Nuclear Data Week 2025

6 Jan 2026, 08:00 → 9 Jan 2026, 18:00 US/Eastern

Building 555, Hamilton Conference Room

Catherine-Anne Dunn, David Brown (NNDC-BNL), Gustavo Nobre (BNL)

Nuclear Data Week has been rescheduled to 6-9 January 2026

 

The November 2025 Nuclear Data Week is postponed to the first week of January 2026  

• CSEWG - Tuesday - Friday 
• WANDA 2026 Planning - cancelled
• NCSP NDAG - Tuesday AM
  
  

Non-U.S. citizens must complete an additional Brookhaven Lab Guest Form and be approved in the Guest Information System (GIS) if they would like to attend this meeting. This applies to both in-person and remote attendees!

For in-person events, it is advisable not to make travel arrangements until you are approved in the Guest Information System.

If you have a current Brookhaven Lab guest appointment and a valid BNL Guest Number or you have a pending Guest Registration (GR) Number, it is not necessary to complete the additional Brookhaven Lab Guest Form again.

Registration Deadlines:

• US citizens: December 15, 2025
• non-US citizens: December 5, 2025

 

Tuesday 6 January

09:00 → 11:00 NDAG

11:00 → 12:30 Analytical Methods Working Group: AMWG

12:30 → 13:30 Lunch

13:30 → 13:35 Welcome

Speakers: David Brown (NNDC-BNL), Dr Martin Schoonen (BNL)

13:35 → 13:45 CSEWG 101

Speaker: David Brown (NNDC-BNL)

13:45 → 14:00 ENDF Library Update

Speaker: Gustavo Nobre (BNL)

14:00 → 16:20 Evaluation: Fission Products Yields and Decay Data

14:00 Update on the FY compilation effort at BNL

Speaker: Andrea Mattera (BNL)

14:20 TBD

Speaker: Alejandro Sonzogni (NNDC - BNL)

14:40 TBD

Speaker: Amy Lovell (Los Alamos National Laboratory)

15:00 Break

15:20 Updating GEANIE Experimental Data by Evaluated Fission Product Yields, and Los Alamos CoH-based Evaluation (LACE) Framework

Speaker: Toshihiko Kawano (Los Alamos National Laboratory)

15:40 LLNL FPY Modeling and Evaluation

Speakers: Ramona Vogt, Ramona Vogt (LLNL and UC Davis)

16:00 Fission product yield data for basic physics research and applications

Speaker: Anton Tonchev (LLNL)

Wednesday 7 January

08:00 → 12:00 Formats and Processing

08:00 Energy dependent fission yield covariance

Speaker: Wim Haeck (LANL)

08:10 Disallowing interpolation on the current fission product yield data

Speaker: Wim Haeck (LANL)

08:20 Standardisation of reaction identifiers for GNDS and linking to ENDF MT nomenclature.

Speaker: Wim Haeck (LANL)

08:30 TSL Format discussions

Speaker: Chris Chapman (Oak Ridge National Laboratory)

08:40 Depletion Data (or the Lack Thereof) in ENDF Data Files

Speaker: Charles Wemple (Studsvik Scandpower Inc.)

08:50 Minor ENDF manual changes

Speakers: David Brown (NNDC-BNL), Dorothea Wiarda (ORNL), Gustavo Nobre (BNL)

09:00 File 32/File 33 covariance mixing

Speakers: Dorothea Wiarda (ORNL), Jordan McDonnell (UT-Battelle), Dr Marco Pigni (ORNL)

09:10 Unifying the ENDF free text documentation formats

Speaker: David Brown (NNDC-BNL)

09:20 NJOY

Speaker: Wim Haeck (LANL)

09:40 AMPX

Speaker: Jordan McDonnell (UT-Battelle)

10:00 Break

10:20 FUDGE

Speaker: Caleb Mattoon (Lawrence Livermore National Lab)

10:40 NDEX

Speaker: Jason Thompson (NNL-KAPL)

11:00 ADVANCE

Speaker: Coles Rebecca (BNL)

11:20 SAMMY

Speaker: Dorothea Wiarda (ORNL)

11:40 GNDS Updates

Speaker: Caleb Mattoon (Lawrence Livermore National Lab)

12:00 → 13:30 Lunch

13:30 → 17:35 Measurements

13:30 Measurements with DICER at LANSCE

Speaker: Thanos Stamatopoulos (Los Alamos National Laboratory)

13:45 Update on Recent Cl-35(n,p) LENZ Measurements into the RRR

Speaker: Kenneth Hanselman (LANL)

14:00 Recent measurements of 235U, 238U, 239Pu, and 240Pu photofission cross sections in the region of the Giant Dipole Resonance

Speaker: Anton Tonchev (LLNL)

14:20 Thermal Transmission measurements

Speaker: Dr Kemal Ramic (Oak Ridge National Lab)

14:35 Recent Work on Neutron Standards

Speaker: Allan Carlson (NIST)

14:55 Recent Zr-88 and Xe-135 measurements

Speaker: Will Flanagan (UT)

15:10 Break

15:25 Hafnium High-Energy Quasi Differential Scattering

Speaker: Adam Daskalakis (Naval Nuclear Laboratory)

15:45 Zr measurements at GELINA

Speaker: Klaus Guber (Oak Ridge National Laboratory)

16:00 Nuclear Data measurements at RPI

Speaker: Yaron Danon (Rensselaer Polytechnic Institute)

16:20 Recent Results from GENESIS

Speakers: Bethany Goldblum (Lawrence Berkeley National Laboratory), Thibault Laplace (University of California Berkeley)

16:40 The present status of the EXFOR project

Speaker: Boris Pritychenko (NNDC, BNL)

16:55 Thermal scattering measurements from graphite

Speaker: Dr Kemal Ramic (Oak Ridge National Lab)

17:10 Nuclear data measurements of Ni and Cr capture gamma-rays

Speaker: Shuya Ota (Brookhaven National Laboratory)

17:25 Mn, Cu, Fe capture gammas at thermal

Speaker: Marian Jandel (University of Massachusetts, Lowell, MA)

Thursday 8 January

08:00 → 12:00 Covariances

08:00 Introduction

Speaker: Denise Neudecker (Los Alamos National Laboratory, Theoretical Division)

08:02 TBD (Ta181 Covariance)

Speaker: jesson hutchinson (LANL)

08:17 TBD (Standards)

Speaker: Georg Schnabel (IAEA)

08:32 Using ML to find root causes for discrepancies in experimental data underlying the new 252Cf PFNS Standard

Speaker: Denise Neudecker (Los Alamos National Laboratory, Theoretical Division)

08:47 TBD (model UQ RRR)

Speaker: Vladimir Sobes (University of Tennessee)

09:02 TBD (exp. UQ and eval. in the URR)

Speakers: Cole Fritsch (UTK), Noah Walton (LANL)

09:17 Bayesian Model Mixing and the Bayesian Analysis of Nuclear Dynamics (BAND) Software Framework

Speaker: Daniel Philips (U. Ohio)

09:32 The BAND approach to optical potentials

Speaker: Kyle Beyer (University of Michigan)

09:47 Break

09:57 Covariances for the LLNL Pu239 Evaluation

Speaker: Andre Sieverding (LLNL)

10:12 Adjustment of Pu239 Evaluation Using Bayesian Inference

Speaker: Marc Salinas

10:27 TBD (AI/ML for photo-induced eval.)

Speakers: Ajeeta Khatiwada (LANL), Ajeeta Khatiwada (LANL)

10:42 TBD (photo-induced eval. and cov.)

Speaker: Noah Walton (LANL)

10:57 TBD (inventory studies using cov.)

Speaker: Friederike Bostelmann (Oak Ridge National Laboratory)

11:12 Gaussian Mixture Models (GMM) for data and covariance evaluations: a phonon density of states case study

Speaker: Goran Arbanas (Oak Ridge National Laboratory)

11:27 TBD (TSL cov.)

Speaker: Chris Chapman (Oak Ridge National Laboratory)

11:42 TBD (FPY cov.)

Speaker: Amanda Lewis (LANL)

12:00 → 12:20 Group photo

12:20 → 13:30 Executive Committee Meeting

12:20 → 13:30 Lunch

13:30 → 17:30 Evaluation: Evaluation (Neutrons)

Friday 9 January

08:00 → 12:00 Validation

08:00 Welcome

Speakers: Michael Zerkle (Bettis Atomic Power Laboratory), Dr Michael Zerkle (Naval Nuclear Laboratory)

08:05 LANL Validation Results of Recently Released Libraries

Speaker: Noah Kleedtke (LANL)

08:20 NNL Validation Testing

Speaker: Linden Cotchen (NNL)

08:35 MC21 Testing of the ENDF/B-VIII.1 Graphite TSLs in the ORELA PNSDT Benchmark

Speakers: Jason Thompson (NNL-KAPL), Jason Thompson (NNL)

08:50 ORNL Validation Testing

Speaker: Travis Greene (ORNL)

09:05 LLNL Testing of ENDF/B-VIII.1 with the COG Validation Suite

Speaker: Jesse Norris (Lawrence Livermore National Laboratory)

09:25 AWE Validation Testing

Speaker: Mark Cornock (AWE.Plc)

09:40 Nuclear Data Testing at Studsvik Scandpower

Speaker: Charles Wemple (Studsvik Scandpower Inc.)

09:55 Update on New ICSBEP Evaluations

Speaker: Catherine Percher (Lawrence Livermore National Laboratory)

10:15 Break

10:30 Data Testing of ENDF/B-VIII.2 Beta Chlorine with ICSBEP

Speaker: Eric Aboud (LLNL)

10:45 Source Modelling in the LLNL Pulsed Spheres

Speaker: Tim Gaines (AWE Plc)

11:05 Benchmarking and Validation of Gamma-Producing Nuclear Data For Well Logging

Speaker: Bor Kos (Baker Hughes)

11:25 Potential for Validation Data from Radioisotope Production at ORNL

Speaker: William Marshall (Oak Ridge National Laboratory)

11:45 First Look at use of PARADIGM for ND Validation

Speaker: Peter Brain (LANL)

12:00 → 13:00 Lunch

13:00 → 15:00 Special Topic: Inventory Library

13:00 Welcome

Speaker: Andre Sieverding (LLNL)

13:05 Activation Library Use in Target Design and Analysis for Radioisotope Production at ORNL

Speaker: William Marshall (Oak Ridge National Laboratory)

13:20 Nuclear data needs for activation in inertial confinement fusion

13:35 Impact of cross section and fission yield uncertainties on fuel inventory for a molten salt fast reactors

Speaker: Germina Procop (ORNL)

13:55 Nuclide inventory validation: effect of nuclear data libraries

Speaker: Germina Procop (ORNL)

14:10 Reaction theory developments at LANL

Speaker: Amy Lovell (Los Alamos National Laboratory)

14:25 Reaction theory and workflow developments at LLNL

14:40 Discussion

15:00 → 15:15 Break