RQ-C-4861 (Liquid and Gaseous Waste & NESW)

Question 1

Why do we use H2 as a cover gas for the VCT

Answer 1

• Scavenges O2 that results from the radiolytic decomposition of water

Question 2

At what pressure will the in service GDT automatically be removed from service

Answer 2

• 100#

Question 3

Which ONE of the following is a function of the effluent discharge valve, 12-RRV-285?

A) The valve fails closed on a loss of air, as a fail-safe measure.
B) On a loss of electrical power to the valve motor, the valve must be immediately manually isolated.
C) The fail-open, manually adjusted, air-operated valve regulates flow through the effluent discharge monitor, RRS-1000.
D) The valve is located upstream of the effluent discharge monitor, RRS-1000, to ensure isolation of liquid discharge prior to the water entering the Circulating Water System piping.

Answer 3

A) The valve fails closed on a loss of air, as a fail-safe measure.

Question 4

What action is required to reset the load conservation and anti-pumping relays for NESW pumps

Answer 4

• Place the control switch in PTL

Question 5

With respect to NESW, what two purposes does load conservation serve

Answer 5

• Maximizes flow through CLVs and CAC
• Protects the EDG from overload during load sequencing

Question 6

Unit 1 is operating at power with the South NESW pump supplying Unit 1 and the Miscellaneous Header loads. An electrical fault on transformer TR11B causes the loss of Bus 11B.

The NESW system response will be to:

A) Isolate the misc. header crosstie valves on load sehd
B) Start the U2 South NESW pump due to load shed
C) Start the U1 North NESW pump
D) Continue operating as is, except the North NESW pump would not be available

Answer 6

C) Start the U1 North NESW pump

Question 7

Following a steam line break in Unit 1, Containment pressure reached 3.2 psig and the site had a loss of all off-site power. The Unit 1 Emergency Diesel Generators started and are supplying power to the emergency busses.
Unit 2 is operating at 95% power.

Which ONE of the following describes the correct status of the NESW System?

A) The standby U2 NESW pump received an auto-start signal from U1 SI actuation circuit
B) The U2 NESW pumps are supplying the U1 Control Air Compressor through the Misc. header cross-tie
C) The U1 SI signal started both of the U1 NESW pumps, and they remain running
D) U1 NESW pumps have tripped and cannot be restarted until they are taken to Trip/Lockout

Answer 7

D) U1 NESW pumps have tripped and cannot be restarted until they are taken to Trip/Lockout