EO 2 B1 Clean Waste Flashcards
Which of the following are purposes of the Clean Liquid Radwaste System?
- Process reactor coolant for reuse.
- Separate and concentrate lithium for reuse.
- Separate and concentrate boric acid for reuse.
- De-borate letdown to lower RCS boron concentration following refueling.
A. 1 and 3
B. 1 and 4
C. 2 and 3
D. 2 and 4
A
Place the following components in flowpath order from the Reactor Coolant System letdown to the Boric Acid Evaporator.
- Primary demineralizer
- Primary demineralizer filter
- Clean waste receiver tank
- Clean waste receiver tank transfer pump
A. 1, 2, 3, 4
B. 2, 1, 3, 4
C. 2, 3, 4, 1
D. 3, 4, 1, 2
B
Place the following components in flowpath order from the Boric Acid Evaporator to the Deborating Demineralizer.
- Concentrates Demineralizer
- Concentrates Storage Tank
- Clean Waste Polishing Demin
- Clean Waste Monitor Tank Filter
- Clean Waste Monitor Tank Transfer Pump
- RE 1770 A and B
A. 1, 2, and 3
B. 2, 3, and 4
C. 3, 4, and 5
D. 4, 5, and 6
C
Which of the following components is in the flowpath for performing a Clean Waste Monitor Tank release?
- Clean Waste Monitor Tank filters
- Clean Waste Monitor Tank Transfer Pump
- Clean Waste Discharge Radiation Elements, RE 1 no A/B
- Clean Waste Polishing Demineralizer
A. 1 and 2
B. 2 and 3
C. 3 and 4
D. 1 and 4
B
Which of the following are normally processed through the Clean Liquid Radwaste System?
- Reactor Coolant Drain Tank
- Letdown from the Makeup and Purification System
- Containment Emergency Sump
- Spent Fuel Pool Overflow
A. 1 and 2
B. 1 and 4
C. 2and 3
D. 3 and 4
A
Plant Conditions:
o A liquid radwaste discharge is in progress from Clean Waste Monitor Tank #1 to the Collection Box, when annunciator alarm 7-1-B, CLN WST SYS OUT RAD HI, is received.
o The operator determines that Clean Waste System Outlet Radiation Monitor, RE-1770A, is above its HIGH trip setpoint.
Which ONE of the following AUTOMATIC actions is the expected response of the Clean Waste System?
A. The operating Clean Waste Monitor Tank transfer pump TRIPS and isolation valve WC-1771, Clean Liquid Radwaste Discharge Flow Control valve CLOSES.
B. The operating Clean Waste Monitor Tank transfer pump TRIPS and WC-1704, Clean Waste Monitor Tank Outlet valve CLOSES.
C. Isolation valves WC-1701 A and B, Clean Liquid Radwaste to Collection Box Discharge Header Control valve will CLOSE, and WC-1704, Clean Waste Monitor Tank Outlet valve will OPEN.
D. Isolation valves WC-1771, Clean Liquid Radwaste Discharge Flow Control valve and WC1701 A and B, Clean Liquid Radwaste to Collection Box Discharge Header Control valve will CLOSE.
D
Which of the following combinations best describes the levels at which the Clean Waste Monitor Tank low level and high level alarms occur?
A. 1 foot, 9 feet
B. 2 feet, 11 feet
C. 3 feet, 4 feet
D. 12 feet 13 feet
A
When, in core life, would you expect to place the Deborating Demineralizers in service?
A. Middle of core life
B. End of core life
C. Beginning of core life
D. During refueling operations
B
From which ONE of the following locations can the Clean Liquid Radwaste System receive water for processing?
A. Refueling Canal Overflow
B. Spent Fuel Pool Overflow
C. Containment Emergency Sump
D. Emergency Core Cooling System Room Sump Pumps
D
Which ONE of the following components is NOT in the flowpath for performing a Clean Waste Monitor Tank release?
A. Clean Waste Monitor Tank filters
B. Clean Waste Monitor Tank Transfer Pump
C. RE 1770 A/B Clean Waste Radiation Monitors
D. WC 1771 Clean Waste Monitor Tank Transfer Pump Discharge Valve
A
Which ONE of the following describes the operating principle of the Boric Acid Evaporator?
A. The solubility of boric acid in water is INVERSELY proportional to boric acid evaporator temperature.
B. The solubility of boric acid in water is DIRECTLY proportional to boric acid evaporator flowrate.
C. Boric acid in water is VOLATILE and, therefore, will be concentrated in the distillate section.
D. Boric acid in water is NON-VOLATILE and, therefore, relatively pure water will be collected in the distillate section.
D
Which ONE of the following explains why the deborating demineralizers are bypassed when transferring the contents of a Clean Waste Monitor Tank to the Makeup and Purification System?
A. This flowpath is NOT physically available due to the piping/valving arrangement.
B. Since the water in the Clean Waste Monitor Tanks has already been deborated by the Boric Acid evaporator, it is NOT necessary (or advisable) to reprocess this water in the deborating demineralizers.
C. Due to the length of piping, the additional head loss in passing through the deborating demineralizers would prohibit an adequate flowrate back into the Makeup and Purification System.
D. Should the Quench Tank Recirculation Pump cycle ON when the Clean Waste Monitor Tank discharge was being processed through the deborating demineralizers, this would result in Quench Tank discharge being short-cycled to the Makeup and Purification System without adequate processing.
B
Which ONE of the following conditions will cause an AUTOMATIC TRIP of the operating Bottoms circulation pump on a Boric Acid Evaporator?
A. High concentrator temperature
B. High air/water separator tank level
C. Low distillate flow
D. Low concentrator level
D
Match the Clean Liquid Radwaste component in the left column with its purpose in the right column.
- Clean Waste Receiver Tank
- Boric Acid Evaporators
- Deborating Demineralizers
- Clean Waste Monitor Tank
A. Collect and store borated water f or reuse.
B. Collect and store distillate for reuse.
C. Separate and concentrate boric acid for reuse.
D. Remove boron from the coolant during periods of low boron concentration.
- A.
- C.
- D.
- B.
If the inlet temperature to the Clean Waste Primary Demineralizer exceeds 150°F, which ONE of the following will occur automatically?
A. The inlet valves to the Clean Waste Receiver Tanks will receive an AUTO OPEN signal to ensure enough flow through the demineralizer.
B. The inlet valves to the Clean Waste Receiver Tanks will receive an AUTO CLOSE signal to protect the demineralizer.
C. The inlet valve to the Clean Waste Primary Demineralizer (WC1453) receives an AUTO OPEN signal to ensure enough flow through the demineralizer.
D. The inlet valve to the Clean Waste Primary Demineralizer (WC1453) receives an AUTO CLOSE signal to protect the demineralizer.
D