NRC Nuclear Power Plant Operator License Practice Test
Build your confidence for NRC Nuclear Power Plant Operator License. Practice the concepts, understand the answers, and strengthen your knowledge one question at a time.
Try a sample questionExam overview and details
NRC licensing examination for nuclear power plant operators covering reactor physics, plant systems, emergency procedures, and nuclear safety regulations. Administered by US Nuclear Regulatory Commission. Key domains include administrative requirements, components, nuclear power plant systems and procedures.
Sample Questions
Choose an answer and explore the explanation to see how practice works.
During the night shift at Unit 1, operators are responding to containment sump switchover after LOCA. Indications include refueling water storage tank level is near the transfer setpoint and low-head injection is running. Which action is the best next priority?
During the backshift shift at Unit 2, operators are responding to emergency diesel fuel oil. Indications include day tank level is low, transfer pump is in auto, and the storage tank level is adequate. Which action is the best next priority?
During the backshift shift at Unit 1, operators are responding to auxiliary feedwater. Indications include the turbine-driven AFW pump is running, steam supply pressure is adequate, and discharge pressure is low due to a recirculation valve left open. Which action is the best next priority?
During the day shift at Unit 1, a shift turnover occurs during an abnormal procedure. Which operator action best preserves licensed control of the plant?
During the night shift at Unit 1, operators are responding to post-accident sampling. Indications include containment dose rates are high and chemistry requests a sample that requires local valve manipulation. Which action is the best next priority?
Exam insights and study advice
This license is the cornerstone of nuclear safety in the United States. The operators who hold it are directly responsible for the safe, stable, and efficient production of approximately 20% of the nation's electricity. Their decisions have immediate, real-world consequences for public safety, environmental protection, and grid reliability. The exam's rigor ensures that only individuals with proven technical competence and unwavering procedural discipline are entrusted with the control of a nuclear reactor, thereby upholding the industry's paramount commitment to preventing accidents and protecting communities.
What this exam covers
01administrative requirements
This domain addresses regulatory standards, shift clearance, tagout regulations, work authorization, radiation safety controls, and reporting requirements. Operators must comply with 10 CFR Part 55 rules and facility administrative guidelines during daily operations.
02components
This domain focuses on mechanical and electrical components used in power facilities, such as valves, pumps, motors, instrumentation, and circuit breakers. Operators must understand component construction, operational indications, control logic, and failure modes.
03nuclear power plant systems
This domain covers integrated plant systems including primary cooling, emergency core cooling, secondary steam supply, and electrical distribution. Operators must know system interlocks, flow paths, automatic actions, and control room indications across operating states.
04procedures
This domain focuses on normal, abnormal, and emergency operating procedures. Operators must follow step-by-step instructions for power maneuvers, system lineups, alarm response, transient mitigation, and emergency declarations to maintain safety boundaries.
05reactor theory
This domain covers core physics concepts, neutron multiplication, reactivity changes, and control rod worth. Operators must understand principles governing nuclear fission, reactor startup, steady-state operation, and power changes within the reactor vessel during operational conditions.
06thermodynamics
This domain addresses fluid flow, heat transfer, steam tables, and thermodynamic cycles applicable to nuclear power plants. Operators must analyze temperature dynamics, enthalpy changes, phase transitions, and heat exchanger performance to maintain proper thermal limits.