Chemical Modeling

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Jan Bostelman has over 35 years of experience in the area of materials/chemical modeling, and evaluations. She holds a degree in chemical engineering with minor in chemistry. She then completed graduate work in metallurgical engineering with emphasis on corrosion and materials testing.

She subsequently has worked with various aspects of chemical modeling and how it relates to nuclear operations, i.e. chemical spills, releases, generation and post-accident assessments. She is proficient in understanding of RG 1.78, RG 1.95, EPA guidelines related to chemical modeling and assessment, screening and control. She also is very proficient with the use of the NIOSH guidelines for chemicals and the potential impact from releases. She worked on several utility evaluations related to storage of chemicals near nuclear facilities, including transportation, pipeline and barge releases. She successfully worked with chemical release evaluations utilizing probabilistic risk approaches for scenarios with facilities located near nuclear stations.

Her expertise includes conducting surveys of chemicals on site, evaluating generation of chemicals as well and their impact (i.e. hydrogen), and chemical spills. She also worked with bioremediation of chemically contaminated ground water in New Mexico. This required designing a five-point injection well system for remediating the chemicals released to the ground water. She has extensive background in chemical modeling of containment sump interactions post-accident since 1998.

She also has experience with atmospheric modeling tools such as ARCON96, PAVAN, and standard Pasquill Gifford models. The ARCON96 and PAVAN outputs are utilized for radiation dose modeling and discussed in that area.

Areas of Focus

  • Toxic gas releases and impact to plant operators
  • NIOSH guidelines
  • Chemical spill releases and impact to plant operators
  • Hydrogen generation and explosion combinations
  • GSI 191 chemical interactions sump water
  • Hydrogen generation post-accident (radiolysis, fuel clad)
  • Hydrogen generation for BWR injection methods and storage


  • 35 years’ experience working with chemical release modeling in nuclear industry.
  • Utilization of EPA, NRC and industry computer codes.

Code Experiences

  • HABIT: NRC code for chemical modeling TOXIC -EPA code for chemical modeling
  • ALOHA: EPA code for chemical modeling
  • PHREEQC: code for groundwater chemical modeling
  • ARCON96: code for generating atmospheric dispersion coefficients for control rooms
  • PAVAN: code for generating atmospheric dispersion coefficients for offsite boundaries

Previous Relevant Projects

Project: Toxic Gas Analysis

Tasks Completed: Evaluate Installation of Grain Ethanol Processing Plant Location to station relevant for toxic gas impacts to control room operators; Completed analyses of all potential toxic gas materials that could be released within proximity of plant.

Evaluate hydrogen generation from various materials post accident related to potential release requirements.

Notes: required extensive interface with NRC, and also utilized probabilistic methods for plume dispersion of toxic gas clouds.

Project: Analysis and Technical Specification Amendment

Tasks Completed: Evaluate all potential toxic chemical materials that could be transported or stored near the station. Evaluate if any existing toxic gas monitors could be removed from facility. The result of this assessment was that the NRC concurred that all existing toxic gas monitors could be removed with exception of ammonia monitor from the control room. This assessment utilized the TOXIC code for assessment of chemical concentration buildup in the control room from a potential release

Project: Analysis at Commercial Nuclear Unit*

Tasks Completed: Conduct detailed evaluation of all potential toxic materials within vicinity of a station. Completed assessment of nearby chemical and petrochemical factories and impact to nuclear facility.

Project: Analysis at Commercial Nuclear Unit*

Tasks Completed: Conduct detailed evaluation of all potential toxic materials within vicinity of station. Completed assessment using HABIT code.

Project: Analysis and Inspections at Commercial Nuclear Unit*

Tasks Completed: Conduct detailed inspections, transportation routes of potential hazardous chemical materials located near a facility. Also perform analysis of those materials that could not be screened out with no impact to control room operators. Completed assignment using HABIT code, and with interface between state agencies.

Project: Analysis at Commercial Nuclear Unit*

Tasks Completed: Evaluate impact of temporarily storing large amounts of potential toxic gas materials at site. Result indicated large volumes of gas could be stored temporarily on site without impact to site station operators.

Project: Ground Water Remediation at the University of New Mexico

Tasks Completed: Design five-point injection well system to mitigate high levels of nitrates in ground water. Utilized PHREEQC for modelling of injection with feedstock material.

*Further details can be provided by contacting us