Pre-course ILT AB Flashcards
What is the flowpath from the BAT to the RCS?
BAT –> Boric Acid Transfer Pump –> CV110A(throttled) –> Blender –> CV110B –> VCT –> RCS
What is the flowpath from the BAT to the RCS?
BAT –> Boric Acid Transfer Pump –> CV 110A –> Blender –> CV110B –> VCT –> RCS
How many Boric Acid Tanks are there?
2, one for each unit
How many Boric Acid Transfer Pumps are there?
3, one for each unit and one common
What is the concentration of Boric Acid used at Braidwood?
4% by weight
>7000 ppm
What temperature must the Boric Acid be maintained above?
65 degF
What are the modes of control of the RCMS Mode Control Switch?
Auto, Borate, Dilute, Alt. Dilute, manual, RWST FILL (manual)
List the four general plant operations that form the design bases for the boron recycle system
i) Dilution for core burnup 1200 to 10 ppm beginning to end of core life
ii) Four hot shutdowns assumed to take place during an annual core cycle
iii) Three cold SDs assumed to take place during an annual core cycle
iv) Refueling S/D and S/U
For a normal at power CVCS alignment, describe the flowpath from the CVCS letdown sytem to the aligned recycle hold up tank. What water processing occurs along the way?
CV1112A –> AB250 –> Evap feed demins –> Evap feed filters –> HUT
How many boration flowpaths are required in Modes 4 and 5?
Either from the BATs to VCT OR from the RWST to CH
How many boration flow paths are required in Modes 1-3?
One from the RWST to CVCS and one additional path either from the RWST to CVCS or from the BAT to CVCS
State the required values to consider the BAST for each unit operable?
Modes 1-4: Temp >= 65 degF, concentration >= 7000 ppm, borated water level >= 40%
Mode 5: Temp >= 65 degF, concentration >= 7000 ppm, borated water level >= 12%
What are the required values for the RWST in Mode 5?
Temp >= 35 degF
Concentration 2300 - 2500 ppm
Borated water level >= 9%
List the inputs to the RHUT
VCT and ECCS reliefs
Borated EDT
valve leak off pump discharge
Letdown divert
