AOP-207 (2) Loss of Turbine Load

Symptoms and Entry Conditions

1. Reactor Critical AND SYNCHED to grid, + Turbine Trip symptoms

2. C-7 (10%step or 5%/min over 2min)

3. C-20

4. RPR System actuation

E-0 Triggers (Reactor Trip Causes)

“Go To”

Reactor Power LESS than 5%

Rods cannot be inserted in Manual

Turbine cannot be tripped
*Trip Reactor, MSL Isolation, Then go-to E-0

Any MSSV Open

>1 Rod dropped and OPDMS NOT Monitoring

OPDMS MPM <0% (Not greater than 0%)

If ANY additional Rod dropped other than selected RPR

No MFWPs running

Steam Dumps unavailable and RTP >10%

Cannot maintain SGNR >21%

“Continue On”

Gland Steam can’t be RESTORED >1.6psig

Reactor Power

RCS Temperature/AFD Control

(Step 1 & 2)

Refresher

P-17
Cause
Implications

Cause:
PR Rate more negative than 15% for 5sec

Implications:
Prevents Manual/Auto Rod withdrawal
Prevents Auto AO insertion

Attachment 2 Monitoring Secondary Plant Levels Implementation

(Step 3)

Open Stop Valves

Open MSSVs

(Step 4 & 5)

RPR, OPDMS, Rod(s) Dropped

(Step 6)

Power Distribution Limits

Minimum Power Margin

ESDM

(Step 7)

Manual Rod Control

(Step 9)

Bypass Valve Operation

(Step 10)

Condenser Steam Dump Operation

Load Demand Loss (SD-LRDMD)

(Step 12)

Transfer to Pressure Control Mode

(Step 18)

Establishing Low Power Rod Control

Prior to LPRC:

Steam Dumps in Pressure Mode

RTP within 12-20%

Attachment 1 Secondary Plant Alignments implementation

(Step 22)

Overlap Requirements

(Step 25)

Rod Control to Auto Warning

Step 27 NOTE)