NTN REACT study materials
NTN REACT study resources

NTN REACT study plan

NTN REACT · Give each week a clear focus.

8 weeks · About 7 hours per week

Week 1

Reactor Theory and Nuclear Physics

  • Derive and explain the six-factor formula and each factor's physical meaning, writing the derivation from memory without notes

  • Sketch a neutron life cycle diagram and label leakage terms for both fast and thermal neutrons

  • Calculate k-effective, reactivity in dollars and pcm, and reactor period using the inhour relation for three worked problems

  • Explain prompt and delayed neutron fractions and why delayed neutrons set the achievable reactor period

Your checkpoint

A one-page handwritten formula sheet plus worked solutions to five reactivity and period calculations, self-graded against a textbook with all errors corrected

Week 2

Reactor Theory and Nuclear Physics

  • Describe the fission process, energy release distribution, and fission product inventory relevant to decay heat

  • Explain neutron moderation, macroscopic and microscopic cross sections, and the effect of temperature on resonance absorption

  • Compare reactivity feedback mechanisms including Doppler, moderator temperature, void, and power coefficient, stating sign and time scale for each

  • Solve point-kinetics problems for step and ramp reactivity insertions and interpret the resulting power response

Your checkpoint

A written 800-word comparison table and narrative of reactivity coefficients with sign, magnitude, and time constant for each, plus three solved kinetics problems

Week 3

Reactor Theory and Nuclear Physics & Reactor Operations and Control

  • Explain xenon-135 and samarium-149 production, burnout, and equilibrium behavior, and predict post-shutdown xenon peaking

  • Interpret a power defect curve and describe the startup, intermediate, and power ranges of reactor operation

  • Explain criticality approach methods including inverse multiplication and 1/M plots, and identify conditions that invalidate them

  • Describe rod worth, differential and integral worth curves, and the purpose of shutdown margin

Your checkpoint

A timeline diagram of xenon reactivity from shutdown through restart with annotated values, plus a solved 1/M extrapolation problem showing predicted critical loading

Week 4

Reactor Operations and Control

  • Describe the operator actions and indications for a reactor trip, turbine trip, and loss of feedwater heating

  • Explain manual and automatic control of rod position, boron concentration, and feedwater flow to hold power constant

  • Analyze a load-follow maneuver and identify which parameter drifts first and how it is corrected

  • Explain the purpose and operation of the reactor protection system and anticipated transient without scram response

Your checkpoint

A timed 60-minute practice set of 25 operations and control questions with a written explanation of every missed item

Week 5

Radiation Protection and Health Physics

  • Define absorbed dose, equivalent dose, effective dose, and committed dose, and convert between units including gray, sievert, rad, and rem

  • Calculate dose rate from a point source using the inverse square law and shielding attenuation, including buildup factor use

  • Explain ALARA, dose limits for workers and the public, and the difference between dose limits and action levels

  • Describe internal contamination pathways, bioassay, and the use of protective clothing and respiratory protection

Your checkpoint

A worked problem set of ten dose, shielding, and unit-conversion calculations with a summary card of dose limits and regulatory references

Week 6

Radiation Protection and Health Physics & Nuclear Safety and Emergency Procedures

  • Explain the bases of emergency action levels and the classification of unusual event, alert, site area emergency, and general emergency

  • Describe the purpose of emergency operating procedures and the transition from symptom-based to function-based response

  • Explain containment isolation, emergency core cooling system operation, and the key safety functions of reactivity control, core cooling, and fission product barrier integrity

  • Differentiate design basis accidents from beyond design basis events and explain defense in depth levels

Your checkpoint

A one-page decision flowchart mapping observable plant conditions to emergency classification levels, validated against three scenario descriptions

Week 7

Reactor Systems and Components & Instrumentation and Control

  • Describe the primary coolant loop, pressurizer, steam generator or once-through steam generator, and their control interactions

  • Explain the operation of major safety systems including residual heat removal, safety injection, and containment cooling

  • Describe key instrumentation including neutron detectors, resistance temperature detectors, pressure transmitters, and their redundancy and diversity

  • Explain setpoint, deadband, hysteresis, and the difference between indication and protection channels

Your checkpoint

An annotated system diagram of the primary and safety injection flow paths with a 15-item instrumentation and control question set answered and explained

Week 8

Regulatory Requirements and Documentation & Reactor Theory and Nuclear Physics & Reactor Operations and Control & Radiation Protection and Health Physics & Nuclear Safety and Emergency Procedures & Reactor Systems and Components & Instrumentation and Control

  • Summarize the regulatory framework covering licensing, technical specifications, and the role of the operating license and operator license

  • Explain the content and use of technical specifications including limiting conditions for operation and surveillance requirements

  • Complete two full-length timed practice exams under exam conditions and score them by domain

  • Build a remediation list from missed questions and close at least the top five gaps with targeted review

Your checkpoint

A domain-scored results table from two timed practice exams with a prioritized remediation list and evidence of completed review for the top five weak areas

Milestones

Week 2: Score at least 80 percent on a self-made 20-question reactor theory quiz and correctly solve three out of three point-kinetics problems without notes

Week 4: Explain aloud, in under ten minutes, the xenon transient, a 1/M criticality approach, and the response to a reactor trip, with no factual errors

Week 6: Correctly classify all three scenario descriptions in the emergency action level flowchart and score at least 75 percent on a mixed radiation protection and safety set

Week 8: Achieve at least 75 percent overall on both timed practice exams with no domain below 65 percent, and show a closed remediation list for the five weakest areas