Stephen M. Bowman
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View article: Overview of the Recent BWR Burnup Credit Project at Oak Ridge National Laboratory
Overview of the Recent BWR Burnup Credit Project at Oak Ridge National Laboratory Open
Oak Ridge National Laboratory (ORNL) and the US Nuclear Regulatory Commission (NRC) have completed a five-year program to investigate burnup credit (BUC) for boiling-water reactor (BWR) spent nuclear fuel (SNF) stored in storage and transp…
View article: Development of Criticality Safety Validation Guidance for NRC-Regulated Activities
Development of Criticality Safety Validation Guidance for NRC-Regulated Activities Open
Some guidance documents support validation of criticality safety evaluations for many system types, and some accommodate different regulators or regulatory requirements. While these reports address specific applications, no single document…
View article: Impact of Assembly-Specific Conditions on BWR Burnup Credit
Impact of Assembly-Specific Conditions on BWR Burnup Credit Open
Because boiling water reactors use control blades during operation, there can be significant changes to the local axial power shape, coolant density profile, and other parameters when the blades are inserted. Previous work examined the rea…
View article: SCALE 6.2 REACTOR PHYSICS CODE ACCURACY ASSESMENT FOR LIGHT WATER REACTOR FUEL
SCALE 6.2 REACTOR PHYSICS CODE ACCURACY ASSESMENT FOR LIGHT WATER REACTOR FUEL Open
Verification and validation results of the SCALE 6.2 lattice physics codes TRITON/NEWT and Polaris are presented. The SCALE/KENO continuous energy Monte-Carlo code is used as a reference to compare results of more than 2,000 combinations o…
View article: Using a severity threshold to improve occupational injury surveillance: Assessment of a severe traumatic injury‐based occupational health indicator across the International Classification of Diseases lexicon transition
Using a severity threshold to improve occupational injury surveillance: Assessment of a severe traumatic injury‐based occupational health indicator across the International Classification of Diseases lexicon transition Open
Background Traumatic injury is a leading cause of death and disability among US workers. Severe injuries are less subject to systematic ascertainment bias related to factors such as reporting barriers, inpatient admission criteria, and wor…
View article: Outcomes of trauma patients on chronic antithrombotic therapies in a trauma center in a rural state
Outcomes of trauma patients on chronic antithrombotic therapies in a trauma center in a rural state Open
Blood product and reversal agent use was similar between patients on warfarin, DOACs, or antiplatelet agents. Patients on antiplatelet agents had a shorter ICU stay than the warfarin group, the only significant difference observed. Our res…
View article: 3rd High-Performance Computing Security Workshop :
3rd High-Performance Computing Security Workshop : Open
High-performance computing (HPC) is a vital computational infrastructure for processing large data volumes, performing complex simulations, and conducting advanced machine learning model training. As such, HPC is a critical component of sc…
View article: The Reactivity Effects of Nuclide Buildup and Decay During Long-Term Fuel Storage
The Reactivity Effects of Nuclide Buildup and Decay During Long-Term Fuel Storage Open
This paper presents the results of an analysis of spent fuel reactivity over a 100,000-year cooling time. The goal of this work was to study the changes in reactivity and to recognize which nuclides contribute to such changes. The analysis…
View article: New Enhancements to SCALE for Criticality Safety Analysis
New Enhancements to SCALE for Criticality Safety Analysis Open
As the speed, available memory, and reliability of computer hardware increases and the cost decreases, the complexity and usability of computer software will increase, taking advantage of the new hardware capabilities. Computer programs to…
View article: SCALE 6.2 Lattice Physics Performance Assessment
SCALE 6.2 Lattice Physics Performance Assessment Open
The US Nuclear Regulatory Commission relies on the lattice physics analysis capabilities of the SCALE code system to perform confirmatory licensing analyses. Either SCALE lattice physics code—TRITON/NEWT or Polaris—can be used to generate …
View article: Increased Lengths of Stay, ICU, and Ventilator Days in Trauma Patients with Asymptomatic COVID-19 Infection
Increased Lengths of Stay, ICU, and Ventilator Days in Trauma Patients with Asymptomatic COVID-19 Infection Open
Background The SARS-Cov-2 coronavirus has varying clinical effects—from asymptomatic patients to life-threatening illness and death. At the only Level 1 Trauma Center in a rural state, outcomes appeared worse in trauma patients who tested …
View article: Development and Validation of a Controlled Vocabulary: An OWL Representation of Organizational Structures of Trauma Centers and Trauma Systems
Development and Validation of a Controlled Vocabulary: An OWL Representation of Organizational Structures of Trauma Centers and Trauma Systems Open
In trauma care and trauma care research there exists an implementation gap regarding a consistent controlled vocabulary to describe organizational aspects of trauma centers and trauma systems. This paper describes the development and evalu…
View article: Validation of k<sub>eff</sub> Calculations for Extended BWR Burnup Credit
Validation of k<sub>eff</sub> Calculations for Extended BWR Burnup Credit Open
The US Nuclear Regulatory Commission and consensus standards recommend validation of the numerical methods used in criticality safety analyses. This validation requires the comparison of computational results with measurements of physical …
View article: The Impact of Operating Parameters and Correlated Parameters for Extended BWR Burnup Credit
The Impact of Operating Parameters and Correlated Parameters for Extended BWR Burnup Credit Open
Applicants for certificates of compliance for spent nuclear fuel (SNF) transportation and dry storage systems perform analyses to demonstrate that these systems are adequately subcritical per the requirements of Title 10 of the Code of Fed…
View article: State Trauma Registries as a Resource for Occupational Injury Surveillance and Research
State Trauma Registries as a Resource for Occupational Injury Surveillance and Research Open
Objectives: Work-related traumatic injury is a leading cause of death and disability among US workers. Occupational injury surveillance is necessary for effective prevention planning and assessing progress toward Healthy People 2020 object…
View article: U.S. Commercial Spent Nuclear Fuel Assembly Characteristics - 1968-2013
U.S. Commercial Spent Nuclear Fuel Assembly Characteristics - 1968-2013 Open
Activities related to management of spent nuclear fuel (SNF) are increasing in the US and many other countries. Over 240,000 SNF assemblies have been discharged from US commercial reactors since the late 1960s. The enrichment and burnup of…
View article: Industrial Injury Hospitalizations Billed to Payers Other Than Workers' Compensation: Characteristics and Trends by State
Industrial Injury Hospitalizations Billed to Payers Other Than Workers' Compensation: Characteristics and Trends by State Open
Objective To describe characteristics of industrial injury hospitalizations, and to test the hypothesis that industrial injuries were increasingly billed to non‐workers' compensation ( WC ) payers over time. Data Sources Hospitalization da…
View article: Analysis of Key Safety Metrics of Thorium Utilization in LWRs
Analysis of Key Safety Metrics of Thorium Utilization in LWRs Open
Here, thorium has great potential to stretch nuclear fuel reserves because of its natural abundance and because it is possible to breed the 232Th isotope into a fissile fuel (233U). Various scenarios exist for utilization of thorium in the…
View article: ORIGAMI Automator Primer. Automated ORIGEN Source Terms and Spent Fuel Storage Pool Analysis
ORIGAMI Automator Primer. Automated ORIGEN Source Terms and Spent Fuel Storage Pool Analysis Open
Source terms and spent nuclear fuel (SNF) storage pool decay heat load analyses for operating nuclear power plants require a large number of Oak Ridge Isotope Generation and Depletion (ORIGEN) calculations. SNF source term calculations als…
View article: Improving occupational injury surveillance by using a severity threshold: development of a new occupational health indicator
Improving occupational injury surveillance by using a severity threshold: development of a new occupational health indicator Open
Background Hospital discharge data are used for occupational injury surveillance, but observed hospitalisation trends are affected by trends in healthcare practices and workers’ compensation coverage that may increasingly impair ascertainm…
View article: Technical Basis for Peak Reactivity Burnup Credit for BWR Spent Nuclear Fuel in Storage and Transportation Systems
Technical Basis for Peak Reactivity Burnup Credit for BWR Spent Nuclear Fuel in Storage and Transportation Systems Open
Oak Ridge National Laboratory and the United States Nuclear Regulatory Commission have initiated a multiyear project to investigate application of burnup credit for boiling-water reactor (BWR) fuel in storage and transportation casks. This…
View article: Extended Burnup Credit for BWR Spent Nuclear Fuel in Storage and Transportation Systems
Extended Burnup Credit for BWR Spent Nuclear Fuel in Storage and Transportation Systems Open
[Full Text] Oak Ridge National Laboratory and the United States Nuclear Regulatory Commission have initiated a multiyear project to investigate the application of burnup credit (BUC) for boiling-water reactor (BWR) fuel in storage and tran…
View article: Impact of modeling Choices on Inventory and In-Cask Criticality Calculations for Forsmark 3 BWR Spent Fuel
Impact of modeling Choices on Inventory and In-Cask Criticality Calculations for Forsmark 3 BWR Spent Fuel Open
Simulation of boiling water reactor (BWR) fuel depletion poses a challenge for nuclide inventory validation and nuclear criticality safety analyses. This challenge is due to the complex operating conditions and assembly design heterogeneit…
View article: Nonconvulsive seizures and status epilepticus in pediatric head trauma: A national survey
Nonconvulsive seizures and status epilepticus in pediatric head trauma: A national survey Open
Objectives: It remains uncertain whether nonconvulsive seizures and nonconvulsive status epilepticus in pediatric traumatic brain injury are deleterious to the brain and/or impact the recovery from injury. Consequently, optimal electroence…
View article: Coolant Density and Control Blade History Effects in Extended BWR Burnup Credit
Coolant Density and Control Blade History Effects in Extended BWR Burnup Credit Open
Oak Ridge National Laboratory and the US Nuclear Regulatory Commission have initiated a multiyear project to investigate the application of burnup credit (BUC) for boiling water reactor (BWR) fuel in storage and transportation casks. This …