PSW

Question 1

PSW Power Supplies

Answer 1

•	P41-C001A       4160v Bus E
•	P41-C001B       4160v Bus G
•	P41-C001C       4160v Bus F
•	P41-C001D       4160v Bus F
•	P41-C002,S/B D/G SW Pmp
1R24-S026 via 4160 1F or 2F (follows D/G Bkr)

Question 2

Physical Divisions

Answer 2

Div I - A/C

Div II - B/D

Question 3

Electrical Division

Answer 3

Div I - A/D (S025 via 600-C)

Div II - B/C (S027 via 600-D)

Question 4

RSDP Operation

Answer 4

• At RSDP PSW B
o Auto start on low pressure is defeated.
o Auto start after LOSP load shed is defeated.

Question 5

PSW Trips

Answer 5

OLLDM
• Overcurrent
• LOCA Load shed (w/ EDG Auto tie to bus)
- Pmps autostart if not in-service if LOCA ONLY
• LOSP Load shed
• DC Loss of Control Power (“C” & “D” Pmps only)
• Manual

Question 6

PSW TB Isolations

Answer 6

F316A-D (F310A-D) T/B Isol
• LOCA from EITHER CS logic
(keylock override)
• LOSP (86 Lockout)(when pwr restored)(keylock override)
• Con Bay Flooding 3” abv flr (NO OVERRIDE)
MUST HAVE POWER FOR VALVE TO PHYSICALLY ISOLATE

Question 7

PSW Initiations

Answer 7

• Stdby pump auto start 95 psig dec.
• W/ CS in AUTO, A&B pumps restart 22s after LOCA load shed if any pwr available
• Pumps sequence ON following LOSP Load shed (see 34AB-R22-002)
• Stby D/G PSW auto starts when 1B EDG starts
(All 3 switches must be in AUTO to get Auto Start, Any 1 of 3 sw in Off will stop pmp) (U1 Div II B/U to EDG)

Question 8

PSW Intake Level Limits

Answer 8

• 61.7 starts shiftly monitoring
• Min pump well level 61.2 else reduce flow <7000
• UHS inop <60.5’
o At 97° RHRSW and ECCS room coolers become INOP

Question 9

LOCA/LOSP Timer failure

Answer 9

LOCA – Start pump
LOSP – Open link in Swgr room
Then start pump

Question 10

PSW Pump Capacities

Answer 10

C001 - 8500gpm (30%/pmp) - (Min flow at 150psig)

C002 - 700gpm

Question 11

Screen limits

Answer 11

Timer - 12 hrs auto starts

dp level of 6” - runs until cleared

Question 12

Strainer limits

Answer 12

Based on dp - 4psid - runs for 6.5(2.5) min

Question 13

PSW SCRAM Limits

Answer 13

• TOTAL loss of PSW
• PSW Hdr press <50psig
• TB hdr press <30psig
• Suspected leak in Turbine Bldg

Question 14

TS LIMITS

Answer 14

1 pmp - 30 days
1 pmp/div - 7 days
1 TB Isol - 30 days
1TB isol/div - 72hrs

Mode 3-12
Mode 4 -36