HV Electrical Distribution

Question 1

What three pieces of information can you find on an SKM Label?

Answer 1

Incident Energy
Flash Hazard Boundary
Equipment Voltage

Question 2

Where does the desert site INL Loop start?

Answer 2

Scoville Substation, North of CFA

Question 3

Why do we have a loop configuration for the INL Power System?

Answer 3

Should any one section fail, power will remain uninterrupted.

Question 4

Describe the ATR Area concerning HV Electrical Distribution.

Answer 4

ATR Area is defined as TRA-670, TRA-771 Cooling Towers, TRA-671 Cooling Water Pumphouse, TRA-689 Dynamic Learning, and TRA-634 Storage.

Question 5

Describe the Outer/Utility Area concerning HV Electrical Distribution.

Answer 5

The Outer/Utility Area is anything within the ATR Complex but outside of the ATR Area.

Question 6

Describe offsite power feeds into ATR.

Answer 6

TRA-757 ATR Complex Main Substation and 623 Control House sit in the NE Corner of the site. 138kV feed from NRF and INTEC.

Question 7

What two transformer configurations step down 138kV offsite at ATR?

Answer 7

13.8kV step-down
2400V stepdown

Question 8

What is supplied by Offsite-13.8kV step-down transformer?

Answer 8

TRA-623 Control House
TRA-785 Switchgear pad
TRA-786 Heat Deep Well Elec Equipment

Question 9

What is supplied by Offsite-2400V step-down transformer?

Answer 9

TRA-623 Control House 2400V Bus Switchgear.

Question 10

Draw the ATR Complex Double-Ended Bus Power Distribution System.

Answer 10

Question 11

What are the ATR Feeder Buses?

Answer 11

13.8kV Indoor CBs located inside TRA-623 Substation Control House.

Question 12

Draw ATR Feeder Bus Interface with Commercial Buses.

Answer 12

Question 13

What is the only load in the outer area fed from 4160V Commercial Bus A?

Answer 13

Deep Well #4

Question 14

What is the location of the 13.8kV-4160V step-down transformers?

Answer 14

South of TRA-781 and 688.

Question 15

What is supplied by the 2400V Bus Switchgear?

Answer 15

TRA-609 Compressor
TRA-693 Electrical Switchgear Enclosure
TRA-634 Storage Facility
TRA-625 Maintenance
TRA-604 Mechanical and Electrical Equipment Basement
TRA-1612 Swordfish Substation
TRA-605 Warm Waste Treatment
TRA-623 Substation Control House
TRA-688 Firewater Pumphouse

Question 16

Where are the 2400V Switchgears located?

Answer 16

Inside TRA-623 Control House

Question 17

Draw INL 138kV Loop.

Answer 17

Question 18

Draw TRA-623 Substation Control House Switchgear distribution.

Answer 18

Question 19

Where is the ATR Diesel Bus UV Relay Located?

Answer 19

Back wall of control panel E-119.

Question 20

Where are the Commercial Power UV Relays located?

Answer 20

Mounted on the wall behind 2400V Switchgear in TRA-609 Compressor bldg.

Question 21

At what percentage do our UV relays de-energize?

Answer 21

70%

Question 22

Draw TRA-609 Electrical Distribution.

Answer 22

Question 23

What is the normal status of the TRA-609 diesel bus during operation?

Answer 23

Diesel power is a dead bus during normal commercial power operation.

Question 24

Draw the normal lineup for Outer Area Electrical Distribution.

Answer 24

Question 25

Give the acronym and description for Utility Area auto bus transfer switches.

Answer 25

SAWW 1. S - Security - TRA-604 Mech/Elec Basement 0 seconds 2. A - Air - TRA-609 Compressor Building 2 seconds 3. W - Waste - TRA-605 Warm Wastewater Treatment 4 seconds 4. W - Water - TRA-619 Raw Water Pumphouse 6 seconds

Question 26

Draw TRA-604 Electrical Distribution.

Answer 26

Question 27

From what building does 2400V power to TRA-604 come from?

Answer 27

TRA-604 Mech/Elec Equip Basement is fed from TRA-623 substation.

Question 28

What time delays are associated with TRA-604 ATS operation?

Answer 28

No delay in transfer switch going from Comm -> Diesel 5 min delay to transfer back to Comm from Diesel

Question 29

What is the backup power for 609 if diesel fails?

Answer 29

Battery Bank 609-E-39 Battery Charger 609-BC-39

Question 30

What is the purpose of the TRA-609 M-6 Peak Shaving Breaker?

Answer 30

Can be used to parallel M-6 with Comm Power. Used to cut electrical costs by supplying additional power during peak use hours.

Question 31

Draw TRA-605 Electrical Distribution.

Answer 31

Question 32

What time delays are associated with TRA-605 ATS operation?

Answer 32

Auto transfer both directions.

Question 33

Draw TRA-693 -> TRA-619 Electrical.

Answer 33

Question 34

What loads are fed by 1612 Swordfish Substation?

Answer 34

TRA-620 Office Bldg TRA-1627 Radioanalytical Chem Lab TRA-1608 Technical Support TRA-678 Rad Measurement Lab TRA-1626 TTAF TRA-1643 Maintenance Support TRA-1645 Modular Office Bldg TRA-1612 Swordfish Substation

Question 35

What is the purpose of the 1646 PEEB?

Answer 35

Step down voltage from 13.8kV to 4160V.

Question 36

What components are contained by TRA-785 Switchgear Pad?

Answer 36

785-SS-1 Sectionalizer Switch feeding 785-SS-2 785-SS-2 feeds Disconnects DSW-1/2/3 DSW-1 feeds 480V to 785-E-1 Distribution Center DSW-2 feeds 480V to TRA-679 Sim Training and TRA-680 DSW-3 feeds 480V to TRA-653 maintenance Shop

Question 37

What components are contained by TRA-786 Deep Well Electrical Equipment?

Answer 37

13.8kV SS-1 feeding Deep Well 1 MCC then Deep Well 1 and ATR Heat Dist Center Deep Well 3 DG, 786-M-1 feeds 480/4160V XFMR that feeds Deep Well 3 MCC and Deep Well 3

Question 38

How many Primary HXs?

Answer 38

5

Question 39

What is the secondary (shell) side relief valve setting for Primary HXs?

Answer 39

80 psig

Question 40

Tube material for primary HXs?

Answer 40

Inconel (except M-3 (stainless))