EOP-SDP-1 Response to Loss of RCS Inventory during Shutdown

Entry Condition from SDF-0

Entry Condition not from SDF-0

Procedure Applicability

(Step 1)

Outside Containment Radiation

(Step 4)

RNS Pump Cavitation

(Step 5)

If Vessel Head is OFF

(Step 10)

Unnecessary RCS Vent and Drain Paths Isolation

(Step 15)

b. Rx Head Vent SOVs

c. Purification Stop MOVs

Isolating LTOP Reliefs

(Step 16)

Hot Leg Level

(Step 31)

Hydrogen Igniters

(Step 37)

PCS Actuation

(Step 38)

Aligning CCS for RNS Cooling

(Step 48)

d. Check RNS Hx CCS flow >2685gpm

RNO: Local throttle

Check RNS Shutdown Cooling Restored

(Step 56)

SFS Leak Isolation

(Attachment 1 for Reference)

Attachment Applicability

(Att. 2 IRWST Injection Using RNS Pumps, Steps 1-4)

RNS Support

(Att. 2 IRWST Injection Using RNS Pumps, Steps 5-7)

RNS Alignment

(Att. 2 IRWST Injection Using RNS Pumps, Steps 8-12)

Attachment Applicability

(Att. 3 Gravity Injection from IRWST, Steps 1-3)

RCS Inventory control throttle method

(Att. 3 Gravity Injection from IRWST, Step 7)

Accumulators Available for Injection

(Att. 4 RCS Makeup using CMTs and Accumulators, Step 3)

Stop Injection Accumulator <2%

Overall Strategy

(Att. 5 Loss of RCS Inventory with No Irradiated Fuel Assemblies in the Reactor Vessel)

• Establish CVS MU

• Place CIMs in LOCAL (RCS&PXS)

• Open CMT/PRHR Rese/Command Breakers

• CIM Close PRHR/CMT Outlets

• Trip Heat Input (RCPs/Heaters)

• Depress to <100psig via CVS/RNS

• CVSPs OFF

• Isolate Containment (then restore air)

• Unblock and Actuate 1-3

• RNS Containment Isolation