RHR

Question 1

Which RHR pump supplies suction to the CCPs during CL Recirc?

Answer 1

East

Question 2

Which RHR Pump supplies suction to the SI pumps during CL Recirc?

Answer 2

West

Question 3

What is needed to open IMO-340, East RHR Hx to CCP Suction?

Answer 3

ICM-305, East RHR Pump Comte sump supply open and Either IMO-262 or 263 , SI Pump Recirc valve Closed

Question 4

What is needed to open IMO-350, West RHR Hx to SI Pump Suction?

Answer 4

ICM-306, West RHR Pump Comte sump supply open and Either IMO-262 or 263 , SI Pump Recirc valve Closed

Question 5

What is the set point for SV-103, RHR Cooldown Suction Line?

Answer 5

450 psig

Question 6

What is the capacity of SV-103, RHR Cooldown suction line safety?

Answer 6

900 gpm

Question 7

During LTOP, what are your modes of protection?

Answer 7

PORVS - 435 PSI if in cold over pressure

SV-103 - 450#

Question 8

What are the RWST Tech Specs?

Answer 8

375,000 gals
70-100*F
2400-2600 ppm boron

Question 9

What must be done before aligning RHR Spray?

Answer 9

Close RHR Loop injection valves before aligning spray to prevent runout

Question 10

How many RHR Pumps can be ran during reduced inventory and why?

Answer 10

1 bc it could cause air entrainment at Loop 2 suction

Question 11

How many RCS Loops are needed in Mode 4?

Can any be removed from service?

Answer 11

2 RCS or RHR Loops

All loops can be removed for 1 hour per 8 hours if no dilutions to violate SDM and core out temp > 10*F below sat temp

Question 12

How many RCS Loops are needed in M5 with loops filled?

Can any loops be taken out?

Answer 12

1 RHR Loop and 1 more RHR Loop OR 2 SG water levels 420” > WR Level Instrument.

1 RHR pump can be our for 1 hr per 8 hrs if:

1 RHR Loop may be INOP for 2 hrs for testing IF other RHR Loop is operable and in operation

Question 13

How many RCS Loops must be operable in M5 with loops drained?

Can RHR Loops be out at any time?

Answer 13

2 RHR Loops Operable, with 1 loop in operation

All RHR can be out for < 30 mins when switching loops IF: No dilutions violate SDM and Core out temp > 10*F below sat temp and No more draining RCS volume of boring reduction

1 RHR Loop can be INOP 2 hrs for testing if other RHR loop is OPERABEL and in operation

Question 14

How many RHR loops are needed in M6 with >= 23ft above top of Rx vessel flange?

May any loops be removed?

Answer 14

1 RHR Loop Operable.

May be removed for 1 hr / 8 hr period with no dilutions allowed

Question 15

How many RHR Loops are needed to be operable in M6 with < 23 ft above the Rx Vessel Flange?

Answer 15

2 RHR Loop operable with 1 in operation

Question 16

When is LTOP applicable?

Answer 16

M4 when any CL <= 266*F

M5

M6 with head on

Question 17

What are the LTOP vent paths available

Answer 17

2 PORVs < 435 psig

1 RHR Suction safety < 450 psig

RCS Vent >= 2 square inches

Question 18

When is RHR operation not permitted?

Answer 18

< 614’

Question 19

If control air is lost to IRV 310/320, what must be throttled to reduce flow thru the Hx, which will cause the cooldown rate to reduce?

Answer 19

ICM-311 / ICM-321

Question 20

When could an RHR Pump be removed for maintenance during Mode 4?

Answer 20

When you have a combination of 2 RHR Loops / 2 RCS Loops. This could be 1 RHR and 1 RCS. Or 2 RCS.

Question 21

When can an RHR pump be removed for maintenance during Mode 5? And Mode 6?

Answer 21

Mode 5 With Loops filled if you have 1 RHR Loop and 2 SG water levels greater than WR Level instrument

Mode 5 or 6 >= 23 ft above top of Rx Vessel Flange

Question 22

Why must core reload be stopped in M6 with cavity level > 23 ft if both RHR Pumps are inoperable?

Answer 22

Because 1 loop is needed in operation to provide for adequate RCS mixing and control or RC Temperature.