Junior Operator Grade I case studies
Junior Operator Grade I · Put your knowledge to work in context.
Junior Operator Grade I is an entry-level operator qualification for people who run or support industrial plant equipment under supervision - typically power generation, process, water/wastewater, or similar steam-and-machinery environments. The credential signals that a candidate can read plant conditions from instruments, follow written procedures in the right order, recognise when a parameter is drifting out of band, and respond correctly when something goes wrong. The Junior Operator Grade I case studies are 5 cases and about 4,095 words.
1Instrument air header pressure decay with moisture breakthrough
At 02:15 the unit is steady at 100% power. Instrument air header pressure has drifted from 690 kPa(g) to 622 kPa(g) over 40 minutes.
838 words, about 4 min2Condenser pressure rise during a controlled power ascension
The unit is being raised from 70% to 90% power at a controlled 3% per hour. At 78% power the condenser pressure has risen from 4.9 kPa(a) to 7.1 kPa(a) in 50 minutes.
792 words, about 4 min3Steam generator tube leak with a rising trend and grid pressure
At 100% power the condenser off-gas radiation monitor rises from 0.4 to 3.8 times background over 25 minutes. The 'B' main steam line monitor rises from 0.6 to 2.1 mSv/h while 'A' remains steady at 0.6 mSv/h.
854 words, about 4 min4Emergency diesel generator surveillance failure
During the monthly surveillance of the 'B' emergency diesel generator the recorder shows: start signal at 10:00:00, rated speed and voltage reached at 10:00:13. The surveillance procedure requires rated voltage and frequency within 12 seconds.
805 words, about 4 min5Airborne contamination and compromised respiratory protection
Two contract workers are changing a prefilter in the radwaste building ventilation exhaust unit under a routine radiation work permit. At 09:40 the area continuous air monitor alarms at 3.2 times its alarm setpoint.
806 words, about 4 min