Service Water

Question 1

P-7A/B/C Overload Trip Setpoint

Answer 1

92 Amps

Question 2

P-7A/B/C Amp Guages

Answer 2

C-08

Question 3

P-7A/B/C Basket Strainer High DP

Answer 3

7 psid up to 8 second time delay

Question 4

Low Critical Service Water Header Pressure

Answer 4

45 PSIG

Question 5

Non-Critical SW Low Pressure

Answer 5

45 PSIG

Question 6

A Critical Header Loads

Answer 6

P-7A:

• VC-10
• 1-2 EDG
• VC-1A
• E-18C
• VHX-27A (East ESS)
• ESS Pumps Cooling
• E-54A/B

Question 7

B Critical Header Loads

Answer 7

P-7C:

• VHX-1/4
• Cntmt Fire Wheels
• VC-11
• 1-1 EDG
• VC-1B
• E-18A
• VHX-27B (West ESS)

Question 8

F-4B/C Traveling Screens Wash Cycle

Answer 8

Once every 8 hrs for 12 minutes or on high DL of 6 inches.

Question 9

How does F-13A/B Operate?

Answer 9

Off, Intermittent (1.5 PSID or 4 times per day), and Continuous

Question 10

What is the design and capacity of P-7A/B/C?

Answer 10

Virtical turbine pumps. 8,000 GPM at 140 feet (60 psi)

Question 11

What is P-7A/B/C Power Supply?

Answer 11

D-Bus

• P-7A/C

C-Bus

• P-7B

Question 12

What pumps draw from the SW Bay?

Answer 12

P-7A/B/C, P-9A, P-9B, P-4, P-13

Question 13

What is P-7A/B/C NPSH Requirement?

Answer 13

31 feet. At 85F and 568.25’ NPSH Available is 56 feet

Question 14

What is Minimum Lake Level for P-5 to supply Intake Structure?

Answer 14

578’ 4”

Question 15

How do you arm the Standby Feature of a SW Pump?

Answer 15

Press the Amber Standby Light.

Question 16

What starts a standby SW pump?

Answer 16

40 psi on pressure switch in that pumps start circuit. Pressure switch (1 each) is located on other pumps discharge.

Question 17

What is normal SW pump discharge pressure?

Answer 17

70 - 85 psi

Question 18

What is happenning at 90 psi discharge pressure?

Answer 18

Potential low flow condition and pump damage.

Question 19

Describe the intake crib

Answer 19

2/3 mile out (3300 feet) and 20 feet down, passing up to 390,000 gpm

Question 20

What happens if you arm a SW pump for standby with only 1 pump operating?

Answer 20

The pump will start as it sees low discharge pressure on the other non operating pump.

Question 21

What are the SIAS effects on system?

Answer 21

• All 3 SW pumps start
• CV-1359 isolates non-critical loads
• VHX 1-4 High Caps open/seal-in
• VHX-4 inlet closes,

Question 22

What happens on loss of offsite power?

Answer 22

P-7A/B start after 10 seconds

P-7C after 26 seconds via the normal shutdown sequencer.

Question 23

What happens on loss of offsite power with SIAS?

Answer 23

DBA sequencer.

• P-7A/B start after 10 seconds
• P-7C after 26 seconds

Question 24

What happens to SW on RAS?

Answer 24

• CV-0823 and CV-0826, CCW Heat Exchanger High Caps will go to the hard-stop postions and indicate red only.

Approximately 3300 GPM/Hx.

• CV-0821 and CV-0822, CCW TCV’s go closed

Question 25

Which SW pumps have a RLTS?

Answer 25

P-7B

Question 26

What are CR indications for SW system?

Answer 26

* Service Water Pump amps * D/Gs outlet temperatures * CCW Hx outlet temperatures. * SW Critical header pressures * ESS Room Cooler temp indications * SW inlet temp (TR-5370) * SW outlet temp (TR-5370) * Radiation Detector, RIA-0833

Question 27

At what SW Pump gland tempeature do you take action?

Answer 27

120 degrees notify maintenance. 140 - have packing adjusted allow more top of packing leakoff. Packing adjustments performed while the pump is running do NOT render the pump inoperable; therefore, pump testing or redundant equipment testing is NOT required.

Question 28

When is the UHS Operable?

Answer 28

UHS Operable Required Mode 1 -4 Temperature \<= 85F * DWO Limit 83.5F Level \>= 568.25 ft (top of SW Bay Sluice Gate) * DWO Limit - 569 ft

Question 29

When does the Max DBA Heat Load occur?

Answer 29

Max DBA Heat Load * Maximum post accident heat load occurs between 20 to 40 minutes after a design basis Loss of Coolant Accident (LOCA). * Near this time, the plant switches from injection to recirculation, and the containment cooling systems are required to remove the core decay heat.

Question 30

What is the NPDES Permit limit?

Answer 30

NPDES Permit limit 135. 2 million gallons per day (mg/d). * Operation of three (3) Service Water Pumps and two (2) Dilution Water Pumps simultaneously with the plant off-line may result in exceeding this limit.

Question 31

How are the critical header cross-tie and isolation valves controlled?

Answer 31

Closing more than one of the following control valves with the plant in Mode 1, 2, 3, or 4 is NOT allowed AND the time any one of these valves is closed shall be minimized: * CV-0844 HEADER B (S) * CV-0845 HEADER A (N) * CV-0846 HDR CROSSTIE * CV-0857 HDR CROSSTIE

Question 32

How can SWS changes impact SFP Temperature?

Answer 32

SFP Temperature Any of the following actions may affect Spent Fuel Pool (SFP) temperature: * Changing position of CV-0823 (CV-0826), Component Cooling Water Hx E-54A (E-54B) Outlet * Changing position of CV-1359, Non-Critical Service Water Isolation * Changing CCW System heat load (isolating Shut Down Cooling Hx)

Question 33

What is the maximum service water flow through a CCW heat exchanger?

Answer 33

CCW Max SW Flow 7050 GPM to prevent damage to tubes Corresponds to 71 in H2O on FI-0823/0824.

Question 34

What are frazil ice conditions?

Answer 34

Frazil ice conditions * Water temperature is at or below 33F (TI-1319) * Air temperature is at or below 25F (PPC page 351)