OW- Oily Waste

Question 1

What is the purpose of the OW system?

Answer 1

Collects and transports liquid waste from equipment and floor drains of the turbine building, the control building, the diesel generator buildings, the fire pump house, and the yard area

Collection point for an oil/water mixture at the oily waste separator, where the oil is manually skimmed and removed for proper disposal

Question 2

How many sump pumps are utilized in the sumps of the OW system?

Answer 2

2 each

Question 3

What is the purpose of the alternator on the plant sump pumps?

Answer 3

Changes the lead pump for each cycle to equalize running time and wear on the two pumps

Question 4

Why is there flow orifices installed in the discharge of the sump pumps?

Answer 4

To balance the flow to control pump run-out during one or two pump operation

Question 5

What system provides lubrication to the Control building sump pump’s intermediate and case bearing?

What about the Diesel Generator building sump pumps?

Answer 5

Demineralized Water

Domestic Water

Question 6

What starts and stops OW sump pumps on high or low level?

Answer 6

Float-type level control switches (first set for pump control, second set for alarm)

Question 7

The Turbine Building OW system sump pumps normally send waste to oil/water separator. Where else can waste be sent to?

Answer 7

Chemical Waste Neutralizer Tank or LRS Holdup Tanks when required by the presence of chemicals or radioactivity in the wastes respectively

Question 8

Where is the water from the non-class battery room floor drain directed to? Class battery room floor drain?

Answer 8

An Acid Neutralizing Sump prior to draining to the north condenser area sump

an acid neutralizing sump prior to the east or west control building sump, respectively

Question 9

Generally, what type of water is collected in the Turbine Building Sump?

Answer 9

From areas that have the highest potential for oil to be present

Question 10

What waste is received in the North Condenser Area Sump?

Answer 10

From the north and west areas of the turbine building

Also receives drains from the CST pump house

Question 11

What waste is received in the South Condenser Area Sump?

Answer 11

From the south and east areas of the turbine building

Question 12

What drains are collected in the OW West Control Building sump? Why are EWHX tube side drains directed to OW?

Answer 12

‘A’ train side of the Control building

‘A’ & ‘B’ Essential Cooling Water Heat Exchanger Tube Side drains

to prevent excessive influent to the RD system

Question 13

The East Control Building sump collects drains from which train?

Answer 13

‘B’ Train

Question 14

What is different about the OW waste drains from the ‘A’ and ‘B’ Cable spreading rooms?

Answer 14

They do not flow to the control building sumps

These areas are each drained separately to the ground outside the Control Building

Security screens are provided on the outside outlets of these two drains

Question 15

What collects in the East and West Diesel Building Sumps?

Where do the two sump pumps from each side discharge to?

Answer 15

East Diesel Building sump collects drains from the ‘B’ Train

the west sump collects drains from the ‘A’ train side of the Diesel Building

oily water separator

Question 16

What drains are received in the North Yard area sump?

Answer 16

Demin water storage tank and pumps

Auxiliary boiler and general area

Ground level Turbine building normal AHUs

(176’ turbine building AHUs and roof drains directed normally to circ water)

Question 17

Where do the Yard Area sumps discharge to?

Answer 17

Circ Water Canal

Question 18

What is the capacity of the Retention Tanks? Where are they located?

Answer 18

505,000 gallons

Plant west of the Unit 3 Spray Pond

Question 19

What is the purpose of the Retention Tanks?

Answer 19

Receive effluent from Units 1, 2, and 3 Turbine Building Oil/Water Separators and CWNT Transfer Pumps

Question 20

Who operates the Retention Tanks? What is done prior to sending CWNT contents to the retention tanks?

Answer 20

Water Resources

neutralize contents, sample, coordinate with WRF

Question 21

At what level will a sump pump start to pump its associated sump? When would the second pump start? At what level does the first pump secure? Second pump?

Answer 21

80% level (high)

90% level (hi-hi)

20% level (lo)

10% level (lo-lo)

Question 22

What is the purpose of the raised floor drain in the MTLO room?

Answer 22

to contain, in the case of a MTLO reservoir failure, the oil from the MTLO reservoir

there is also a floor drain valve that’s locked closed

Question 23

What is the purpose of the pressure control valves in the lubrication lines to the OW sump pumps?

Answer 23

prevent over pressurization and excessive flow through the Sump Pump bearings

Question 24

What is the purpose of the OW oil water separator?

Answer 24

a gravity and coalescing separator system that removes oil from the water it receives

Question 25

What flows does the OW oily water separator receive?

Answer 25

turbine building and condenser area sumps

control building sumps

diesel building sumps

Question 26

What prevents solids from getting sucked into the suction of the OW sump pumps?

Answer 26

inlet strainer

Question 27

What is the operation of the OW sump pumps in hard start?

Answer 27

pump will run level to the LO-LO level and stop

when the LO-LO level clears, the pump will start again

Question 28

Where are the OW sump pumps and Oily water separator sump motor space heaters powered from?

Answer 28

NH

O/W separator from a D-panel on an MCC