ANS 2024 Winter Meeting

Orlando, FL, November 17-21, 2024

Program Description

Data, Analysis, and Operations in Nuclear Criticality Safety: I
Organizer: Benjamin Martin
Chair: Michael Cartwright (Y-12)
Alternate Chair: Benjamin Martin

Improved Solid Angle Formulas for use in Criticality Hand Calculations
Jeffrey A. Favorite (LANL)

Bias and Bias Uncertainty for High-Burnup and Extended Enrichment Fuels in Criticality Safety Analyses Validation Studies
A. Lang (ORNL), M.N. Dupont (ORNL), A.M. Shaw (ORNL), W.A. Metwally (ORNL), W.J. Marshall (ORNL), C. Celik (ORNL), V. Karriem (ORNL), L. Reed Fassino (ORNL)

What is a Criticality Safety Officer at Savannah River Site
Tracy E. Stover (Savannah River Nuclear Solutions)

CAAS Detectability and Source Term Considerations
Timothy Jackson (Y-12 National Security Complex)

Standardized Criticality Safety Limits in Decommissioning Support at Los Alamos
Trevor Stewart (LANL)

Interview with the Past to Better Inform the Future
Organizer: Kristin N. Stolte (LANL)
Chair: Kristin N. Stolte (LANL), James Cole (Sandia)
Alternate Chair: Deborah A. Hill

Knowledge transfer and preservation are key to a successful continuation of the nuclear criticality safety discipline. To facilitate this, we are interviewing several experienced and mid-career scientists in the field with questions from newer members. Questions include: what do you wish you knew at five years into the career; what was the most important thing you learned in your career; and would you do anything different if you got to do it again? We will also be soliciting questions from the audience.

Data, Analysis, and Operations in Nuclear Criticality Safety: II
Organizer: Benjamin Martin
Chair: James Rendell (U.K. National Nuclear Laboratory)
Alternate Chair: Amy E. van der Vyver

Recognizing Unrecognized Sources of Uncertainty (USU) in Nuclear Data
Jesse M. Brown (ORNL), Vladimir Sobes (Univ. Tennessee, Knoxville), Dorothea Wiarda (ORNL), Goran Arbanas (ORNL)

Correlated Sampling to Reduce the Uncertainty of Combinations of keff Sensitivities
Jeffrey A. Favorite (LANL)

Quantifying the Impact of Isotopically Dependent Fuel TSLs on LCT Systems in VALID
Chris W. Chapman (ORNL), William J. Marshall (ORNL)

Low Energy Light Output Measurement of EJ301D and D-Stilbene
C.A. Irvine (LANL), T.C. Borgwardt (LANL), R.A. Weldon Jr. (LANL)

Resolved Resonance Evaluation for 95Mo from Thermal to 5,000 eV
Luiz Leal (ORNL), Nicolas Leclaire (IRSN), Travis Greene (ORNL), Marco T. Pigni (ORNL), Klaus Guber (ORNL)

Critical and Subcritical Experiments: I
Organizer: Benjamin Martin
Chair: Catherine M. Percher
Alternate Chair: Theresa E. Cutler

The Prompt Fission Uranium Neutron Spectrum (PFUNS) Experiment: Critical Configurations and Irradiations
J. Hutchinson (LANL), T. Cutler (LANL), M. Gooden (LANL), T. Grove (LANL), J. Lee (LANL), D. Neudecker (LANL), R. Sanchez (LANL), N. Whitman (LANL), R. Weldon (LANL), N. Wynne (LANL)

Gamma Neutron Correlated Noise of the EUCLID Critical Experiment
Cole Kostelac (LANL), Robert Weldon (LANL), Jesson Hutchinson (LANL), Ayodeji Alajo (Missouri Univ. Science and Technology)

Chlorine Validation Through Critical Integral Experiments
Eric Aboud (LLNL), Allan Krass (LLNL), Ruby Araj (LLNL), Catherine Percher (LLNL), Daniel Siefman (LLNL), David Heinrichs (LLNL), Theresa Cutler (LANL)

Status of the CERBERUS Evaluation for the International Criticality Safety Benchmark Evaluation Project (ICSBEP) Handbook
Kelsey Amundson (LANL), Zachariah Lemke (LANL), Theresa Cutler (LANL)

Assessment of Measurement Uncertainties in the Jupiter High-240 Experiment
John D. Bess (JFoster & Assoc.), Alexander B. Brown (LANL), Joetta M. Goda (LANL), Jesson D. Hutchinson (LANL), Cole M. Kostelac (LANL), Geordie E. McKenzie (LANL), Alexander T. McSpaden (LANL), David C. Shepherd (LANL), Nicholas W. Thompson (LANL)

ANS-8 Standards Forum
Organizer: Douglas G. Bowen
Chair: Douglas G. Bowen
Alternate Chair: Kevin H. Reynolds

The ANS-8 Forum allows the Nuclear Criticality Safety (NCS) community to learn about the consensus standards that are under development and what kinds of work items are being considered by the ANS-8 Subcommittee. ANS-8 working groups will also provide discussions about working group tasks and opportunities for stakeholders and volunteers to learn more about ANS-8 standards. Students and early-career individuals interested in standards are welcome to participate.

Data, Analysis, and Operations in Nuclear Criticality Safety: III
Organizer: Benjamin Martin
Chair: Amy E. van der Vyver
Alternate Chair: Benjamin Martin

Safety Cases: Assumptions Versus Reality
James Rendell (National Nuclear Laboratory)

Functional Classification of Criticality Safety Controls at the Savannah River Plutonium Processing Facility
Brittany M. Williamson (Spectra Tech)

Investigating Hydrogen Thermal Scattering Law Data with Critical Benchmarks
T.M. Greene (ORNL), W.J. Marshall (ORNL), C.W. Chapman (ORNL)

Evaluation of Thermal Neutron Scattering Cross Section of α-U3O8 with Ab Initio Lattice Dynamics
Junhyoung Gil (NCSU), Ayman I. Hawari (NCSU)

An Approach to Obtaining the Best-Estimate keff for Uncertainty in ZPPR Plates
Veronica Karriem (ORNL), Douglas G. Bowen (ORNL)

Recent Nuclear Criticality Safety Program Technical Accomplishments
Organizer: Angela Chambers
Chair: Angela Chambers
Alternate Chair: Douglas G. Bowen

Design Evolution of a UO2-BeO Critical Experiment
William M. Cook (Sandia), Elijah Lutz (Sandia), David Ames (Sandia)

Sum-of-Fractions Method
Travis J. Zipperer (PNNL), Andrew W. Prichard (PNNL, Retired), Travis M. Greene (ORNL), William J. Marshall (ORNL), Alex Lang (ORNL)

The Completion of Surrogate Testing for Low-Temperature TEX and a Look Towards the Future
Eric Aboud (LLNL), Jacob Glesmann (LLNL), Jesse Norris (LLNL), Catherine Percher (LLNL), Nick Killingsworth (LLNL), Paul Yap-Chiongco (LLNL), Venkata Ravindra (National Nuclear Laboratory), Alfie O'Neill (National Nuclear Laboratory), Deborah Hill (National Nuclear Laboratory), Steve Graham (National Nuclear Laboratory)

SCALE Developments for the U.S. Nuclear Criticality Safety Program: Recent Achievements and Outlook
K.B. Bekar (ORNL), J. Brown (ORNL), C. Celik (ORNL), T. Greene (ORNL), S.W.D. Hart (ORNL), W.J. Marshall (ORNL), J.D. McDonnell (ORNL), U. Mertyurek (ORNL), S.E. Skutnik (ORNL), W.A. Wieselquist (ORNL)

IER 555: Status of Godiva-IV Benchmark (HEU-MET-FAST-086) Revision
Jeffrey A. Favorite (LANL), Joetta Goda (LANL)

Validation Efforts in NCS
Organizer: Theresa E. Cutler
Chair: Theresa E. Cutler
Alternate Chair: Amy E. van der Vyver

Burnup Credit Loading Curves for High-Burnup and Extended Enrichment Fuels
W.A. Metwally (ORNL), A. Lang (ORNL), V. Karriem (ORNL), M.N. Dupont (ORNL), W.J. Marshall (ORNL), C. Celik (ORNL), K.L. Fassino (ORNL), A.M. Shaw (ORNL)

Application of BUC for BWR Fuel in Final Disposal at SKB
Anna Alvestav (Swedish Nuclear Fuel and Waste Mgmt. Co.), Rasmus Renberg (Vattenfall Nuclear Fuel), Erik Dalborg (Vattenfall Nuclear Fuel), Per Zetterstrom (Vattenfall Nuclear Fuel), Jesper Kierkegaard (Vattenfall Nuclear Fuel), Fredrik Johansson (Swedish Nuclear Fuel and Waste Mgmt. Co.)

Development of Nuclear Data Measurements Capabilities at the Spallation Neutron Source
Kemal Ramic (ORNL), Luke Daemen (ORNL), Chris W. Chapman (ORNL), Jesse Brown (ORNL), Goran Arbanas (ORNL), Zain Karriem (ORNL), Antonio Moreira Dos Santos (ORNL), Jamie Molaison (ORNL), Klaus Guber (ORNL), Luiz Leal (ORNL)

Analysis of NCERC Critical Experiments with ENDF/B Nuclear Data Libraries
Peter Brain (LANL), Kelsey Amundson (LANL), Theresa Cutler (LANL), Noah Kleedtke (LANL), Alex McSpaden (LANL), Nick Thompson (LANL)

Data, Analysis, and Operations in Nuclear Criticality Safety: IV
Organizer: Benjamin Martin
Chair: Joshua Gogolski
Alternate Chair: Theresa E. Cutler

Calculation of Extended Subcritical Mass Limits in ANSI/ANS-8.1-2014
T.M. Greene (ORNL), D.G. Bowen (ORNL), G. Radulescu (ORNL)

Criticality Safety Validation Methods for Heat-Source Plutonium
James Suthon (Univ. New Mexico), Christopher Perfetti (Univ. New Mexico)

Lessons Learned in Drafting ANSI/ANS-8.28-2024, Administrative Practices for the Use of Nondestructive Assay Measurements for Nuclear Criticality Safety
Jeff Chapman (National Nuclear Security Administration), Ernest Elliott (BWX Technologies)

Exploration of Firefighting Techniques and how this Affects Criticality Safety Advice at Sellafield Ltd
David Kirkwood (Sellafield), Amy van der Vyver (Sellafield)

Investigation of Benchmark keff Sensitivity and Uncertainty for 239Pu Fission in Specific Energy Ranges
J. Hutchinson (LANL), K. Amundson (LANL), P. Brain (LANL), T. Cutler (LANL), N. Kleedtke (LANL), R. Little (LANL), D. Neudecker (LANL)

Critical and Subcritical Experiments: II
Organizer: Benjamin Martin
Chair: Mandy Bowles Tomaszewski
Alternate Chair: Theresa E. Cutler

Why the US Needs an Enduring Plutonium Critical Assembly
J. Hutchinson (LANL), C. Kostelac (LANL), R. Little (LANL), J. Marlow (LANL), J. McKamy (LANL), G. McMath (LANL), K. Stolte (LANL), G. McKenzie (LANL)

Importance of Higher Fidelity Model Geometries During Optimization of Critical Experiments
Peter Brain (LANL), Kelsey Amundson (LANL), Theresa Cutler (LANL), Jesson Hutchinson (LANL), Noah Kleedtke (LANL), Eric Williamson (LANL)

The PARADIGM Project: Case Study in Balancing Experiment Uncertainty with Design Simplicity
T. Cutler (LANL), K. Amundson (LANL), P. Brain (LANL), M. Devlin (LANL), N. Gibson (LANL), J. Hutchinson (LANL), N. Kleedtke (LANL), R. Little (LANL), D. Neudecker (LANL), E. Williamson (LANL)

Neutron Noise Analysis on Simulated Scatter-Based Detector List Mode Data for Subcritical MUSiC Configurations Using MCNP6.3 PTRAC
Luke Oukrop (LANL), Robert Weldon (LANL), Travis Grove (LANL), Jesson Hutchinson (LANL), Rene Sanchez (LANL), Geordie McKenzie (LANL), Alexander McSpaden (LANL)

Preliminary Benchmark Uncertainties for Deimos, a HALEU-Fueled and Graphite-Moderated Advanced Reactor Testbed
Peter Brain (LANL), Theresa Cutler (LANL), Kristin Stolte (LANL)