Radiation Protection Technologist V4.0

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RPTprep Version 4.0  is an interactive software program consisting of a database of questions, answers, and explanations that together comprise a system for exam preparation.   The Program contains two modules “Study Session” and “Practice Test” to help users most efficiently focus their exam preparation.  Learn more about our program features:

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Program licenses are available in 60 – 365 day options.   You select the time period that works best with your study plans.  Pricing and time options can be reviewed by clicking the “Order Now” or “See Pricing” button

We are confident you will find our exam preparation materials are a valuable aid in studying for your certification, and we back that up with a money back or no-charge extra time offer.



Certification Exam:  The software is designed to prepare the user for the Radiation Protection Technologist Certification exam offered by the National Registry of Radiation Protection Technologists (NRRPT).  

Program Name:   RPTprep Version 4.0

Year Created:  2000

Last modified:   September 2013

Upcoming Modifications:  2020

Number of Questions:    1001

Exam Prep Outline:

RPTprep Version 4.0 is an interactive software program consisting of a database of questions, answers, and explanations that together comprise a system for exam preparation.  The database has 1000 questions in 3 main topic areas.  The 3 main topics are as follows:


  • Fundamentals of Radiation Protection
  • Detection and Measurements
  • Applied Radiation Protection



Author:  Dr. Thomas E. Johnson

The content expert and current author for the RPTprep is Dr. Thomas E. Johnson, who has over 25 years of experience in the nuclear industry, specializing in radiation and laser safety. Dr. Johnson is currently an Associate Professor in Health Physics at Colorado State University.

He has conducted multiple CHP and NRRPT review classes over the past 15 years, and currently is responsible for multiple classes in the Colorado State University’s Health Physics program. Over one-third of those passing the CHP exam over the past 5 years have attended preparation courses developed by Dr. Johnson.

Dr. Johnson has a PhD in Health Physics from Purdue University and is the co-author of “Introduction to Health Physics 4th edition” as well as “The Radiological Health Handbook 4th edition” and “The Health Physics Solutions Manual”. He holds Comprehensive Certification (CHP) from the ABHP, is registered with the NRRPT, and is a Certified Laser Safety Officer.


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