Radioactive Drains (RD) Flashcards
Where does the Radioactive Drain System ultimately send any water it collects?
To the Liquid Radwaste System
High level in a RD sump starts the _______ pump.
Lead
High-High level in a RD sump starts the _______ pump.
Lag
Lo-Lo level in a RD sump does what?
Secures all operating sump pumps
To where do the Reactor Cavity Sump Pump discharge?
To the Containment East Sump
What must be open to start a Containment Sump Pump?
RDA UV-23 (MOV)
What will auto close the Containment Isolation Valves for the RD System?
CIAS
What are the Control Room alarms for the Reactor Cavity Sump and the Containment Sumps based on?
Sump fill rate (60 gal/60 min) and sump pump run time (5.5 min for CTMT East and West, 6.5 for Rx Cavity).
Which of the following sumps does NOT directly pump to the Liquid Radwaste (LR) system?
A. Containment East Sump
B. Containment West Sump
C. Reactor Cavity Sump
D. Non-ESF Sump
C. Reactor Cavity Sump The reactor cavity sump pumps to the Containment East Sump, which then pumps to the Liquid Radwaste (LR) system.
The RD system receives drains from all of the following systems EXCEPT:
A. Demineralized Water (DW)
B. Essential Chilled Water (EC)
C. Safety Injection (SI)
D. Domestic Service Water (DS)
D. Domestic Service Water (DS)
Which of the following describes the properties of the Reactor Cavity Sump Pumps?
A. 2 100% capacity pumps each with a flow rate of 30gal/min
B. 2 100% capacity pumps each with a flow rate of 15gal/min
C. 2 50% capacity pumps each with a flow rate of 30gal/min
D. 2 50% capacity pumps each with a flow rate of 15gal/min
A. 2 100% capacity pumps each with a flow rate of 30gal/min
The West Containment Sump has one pipe penetration to receive effluent from floor drains, equipment drains, refueling pool and the refueling pool liner plate leak detector compartment.
True False
True. The West Containment Sump has one pipe penetration. The East Containment Sump has two pipe penetrations. The second is to receive effluent from the reactor cavity sump pumps.
Given the following conditions:
1. RDA-UV-23, Containment Sump Pump Header Isolation Valve, is CLOSED
2. A hi-hi level condition on LC-19 has existed for 4 minutes. Which describes the behavior of the West Containment Sump Pump?
A. The pump will start dead-headed, and level will continue to rise.
B. The pump will not have received a start signal from LC-19 due to a time delay.
C. The pump will fail to start due to RDA-UV-23 being closed.
D. The pump will start and level will lower
C. The pump will fail to start due to RDA-UV-23 being closed. In order for the pump to start. RDA-UV-23 needs to be open. There is a 3 minute time delay for LC-19(20) to auto start the pumps on a hi-hi level condition.
What method of leak detection is used in the reactor cavity sump?
A. Leak detection station which is divided into six leak chase zones.
B. A hi and hi-hi level switch that alarms in the control room
C. Excessive pump run time that exceeds a preset limit
D. The reactor cavity sump does not have a method of leak detection.
C. Excessive pump run time that exceeds a preset limit There is also a time level measurement that will alarm in the control room if fill rate exceeds 60 gals/60 mins. (1 gpm).
Per LCO 3.4.14, RCS Operational LEAKAGE shall be limited to ____ primary to secondary LEAKAGE through any one steam generator (SG)
A. 1 gpm
B. 10 gpm
C. 150 gal per day
D. 0 gpm
C. 150 gal per day
The Steam Generator Program opreational LEAKAGE performance criterion in NEI 97-06 states “the RCS operational primary to secondary leakage through any one SG shall be limited to 150 gallons per day.” The limit is based on operating experience with SG tube degradation mechanisms that result in tube leakage. the operational leakage rate criterion in conjunction with the implementation of the Steam Generator Program is an effective measure for minimizing the frequency of steam generator tube ruptures.
