EOP-ES-1.3 (1) ADS Stage 1-3 Actuation Response

Critical Safety Function Status Tree monitoring during ES-1.3

(Step 1 Note)

Pressurizer Venting risk

(Step 1 Caution)

1st Stage

Actuation time

RNO Action

2nd Stage

Actuation time

RNO Action

3rd Stage

Actuation time

RNO Action

Refresher

ADS Stage 4 Actuation

RNS Actions following Depressurization

(Step 19)

How does Manually blocking RNS “S” affect an RNS Containment Isolation?

(Step 28 Note)

CLP Injection Availability?

(Step 39)

>43.83’

No Fuel

Closed and sealed

*Disclaimer for Those Who Come After:

The seals will never be good enough per some engineering assessment, so as soon as the “norm” is Fuel always in the Pool we will never utilize the CLP unless someday we spend a ton of money to beef up the seals (doubtful)

How to Actuate ADS within ES-1.3?

(Step 2 RNO)

DAS ADS Actuation time delays (between isolation and control valves) per stage?

1: 30sec

2&3: 60sec

CMT Actuation

(Step 11)

Requirement to Actuate DAS PRHR?

Requirement to Actuate DAS Containment Isolation?

PCS Operation?

Requirement for DAS PCS Actuation?

(Step 15 and RNO)

What dictates if CLP Injection is required?

(Step 32)

No CMTs: Need to make up for the missing credited inventory that didn’t inject

<600sec: DVI Line break so catastrophic that some credited inventory ended up in PXS rooms and not in credited/postulated area (Containment fill up)

Entry Path

(Basic FOP from E-0)