High Activity/Internal Flooding Flashcards
What are entry conditions into high gross gamma activity section of high activity in RCS AOP?
What are entry conditions for failed fuel section in high activity in RCS AOP?
Why is hot leg sample not normally aligned at power?
What actions are taken if chemistry sample indicated specific activity exceeds 0.1 uCi/gm?
Refer to TS 3.4.12, attempt to restore < limit in 48 hours, if not restored (< 0.1 or dose equivalent Iodine > 6 uCi/gm) then enter mode 3 in 6 hours at 30%/hr and cooldown to mode 5 in 36 hours.
What is the recommended configuration of letdown during high gross gamma activity section?
Maximize letdown at CRS discretion
or
Isolate Letdown if vital area access is jeopardized due to dose rates
What actions are taken if letdown is isolated?
Maintain < 290” by reducing seal injection flow by placing CV-1206 in override and maintain minimum of 2.5 gpm SI to each RCP or isolate SI and ensure ICW cooling.
What actions are taken if failed fuel ratio drops by 40%?
Reduce power by 50% of present power level at 30%/hr.
What actions are taken in failued fuel section if failed fuel iodine monitor reaches 1E8 and controlled access area monitor > 100 mr/hr?
Isolate letdown, align RCP bleedoff to quench tank.
What are entry conditions for Internal Flooding AOP?
What actions are taken for a circ water leak?
If leakage associated with single waterbox, then lower power < 99.75% and SG/RX demand in hand, Close condenser vacuum isolation, Close trap outlet isolation (WBV), Open Water box vent and close water box inlet.
If CW pumps must be secured soon as possible then trip RX (otherwise RPSD), actuate EFW, trip MFPs, Open ADV isolations, Close MSIVs and trip all CW pumps. Vacuum Pumps in PTL, Break vacuum and place condensate pumps in PTL.
What actions are taken for a condensate/feedwater leak?
If hotwell stable and downstream of MFPs and threat to operation, trip rx, actuate EFW and trip MFPs.
If hotwell stable and leakage from E-3/4/5/6 or 8 then perform RPSD to lower power in preps for bypassing heater.
What actions are taken for a SW leak?
Close SW to ICW coolers from loop with lowest pressure.
If un-isolable leak > 25 gpm in non-seismic boundary of ICW cooler and aligned to ECP then isolate ICW cooler within 12 hours.
What TS are entered if 1 SW loop inoperable modes 1 - 4?
- 7.7A for SW
- 8.1B for associated EDG
- 4.6 for RCP loops mode 4
What actions are taken for firewater leak?
If no fire fighting activities in progress then secure fire water pumps and enter TRM 3.7.8 and isolate.
What actions are taken if hotwell level is low and can not be recovered?
Trip RX, EFW, Trip MFPs, Condensate pumps in PTL.
