EOP-SDF-0 (1) Shutdown Critical Safety Function Status Trees

Shutdown Safety Tree

(Attachment 1)

Order of Priority:

Inventory, Heat Sink, Containment, Subcriticality, (P)Integrity, Core Cooling

“I Hope Zack Stops Poking Canines”

FOP Criteria

Entry Conditions

Checking for Adverse Containment and Tree Implementation

(Steps 1 & 2)

When to apply other procedures/monitoring

How to sequence Attachment 1 subsequent reviews

(Steps 3-5)

Criteria to Terminate SCSF Monitoring

(Step 4)

Background

When to implement other procedures

(Step 3)

Background

Block 1 CMT Actuation Signal Blocked

Background

Block 2 PZR Level Greater than 19.5% (NR)

Notice:

Irregardless of block status, MANUAL CMT Actuation is available via PMS/DAS

Background

Block 3 RCS Hot Leg Level Greater Than 64.5%

Background

Block 8 RCS Temperature Has Remained Within Plus Or Minus 5°F In Last 10 minutes