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  • Article
  • Open Access
256 Views
13 Pages

AHP-Based Methodological Proposal for Identifying Suitable Sites for the Italian Near-Surface Repository

  • Giambattista Guidi,
  • Anna Carmela Violante and
  • Francesca Romana Macioce

26 September 2025

The selection of suitable sites for the disposal of radioactive waste constitutes a critical component of nuclear waste management. This study presents an original methodological proposal based on the Analytic Hierarchy Process (AHP), designed to sup...

  • Article
  • Open Access
529 Views
26 Pages

Preliminary Experimental Validation of Single-Phase Natural Circulation Loop Based on RELAP5-3D Code: Part I

  • Hossam H. Abdellatif,
  • Joshua Young,
  • David Arcilesi and
  • Richard Christensen

19 September 2025

The molten salt reactor (MSR) is a prominent Generation IV nuclear reactor concept that offers substantial advantages over conventional solid-fueled systems, including enhanced fuel utilization, inherent passive safety features, and significant reduc...

  • Article
  • Open Access
434 Views
29 Pages

Initiating Event Frequencies for Internal Flooding and High-Energy Line Break PRAs

  • Karl N. Fleming,
  • Bengt O. Y. Lydell,
  • Mary Presley,
  • Ali Mosleh and
  • Wadie Chalgham

16 September 2025

Utilities that operate nuclear power plants are increasingly using probabilistic risk assessments (PRAs) to make day-to-day decisions on design, operations, and maintenance and to support risk-informed applications. These applications require high-qu...

  • Review
  • Open Access
479 Views
17 Pages

Assessment of Volatile Radionuclide Release in the ALFRED Lead-Cooled Fast Reactor

  • Ana Ivan,
  • Mariano Tarantino,
  • Mărioara Abrudeanu,
  • Daniela Diaconu and
  • Daniela Gugiu

13 September 2025

This study reviews the release potential of volatile radionuclides in the ALFRED reactor, providing data for source-term evaluations under both normal and postulated accident conditions. Using empirical Henry’s law relations and radionuclide in...

  • Article
  • Open Access
577 Views
12 Pages

1 September 2025

In probabilistic risk assessment (PRA), the fracture limit of fuel cladding tubes under loss-of-coolant accident conditions plays a critical role in determining the core damage, highlighting the need for accurate modeling of cladding tube fracture be...

  • Article
  • Open Access
625 Views
22 Pages

20 August 2025

The HYPEX® process is a novel method for conditioning spent ion exchange resins from nuclear power plants, aiming to reduce final waste volume and carbon emissions by stabilizing the resins in metakaolin-based geopolymers. This study addresses th...

  • Article
  • Open Access
725 Views
20 Pages

Feasibility of an Active Interrogation System to Classify Waste with He-4 Neutron Spectroscopy

  • Andrew Politz,
  • Paolo Tancioni,
  • Oskar Searfus,
  • Eric Aboud,
  • Kelly Jordan and
  • Daniel Siefman

18 August 2025

This work investigates a 4He-detector active interrogation system that leverages neutron spectroscopy to classify nuclear waste streams. MCNP models tested the concept through the simulation of a D-D neutron generator, an array of 4He detectors, and...

  • Article
  • Open Access
536 Views
16 Pages

Validation of the New TLANESY Thermal–Hydraulic Code with Data from the QUENCH-01 Experiment

  • Nahum Contreras-Pérez,
  • Heriberto Sánchez-Mora,
  • Sergio Quezada-García,
  • Armando Miguel Gómez Torres and
  • Ricardo Isaac Cázares Ramírez

12 August 2025

Hydrogen generation and the correct simulation of severe accidents have been of utmost importance since the Fukushima Dai-ichi accident. QUENCH experiments are quite useful for validating mathematical models implemented in system codes for early-phas...

  • Article
  • Open Access
586 Views
13 Pages

Applying Machine Learning Algorithms to Classify Digitized Special Nuclear Material Obtained from Scintillation Detectors

  • Sai Kiran Kokkiligadda,
  • Cathleen Barker,
  • Emily Gunger,
  • Jalen Johnson,
  • Brice Turner and
  • Andreas Enqvist

11 August 2025

The capability to discriminate among nuclear fuel properties is essential for a successful nuclear safeguard and security program. Accurate nuclear material identification is hindered due to challenges such as differing levels of enrichments, weak ra...

  • Article
  • Open Access
614 Views
16 Pages

The results of a recently developed Serpent 2 model of the Oregon State TRIGA® Reactor (OSTR) are compared to the results from the OSTR MCNP® model and measured values for reactor steady state behavior. This benchmark comparison is performed...