SOP-01 - Station Blackout

Question 1

What are the Entry Conditions for SOP-01?

Answer 1

The plant is in operation and experiences the following:
- Total loss of offsite power (345 kv and 115 kv)
AND
- DIV I AND DIV 2 diesel generators are unavailable

Question 2

What automatic actions are expected to occur when in SOP-01?

Answer 2

• Turbine Trip
• Reactor Scram
• All plant loads NOT being supplied directly by batteries or UPS power, suffer a loss of power

Question 3

Are security measures required to be taken when opening Control Room / Relay Room Doors?

Answer 3

Depending on overall impact to station security, implementation of security compensatory measures in response to the actions directed in the flowchart to open all Control Room and Relay Room doors may not be feasible. In that event, under the authority of 10CFR 50.54(x) and 50.54(y), the Shift Manager shall contact the Security Shift Supervisor and approve suspension of security measures under the provisions of 10CFR73.55(p), if needed, in an emergency to protect the public health and safety if actions consistent with license conditions and Technical Specification cannot provide adequate or equivalent protection.

Question 4

What are the legs of the SOP-01 Flowchart?

Answer 4

• Power Restoration
• Spent Fuel Pool
• Control Building Habitability
• Containment Isolation
• RCIC Availability
• RPV Injection Capability
• 125 VDC Battery Load

Question 5

By what time should deployment of fire hose for alternate Fuel Pool spray cooling on the refuel floor begin?

Answer 5

To be able to stage the hose for the alternate Fuel Pool spray cooling on the refuel floor before the temperature becomes prohibitive, a team would need to be dispatched very early, within the first 60 minutes. If the diesel driven fire pump is available a FLEX pump should still be deployed for redundancy.

Question 6

Under what conditions and by what time should the deployment of the first portable pump begin?

Answer 6

Deploying the first pump should begin by the first hour, if HPCS is not available or the fire water header does not have an adequate supply. This will ensure the pump is ready to back up the RCIC pump, and allow sufficient time for FLEX generator deployment and connection.

Question 7

How long do you have to commence deployment of the Flex Generator?

Answer 7

The generator would be the second FLEX equipment needing deployment. With an 12 hour battery coping time and assuming 5 hours to connect, deployment should begin within 3 hours to allow sufficient margin.

Question 8

The Spent Fuel Pool leg directs breaching secondary containment, how is this done and why?

Answer 8

To establish a vent pathway for steam and condensate from the spent fuel pool that could cause equipment and access problems, breaching of the secondary containment is directed in section SFP. Opening airlock doors on the 261’ level and refuel floor airlock doors to the roof will establish a natural circulation vent path through the upper levels of the reactor building.

Question 9

You are in an ELAP with one portable pump setup supply injection to the RPV and providing makeup to the Spent Fuel Pool. A small leak in the vessel causes the pump operator to increase flow to the RPV to maintain level. Upon increasing flow, the pump operator notes that the pump is cavitating. What should be done?

Answer 9

With the deep draft that the FLEX pumps will be operating from and multiple choices for injection paths, flow demands could be put on the pump, depending on system back pressures, that could lead to cavitation if all valves are wide open. If cavitation is suspected a prioritization of loads may be required. For example, reducing flow to spent fuel pool makeup may be appropriate until RPV water level has margin for core cooling to prevent cavitation. Since flow indication will be inferred by pressure and level indications, communications between the pump operator, the level control operator and the control room person running the EOPs is essential.

Question 10

What procedure is used for power restoration while in SOP-01?

Answer 10

Restore AC power per N2-SOP-03.

Question 11

What conditions will direct us to call for “Safer Equipment Support”?

Answer 11

If :
Power not restored to either
2ENS*SWG101 or 2 ENS*SWG103
within 1 hour
Then:
Notify NSRC that SAFER equipment
support should begin. Call NDO at
630-657-2202

Question 12

What actions are taken if Offsite Power or an Div 1(2) EDG is restored?

Answer 12

-Energize emergency switchgear
with any available power source
per N2-SOP-03.

-Verify the following systems restored:
· Spent Fuel Pool Cooling per N2-SOP-38.
· Control Building Ventilation per N2-OP-53A, E.2.0.
· Reactor Building Ventilation per N2-OP-52, H.2.0.

Question 13

When Restoring Control Building Ventilation, Reactor Building Ventilation, and Spent Fuel Pool Cooling, which system takes priority?

Answer 13

• SFC has priority for restoration.

Question 14

What are the Load Limits when running the EDGs?

Answer 14

EDG : CONTINUOUS LIMIT : 2 HOUR LIMIT(110%)
DIV 1 & 2 : 4400 KW : 4840 KW
DIV 3 : 2600 KW : 2860 KW

Question 15

By what time must refuel floor hose deployment be completed?

Answer 15

BEFORE 7 hours have elapsed.

Question 16

What must be done BEFORE 8 hours have elapsed

Answer 16

• Open Reactor Building Doors per SOP-2 Attachment 8

- Begin deployment of portable pump for Refuel Floor Sprays

Question 17

How long do we have to Notify Security that Control

Room AND Relay Room doors will be opened.

Answer 17

BEFORE 15 minutes have elapsed.

Question 18

What action may be required if security can not support manning the Control Room and Relay Room?

Answer 18

Waiving of Safeguards per 10CFR50.54(x) and (y) may be required.

Question 19

Why do we verify 2DFR*MOV120 is closed?

Answer 19

Backs up DW Floor drains to under RPV area in RPV pedestal to make a water volume under the RPV for “Quenching” a Meltdown….

Question 20

What sources of Fire Water are available during a SBO at Unit 2?

Answer 20

Unit 2 fire pump at Unit 1 (If power avail at Unit 1)

and Diesel Fire Pump.

Question 21

If Fire Water is available, what actions are taken?

Answer 21

• If Fire Water is available:
  ○ AND HPCS EDG is available, align Fire Water to HPCS per SOP-03 and inject with HPCS per EOP-RPV
  ○ AND HPCS is NOT available, align Fire Water to RPV per EOP-RPV & EOP 6.6

Question 22

The Turbine has Stopped Rolling, what actions should be taken?

Answer 22

If the turbine has stopped rolling, Dump H2 to roof AND Secure the EBOP

Question 23

What must be done within the first 10 minutes of a Station Blackout?

Answer 23

Start Safety Related Battery LOAD SHED

Question 24

What are the actions that should be taken associated with RCIC and how long do you have to take them?

Answer 24

BEFORE 15 minutes have elapsed:

- Defeat RCIC Isolations iaw EOP 6.2
- Place 204SW to alarm only and notify FBL

BEFORE Two hours have elapsed:
- Open all RCIC room doors

Question 25

What CAUTIONS are associated with RCIC in SOP-01?

Answer 25

CAUTIONS:
· Wide range level indication should be used to prevent a loss of RCIC at 202.3”.
· Operation with RPV pressure less than 200 psig can jeopardize RCIC availability.

Question 26

You have aligned fire water to the HPCS EDG and are injecting with HPCS. What action should be taken next as directed by the RPV INJECTION CAPABILITY leg?

Answer 26

BEFORE 30 minutes have elapsed:

Open and prop open HPCS Room doors per N2-SOP-11 Att 2. Step 3.1

Question 27

You are about to do the load shed that is required to be completed BEFORE 4 hours, what should you verify prior to doing this load shed and why?

Answer 27

Step 3.3 should only be performed after it has been determined that neither Div 1 nor Div 2 4.16 kV switchgear will be re-energized within 4 hours

This step removes control power from the EDGs.

Question 28

List the timeline for the battery load shedding iaw SOP-01

Answer 28

• Load reduction MUST begin within 10 minutes of
  identification of SBO to ensure completion within
  one hour
• BEFORE One hour has elapsed reduce SR Battery loads per N2-SOP-02, Att 3 step 3.1.
• BEFORE Two hours have elapsed reduce lighting loads per N2-SOP-02, Att 3 step 3.2.
• BEFORE Four hours have elapsed reduce SR battery loads per N2-SOP-02, Att 3 step 3.3.

Question 29

When must you begin deploying portable

generator per N2-DRP-FLEX-ELEC.

Answer 29

BEFORE Three hours have elapsed.

Question 30

What must be done before 24 hours have elapsed?

Answer 30

Power the HCVS 125 VDC system per N2-DRP-FLEX-ELEC.

Question 31

How long do you have to stop the turbine?

Answer 31

BEFORE Two hours have elapsed, Break Condenser vacuum per N2-SOP-02, Att 5. and Verify Main Turbine has stopped rolling.
THEN:
Manually open 2GMH-AOV162 to dump hydrogen from Main Generator and Place 2TML-P5(EBOP), EMERGENCY BEARING OIL PMP 5, in PULL-TO-LOCK.

Question 32

What action is required if the Fire Water System is NOT available?

Answer 32

BEFORE One hour has elapsed, Begin deployment of portable pump for RPV injection per N2-DRP-FLEX-MECH and then Operate portable pump per N2-EOP-RPV

Question 33

When do you shutdown the Plant Process Computer?

Answer 33

BEFORE One hour has elapsed
OR
Plant Process Computer panels exceed 90°F as indicated by any of the following computer points:
· CECTA01
· CECTA02
· CECTA101