AOP-206 Malfunction of Feedwater Heaters and Extraction Steam

Symptoms and Entry Conditions

Heater Trip (steam/tube)

High/Low alarm (level fluctuation) (also DST and MSRs/DTs)

MSR Shell Drain Pump trip

Priority over AOP-207 Loss of Turbine Load?

(Note prior to step 1)

"A-207 should take precedence over the performance of A-206 until power is stabilized”

If engineering determines string cannot remain in service

Utilize the SOP while CONTINUING A-206

Recall power limitation table

Percent limitations are based on Generator Power
100%=1210MWe

90

70

70

70

55

50

50

Cannot MAINTAIN 56.5” DST

Trip Reactor

Ensure all MFWPs OFF

Go To E-0

Rising DST Level Automatic Actions

123.5” Trip Reactor Drains close

135.5” Extraction Steam valves close

Which important valves have local handwheels?

(Note at beginning of Att. 3)

All Emergency Drain LCVs

LP Hot Reheat Temperature Difference limitation?

IF cannot be maintained within 50°F delta,
Trip the turbine and Go To A-207

Limitation on how many strings of heaters can be isolated?

IF at least TWO strings are not in service (1&2),
Trip the turbine and Go To A-207

Limitation of FWH 4 or 6 or 7 Extraction MOV?

If any FWH 4 or 6 or 7 extraction MOV cannot be closed,
Trip the turbine and Go To A-207