Junior Operator Grade I study materials
Junior Operator Grade I study resources

Junior Operator Grade I study plan

Junior Operator Grade I · Give each week a clear focus.

8 weeks · About 7 hours per week

Week 1

Plant systems, components, and instrumentation

  • Draw from memory a one-page block diagram of the primary and secondary heat transport loops, labeling major pumps, valves, heat exchangers, and the turbine-generator train.

  • Map each labeled component to its safety function and to the instrumentation (level, pressure, flow, temperature) that monitors it.

  • Define the four common instrument loop elements (sensor, transmitter, controller, final element) and explain what a failed-open versus failed-closed signal does to each loop you mapped.

  • Build a personal glossary of 40 plant-system terms with a one-line definition each, using only your own wording.

Your checkpoint

A hand-drawn system map plus a 40-term glossary, self-quizzed to at least 85% recall the next day.

Week 2

Plant systems, components, and instrumentation & Plant operations and normal procedures

  • Trace a normal startup sequence from cold shutdown to full power, writing the key parameter band (pressure, temperature, level, flow) that must be met before each step is allowed to proceed.

  • Trace a normal shutdown sequence and list the hold points where a supervisor or procedure signature is required.

  • Compare your startup and shutdown traces against the plant's operating-procedure structure and mark every step you got wrong or omitted.

  • Explain how at least five interlocks or permissives protect the startup sequence, and describe the consequence of defeating each one.

Your checkpoint

A two-column startup/shutdown comparison table with parameter bands and a marked-up list of your own errors.

Week 3

Plant operations and normal procedures & Abnormal and emergency operations

  • Write a normal-operations checklist covering rounds, log-taking, and surveillance that a new operator could follow without asking questions.

  • Classify at least 15 abnormal events into a severity ladder (upset, alert, emergency) and justify each classification using a defined criterion, not intuition.

  • For each of the five most probable abnormal events, write the first three immediate operator actions and the parameter that confirms the action worked.

  • Rehearse one abnormal scenario under time pressure and log your decision time and any hesitation points.

Your checkpoint

A one-page abnormal-event response card covering five scenarios, timed rehearsal log included.

Week 4

Abnormal and emergency operations

  • Reconstruct the emergency-operating-procedure logic tree for a loss-of-coolant event, showing the branch points and the decision criteria at each branch.

  • Distinguish between a design-basis accident and a beyond-design-basis event and give two concrete examples of each with the operator's role in each.

  • Explain how the emergency core cooling and containment isolation systems actuate, including the automatic trip signals and the operator's manual backup actions.

  • Diagnose three fault scenarios from symptom sets only (no procedure), stating your hypothesis, the confirming instrument, and the next test you would run.

Your checkpoint

A written fault-diagnosis worksheet for three symptom sets, scored against a self-built answer key.

Week 5

Safety, environmental, and regulatory requirements & Maintenance, testing, and surveillance

  • Summarize the safety, environmental, and regulatory obligations that attach to a single operating shift, citing the type of requirement (reporting, limits, surveillance, recordkeeping) rather than quoting regulation numbers you cannot verify.

  • Explain how a technical specification limit differs from an administrative limit and what the operator must do when either is approached.

  • Build a surveillance-test schedule for one system and state the acceptance criteria, test frequency basis, and the action taken on a failed test.

  • Describe how a maintenance work order moves from request to return-to-service, and list the operator's hold points in that flow.

Your checkpoint

A one-system surveillance and maintenance flow sheet with acceptance criteria and operator hold points.

Week 6

Radiation protection and chemistry controls & Communication, documentation, and human performance

  • Explain the three radiation-protection principles (time, distance, shielding) with a worked example showing how each reduces dose.

  • Distinguish between contamination and radiation exposure and describe the monitoring and control technique for each.

  • Outline the chemistry parameters an operator watches routinely and what an out-of-spec reading implies for plant operation.

  • Write three practice log entries and three practice shift-turnover briefings, each in the standard format, then critique them for ambiguity.

Your checkpoint

A dose-reduction worked example plus a set of six written communications critiqued against a clarity checklist.

Week 7

Communication, documentation, and human performance & Electrical and mechanical fundamentals

  • Apply a human-performance error-prevention tool (self-check, three-way communication, procedure use-and-adherence) to three realistic task walkthroughs and record where each tool caught a latent error.

  • Diagnose five basic electrical faults (open circuit, short, ground fault, overload, loss of phase) from symptom descriptions and state the safe response for each.

  • Explain the mechanical fundamentals behind pump cavitation, valve binding, and bearing overheating, and name the instrument reading that reveals each.

  • Explain how a loss of offsite power propagates through the plant and which systems must start automatically.

Your checkpoint

A combined human-performance and electrical/mechanical fault card covering five faults and three tool applications.

Week 8

Plant systems, components, and instrumentation & Plant operations and normal procedures & Abnormal and emergency operations & Safety, environmental, and regulatory requirements & Maintenance, testing, and surveillance & Radiation protection and chemistry controls & Communication, documentation, and human performance & Electrical and mechanical fundamentals

  • Take two full-length timed practice exams under exam conditions and record the score by domain.

  • Re-study only the two lowest-scoring domains, targeting the specific missed concepts rather than re-reading whole chapters.

  • Re-take the missed questions from both practice exams and reach at least 90% on the retry.

  • Write a one-page personal exam-day plan covering time allocation, question triage, and the topics you will not over-invest in.

Your checkpoint

A domain-scored results sheet from two timed practice exams plus a one-page exam-day plan.

Milestones

Week 2: You can trace startup and shutdown from memory with no more than three errors against the procedure structure.

Week 4: You can classify any given abnormal event into the correct severity tier and state the first three operator actions within 60 seconds.

Week 6: You score at least 75% on a mixed practice set drawn from domains 1 through 6.

Week 8: You score at least 80% overall on two timed practice exams, with no single domain below 65%.