Temperature-Dependent Benchmark Testing for H2O and D2O Using Experiments Performed with the New IPEN/MB-01 Setup

Luiz Leal; Adimir dos Santos; Travis Greene; Mathieu Dupont; Kemal Ramic; Jesse Brown; José Ignacio Márquez Damián; Vaibhav Jaiswal; Ulysses D’Utra Bitelli; Mitsuo Yamaguchi; Hugo Rodrigues Landim; Fernando de Castro Junqueira; Gregório Soares de Sousa; Michelangelo Durazzo; Elita Urano

doi:10.13182/NCSD25-47964

Temperature-Dependent Benchmark Testing for H₂O and D₂O Using Experiments Performed with the New IPEN/MB-01 Setup

Luiz Leal
, Adimir dos Santos
, Travis Greene
, Mathieu Dupont
, Kemal Ramic
, Jesse Brown
, José Ignacio Márquez Damián
, Vaibhav Jaiswal
, Ulysses D’Utra Bitelli
, Mitsuo Yamaguchi
, Hugo Rodrigues Landim
, Fernando de Castro Junqueira
, Gregório Soares de Sousa
, Michelangelo Durazzo
, Elita Urano

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The IPEN/MB-01 research reactor, located in São Paulo, Brazil, has successfully operated for about 30 years using fuel rods of UO₂ enriched to 4.3 wt %²³⁵U. For the past three decades, this reactor has served as the basis for several benchmark experiments published in the International Criticality Safety Benchmark Evaluation Project (ICSBEP) and the International Reactor Physics Evaluation Project. The integral experiment handbooks produced by these projects are frequently used by the nuclear community for nuclear data validation. The IPEN/MB-01 reactor was recently upgraded to replace rod-type fuels with plate-type fuels. The new IPEN/MB-01 core has a 4 × 5 configuration and 19 fuel elements consisting of U₃Si₂-Al enriched to 19.75 wt %²³⁵U. Temperature-dependent benchmark experiments were performed with the new IPEN/MB-01 research reactor configuration in the range of 293-353 K. This paper reports the results of calculations using thermal scattering evaluations for H₂O and D₂O in the ENDF/B-VIII.0 and ENDF/B-VIII.1 libraries in critical experiments performed with the new IPEN/MB-01 setup.

Original language	English
Title of host publication	Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025
Publisher	American Nuclear Society
Pages	222-230
Number of pages	9
ISBN (Electronic)	9780894482274
DOIs	https://doi.org/10.13182/NCSD25-47964
State	Published - 2025
Event	2025 Nuclear Criticality Safety Division Conference, NCSD 2025 - Austin, United States Duration: Sep 14 2025 → Sep 18 2025

Publication series

Name	Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025

Conference

Conference	2025 Nuclear Criticality Safety Division Conference, NCSD 2025
Country/Territory	United States
City	Austin
Period	09/14/25 → 09/18/25

Funding

This manuscript has been authored by UT-Battelle, LLC under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This material is based upon work supported by the US Department of Energy and the US Nuclear Regulatory Commission. Disclaimer: This work was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

Keywords

heavy and light water
reactor
thermal scattering law

Access to Document

10.13182/NCSD25-47964

Cite this

Leal, L., dos Santos, A., Greene, T., Dupont, M., Ramic, K., Brown, J., Márquez Damián, J. I., Jaiswal, V., D’Utra Bitelli, U., Yamaguchi, M., Landim, H. R., de Castro Junqueira, F., de Sousa, G. S., Durazzo, M., & Urano, E. (2025). Temperature-Dependent Benchmark Testing for H₂O and D₂O Using Experiments Performed with the New IPEN/MB-01 Setup. In Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025 (pp. 222-230). (Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025). American Nuclear Society. https://doi.org/10.13182/NCSD25-47964

Leal, Luiz ; dos Santos, Adimir ; Greene, Travis et al. / Temperature-Dependent Benchmark Testing for H₂O and D₂O Using Experiments Performed with the New IPEN/MB-01 Setup. Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025. American Nuclear Society, 2025. pp. 222-230 (Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025).

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title = "Temperature-Dependent Benchmark Testing for H2O and D2O Using Experiments Performed with the New IPEN/MB-01 Setup",

abstract = "The IPEN/MB-01 research reactor, located in S{\~a}o Paulo, Brazil, has successfully operated for about 30 years using fuel rods of UO2 enriched to 4.3 wt \%235U. For the past three decades, this reactor has served as the basis for several benchmark experiments published in the International Criticality Safety Benchmark Evaluation Project (ICSBEP) and the International Reactor Physics Evaluation Project. The integral experiment handbooks produced by these projects are frequently used by the nuclear community for nuclear data validation. The IPEN/MB-01 reactor was recently upgraded to replace rod-type fuels with plate-type fuels. The new IPEN/MB-01 core has a 4 × 5 configuration and 19 fuel elements consisting of U3Si2-Al enriched to 19.75 wt \%235U. Temperature-dependent benchmark experiments were performed with the new IPEN/MB-01 research reactor configuration in the range of 293-353 K. This paper reports the results of calculations using thermal scattering evaluations for H2O and D2O in the ENDF/B-VIII.0 and ENDF/B-VIII.1 libraries in critical experiments performed with the new IPEN/MB-01 setup.",

keywords = "heavy and light water, reactor, thermal scattering law",

author = "Luiz Leal and \{dos Santos\}, Adimir and Travis Greene and Mathieu Dupont and Kemal Ramic and Jesse Brown and \{M{\'a}rquez Dami{\'a}n\}, \{Jos{\'e} Ignacio\} and Vaibhav Jaiswal and \{D{\textquoteright}Utra Bitelli\}, Ulysses and Mitsuo Yamaguchi and Landim, \{Hugo Rodrigues\} and \{de Castro Junqueira\}, Fernando and \{de Sousa\}, \{Greg{\'o}rio Soares\} and Michelangelo Durazzo and Elita Urano",

note = "Publisher Copyright: {\textcopyright} Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025. All rights reserved.; 2025 Nuclear Criticality Safety Division Conference, NCSD 2025 ; Conference date: 14-09-2025 Through 18-09-2025",

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doi = "10.13182/NCSD25-47964",

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Leal, L, dos Santos, A, Greene, T , Dupont, M , Ramic, K , Brown, J, Márquez Damián, JI, Jaiswal, V, D’Utra Bitelli, U, Yamaguchi, M, Landim, HR, de Castro Junqueira, F, de Sousa, GS, Durazzo, M & Urano, E 2025, Temperature-Dependent Benchmark Testing for H₂O and D₂O Using Experiments Performed with the New IPEN/MB-01 Setup. in Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025. Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025, American Nuclear Society, pp. 222-230, 2025 Nuclear Criticality Safety Division Conference, NCSD 2025, Austin, United States, 09/14/25. https://doi.org/10.13182/NCSD25-47964

Temperature-Dependent Benchmark Testing for H₂O and D₂O Using Experiments Performed with the New IPEN/MB-01 Setup. / Leal, Luiz; dos Santos, Adimir; Greene, Travis et al.
Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025. American Nuclear Society, 2025. p. 222-230 (Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Dupont, Mathieu

AU - Ramic, Kemal

AU - Brown, Jesse

AU - Márquez Damián, José Ignacio

AU - Jaiswal, Vaibhav

AU - D’Utra Bitelli, Ulysses

AU - Yamaguchi, Mitsuo

AU - Landim, Hugo Rodrigues

AU - de Castro Junqueira, Fernando

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N2 - The IPEN/MB-01 research reactor, located in São Paulo, Brazil, has successfully operated for about 30 years using fuel rods of UO2 enriched to 4.3 wt %235U. For the past three decades, this reactor has served as the basis for several benchmark experiments published in the International Criticality Safety Benchmark Evaluation Project (ICSBEP) and the International Reactor Physics Evaluation Project. The integral experiment handbooks produced by these projects are frequently used by the nuclear community for nuclear data validation. The IPEN/MB-01 reactor was recently upgraded to replace rod-type fuels with plate-type fuels. The new IPEN/MB-01 core has a 4 × 5 configuration and 19 fuel elements consisting of U3Si2-Al enriched to 19.75 wt %235U. Temperature-dependent benchmark experiments were performed with the new IPEN/MB-01 research reactor configuration in the range of 293-353 K. This paper reports the results of calculations using thermal scattering evaluations for H2O and D2O in the ENDF/B-VIII.0 and ENDF/B-VIII.1 libraries in critical experiments performed with the new IPEN/MB-01 setup.

AB - The IPEN/MB-01 research reactor, located in São Paulo, Brazil, has successfully operated for about 30 years using fuel rods of UO2 enriched to 4.3 wt %235U. For the past three decades, this reactor has served as the basis for several benchmark experiments published in the International Criticality Safety Benchmark Evaluation Project (ICSBEP) and the International Reactor Physics Evaluation Project. The integral experiment handbooks produced by these projects are frequently used by the nuclear community for nuclear data validation. The IPEN/MB-01 reactor was recently upgraded to replace rod-type fuels with plate-type fuels. The new IPEN/MB-01 core has a 4 × 5 configuration and 19 fuel elements consisting of U3Si2-Al enriched to 19.75 wt %235U. Temperature-dependent benchmark experiments were performed with the new IPEN/MB-01 research reactor configuration in the range of 293-353 K. This paper reports the results of calculations using thermal scattering evaluations for H2O and D2O in the ENDF/B-VIII.0 and ENDF/B-VIII.1 libraries in critical experiments performed with the new IPEN/MB-01 setup.

KW - heavy and light water

KW - reactor

KW - thermal scattering law

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Leal L, dos Santos A, Greene T , Dupont M , Ramic K , Brown J et al. Temperature-Dependent Benchmark Testing for H₂O and D₂O Using Experiments Performed with the New IPEN/MB-01 Setup. In Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025. American Nuclear Society. 2025. p. 222-230. (Proceedings of the Nuclear Criticality Safety Division 2025 Conference, NCSD 2025). doi: 10.13182/NCSD25-47964