applications + Monte Carlo. https://doi.org/10.1051/SNAMC/201402304

Ivanov, A., Sanchez, V., Stieglitz, R., & Ivanov, K. (2014). Internal multi-scale multi-physics coupled system for high fidelity simulation of light water reactors. Annals of Nuclear Energy, 66, 104–112. https://doi.org/10.1016/J.ANUCENE.2013.12.003

Colameco, D., Ivanov, B. D., Beacon, D., & Ivanov, K. N. (2014). Iterative Transport-Diffusion Methodology For LWR Core Analysis. In D. Caruge, C. Calvin, C. M. Diop, F. Malvagi, & J.-C. Trama (Eds.), SNA + MC 2013 - Joint International Conference on Supercomputing in Nuclear Applications + Monte Carlo. https://doi.org/10.1051/SNAMC/201401104

Ghrayeb, S. Z., Ougouag, A. M., Ouisloumen, M., & Ivanov, K. N. (2014). Multi-group formulation of the temperature-dependent resonance scattering model and its impact on reactor core parameters. Annals of Nuclear Energy, 63, 751–762. https://doi.org/10.1016/J.ANUCENE.2013.07.031

Hou, J., Choi, H., & Ivanov, K. N. (2014). Self-shielding models of MICROX-2 code: Review and updates. ANNALS OF NUCLEAR ENERGY, 64, 256–263. https://doi.org/10.1016/j.anucene.2013.10.005

Clifford, I., Ivanov, K. N., & Avramova, M. N. (2013). 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. https://doi.org/10.1016/j.nucengdes.2012.11.016

Ivanov, A., Sanchez, V., Stieglitz, R., & Ivanov, K. (2013). High fidelity simulation of conventional and innovative LWR with the coupled Monte-Carlo thermal-hydraulic system MCNP-SUBCHANFLOW. Nuclear Engineering and Design, 262, 264–275. https://doi.org/10.1016/J.NUCENGDES.2013.05.008

Espel, F. P., Avramova, M. N., Ivanov, K. N., & Misu, S. (2013). 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. https://doi.org/10.1016/j.anucene.2012.06.031

Ellis, M. S., Watson, J., & Ivanov, K. (2013). Progress in the development of an implicit steady state solution in the coupled code TRACE/PARCS. Progress in Nuclear Energy, 66, 1–12. https://doi.org/10.1016/J.PNUCENE.2013.02.009

Levine, S., Blyth, T., & Ivanov, K. (2013). Understanding using the Haling Power Depletion (HPD) as a guide for designing PWR cores. Annals of Nuclear Energy, 53, 120–128. https://doi.org/10.1016/j.anucene.2012.09.025

Gomez-Torres, A. M., Sanchez-Espinoza, V. H., Ivanov, K., & Macian-Juan, R. (2012). DYNSUB: A high fidelity coupled code system for the evaluation of local safety parameters – Part I: Development, implementation and verification. Annals of Nuclear Energy, 48, 108–122. https://doi.org/10.1016/j.anucene.2012.05.011

Gomez-Torres, A. M., Sanchez-Espinoza, V. H., Ivanov, K., & Macian-Juan, R. (2012). DYNSUB: A high fidelity coupled code system for the evaluation of local safety parameters – Part II: Comparison of different temporal schemes. Annals of Nuclear Energy, 48, 123–129. https://doi.org/10.1016/j.anucene.2012.05.033

Ghrayeb, S. Z., Ouisloumen, M., Ougouag, A. M., & Ivanov, K. N. (2011). Deterministic modeling of higher angular moments of resonant neutron scattering. Annals of Nuclear Energy, 38(10), 2291–2297. https://doi.org/10.1016/j.anucene.2011.04.025

Espel, F. P., Tippayakul, C., Ivanov, K., & Misu, S. (2011). MCOR – Monte Carlo depletion code for reference LWR calculations. Annals of Nuclear Energy, 38(4), 731–741. https://doi.org/10.1016/j.anucene.2010.12.010

Mphahlele, R., Ougouag, A. M., Ivanov, K. N., & Gougar, H. D. (2011). Spectral zone selection methodology for pebble bed reactors. Annals of Nuclear Energy, 38(1), 80–87. https://doi.org/10.1016/j.anucene.2010.08.014

Espel, F. P., Tarantola, S., Ghrayeb, S., & Ivanov, K. (2010). Application of Global Sensitivity Analysis to Nuclear Reactor Calculations. Procedia - Social and Behavioral Sciences, 2(6), 7726–7727. https://doi.org/10.1016/j.sbspro.2010.05.199

Kriangchaiporn, N., Ivanov, K., Haghighat, A., & Sears, C. F. (2010). Transport model based on three-dimensional cross-section generation for TRIGA core analysis. Annals of Nuclear Energy, 37(9), 1254–1260. https://doi.org/10.1016/j.anucene.2010.04.011

Avramova, M. N., & Ivanov, K. N. (2010). Verification, validation and uncertainty quantification in multi-physics modeling for nuclear reactor design and safety analysis. Progress in Nuclear Energy, 52(7), 601–614. https://doi.org/10.1016/j.pnucene.2010.03.009

Xu, Y., Downar, T., Walls, R., Ivanov, K., Staudenmeier, J., & March-Lueba, J. (2009). Application of TRACE/PARCS to BWR stability analysis. Annals of Nuclear Energy, 36(3), 317–323. https://doi.org/10.1016/j.anucene.2008.12.022

Xulubana, V., Tippayakul, C., Ivanov, K., Levine, S. H., & Mahgerefteh, M. (2008). Accuracy evaluation of pin exposure calculations in current LWR core design codes. Annals of Nuclear Energy, 35(3), 414–424. https://doi.org/10.1016/j.anucene.2007.07.005

Tippayakul, C., Ivanov, K., & Frederick Sears, C. (2008). Development of a practical Monte Carlo based fuel management system for the Penn State University Breazeale Research Reactor (PSBR). Annals of Nuclear Energy, 35(3), 539–551. https://doi.org/10.1016/j.anucene.2007.07.013

Tyobeka, B., Ivanov, K., & Pautz, A. (2008). Evaluation of PBMR control rod worth using full three-dimensional deterministic transport methods. Annals of Nuclear Energy, 35(6), 1050–1055. https://doi.org/10.1016/j.anucene.2007.11.008

Alim, F., Ivanov, K. N., Yilmaz, S., & Levine, S. H. (2008). New genetic algorithms (GA) to optimize PWR reactors. Annals of Nuclear Energy, 35(1), 113–120. https://doi.org/10.1016/j.anucene.2007.05.004

Alim, F., Ivanov, K., & Levine, S. H. (2008). New genetic algorithms (GA) to optimize PWR reactors. Annals of Nuclear Energy, 35(1), 93–112. https://doi.org/10.1016/j.anucene.2007.05.007

Alim, F., Ivanov, K., & Levine, S. H. (2008). New genetic algorithms (GA) to optimize PWR reactors. Annals of Nuclear Energy, 35(1), 121–131. https://doi.org/10.1016/j.anucene.2007.05.008

D’Auria, F., Soloviev, S., Malofeev, V., Ivanov, K., & Parisi, C. (2008). The three-dimensional neutron kinetics coupled with thermal-hydraulics in RBMK accident analysis. Nuclear Engineering and Design, 238(4), 1002–1025. https://doi.org/10.1016/j.nucengdes.2007.03.003

Ivanov, K., & Avramova, M. (2007). Challenges in coupled thermal–hydraulics and neutronics simulations for LWR safety analysis. Annals of Nuclear Energy, 34(6), 501–513. https://doi.org/10.1016/j.anucene.2007.02.016

Tyobeka, B., Ivanov, K., & Pautz, A. (2007). Utilization of two-dimensional deterministic transport methods for analysis of pebble-bed reactors. Annals of Nuclear Energy, 34(5), 396–405. https://doi.org/10.1016/j.anucene.2007.01.014

Bousbia Salah, A., Vedovi, J., D'Auria, F., Galassi, G., & Ivanov, K. (2006). Analysis of the VVER1000 coolant trip benchmark using the coupled RELAP5/PARCS code. Progress in Nuclear Energy, 48(8), 806–819. https://doi.org/10.1016/j.pnucene.2006.06.005

Yilmaz, S., Ivanov, K., Levine, S., & Mahgerefteh, M. (2006). Application of genetic algorithms to optimize burnable poison placement in pressurized water reactors. Annals of Nuclear Energy, 33(5), 446–456. https://doi.org/10.1016/j.anucene.2005.11.012

Shkarupa, A., Kadenko, I., Malanich, A., Kovtonyuk, A., & Ivanov, K. (2006). Comparative RELAP5-3D analysis in support of the NPP DBA analysis in Ukraine. Progress in Nuclear Energy, 48(8), 891–911. https://doi.org/10.1016/j.pnucene.2006.06.001

Yilmaz, S., Ivanov, K., Levine, S., & Mahgerefteh, M. (2006). Development of enriched Gd-155 and Gd-157 burnable poison designs for a PWR core. Annals of Nuclear Energy, 33(5), 439–445. https://doi.org/10.1016/j.anucene.2005.11.011

Cuervo, D., Avramova, M., Ivanov, K., & Miró, R. (2006). Evaluation and enhancement of COBRA-TF efficiency for LWR calculations. Annals of Nuclear Energy, 33(9), 837–847. https://doi.org/10.1016/j.anucene.2006.03.011

Ivanov, B. D., Aniel, S., Siltanen, P., Royer, E., & Ivanov, K. N. (2006). Impact of cross-section generation procedures on the simulation of the VVER-1000 pump startup experiment in the OECD/DOE/CEA V1000CT benchmark by coupled 3D thermal-hydraulics/neutron kinetics models. Progress in Nuclear Energy, 48(8), 746–763. https://doi.org/10.1016/j.pnucene.2006.06.003

Ivanov, K. N. (2006). Introduction to the special issue on the OECD/DOE/CEA V1000CT-1 benchmark. Progress in Nuclear Energy, 48(8), 727. https://doi.org/10.1016/j.pnucene.2006.07.002

Alim, F., Bekar, K., Ivanov, K., Unlu, K., Brenizer, J., & Azmy, Y. (2006). Modeling and optimization of existing beam port facility of PSBR. Annals of Nuclear Energy, 33(17-18), 1391–1395. https://doi.org/10.1016/j.anucene.2006.10.007

Ivanov, B. D., Ivanov, K. N., Royer, E., Aniel, S., Bieder, U., Kolev, N., & Groudev, P. (2006). OECD/DOE/CEA VVER-1000 coolant transient (V1000CT) benchmark – A consistent approach for assessing coupled codes for RIA analysis. Progress in Nuclear Energy, 48(8), 728–745. https://doi.org/10.1016/j.pnucene.2006.06.002

Gozalvez, J. M., Yilmaz, S., Alim, F., Ivanov, K., & Levine, S. H. (2006). Sensitivity study on determining an efficient set of fuel assembly parameters in training data for designing of neural networks in hybrid genetic algorithms. Annals of Nuclear Energy, 33(5), 457–465. https://doi.org/10.1016/j.anucene.2005.12.006

Kolev, N., Petrov, N., Ivanov, B., & Ivanov, K. (2006). Simulation of the VVER-1000 pump start-up experiment of the OECD V1000CT benchmark with CATHARE and TRAC-PF1. Progress in Nuclear Energy, 48(8), 922–936. https://doi.org/10.1016/j.pnucene.2006.07.003

Reitsma, F., Strydom, G., de Haas, J. B. M., Ivanov, K., Tyobeka, B., Mphahlele, R., … Sikik, U. E. (2006). The PBMR steady-state and coupled kinetics core thermal-hydraulics benchmark test problems. Nuclear Engineering and Design, 236(5-6), 657–668. https://doi.org/10.1016/j.nucengdes.2005.12.007

Guler, C., Levine, S., Ivanov, K., Svarny, J., Krysl, V., Mikolas, P., & Sustek, J. (2004). Development of the VVER core loading optimization system. Annals of Nuclear Energy, 31(7), 747–772. https://doi.org/10.1016/j.anucene.2003.09.005

Ivanov, B. D., Ivanov, K. N., & Stamm'ler, R. J. J. (2004). Helios, current coupling collision probability method, applied for solving the NEA C5G7 MOX benchmark. Progress in Nuclear Energy, 45(2-4), 119–124. https://doi.org/10.1016/j.pnucene.2004.09.004

Tippayakul, C., Levine, S., Ivanov, K. N., & Mahgerefteh, M. (2004). Minimizing the gamma radiation effects to spent fuel pool walls. Annals of Nuclear Energy, 31(5), 459–480. https://doi.org/10.1016/j.anucene.2003.09.006