ML20092F690

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Rev 7 to Procedure 18019-C, Abnormal Operating Procedure, Loss of Rhr
ML20092F690
Person / Time
Site: Vogtle Southern Nuclear icon.png
Issue date: 03/16/1990
From: Kitchens W
GEORGIA POWER CO.
To:
Shared Package
ML20092F288 List: ... further results
References
CON-IIT05-002-140-90, CON-IIT5-2-140-90, RTR-NUREG-1410 18019-C, NUDOCS 9202190469
Download: ML20092F690 (18)
v • d • e


Text

_ _ _ _ _ - _ - _ -.

App,n o Vogtle Electdc Genwating Plant a \\@'

hoc oowo Nu w.V. kiIc/w NUCLEAR OPERATIONS 18019-C n,, mon no o.i.

7 3/4lio Unit COMMON.

Georgia Po}ver no y,f 13 ABNORMAL OPERAT!flG PROCEDURE LOSS OF RESIDUAL HEAT REMOVAL PURPOSE The purpose of this procedure is to identify and correct a loss of RHR capability.

The scope of this procedure includes contingency actions for the following cases:

y A. LOSS OF RESIDUAL llEAT REMOVAL WilILE IN MODES 4 OR 5.

B. LOSS OF RESIDUAL HEAT REMOVAL WHILE IN MODE 6 (Head Removed)

SYMPTOMS Unexplained change in RHR flow or discliarge pressure.

e g

Detected RHR system excessive leakage while RHR is '.n e

operation.

?.ny unexplained raise in RCS temperature while RHR is in e

operation.

Any observed loss of RilR system capability while RHR is e

in operation.

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A.

LOSS OF RESIDUAL HEAT REMOVAL WHILE IN MODES 4 OR 5 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION During midloop operation with HL dams installed and inadequate RCS venting, a loss of RHR cooling will result in saturated RCS conditions within 10 minutes subsequently resulting in core unccvery and requiring containment closure initiation by initiating 14210, CONTAINMENT BUILDING PENETRATION VERIFICATION -

REFUELING.

NOTE e System status information on loss of RHR:

()

Figure 2 - Time to Boiling Figure 3 - Time for Core Uncovery Figure 4 - Heatup Rate e Continue performing Steps Al thru A3 until exiting this subprocedure.

A1.

Monitor Core Exit TCs.

A1.

a. IF RHR is lost while in a.

R3de 5, e

Initiate 91001-C, THEN check Core Exit TCs EMERGENCY less than 200*F.

CLASSIFICATION AND IMPLEMENTATING INSTRUCTIONS.

e Evacuate non-essential personnel and initiate Containment Isolation, e

Go to All and initiate charging for core heat removal.

O

PHoCEouRE No HlivlSloN PAGE No.

VEGP 18019-C 7

3 of 18 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

b. IP while operating at mId-loop Core Exit TC indication ic lost, THEN raise the RCS level tiTT88 f t.

3 in. (Top of Hot Leg)

AND monitor the RCS temperature with the wide range T-hot.

A2.

Check One Train Of RHR -

A2.

OPE RA'"ING.

e Suspend all operation involving a reduction of RCS boron concentration.

e IF in Mode 4 XND IF SGs are available for RUS cooling, THEN Maintain Tavg below 3TD*F by maintaining at least one SG filled in the O

NR and by using steam dumps or SG ARVs.

Go to Step A6.

f NOTE When there are indications of RHR pum l

while in Section A of this procedure,p cavitation return to Step A3.

A3.

Monitor operating RHR pump -

A3.

IF running RHR pump is NOT CAVITATING:

cavitating, THEN stop affected RHR RHR Pump Amps - NOT pump (s).

^

e FLUCTUATING.

Realign misaligned vi::.-

e Discharge flow - NORMAL in affected RHR train.

FOR RCS PRESSURE.

Discharge pressure - STABLE.

e e

HV-10465 (Train Ai e

HV-10466 (Train B' r-Go to Step AS.

(-]>

.e..,

PRocEDUAE No=

REVISiCN PACit No VEGP 18019-C 7

4 of 18

[)

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED A4.

Check Core Exit TCs -

A4.

IF Core exit TCs rising, STABLE CR LOWERING.

THEN verify affected train K and CCW flow - Normal.

Go To Appropriate UOP.

IF Flows Are Normal.

IND Core Exit TCs rising, THEN go to Step A6.

NOTE If opening the RHR HL suction valves from the QMCB is bloc'<ed due to HV-8804A or HV-8804B being disabled, the HL suction valves may be opened from the Remote Shutdown Panels.

A5.

Check Affected kHR Suction A5.

Depressurize RCS - LESS TRAN Valves - OPEN:

365 PSIG:

e HV-8701A (Train A)

a. Use Normal sprays, o

HV-8701B (Train A)

b. Use Aux Spray if letdown HV-8702A (Train B) in service.

e HV-8702B (Train B)

c. Use PRZR PORVs.

e Check IF RCS Is Above Mid-loops e

RVLIS FR level - GREATER TRAN 72% with NO RCPs l

running..

(

e Local or Remote indications - GREATER TRAN 187 FT. ELEV.

IF RCS is NOT Above rid-Loop.

THEJ go to Step A6.

IF RCS is above midloop, TREN Open RHR Loop Suction valves AND THEN go to Step A6

-OR-AND THEN go to Step A9.

O' IF neither Train RHR Suction Valves can be opened.

THEN go to Step All for alternate RCS cooling.

nu s

~~

PHoCEoVRE No.

REVISloN PAGE No.

VEGP 18019-C 7

5 of 18

()

ACTT.ON/ EXPECTED RESPONSE RESPONSE NOT OBTAINED tj0_TE If in Mode 5 it may ae necessary to vent reactor vessel l

by opening RHR suction vents or RV head vents to allow gravity flow from RWST.

A6.

Check Reactor Vessel level A6.

a. Dispatch an Operator to indications above RCS locate and isolate any mid-loop:

identified leaks.

e RVLIS FR level - GREATER

b. Adjust charg ng flow to a THAN 72% with NO RCPs closed cold eg as
Running, necessary to restore RCS l

level to 189 ft, elev.

e Local or Remote indications - GREATER

c. IP charging THAN 187 FT. ELEV.

RUT available, THEN gravity fill by initiating 13011, RESIDUAL HEAT REMOVAL SYSTEM.

(-'

d. IF Reactor Vessel Level UUT restored, THEN shut RHR Suction VaTves, one loop at a time, to isolate leak.
e. Initiate ECCS flow using o

any pumps available:

e SIPS.

e RHR in Injection Mode (depressurize RCS if necessary to obtain injection flow).

f. IF Reactor Vessel Level restored above mid loop:

e RVLIS FR level -

GREATER THAN 72% with NO RCPs running.

l e

Local or Remote indications - GREATER THAN 187 ft.

k-THEN go to Step A9.

m..s

)

PROCEDURE No.

PEVISloN PAGE Ho.

VEGP 18019-C 7

6 of 18

()

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

~

NOTE If either train of RHR becomes inoperable, shut inoperable RHR Train HL Suction valves and shut HL Cross-Connect valves HV-8716A and HV-8716B.

A7.

Start other RHR Train By A7.

IF Other Train RHR can not Initiating 13011, RESIDUAL Ee established, HEAT REMOVAL SYSTEM, with THEN go to Step A9.

flow throttled - LESS THAN 1300 GPM.

A8.

Slowly increase RHR flow to 3000 gpm, while monitoring for cavitation actions.

Return To Step A3.

A9.

IF Oaen Due To Cavitating RRR ? ump, O

THEN Shut RHR Suction Vent VdIves In Affected RHR Trains e

HV-10465 (Train A) e HV-10466 (Train B)

A10. Restart-RHR Pump With Flow A10. Go to Step All for alternate throttled - LESS THAN RCS cooling.

1300 GPM.

Slowly increase RHR flow to 3000 gpm, while monitoring for cavitation ac'.'.ons.

Return To Step A3.

All. Check if RCS Intact.

All. IF RCS manways are open.

THEN go to Step A26.

No RCS manways open.

e O

PAoCEDURE No AEvisioN

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~ ~ ~ ~

VEGP 18019-C 7

7 of 18 i

P

,.cTION/ EXPECTED RESPONSE RESPONSE NOT OBTAINED A12. Determine what alternate A12. IF RCS Temperature is RCS Cooling Is Desired:

greater than 200'F AND IF SGs are available

a. RCS Temperature - LESS for RUS cooling.

TRAN 200*F.

THEN Maintain RCS Temperature usfEg:

b. Maintain RCS cooled by maintaining PRZR level -

e Steam Dumps.

GREATER THAN 9% using:

-OR-e CCP e

SG ARVs.

-OR-IF NO SGs are available for e

IF SGs are available RUS cooling, for RCS cooling, SG THEN Open SI Accumulators AFW Feed with SGBD discharge MOVs for RCS bleed.

cooling.

A13. IF SGs are available for RCS cooling, THEN verify At Least Two SGs - GREATER THAN 17% NR.

A14. Start All CRDM Fans.

A15. Start all Containment l

Cooling Fans.

A16. Control RCS Pressure - AT 365 PSIG.

e IF PRZR has bubble, THEN operate PRZR heaters or sprays to control RCS pressure.

e IF PRZR is solid, THEN control charging and T&Tdown.

A17. Try To Start An RCP On An A17. Continue with Step A19.

Operable SG By Initiating 13003, REACTOR COOLANT PUMP OPERATION.

PRoCEDUT.E No-REVISloN PAGl No.

VEGP 18019-C 7

8 of 18

(}

ACTION / EXPECTED RESPONSE RESPONSf NOT OBYAINED A18. Initiate Repairs And Applicable Tech. Spec.

Requirements.

A19. Check Cute Exit TCs -

A19. Go to Step A21.

STABLE OR LOWERING.

A20. Continue Attempts To Start One Train RHR.

IF one train RHR started, TREN return to Step A3.

A21. Arm COPS And 0)en Both PRZR PORVs Or 'iead Vents.

A22. O erate CCPs At Required A22. Start PDP or align SI F owrate Per Figure 1.

Accumulators to establish flowrate.

Align flowpath as O

required.

i A23. Check RHR and RCP' Status -

A23. Consult TSC For Appropriate Contingency Actions.

a. RHR in operation.

-OR-

b. One RCP operating on operable SG with two SG levels - GREATER TRAN j

17% NR.

A24. Terminate RCS Bleed And Feed.

A25. Consult TSC For Appropriate UOP.

A26. Evacuate all non-essential personnel from concainment and ensure all personnel-are clear of RCS openings.

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PAoCEDUAE No-REVISloN PAGE No.

VEGP 18019-C 7

9 of 18 4

ACTION / EXPECTED RESPONSE RESPONSE NOT_OBTAINED NOTE Char ng should be directed to closed Cold Leg (s) if poss e.

A27. Control Charging Flowrate A27. Dispatch an operator to rack Using Figure 1 To Maintain in SI Accumulator's Core Heat Removal And Discharge MOV's Breakers.

l Vessel Level Above Midloop.

Open Accumulator discharge MOV's.

Continue attempts to inject borated water into RCS.

Align RWST for gravity drain,

to RCS.

A28. WHEN Reactor Vessel level Restored Above Midloop, THEN Continue Controlling O

Level And Return to Step A7.

A29. Consult TSC for recovery actions.

END OF SUB-PROCEDURE TEXT O

l MoCEDuf1E No.

5,EVIStoN b-AGE No.

VEGP 18019-C 7

10 of 18

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t B.

LOSS OF RESIDUAL HEAT REMOVAL WHILE IN MODE 6 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED Bl.

Check RCS level - ABOVE RV Bl.

Go To Section A of this FLANGE WITH CAVITY FILLED.

procedure.

B2, Suspend all operations involving a reduction of boron concentration.

B3.

Verify Hot Leg loop suction B3.

Stop affecteo RHR pump (s) valves - OPEN:

and open loop suction valves.

e HV-8701A Train A o

HV-8701B Train A HV-8702A Train B a

{v)

e HV-8702B Train B B4.

Check reactor cavity level -

B4.

Suspend all fuel movement.

GREATER TRAN 23 FEET ABOVE RV FLANGE (ELEVATION 217 FT).

B5,

a. Check for NO LOSS of RCS
a. Maintain RCS level above Inventory:

RV flange, Local Tygon tube

-OR-e steady 23 ft or more above RV flange.

Go to Section A of-this e

Remote indications 23 ft or more above RV flange,

b. Go to Step B8.

B6.

Check AUX BLDG & CNMT B6.

Stop the RHR pumps if a break leak detection system -

occurs on RHRS.

Dispatch an NORMAL.

operator to locate and isolate any leaks.

x

MoCEDURE No.

r,EVIStoN PAGE No.

VEGP 18019-C 7

11 of 18

()

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED B7.

Initiate repairs and applicable Technical Specification requirements.

B8.

IF either train of RHR Uecomes inoperable while in this section.

THEN shut inoperable train UE Euction Valves and shut HL Cross-connect Valves HV-8716A and HV-8716B.

B9.

Try to place either RHR-train in operation by initiating 13011, RESIDUAL HEAT REMOVAL SYSTEM.

B10. WHEN RHR in operation THER return to procedure in effect.

O Bil. Start all Containment Cooling Fana.

B12. Initiate 13719 SPENT FUEL POOL COOLING AND PURIFICATION SYSTEM, to place both trains in service.

B13. Place a Normal FHB HVAC train (one normal supply, one normal exhaust, and 3 recirc units) in service by initiating 13320, FUEL RANDLING BUILDING HVAC SYSTEM.

B14. Check RCS temperature -

B14. Return to Step B9.

GREATER THAN 185'F.

O

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PROCEDUAE NO-AEVISION PAGE NO.

VEGP 18019-C 7

12 of 18 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED B15. Establish RCS feed path B15. Manually start pump and from RWST:

align valves as necessary.

I e

CCPs - AT LEAST ONE IF a feedpath can NOT be RUNNING.

Titablished.

THEN return to Step B9.

-OR-e Verify valve alignment for operating pumps, i

lO lO

3 FRoCEDURE No pgy:SloN PAGE No.

VEGP 18019-C 7

13 of 18

(}

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED B16. Establish RCS bleed path:

a. Dispatch an operator to open the following valves inside CNMT:

e Drain valves on at least one RCS loop.

(At intermediate legs)

Loop 1:

1201-U4-001 1201-04-002 Loop 2:

1201-04-052 1201-U4-208 Loop 3:

1201-U4-030 1201-U4-209 Loop 4:

1201-U4-071 1201-U4-206

()

e 1901-U6-242 l

(RCDT pump suction) l

b. Dispatch an operator to l

open the following i

valves in AUX BLDG on applicable units i

UNIT 1 e

1-1901-U4-041 tRoom RA27) e 1-1901-U4-002 (Room RA49)

UNIT 2 e

2-1901-U4-041 (Room RA73) e 2-1901-U4-002 (Room RA97)

O

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<.. - - -. ~~~

VEGP 18019-C 7

14 of 18 f

9 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED B17. Operate RCDT pumps as required to maintain reactor cavity level greater than 23 feet above reactor vessel flange (elevation 217 ft) and temperature less than 185'F.

B18. Check RHR status -

B18. Return to Step B9.

AVAILABLE:

Place RHR in operation.

B19. Terminate biced and feed.

B20. Go to appropriate UOP.

O END OF PROCEDURE TEXT i

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PROCEDUAE NO.

f.EVISION PAGE NO, VEGP 18019-C 7

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FIGURE 1 - MINIMUM ECCS FLOW VERSUS TIME AFTER REACTOR SHUTDOWN l

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__ _ - _ _. _.... _ _ _ _ _ _ _. _ _ _ _ _ _ _. -... _ _. _ _ _ -.... _ - _ _ _, _ ~ - _ _ _ _. _ _. _ _ - _ - - _...

PROCEOunE NO.

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PAGE No.

VEGP 18019-C 7

16 of 18 1000.0 900.0 0

800.0 f

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700.0

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600.0 oH e

500.0 400.0 i

200.0 140'r. intact acs, na u w ter 0.0 40.0 80.0 120.0 160.0 200.0 20.0 60.0 100.0 140.0 180.0 Time After Reactor Shutdown (Hours) l

- V FIGURE 2 - TIME TO BOILING m.n

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b 3000.0 r

2000.0 0.0 40.0 80.0 120.0 1G0.0 200.0 20.0 60.0 100.0 140.0 180.0 Time After Shutdown (hours)

O FIGURE 3 - TIME FOR CORE UNCOVERY mms

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PROCEDURE NO.

REVISION PAuEHO.

7 VEC?

18019-C 7

18 of 18 9

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140'F. Intact RCS.100 SG Water 0.0 40.0 80.0 120.0 160.0 200.0 20.0 60.0 100.0 140.0 180.0 Time After Reactor Shutdown (Hours)

O FIGURE 4 - HEATUP-RATE mun e

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