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  • 2020
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  • Jaakko Leppänen
2020

A Serpent2-SUBCHANFLOW-TRANSURANUS coupling for pin-by-pin depletion calculations in Light Water Reactors

García, M., Tuominen, R., Gommlich, A., Ferraro, D., Valtavirta, V., Imke, U., Van Uffelen, P., Mercatali, L., Sanchez-Espinoza, V., Leppänen, J. & Kliem, S., May 2020, In : Annals of Nuclear Energy. 139, 107213.

Research output: Contribution to journalArticle

Benchmark of Serpent-2 with MCNP: Application to European DEMO HCPB breeding blanket

Lu, Y., Zhou, G., Hernández, F. A., Pereslavtsev, P., Leppänen, J. & Ye, M., 27 Feb 2020, In : Fusion Engineering and Design. 155, 111583.

Research output: Contribution to journalArticle

Serpent/SUBCHANFLOW pin-by-pin coupled transient calculations for a PWR minicore

Ferraro, D., García, M., Valtavirta, V., Imke, U., Tuominen, R., Leppänen, J. & Sanchez-Espinoza, V., Mar 2020, In : Annals of Nuclear Energy. 137, 107090.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Serpent/SUBCHANFLOW pin-by-pin coupled transient calculations for the SPERT-IIIE hot full power tests

Ferraro, D., García, M., Valtavirta, V., Imke, U., Tuominen, R., Leppänen, J. & Sanchez-Espinoza, V., 21 Feb 2020, In : Annals of Nuclear Energy. 142, 107387.

Research output: Contribution to journalArticle

Open Access

Serpent2-SUBCHANFLOW pin-by-pin modelling capabilities for VVER geometries

García, M., Ferraro, D., Valtavirta, V., Tuominen, R., Imke, U., Leppänen, J. & Sanchez-Espinoza, V., Jan 2020, In : Annals of Nuclear Energy. 135, 106955.

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
2019
4 Citations (Scopus)

A Review of District Heating Reactor Technology

Leppänen, J., 10 Jan 2019, VTT Technical Research Centre of Finland. 14 p. (VTT Research Report; No. VTT-R-06895-18).

Research output: Book/ReportReport

Open Access
File
328 Downloads (Pure)

Development and test of a hybrid probabilistic-deterministic framework based on the interface current method

Yi, H., Demazière, C., Vinai, P. & Leppänen, J., 2019, International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019. American Nuclear Society ANS, p. 2166-2177 12 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Energy-dependent fission yields in advanced reactors

Kunchev, T., Shwageraus, E. & Leppänen, J., 1 Jan 2019, International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019. American Nuclear Society ANS, p. 710-718 9 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Global variance reduction scheme with self-adaptive weight-window mesh in the Serpent 2 Monte Carlo Code

Leppänen, J. & Jokipii, M., 2019, International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019. American Nuclear Society ANS, p. 85-95 11 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Kraken: An upcoming Finnish reactor analysis framework

Valtavirta, V., Hovi, V., Loukusa, H., Rintala, A., Sahlberg, V., Tuominen, R. & Leppänen, J., 2019, International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2019. American Nuclear Society ANS, p. 786-795 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)
1 Citation (Scopus)

Radiation transport capabilities in the Serpent 2 Monte Carlo code

Leppänen, J., 2019.

Research output: Contribution to conferenceConference articleScientificpeer-review

Response Matrix Method–Based Importance Solver and Variance Reduction Scheme in the Serpent 2 Monte Carlo Code

Leppänen, J., 30 Apr 2019, In : Nuclear Technology. 205, 11, p. 1416-1432 17 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Serpent/SCF pin-level multiphysics solutions for the VERA Fuel Assembly benchmark

Ferraro, D., Garcia, M., Imke, U., Valtavirta, V., Leppänen, J. & Sanchez-Espinoza, V., 9 Jan 2019, In : Annals of Nuclear Energy. 128, p. 102-114 13 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Serpent and TRIPOLI-4® transient calculations comparisons for several reactivity insertion scenarios in a 3D PWR minicore benchmark

Ferraro, D., Faucher, M., Mancusi, D., Zoia, A., Valtavirta, V., Leppänen, J. & Sanchez-Espinoza, V. H., Aug 2019, International Conference on Mathematics Computational Methods and Reactor Physics (M&C 2019). American Nuclear Society ANS, p. 1734-1743 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

2 Citations (Scopus)

Serpent validation using giacint facility experimental data from a control rod insertion transient

Talamo, A., Gohar, Y. A., Valtavirta, V., Leppänen, J., Sikorin, S., Mandzik, S., Polazau, S. & Hryharovich, T., Aug 2019, International Conference on Mathematics Computational Methods and Reactor Physics (M&C 2019). American Nuclear Society ANS, p. 2657-2663 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

2018

Advancement of functional expansion capabilities: Implementation and optimization in Serpent 2

Wendt, B., Kerby, L., Tumulak, A. & Leppänen, J., 1 Aug 2018, In : Nuclear Engineering and Design. 334, p. 138-153 16 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Application of the Serpent–OpenFOAM Coupled Code System to the SEALER Reactor Core

Tuominen, R., Valtavirta, V. & Leppänen, J., 2018, Proceedings of PHYSOR 2018.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsProfessional

Applications of Serpent 2 Monte Carlo Code to ITER Neutronics Analysis

Turner, A., Burns, A., Colling, B. & Leppänen, J., 17 Nov 2018, In : Fusion Science and Technology. 74, 4, p. 315-320 6 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Assessment of Serpent Cross Sections of the Second Generation Fuel of TVEL for Loviisa NPP

Kuopanportti, J., Leppänen, J. & Saarinen, S., 2018, (Accepted/In press) Proceedings of the PHYSOR 2018, Cancun, Mexico. American Nuclear Society ANS

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Calculation chain for the analysis of spent nuclear fuel in long-term interim dry storage

Arkoma, A., Huhtanen, R., Leppänen, J., Peltola, J. & Pättikangas, T., 22 Apr 2018, In : Annals of Nuclear Energy. 119, p. 129–138 10 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Collision-history based sensitivity/perturbation calculation capabilities in Serpent 2.1.30

Valtavirta, V., Aufiero, M. & Leppänen, J., 2018. 12 p.

Research output: Contribution to conferenceConference articleScientificpeer-review

Development of a spatial domain decomposition scheme for Monte Carlo neutron transport

García, M., Ferraro, D., Sanchez-Espinoza, V. H., Mercatali, L., Leppänen, J. & Valtavirta, V., Nov 2018, 26th International Conference on Nuclear Engineering: Nuclear Fuel and Material, Reactor Physics, and Transport Theory. American Society of Mechanical Engineers ASME, Vol. 3. 7 p. ICONE26-82144

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Effects of fuel temperature history approximations on neutronics properties of a BWR assembly

Valtavirta, V. & Leppänen, J., 2018, (Accepted/In press) Proceedings of the PHYSOR 2018, Cancun, Mexico. American Nuclear Society ANS, p. 2215-2226 12 p.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Foreseen capabilities, bottlenecks identification and potential limitations of serpent MC transport code in large-scale full 3-D burnup calculations

Ferraro, D., Garcia, M., Mercatali, L., Sanchez Espinoza, V. H., Leppänen, J. & Valtavirta, V., Nov 2018, 26th International Conference on Nuclear Engineering: Nuclear Fuel and Material, Reactor Physics, and Transport Theory. American Society of Mechanical Engineers ASME, Vol. 3. 9 p. ICONE26-82305

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

2 Citations (Scopus)

New stochastic substep based burnup scheme for Serpent 2

Valtavirta, V. & Leppänen, J., 2018, (Accepted/In press) Proceedings of PHYSOR 2018, Cancun, Mexico. American Nuclear Society ANS, p. 523-534

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

SERPENT validation and optimization with mesh adaptive search on stereolithography geometry models

Talamo, A., Gohar, Y. & Leppänen, J., 1 May 2018, In : Annals of Nuclear Energy. 115, p. 619-632 14 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2017

Advancement of functional expansion tallies capabilities in serpent 2

Wendt, B. L., Kerby, L. M., Tumulak, A. G., Leppänen, J. I. & Dehart, M. D., 1 Jan 2017, In : Transactions of the American Nuclear Society. 116, p. 552-555 4 p.

Research output: Contribution to journalArticle in a proceedings journal

Open Access
1 Citation (Scopus)

Coupled burnup calculations with the serpent 2 Monte Carlo code

Valtavirta, V. & Leppänen, J., 2017. 12 p.

Research output: Contribution to conferenceConference articleScientificpeer-review

Open Access

Coupled neutronics-fuel behavior calculations in steady state using the Serpent 2 Monte Carlo code

Valtavirta, V., Leppänen, J. & Viitanen, T., 2017, In : Annals of Nuclear Energy. 100, Part 2, p. 50-64 15 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Development of a coupled neutron / photon transport mode in the serpent 2 Monte Carlo code

Leppänen, J., Kaltiaisenaho, T., Valtavirta, V. & Metsälä, M., 2017. 6 p.

Research output: Contribution to conferenceConference articleScientificpeer-review

Open Access

Development of a Monte Carlo based calculation sequence for reactor core safety analyses (MONSOON)

Leppänen, J., 2017, SAFIR2018 - The Finnish Research Programme on Nuclear Power Plant Safety 2015-2018: Interim Report. VTT Technical Research Centre of Finland, p. 175-185 (VTT Technology, Vol. 294).

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

Open Access

Development of a variance reduction scheme in the serpent 2 Monte Carlo code

Leppänen, J., Viitanen, T. & Hyvönen, O., 2017. 7 p.

Research output: Contribution to conferenceConference articleScientificpeer-review

Open Access
1 Citation (Scopus)

Implementation of weighted delta-tracking with scattering in the serpent 2 monte carlo code

Rehak, J. S., Kerby, L. M., Dehart, M. D., Slaybaugh, R. N. & Leppänen, J., 1 Jan 2017, 2017 Annual Meeting. American Nuclear Society ANS, Vol. 116. p. 548-551 4 p. (Transactions of the American Nuclear Society, Vol. 116).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Open Access

MCNP6 and SERPENT2 performances with unstructured mesh geometry

Talamo, A., Gohar, Y. A. & Leppänen, J., 1 Jan 2017, In : Transactions of the American Nuclear Society. 116, 2, p. 1111-1113 3 p.

Research output: Contribution to journalArticle in a proceedings journal

Open Access

New approaches and applications for Monte Carlo perturbation theory

Aufiero, M., Bidaud, A., Kotlyar, D., Leppänen, J., Palmiotti, G., Salvatores, M., Sen, S., Shwageraus, E. & Fratoni, M., 2017. 8 p.

Research output: Contribution to conferenceConference articleScientificpeer-review

Open Access

Nuclear criticality and safety analyses preparedness at VTT (KATVE)

Juutilainen, P., Dorval, E., Huhtanen, R., Leppänen, J., Räty, A., Häkkinen, S., Kaltiaisenaho, T., Kotiluoto, P., Peltola, J., Rantamäki, K., Valtavirta, V., Tuominen, R. & Viitanen, T., 2017, SAFIR2018 - The Finnish Research Programme on Nuclear Power Plant Safety 2015-2018: Interim Report. VTT Technical Research Centre of Finland, p. 162-174 (VTT Technology, Vol. 294).

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

Open Access
3 Citations (Scopus)

Preliminary serpent-MOOSE coupling and implementation of functional expansion tallies in serpent

Kerby, L., Tumulak, A., Leppänen, J. & Valtavirta, V., 2017. 4 p.

Research output: Contribution to conferenceConference articleScientificpeer-review

Open Access

SERPENT performance with hybrid combinatorial and stereolithographic geometry

Talamo, A., Gohar, Y. & Leppänen, J., 2017. 7 p.

Research output: Contribution to conferenceConference articleScientificpeer-review

Open Access

The precursor-based delayed neutrons emission model applied to a water level transient

Talamo, A., Gohar, Y., Leppänen, J. & Valtavirta, V., 2017, In : Transactions of the American Nuclear Society. 117, p. 1290-1291 3 p.

Research output: Contribution to journalArticle in a proceedings journal

1 Citation (Scopus)
2016

Calculating neutron dosimeter activation in VVER-440 surveillance chains with Serpent

Viitanen, T. & Leppänen, J., 2016, 26th Symposium of AER on VVER Reactor Physics and Reactor Safety : Book of Abstracts. p. 181-188

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Coupling Serpent and OpenFOAM for neutronics - CFD multi-physics calculations

Tuominen, R., Valtavirta, V., Peltola, J. & Leppänen, J., 2016, PHYSOR 2016: Unifying Theory and Experiments in the 21st Century. American Nuclear Society ANS, p. 255-269

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Open Access
7 Citations (Scopus)

Expanding the Use of Serpent 2 to Fusion Applications: Shut-down Dose Rate Calculations

Leppänen, J. & Kaltiaisenaho, T., 2016, Proceedings of PHYSOR 2016. American Nuclear Society ANS

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

6 Citations (Scopus)

Expanding the use of Serpent 2 to Fusion Applications: Development of a Plasma Neutron Source

Sirén, P. & Leppänen, J., 2016, PHYSOR 2016: Unifying Theory and Experiments in the 21st Century. American Nuclear Society ANS

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

5 Citations (Scopus)

Mesh Adaptive Search Optimization in SERPENT2 Stereolithography Geometry

Talamo, A., Gohar, Y. A. & Leppänen, J., 2016, In : Transactions of the American Nuclear Society. 115, p. 1127-1129

Research output: Contribution to journalArticle in a proceedings journal

Multiphysics simulation of fast transients with the FINIX fuel behaviour module

Ikonen, T., Syrjälahti, E., Valtavirta, V., Loukusa, H., Leppänen, J. & Tulkki, V., 8 Sep 2016, In : EPJ Nuclear Sciences & Technologies. 2, 8 p., 37.

Research output: Contribution to journalArticleScientificpeer-review

Open Access

Neutronic Assessment of TRISO Particle Fuels in a Small Fluoride Salt-cooled High-temperature Reactor

Mohamed, H., Lindley, B., Parks, G. & Leppänen, J., 2016, Proceedings of PHYSOR 2016. American Nuclear Society ANS

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review