MSSS

Question 1

What panel is the SW pump MOD located on?

Answer 1

C18

Question 2

What causes an ICW pump auto start?

Answer 2

When ICW pump discharge pressure falls to 35 psig for 10 seconds, the x-over valves will realign and standby ICW pump will start

Question 3

What causes an RCP seal cooling pump to autostart?

Answer 3

When discharge pressure < 105 psig and suction pressure > 45 psig. CV-2287 bypass valve will open if suction pressure < 45 psig

Question 4

How do the ICW cross connects fail on loss of IA?

Answer 4

Fail Closed

Question 5

How do the RB Cooling Coil valves sequence when HS taken to open?

Answer 5

When HS taken to open the inlet valve will begin opening. The outlet valve will then begin opening when inlet is so far open. When closing, the outlet will begin closing, and then the inlet will start closing when outlet is 80-90% closed.

Question 6

What are the power sources for the SW Cross tie valves and what panels are they on?

Answer 6

B-52/B-62. CV-3640/3646 are red train on C18 and CV-3642/3644 green train on C16.

Question 7

What would be the SW pump alignment if all 3 pumps running and ES actuation? During LOOP?

Answer 7

All 3 pumps will remain running with P-4B aligned to appropriate loop. During LOOP A and C pumps will start back and if a pump trips P-4B will autostart due to being in normal after start position. SW pumps will not autostart except in LOOP.

Question 8

What are the ECP TS and admin limits?

Answer 8

5. 6 ft. – Minimum level for 30 days use
6. 5 ft. – Admin limit
7. 4 ft. – Lowest level allowed for short term basis
8. 2 ft. – Tech Spec limit
9. 2 ft.

≤ 100 deg. F

If specs not met, have 6 hrs to me in Mode 3

If visual inspection bad, 7 day timeclock

Question 9

What discharges to the East and West flumes?

Answer 9

East – E11A circ water discharge and unit 1 liquid radwaste discharge

West – E11B CW discharge, U2 liquid radwaste and NT release

Question 10

What are the condenser discharge water temperature limits?

Answer 10

> 105 deg F for > 2 days - CR

> 110 deg F > 1 hour – reduce plant load if necessary

Question 11

How do we initially start the CW system?

Answer 11

Start pump, discharge valve starts opening. 5 sec later the pump starts. AO will open valve breaker and after 2 min the pump will trip. AO closes breaker and pump is restarted.

Question 12

What is maximum rated flow for ICW pump?

Answer 12

2500 gpm

Question 13

What are the power supplies for the ICW pumps?

Answer 13

B-12 (P-33A)

B-22 (P-33B/C)