Certificate Icon Certified by the American Board of Health Physics | Registered to Practice in California & Several Other States
Minority and woman-owned small business providing services in shielding design and radiation safety aspects of medical, industrial and research facilities

Nisy Elizabeth Ipe, Ph.D., C.H.P.

Phone Icon (650) 631-1916

Hours of Operation
Monday-Friday, 7 a.m.-9 p.m.


Exceptional Radiation Shielding Design

I have over 30 years of experience in shielding design and radiation safety of medical, industrial and research facilities. I have successfully executed numerous shielding designs both nationally and internationally. My “one-stop shielding design" services ensure my participation in all phases of the project: schematic design, design development, construction documentation and inspection; and shielding integrity radiation surveys. I am an expert in electron, photon, neutron and proton shielding. I was a consultant on NCRP Report No. 151, “Structural Shielding Design and Evaluation for Megavoltage X- and Gamma Ray Radiotherapy Facilities. I was the Task Group Chair for the Particle Therapy Cooperative Group (PTCOG) Report 1: Shielding and Radiation Safety for Charged Particle Therapy Facilities. I have written chapters on shielding in the books “Proton Therapy Physics” and “Principles and Practice of Proton Beam Therapy”. I have given talks and taught shielding courses at AAPM summer schools, HPS Meetings, PTCOG Educational Workshops and various other national and international conferences.

I am very experienced at working with architects, contractors and project managers. I insist that architectural drawings are correct, and reviews and signs off on relevant construction documents and submittals. I am very responsive and provide a quick turnaround time on projects. I provide a comprehensive physicist's report for submission to the state or other relevant regulatory agency. My early involvement guarantees the implementation of cost effective shielding solutions, and a facility constructed per design. My careful attention to detail eliminates costly mistakes and retrofits. In addition to my strong communication, foresight, and facilitation skills, my availability to interact with the architect, contractor and regulatory agency relieves the client of additional responsibility during the various stages of the project.

Radiation protection & shielding Design services Available Nationally and Internationally

Medical Facilites:

  • Proton and Particle Therapy
  • Therapy Linear Accelerators (LINAC)
  • High Dose Rate Brachytherapy
  • Medical Cyclotrons
  • Nuclear Medicine
  • Positron Emission Tomography (PET)
  • Computer Tomography (CT)
  • Radiographic, Fluoroscopic, and Interventional Installations
  • Dental, Mammographic, and Bone Mineral Density Installations
  • Veterinary X-ray Installations

Industrial Facilities:

  • Radioactive Sources
  • Neutron Generators
  • Ion Implantation
  • Industrial Radiation and X-ray Sources
  • Imaging Systems
  • Airport, Cargo, and Border Security Inspection Systems
  • Radiation Sterilization and Processing

Research Facilites:

  • Particle Accelerators and Storage Rings
  • Synchrotron Radiation and Light Sources
  • Free Electron Laser (FEL)
  • Radio Frequency Devices

Other Services:

  • Monte Carlo Calculations
  • Activation Calculations
  • Structural Shielding Integrity Radiation Surveys (Photons and Neutrons)
  • Photon and Neutron Dosimetry
  • Radiation Protection Program and Plan
  • Regulatory Compliance and Licensing
  • Radiation Safety Manual and Training
  • Expert Witness
  • Tutorials on Radiation Protection and Shielding