EOP-E-0 (1) Reactor Trip or Safeguards Actuation

Purpose and Applicability of E-0

Response to Reactor Trip and/or Safeguards

MODES 1-4

Adverse Containment Criteria

Containment Pressure >5psig

Containment Rad >1.0xE5 Rad/hr (100,000)

Containment Int. Dose >1.0xE6 Rad (1,000,000)

*IF Pressure lowers below 5psig, STOP using adverse values

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ADS Stages 1-3 Actuation Criteria
And Response

ADS 1-3 Actuation is ON

OR

CMT Upper NR Level - LESS THAN 57.5%

OR

NO CMT operating AND sustained HL Level <20% [58%]

Response:
Implement Status Trees (F-0)
Go To: ES-1.3 ADS Stage 1-3 Actuation Response Step 1

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ADS Stage 4 Actuation Criteria
And Response

CMT Lower NR Level - LESS THAN 56%

OR

NO CMT operating AND sustained HL Level <20% [58%]

Response:
Go To: ES-1.4 ADS Stage 4 Actuation Response Step 1

RNO of Check P-3 ON
(Step 2a.)

Sequentially and ALL Steps:

1. Actuate DAS Reactor & Turbine Trip (Enable switch PDSP before)

2. Open Rod Drive MG Output Breakers
   PLS-JD-RDM001/2

3. Stop Rod Drive MG Sets

RNO of Check IRNI <5%
(Step 2b.)

Implement F-0 Status Trees

Go To: FR-S.1 Response to Nuclear Power Generation - ATWS Step 1

Check Turbine Tripped
(Step 3a. RNO)

Check STOP Valves closed

Check CONTROL Valves closed
IF Control Valve open perform ANY
PDSP Turbine Trip
DAS Reactor & Turbine Trip
Both EHC Pumps to MANUAL & STOP
Local Trip

If cannot stop steam flow to Turbine
Actuate MSL Isolation
Check MSIVs (V040s) and MSIV Bypasses (V240s)

Check ZAS-ES-01 Generator Circuit Breaker Open
(Step 3b. RNO)

Manually OPEN ZAS-ES-01

IF doesn’t OPEN
Open BOTH Switchyard output breakers
ZBS-161750/161850

Criteria if Safeguards is REQUIRED
(Step 4 RNO)

RCS Subcooling <10°F per CETs

OR

PZR NR cannot be maintained >10%

OR

BOTH:
SG NR in BOTH SGs <21%
Total FW flow <400gpm

Criteria to Actuate DAS PRHR
(Step 8 Check PRHR Actuated RNO)

You have Manually actuated PDSP PRHR
Manually cycled all applicable flowpath/gutter valves

IF PRHR Flow cannot be established >888gpm [>1,351gpm]
IF Gutter drain path cannot be isolated

Signs of an Operating CMT
(Step 10b.)

CMT Top Temp - RISING

OR

CMT Upper NR Levels - LOWERING

OR

CMT WR Level - LOWERING

*Heating up from the inlet or lowering inventory

Criteria to Actuate RNS Isolation

Only if RNS Leakage is reported/suspected

(Step 13a. RNO)

Step 19. Ensure Steam Lines Isolated

Which Valve is Ensured Closed but does NOT get a MSL Isolation signal

MSS-V025 GSS/ASS Steam MOV

Criteria to actuate SG Relief Isolation
(Step 20 RNO)

Only if the PATH is NOT isolated

*If EITHER the PORV/Block work, no system level isolation

Criteria to actuate DAS PCS
(Step 22 RNO)

After Manually actuating PCS, Opening all flowpath valves:
IF NO path can be established
Actuate DAS Containment Cooling

*So any SINGLE path will negate the need for DAS

PCS Flow Criteria to utilize Post-72hr guidance

IF flow is <105gpm

P-72 guidance utilizes PCCAWST inventory

E-0

Immediate Operator Actions

E-0

Next path if E-0 is COMPLETED

(Step 27)

Attachment 1 RNS Alignment for IRWST Cooling is Implemented

Go To E-1 Loss of Reactor or Secondary Coolant

If you remain in E-0 and P-3 is still OFF,

When are Reactor Trip Breakers Manually/Locally opened?

Attachment 1

Step 1 Reset “S”

Attachment 1

RNS Flow Restrictions

Limit due to IRWST Suction Strainers

Tested:

Inability to CLOSE RNS-V061 will PREVENT finishing Attachment 1

Attachment 1

Proper SWS Operation

Attachment 2

Valves that close on “T” refresher (Flashcard 1/2)

Attachment 2

Valves that close on “T” refresher (Flashcard 2/2)

Attachment 2

Valves that close on a Critical Containment DAS Isolation signal