ML20058E875

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Revised AOP-6.3, Loss of RHR Shutdown Cooling
ML20058E875
Person / Time
Site: Dresden, Zion  Constellation icon.png
Issue date: 09/03/1993
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20058E782 List:
References
AOP-6.3, NUDOCS 9312070209
Download: ML20058E875 (51)
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Text

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LOSS OF RHR SHUTDOWN COOLING j

A0P-6.3 TABLE CONTENTS r

i SECTION TITLE

.Pgd QA_TE REVISION Table of Contents i

SEP 03 1993-10 11 SEP 03 1993 3

A Purpose 1

SEP 03 1993

'4 B

Symptoms i

i Procedure 2

SEP 03 1993 7

3 SEP 03 1993 7

4 SEP 03 1993 7-5 SEP 03 1993 7

'6 SEP 03 1993 6

I 7~

SEP 03 1993 6

l 8

SEP 03 1993 6

9 SEP 03 1993 5

i 10 SEP 03 1993 5

11 SEP 03 1993-5 l

12 '

SEP 03 1993 6

13 SEP 03 1993 5

14 SEP 03 1993 4

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l 15 SEP 03 1993 3

Figure 1.

Time to RCS Saturation 16-SEP 03 1993 3

Versus Number of Days Since Reactor Shutdown j

Appendix A. Containment Closure 17-SEP 03 1993-

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l Periodic Precedure Review completed 05-26-91' Authorized -

For Use This procedure contains 51 pages.

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9312070209 931130 5

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PDR Q

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LOSS OF RHR SHUTDOWN COOLING A0P-6.3 TABLE CONTENTS (Continued)

SECTION TLTL[

EA_GE QAIE REVISION Appendix B. Loss of RHR at low 18 SEP 03 1993 3

Reactor Vessel Level 19 SEP 03 1993 3

20 SEP 03 1993 3

21 SEP 03 1993 3

22 SEP 03 1993 4

23 SEP 03 1993 3

24 SEP 03 1993 3

25 SEP 03 1993 3

26 SEP 03 1993 3

27 SEP 03 1993 3

28 SEP 03 1993 3

29 SEP 03 1993 3

30 SEP 03 1993 3

Appendix C. Alternate RCS Cooling 31 SEP 03 1993 3

Using SG(s) 32 SEP 03 1993 3

Appendix 0. Alternate RCS Cooling 33 SEP 03 1993 3

Using Refueling Cavity To 34 SEP 03 1993 3

Spent Fuel Pit Recirculation 35 SEP 03 1993 3

36 SEP 03 1993 1

37 SEP 03 1993 1

Appendix E. Alternate RCS Cooling 38 SEP 03 1993 1

Using Excess Letdown 39 SEP 03 1993 1

Via Manual Drair; Header 40 SEP 03 1993 1

(F/n 1)

Step 7.c 41 SEP 03 1993 1

42 SEP 03 1993 1

Appendix F. Alternate RCS Cooling 43 SEP 03 1993 1

Using Feed and Bleed 44 SEP 03 1993 1

Through Pressurizer PORVs 45 SEP 03 1993 1

46 SEP 03 1993 1

47 SEP 03 1993 1

48 SEP 03 1993 1

49 SEP 03 1993 1

Figure F1 Minimum Required Charging 50 SEP 03 1993 1

Pump Injection Flow Versus Time After Shutdown

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Figure F2, Containment Isolation 51 SEP 03 1993 1

Monitor Light Configuration Footnote 1: Commitment per 304-200-91-03903 Authorized For Use

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ZPA0PW-A0P-6.3 11 e

AOP 6.3 LOSS OF RHR SHlfTDOWN COOLING Rev. 4 SEP 031993 A. PURPOSE This procedure provides the actions required upon loss of RHR shutdown cooling to ensure prompt restoration of PHR cooling while minimizing the probability of RHR pump damage.

B. SYMPTOMS

1. Erratic or loss of RHR pump amps or flow indication.
2. Running RHR pump trips.
3. RCS to RHR suction isolation valve MOV-RH8701 or MOV-RH8702 closes.
4. Reactor vessel level indication is low.
5. RHR heat exchanger control valve HCV-606 or HCV-607 closes.
6. RHR heat exchanger control valve HCV-606. HCV-607, or HCV-618 fails open.

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I AOP-6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 7 SEP 031993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION l

  • - THERE IS NO IMMEDIATE NEED TO RESTART AN RHR PUMP UPON LOSS OF RHR FLOW. Figure 1 on page 16 provides
  • an estimate of the amount of time to RCS saturation with the RCS in a reduced inventory condition.
  • - Before starting another RHR pump. the cause of the first RHR pump failure should be determined before 4

starting the second RHR pump.

i

- The event should be classified according to EPIP 330-1 and the GSEP implemented as required.

- Refer to appropriate Tech Specs for applicable MODE:

MODE 4: Tech Spec 3.3.1.A.4.

MODE 5: Tech Spec 3.3.1.A.S.

MODE 6: Tech Spec 3.13.9.A and 3.13.9.B.

1. Check If Alternate RCS Cooling Should Be Initiated:
a. Check PZR level - LESS THAN 4%
a. Go to step 2.
b. Check estimated time to RCS
b. Initiate actions to establish saturation per Figure 1 on page 16 -

alternate RCS cooling per GREATER THAN 30 MINUTES step 9 while continuing with step 1.c.

c. Check reactor vessel level -
c. Perfonn the following while LESS THAN 588 FEET continuing with step 2:
1) ;f reactor vessel evel decreases to less than SB8 feet,
d. Actuate containment evacuation alarm

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e. Initiate containment closure per Appendix A on page 17 while continuing with step 2

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A0P 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 7 l

SEP 031993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 1

2. Check Symptoms And Go To Appropriate Step:
a. Check refueling vessel level
a. Go to step 2.c.

indicators - IN SERVICE

b. Check reactor vessel level using
b. Go to step 3.

any of the following indications -

GREATER THAN OR EQUAL TO 585.3 FT t

Refueling reactor vessel e

level recorder LR-RC22 Narrow range refueling vessel level indicator LI-RC22

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Narrow range' refueling l

e vessel level indicator LI-RC24 Direct local operator to check vessel level on local sightglass

c. Check BOTH loop A hot leg to
c. Perform the following:

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RHR pumps isolation valves - OPEN

1) Stop RHR pump (s).
2) Go to step 4.
d. Check RHR pumps - ANY RUNNING
d. Go to step 5.

l

e. Check RHR pump flow and amps - STABLE
e. Perform the following:

l

1) Stop RHR pump (s).
2) Go to step 5.
f. Check RHR flow - GREATER THAN 1000 GPM
f. Perform the following:
1) Stop RHR pump (s).
2) Go to step 5.

l

g. Check operating RHR heat
9. IE HCV 606 or HCV-607 exchanger outlet valve (s) is failed closed, and bypass return valve - THROTTLED OPEN JBQi go to step 6.

HCV-606. A HX OUTLET VLV IE HCV-606 HCV-607, or HCV 618 is failed HCV-607. B HX OUTLET VLV go to step 7.

SERVE ION AND NOTE PRECEDING t

HCV-618. RHR HX BYP LOOP RTN VLV STEP 7.

ZPA0PW-A0P-6.3 3

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l A0P 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 7 l

SEP 031993 l

l STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l

3. Actions For low Reactor Vessel Level:
a. Check reactor vessel level -
a. Go to Appendix B on page 18.

GREATER THAN 584.7 FEET

b. Check RHR pump - ANY RUNNING
b. Co to step 3.d.
c. Check RF.1 no fiow and amps - STABLE
c. Perform the following:
1) Stop RHR pump (s).
2) Direct local operator to i

vent RHR pump (s)as follows:

1

[542*AB. in RHR pump room) i a) Close RHR pump seal drain valve:

J AD-0402 (RHR pump A)

AD-0403 (RHR pump B)

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b) Open RHR pump vent valve until a solid stream of water in sightglass _is visible then close valve:

RH-8731A (RHR pump A)

RH-8731B (RHR pump B) i c) Open RHR pump seal drain valve:

AD-0402 (RHR pump A)

AD-0403 (RHR ptnp B) 4 I.

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AOP 6.3 LOSS OF RHR SHlfTDOWN COOLING Rev. 7 SEP 081993 1

i STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED j

3. (Continued) 5 i
d. Increase reactor vessel level by l

one or both of the following methods i

in the following ' referred order:

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1) Increase charging flow:

a)

Throttle open charging line flow controller FHC-121A b)

Throttle closed low pressure letdown controller PHC-131A C)

WHEN reactor vessel level is greater than or equal to 585.3 FT.

THEN perform the following:

(1) Adjust charging and letdown flow as necessary to maintain reactor vessel level stable (2) Check RHR pump - ANY RUNNING (2) Start RHR pump.

[F !Q R)R pinp starts, j

.1 go to step 5.

(3) Check RHR pump (3) Perform the following:

i flow and amps - STABLE (a) Stop RHR pump (s).

(b) Direct local operator to vent l

RHR pump (s) per 501-5A. VENTING RHR PLMPS AND RHR FLOW TRANSMITTERS.

(c) Go to step 3.e.

AND/DB 4

4 ZPADPW-ADP-6.3 5

t A0P 6.3 LOSS OF RHR SHlITDOWN COOLING Rev. 6 SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

3. (Continued)
d. 2) Switch RHR pump suction to RWST:

a) Stop any running RHR pump (s) b) Close loop A hot leg to RHR b) Close loop A hot leg to RHR l

pumps isolation valve MOV-RH8701 pumps stop valve MOV-RH8702.

c) Open RWST to RHR pumps suction valves MOV-518812A and SI8812B d) Start an RHR pump l

e) Verify RHR flow e) Perform the following:

(1) Stop RHR pump.

(2) Open MOV-RH8701 and MOV-RH8702 to gravity fill RCS.

(

f) WHEN reactor vessel level is I

greater than or equal to 585.3 FT.

TH E realign RHR pumps to RCS:

(1) Stop running RHR pump (2) Close RWST to RHR pumps suction valves MOV-SI8812A and S188128 (3) Verify open loop A hot lea (3) Open valve.

to RHR pumps isolation valves MOV-RH8701 and MOV-RH8702 g) Start an RHR pump g) Go to step 5.

e. Direct local operator to check reactor vessel level on local sightglass or check narrow range refueling vessel level indicator LI-RC24
f. Check RHR pump flow and amps - STABLE
f. Go to step 5.
g. Go to step 8 L

ZPA0PW-A0P-6.3 6

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AOP 6.3 LOSS OF RHR SHllTDOWN COOLING SEP 6 68 1993 Re STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED EQlE When RCS temperature is less than 320*F. the following leads are lifted in Auxiliary Relay Rack CB35 per GOP-4. PLANT SHUTDOWN AND C00L00WN. The lifted leads defeat the RCS high pressure auto-closure interlock for MOV-RH8701 and MOV-RH8702:

- MOV-RHS701: TB55-6 for relay PC405BX

- MOV-RH8702: TB55-2 for relay PC403BX r

Thece leads are reattached in GOP-1. PLANT HEATUP.

I

4. Actions If H0V RH8701 Or H0V-RH8702 Close:
a. Check RHR pumps - NONE RUNNING
a. Stop running RHR pump (s).
b. Check RCS status - SOLID
b. Go to step 4.d.
c. Maintain RCS pressure stable:

Control charging flow / stop charging pumps as necessary Cycle PZR heaters as necessary

d. Check RCS wide rar.ge
d. Go to step 4.e.

pressure channel PC-403 - FAILED HIGH

1) In Auxiliary Relay Rack CB35, i

relay PC403BX - LIFT LEAD ON TB55-2

2) In Auxiliary Relay Rack CB35.

relay PC403AX - INSTALL JUMPER ACROSS TB18-12 AND TB18-11

3) Initiate a Temporary Alteration tog Sheet M r ZAP 510-05
4) Go to step 4.f

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ZPA0PW-A0P-6.3 7

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AOP 6.3 LOSS OF RHR SHlfTD0WN COOLING Rev. 6

.SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

4. (Continued)
e. Chxk RCS wide range
e. Locally check for loss pressure channel PC-405 - FAILED HIGH of instrument power:
1) In Auxiliary Relay Rack C835 MOV-RH8701 - Instrument relay PC405BX - LIFT LEAD ON TB55-6 Bus 113 (213).
2) In Auxiliary Relay Rack CB35.

MOV-RH8702 - Instrument relay PC405AX - INSTALL JUMPER ACROSS Bus 111 (211).

TB55-3 AND TB55-4

3) Initiate a Temporary Alteration Log Sheet per ZAP 510-05
f. Open loop A hot leg to RHR isolation valves MOV-RH8701 and MOV-RH8702
g. Check RCS status - SOLID
g. Go to step 4.1.
h. Adjust charging line flow controller i

FHC-121A and low pressure letdown controller PHC-131A to maintain RCS pressure stable 1

Start an RHR pump

1. IF RHR pump can !!OI be started.

M 90 to step 5.

J. Check RCS status - SOLID

j. Go to step 8.
k. Adjust charging line flow controller FHC-121A and low pressure letdown controller PHC-131A to maintain RCS pressure stable

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1. Go to step 8 ZPA0PW-AbP-6.3 8

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AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 5 SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

5. Actions For RHR Ptap Trip Or Erratic RHR Pimp Flow Or Amps:'
a. Check RHR pumps - NONE RUNNING
a. Stop running RHR pump (s).
b. Check RCS status - SOLID
b. Go to step 5.d.
c. Adjust charging line flow controller FHC-121A and low pressure letdown controller PHC-131A in MAN to maintain RCS pressure stable
d. Initiate monitoring of core exit TCs
e. Check the following valves -
e. Jf HCV 606 or HCV 607 THROTTLED OPEN is failed closed.

HCV-606. A HX OUTLET VLV HCV-607. B HX OUTLET VLV JE HCV 606, HCV-607, or e

HCV-618. RHR HX BYP LOOP RTN VLV HCV-618 is failed operi, THEN go to step 7. OBSERVE I

CNifl0N AND NOTE PRECEDING i

STEP 7.

I

f. Check reactor vessel
f. Go to step 5.1.

l level recorder LR-RC22 - IN USE

g. Check reactor vessel level -
g. Go to Appendix B on page 18.

GREATER THAN 584.7 FEET

h. Direct local operator to check reactor vessel level on local sightglass
i. Verify proper RHR pump valve alignment
1. Align valves as necessary.
j. Direct local operator to vent RHR pump (s) per 501-5A. VENTING RHR PUMPS AND RHR FLOW TRANSMITTERS

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ZPAOPW-ADP-6.3 9

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AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 5 SEP OS 1993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

5. (Continued)
k. Start an RHR pump
k. Perform the following:
1) Continue attempts to restore RHR cooling.
2) Go to step 9.

OBSERVE NOTE PRECEDING STEP 9.

1. Cl.eck RCS status - SOLID
1. Go to step 5.n.

I

m. Adjust charging line flow controller FHC-121A and low pressure letdown controller PHC-131A to maintain RCS pressure stable
n. Check RHR pump flow and amps - STABLE
n. Perform the following:
1) Continue attempts to restore RHR cooling.

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2) Go to step 9.

OBSERVE NOTE PRECEDING STEP 9.

o. Go to step 8 l
6. Actions If HCV 606 Or HCV 607 Close:
a. Initiate monitoring of core exit TCs
b. Verify RHR flow adequate
b. Throttle open RHR heat for core cooling:

exchanger outlet valve HCV-606 or HCV-607 RCS temperature - STABLE (whichever is operable) as required to maintain RHR cooling.

e. Go to step 8 t

ZPA0PW-A0P-6.3 10 4

AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. S SEP 031993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED CAUTION To prevent damage to the RHR valve diaphragms.

air pressure applied to RHR flow control valves HCV-606. 607. and 618 must be less than 60 PSIG.

    • .t************sr******************************************

.NQTE Pertaining to RHR flow control valves:

- HCV-606. 607. and 618 are FAIL OPEN valves.

Air pressure must be applied to close the valves.

- Approximately 30 PSIG fully closes the valves.

7. Actions If HCV 606. HCV 607. Or HCV 618 Fail Open:
a. Stop running RHR pump (s)
b. Check RCS status - SOLID
b. Go to step 7.d.
c. Adjust charging line flow controller FHC-121A and low pressure letdown controller PHC-131A in MAN to maintain RCS pressure sti,ble
d. Initiate monitoring of core exit TCs
e. Investigate cause of valve failure (s)
f. Check instrument buses
f. Go to A0P-8.1. LOSS OF for failed open valves - ENERGIZED INSTRUMENT BUS while VALVE INSTRUMENT BUS HCV-607 112(212)

HCV-606 113(213)

HCV-618 113(213)

ZPA0PW-A0P-6.3 11

AOP.6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 6 SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

7. (Continued)
9. Establish local control of AFFECTED RHR valves:

[542*AB. K-23(K-17)]

1) Valve in nitrogen supply at the nitrogen bottle and regulator
2) Ad? st nitrogen regulator pressure to 50 - 60 PSIG
3) Verify the following AFFECTED hand
3) Fully back-off.

controllers are fully BACKED-0FF:

HIC-607. RHR REMOTE SHUTDOWN CONTROLLER FOR HCV-RH607 HIC-618. RHR REMOTE SHUTDOWN CONTROLLER FOR HCV-RH618 HIC-606. RHR REMOTE SHUTDOWN e

CONTROLLER FOR HCV-RH606

4) Place the following AFFECTFD valves under pressure gauges to LOCAL:

RH-0208. CONTROL AIR SUPPLY e

TO HCV-RH607 RH-0209. CONTROL AIR SUPPLY e

TO HCV-RH618 RH-0207. CONTROL AIR SUPPLY e

TO HCV-RH606

5) Direct second local operator to verify positive control of AFFECTED RHR valves by monitoring valve motion

[560*AB M-21(M-19) under RHR HXs]

6) Close HCV-606. HCV-607. or HCV-618 as necessary to restart RHR pump (s) k ZPA0PW-A0P-6.3 12

A0P 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 5 SEP 031993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

7. (Continued)
h. Start an RHR pump
h. Return to step 5.
1. Check RCS status - SOLID
1. Go to step 7.k.
j. Adjust charging line flow controller FHC-121A and low pressure letdown controller PHC-131A to maintain RCS pressure stable
k. Throttle HCV-606. HCV-607, and HCV-618 as necessary to establish required RHR flow
1. Check cause of RHR valve failure -
1. Return to step 7.1.

CORRECTED i

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2PA0PW-A0P-6.3 13 e

A0P 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 4 SEP 08 393 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

7. (Continued)
m. Return AFFECTED valve control to Control Room:

[542*AB. K-23(K-17)]

1) Place the following AFFECTED valves under pressure gauges to CONTROL ROUM:

RH-0208. CONTROL AIR SUPPLY TO HCV-RH607 RH-0209. CONTROL AIR SUPPLY TO HCV-RH618 RH-0207. CONTROL AIR SUPPLY TO HCV-RH606

2) Direct second local operator to verify positive control of AFFECTED RHR valves by monitoring valve motion

[560'AB. M-21(M-19) under RHR HXs)

3) Back off nitrogen bottle regulator

~

4) Isolate nitrogen supply at the nitrogen bottle and regulator
n. Throttle HCV-606, 607, or 618 as necessary to establish required RHR flow
8. Check If Containment Closure May Be Terminated:
a. RHR pumps - ANY RUNNING
a. Return to Step 1.
b. RCS temperature - LESS THAN 140*F
b. Exit this procedure.
c. RCS temperature - STABLE OR DECREASING
c. Exit this procedure,
d. Terminate containment closure
e. Exit this procedure ZPAOPW-A0P-6.3 14

AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 3 SEP 031993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l

l

- RCS temperature must be greater than 210*F to use l

Appendix C. ALTERNATE RCS COOLING USING SG(S).

l

- The refueling cavity must be flooded to greater than or equal to 612 FEET - 2 INCHES to use Appendix D.

ALTERNATE RCS COOLING USING REFUELING CAvlTY TO SPENT FUEL PIT RECIRCULATION.

- RCS temperature must be less than 200*F to use Appendix E. ALTERNATE RCS COOLING USING EXCESS LETDOWN VIA MANUAL DRAIN HEADER.

- Containment Integrity should be established to use Appendix F. ALTEf:NATE RCS COOLING USING BLEED AND FEED THROUGH THE PRESSURIZER PURVS.

I

9. At Direction Of Licensed Shift Supervisor.

(

Select An Alternate RCS Cooling Method In The Following Preferred Order:

a. Alternate RCS cooling using SG(s) per Appendix C on page 31 2
b. Alternate RCS cooling using refueling cavity to spent fuel pit recirculation per Appendix D on page 33 2
c. Alternate RCS cooling using excess letdown via manual drain header per Appendix E on page 38 l

m

d. Alternate RCS cooling using bleed and feed through PZR PORVs per Appendix F on page 43

-FINAL-k ZPA0PW-ADP-6.3 15

1 1

1 A0P 6.3 LOSS OF RHR SHUTIXMN COOLING Rev. 3 SEP 031993 i

i i

100 95 TIME TO SATURATION "

j (MINUTES)

/

so

/

p 75 Rx Level At 589' initial Temp 100*

j 70 f.

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35 Rx 1.evel At 585'

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j initial Temp 100*

! !/A l f',f 1

2e Rx Level At 585'

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Initial Temp 120*

15 10 I

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a is a so e a e a ao as see sie is no se em see is se em me TIME AFTER SHUTDOWN (DAYS)

TIME TO RCS SATURATION VERSES NUMBER OF DAYS SINCE REACTOR SHUTDOWN

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FIGURE 1 ZPA0PW-A0P-6.3 16 o-

AOP-6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 3 SEP 081993 4

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX A 1

CONTAINMENT CLOSURE CAUTION Containment closure must be completed within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> *

  • of loss of RHR cooling.
1. Verify Fuel Building Ventil1ation Align fuel Building ventilation Routed Through Charcoal Filters to charcoal mode per 501-71M.

SHIFTING AUXILIARY BUILDING VENTILATION TO CHARCOAL FILTERS.

Section 5.1.

2. Isolate Containment Purge System:
a. Verify containment purge
a. Close valves, and vent valves - CLOSED A0V-RV0001

A0V-RV0002 A0V-RV0005 e

e A0V-RV0003 ADV-RV0006 e

e

b. Verify containment purge
b. Stop fans.

and mini-purge fans - STOPPED

3. Close Containment Stanp Discharge Valves FCV WD17A And FCV WD178
4. Initiate Containment Closure Per i

MI 8. CONTAINMENT CLOSURE LIST OF OPEN CONTAINHENT PENETRATIONS HQIE When the highest core exit TC temperature reaches 200*F.

the reactor vessel level sightglass watch should be l

abandoned except as authorized by Shift Engineer.

5. Direct Security To Verify All Personnel Have Evacuated Containment Exc Those Authorized for Entry By Shift E ineer

-FINAL-(

ZPA0PW-A0P-6.3 17 s

i A0P 6.3 LOSS OF RHR SHUTDOWN COOLING Re SEPd.33 1993 i

l t

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX B LOSS OF RHR WHILE OPERATING AT MID-LOOP CONDITIONS CAUTION Changes in RCS pressure could result in inaccuracies

  • in RCS level indications.

1 l

1. Check If Rm Pumps Should Be Stopped:
a. RHR pumps - ANY RUNNING
a. Go to step 2.

l

b. RHR flow - LESS THAN 1500 GPM
b. Adjust RHR heat exchanger outlet and loop bypass valves HCV-606. HCV-607, and HCV-618 to reduce RHR flow to between -

1000 and 1500 GPM.

i

c. RHR pump amps and/or flow -
c. Go to ADP 6.3, step 3.c.

FLUCTUATING OR OSCILLATING

d. Stop RHR pump (s) l
2. Isolate Letdown Paths:

i

a. Check letdown orifice stop
a. Close valves.

valves A0V-VC8149A. B. and C - CLOSED

b. Check RCS letdown stop
b. Close valves.

valves LCV-RC459 and RC460 - CLOSED

c. Close RHR letdown flow control valve HCV-128
d. Verify loop drain line stop
d. Close valves.

valves A0V-VC8035A. B. C and 0 - CLOSED I

I i

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ADP 6.3 LOSS OF RHR SHUIDOWN COOLING Rev. 3 SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX B (Continued)

LOSS OF RHR WHILE OPERATING AT MID-LOOP CONDITIONS

3. Check Estimated Time To RCS Go to step 7.

OBSERVE i

Saturation Per Figure 1 On Page 16 -

CAUTION PRECEDING STEP 7.

LESS THAN 30 MINUTES 1

4. Check Containment Evacuation -

Perform the following COMPLETED OR IN PROGRESS

a. Actuate containment evacuation I

alann.

)

b. Direct Security to verify all personnel have evacuated containment except those

' authorized for entry by Shift Engineer.

I S. Check Containment Closure -

Initiate or verify in progress COMPLETED PER APPENDIX A ON PAGE 17 containment closure per Appendix A on page 17.

6. Start All Available Reactor Containment Fan Coolers In SLOW Speed i

ZPA0PW-A0P-6.3 19 8

ee

.,,wu w

. + - - - - -

R AOP 6.3 LOSS OF PJiR SHlfTDOWN COOLING

.SEP0v.381993 I

l STEP ACTION / EXPECTED RESPONSE RESPONSE NDT OBTAINED 6

APPENDIX B (Continued) i j.

LOSS OF RHR WHILE OPERATING AT MID-LOOP CONDITIONS l

l CAUTION ll

  • - Personnel working in containment should be warned of potential contamination from water spray near RCS openings before refilling the RCS.
  • - Only borated water at greater than or equal to the RCS concentration should be added to the RCS to maintain adequate shutdown margin. With the RCS at
  • reduced inventory, inadvertent dilution may occur faster than expected.
7. Check Reactor Vessel Level:

l

a. Reactor vessel level -
a. Go to step 10.

LESS THAN 585 FEET

b. Reactor vessel level -
b. Go to step 9.

LESS THAN 582.3 FEET i

i l

I 6

ZPAOPW-A0P-6.3 20 l

,re w

E

]

l AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 4 SEP 081993 STEP ACTION / EXPECTED RESPONSE-RESPONSE NOT OBTAINED APPENDIX B (Continued)

I j

LOSS OF RHR WHILE OPERATING AT MID-LOOP CONDITIONS' I

9. Refill The RCS To 585 FEET:
a. Check charging pumps - ANY RUNNING
a. Perform the following:
1) Start one charging pump.

j

2) Go to step 9.d.

JE one charging pump

~

i can @l be started.

.JH 3 go to step 9.c.

b. Go to step 9.d.

l

c. Makeup to the RCS by any of the 5

q following methods:

RWST gravity feed:

1) Verify loop A hot leg to
1) Open valves.

RHR pumps isolation valves MOV-RH8701 and RH8702 - OPEN j

2) Open RWST to RHR pumps suction valves MOV-SI8812A and SI88128 VCT overpressure:
1) Check VCT makeup - AVAILABLE
1) Select another method.
2) Direct local operator to adjust VCT nitrogen regulator VC-8156 to 50 - 60 PSIG per S01-2HH.

ADJUSTING VCT PRESSURE

3) Verify VCT auto makeup
3) Control VCT level using maintains VCT level 14% - 24%

S01-2M, MANUAL MAKEUP.

E

(

ZPADPW-ADP-6.3 22 e

AOP.6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 3 l

SEP 081993 i

i i

l STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX B (Continued)

LOSS OF RHR WHILE OPERATING AT MID-LOOP CONDITIONS

9. (Continued) l
c.. Accumulator Injection:
1) Check any accumulator - FILLED
1) Select another method.
2) Direct local operator to energize l

j selected accumulator discharge stop valve.

MOV-SI8808A MCC 1371-G2(2371-D1)

MOV-SIB 808D MCC 1371-G3(2371-D2)

MOV-SI8808B HCC 1381-J2(2381-E5)

MOV-SIB 80BC MCC 1391-A4(2391-B4) 4

3) Check accumulator pressure -
3) Establish accumulator GREATER THAN 100 PSIG pressure of 100 - 200 PSIG:

1, a) Direct local operator to i

open accumlator nitrogen i

supply valves SI-8965A and B. [560 A8. H-29]

b) Open accumulator fill /

vent stop valve on 1

selected accumulator:

A0V-SIB 875A.

A0V-SI88750.

A0V-SI88758.

A0V-SI8875C.

a c) Open accumulator nitrogen i

supply valve A0V-SI8880.

1 d) Mt!$ pressure is between 100 and 200 PSIG.

It!G perform following:

d (1) Close A0V-SI8880.

il (2) Close fill valve:

ADV-S18875A.

ADV-SI8875D.

A0V-SI8875B.

(

ADV-S!8875C.

ZPA0PW-ADP-6.3 23

.-- ~

c

.,,,e,

.m-,

,,.,r

l-l AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 3 1

SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX B (Continued) l LOSS OF RHR WHILE OPERATING AT MID-LOOP CONDITIONS j

i

11. Determine If A Secondary Heat Sink Should Be Established:
a. Highest core exit TCs -
a. Go to step 12.

l GREATER THAN OR EQUAL TO 200*F i

b. SGs - ANY AVAILABLE
b. Perform the following while continuing with step 12:

SG secondary handholes and i

manways - INSTALLED

1) lE any handholes or manways i

SG primary manways - INSTALLED are removed.

RCS loop isolation valves - OPEN TH_@ select alternate SG(s).

Motor driven AFW pump (s) - AVAILABLE SG atmospheric relief valve (s) - AVAILABLE

2) 1E RCS loop stop closed.

l SG level (s) - NARROW RANGE THEN open loop stop valves i

GREATER THAN 14%

on selected SG(s).

i

3) Align AFW system per 501-10A

{

PLACING AUXILIARY FEEDWATER i

SYSTEM IN SERVICE.

l

4) Start a motor driven AFW pump per 501-108 FILLING STEAM GENERATORS WITH A l

MOTOR ORIVEN AUXILIARY FEEDWATER PUMP.

i

c. Feed SG(s) as necessary to maintain SG narrow range level between 30% and 50%
d. Verify selected SG
d. Open valve (s).

atmospheric relief valve (s) - OPEN I-ZPADPW-ADP-6.3 25 i

e

..,I

i e

AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 3 i

SEP 081993 i

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i

i APPENDIX B (Continued)

LOSS OF RHR WHILE OPERATING AT MID-LOOP CONDITIONS l

12. Vent RHR System As Necessary:
a. Time required to vent RHR system -
a. Perform the following:

LESS THAN TIME TO RCS SATURATION PER FIGURE 1 ON PAGE 16

1) Increase reactor vessel level to greater than 585.3 FEET.
2) Open RHR loop bypass return i

valve HCV-RH61B to 50%.

3) Start an RHR pump.
4) Go to step 14. OBSERVE I

CAUTION PRECEDING STEP 14.

(

b. Maintain reactor vessel level greater i

than 585 feet during vent l

c. Place the RHR pump control switches in PULL-TO-LOCK i
d. Direct local operator to vent RHR pumps as follows:

[542 AB. in RHR pump room]

1) Close RHR pump seal drain valve:

AD-0402 (RHR pump A) l AD-0403 (RHR pump B)

2) Open RHR pump vent valve until a solid stream of water is visible in sightglass then close valve:

RH-8731A (RHR pump A) l RH-8731B (RHR pump B)

3) Open RHR pump seal drain valve:

AD-0402 (RHR pump A)

AD-0403 (RHR pump B)

(

ZPA0PW-A0P-6.3 26 t

i k

-.w,,

,,,,,.--+r-

--n, w-wm---

-,-_a w

,~,-

,-- +

r-,----<-,-

l AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 3 i

SEP 031993 i

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX 3 (Continued)

LOSS OF RHR WHILE OPERATING AT HID-LOOP CONDITIONS

13. Establish Conditions To Start RHR Pump:

f

a. Check reactor vessel level -
a. Perform the following:

GREATER THAN 585 FEET

~

1) Trend core exit TCs.
2) Return to ADP 6.3, step 9 and OBSERVE NOTE PRECEDING STEP 9 while continuing with the next substep.
3) Return to step 4.
b. Check RHR pump - AVAILABLE
b. Perform the following:

l

1) Trend core exit TCs.

(

2) Return to ADP 6.3 step 9 and OBSERVE NOTE PRECEDING STEP 9 while continuing with the next substep.
3) Return to step 4.
c. Check RHR system valves aligned:
c. Align valves.

MOV-SIB 812A and 518812B - CLOSED

  • MOV-RH8701 and RH8702 - OPEN
d. Verify CC water to RHR heat exchangers:
1) RHR HX CC water outlet stop
1) Open valves.

valves MOV-CC9412A and CC9412B - OPEN

2) CC water flow through RHR HX -
2) Direct local operator to GREATER THAN 3500 GPM TO EACH HX adjust RHR HX CC flow control valves until flow is greater than 3500 GPM.

[560*AB inside RHR HX room]

HX A - CC-9507A.

HX B - CC-9507B.

k~

ZPA0PW-A0P-6.3 27 8

J

)

A0P 6.3 LOSS OF R m SHUTDOWN COOLING Rev. 3 SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDlX B (Continued)

LOSS OF RHR WHILE OPERATING AT MID-t00P CONDITIONS 1

13. (Continued)

)

e. Check core exit TCs - LESS THAN 200*F
e. Initiate makeup to the RCS using either of the following:

One charging maximum flow. pump at I-i 2

Align one SI pump:

~

1) Direct local operator to energize the available components in Table 1 below.

j

2) Open or verify open SI pump suction stop valves i

MOV-SI8923A and SI89238.

1

3) Close or' verify. closed SI pump discharge to cold leg stop valves i

MOV-SI9010A and SI9010B.

4) Open available SI pump discharge to hot leg isolation valve for the SI pump to be started:

51 PUMP V V A

M3V-9 11A.

B MOV-SI90118.

I S) Start one available j

SI pump.

J TABLE 1 l

COMPONENT UNIT 1 UNIT 2 I

]

SI Pump A Bus 147-7 Bus 247-6 SI Pump B Bus 148-7 Bus 248-6

~-

MOV-SI9011B MCC 1383B-P1 MCC 2383A-W 3

(

MOV-SI9011A MCC 1372-F3 MCC 2372-H1 L

ZPADPW-ADP-6.3 28 8

J AOP 6.3 LOSS OF RHR SHlllD0WN COOLING Rev. 3 SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l

APPENDIX B (Continued)

LOSS OF RHR WHILE OPERATING AT MID-LOOP CONDITIONS j

    • n******************************************************

CAtJTION Starting an RHR pump may cause reactor vessel level to decrease due to shrink or void collapse.

14. Restore RHR Flow:
a. Check RHR pumps - NONE RUNNING
a. Go to step 14.e.
b. Close RHR heat exchanger outlet valves HCV-606 and HCV-607
c. Close RHR heat exchanger bypass i

loop return valve HCV-618 t

d. Start one RHR pump i
e. Maintain reactor vessel level greater than or equal to 585 FEET
f. Throttle RHR heat exchanger bypass loop return valve HCV-618 to establish desired flowrate j

1

g. RHR flow - RESTORED
g. Perfom the following:
1) Trend core exit TCs.
2) Return to A0P 6.3, step 9 and OBSERVE NOTE PRECEDING STEP 9 while continuing with the next substep.
3) Return to step 4.
h. Throttle the following valves to establish the desired RCS cooldown rate:

HCV-606. A HX OLITLET VLV e

HCV-607. B HX OllTLET VLV e

HCV-618. RHR HX BYP LOOP RTN VLV e

(

ZPA0PW-A0P-6.3 29 l

i A0P 6.3 LOSS OF RHR SHtJTDOWN COOLING Rev. 3 5

SEP 081993 j

i STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX B (Continued)

LOSS OF RHR WHILE OPERATING AT MID-LOOP CONDITIONS

15. Check If RCS Makeup Should Be Reduced:
a. Highest core exit TCs - LESS THAN 200*F
a. Perform the following:
1) Continue cooling with RHR.

i j

2) Return to step 14.e.
b. Reactor vessel level -
b. Return to step 14.e.

STABLE OR INCREASING l

c. Stop any running SI pump
d. Control charging flow to maintain i

reactor vessel level greater than 1

i or equal to 585 FEET s

16. Check Highest Core Exit TCs -

Perfonn the following:

I 4

LESS THAN 140*F

a. Continue cooling with RHR.

l

b. Return to step 14.e.
17. Return To ADP-6.3. Step 8 i

3 1

i l

4

.i 1

-FINAL-(.

ZPADPW-AOP-6.3 30 e

m

,,e-

-w,w-r-.nu

-en

-..,n~-

-w,,e-,.,,r,s v-a-

e

f AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 3 SEP 031993 STEP ACTION / EXPECTE9 RESPONSE RESPONSE NOT OBTAINED l

APPENDIX C ALTERNATE RCS COOLING USING SG(S)

IfD.TE This appendix provides instructions for establishing i

alternate RCS cooling by dumping steam from available SG(s) when RCS temperature is greater than 210*F.

}

4

1. Check Average Of 10 Hottest Core Exit TCs -

Return to A0P 6.3. st 9.

GREATER THAN 210*F OBSERVE NOTE PRECEDING STEP 9.

2. Establish RCS Cooling Using SG(s):

i

a. SGs - ANY AVAILABLE
a. Perform the following while continuing with step 4:

i i

SG primary manways - INSTALLED i

RCS loop isolation valves - OPEN 1)- JE any handholes or manways l

SG secondary handholes and manways are removed.

- INSTALLED THEN select alternate SG(s) f SG atmospheric relief valve (s) - AVAILABLE i

SG level (s) - NARROW RANGE

2) ;f RCS loop stop closed, GREATER THAN 14%

~ HEN open loop stop valves i

on selected SG(s).

3) Align AFW pumps per 501-10A PLACING AUXILIARY FEEDWATER SYSTEM IN SERVICE.

l 1

4) Start a motor driven AFW pump per 501-108. FILLING STEAM GENERATORS WITH A M3 TOR DRIVEN AUXILIARY FEEDWATER PUMP.
b. Dump steam to condenser
b. Dump steam from available SG from available SG(s) atmospheric relief valve (s).

l

(

ZPA0PW-A0P-6.3 31 i

f

.a

l A0P-6.3 LOSS OF RHR SHifTDOWN COOLING Rev. 3 SEP 081993

.i STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX C (Continued) l ALTERNATE RCS COOLING USING SG(S) i CAUTION l

Cavitation of the AFW pumps may occur when the CST

  • level is less than 0.5 FEET.

ADP-4.3. INADEOUATE AUXILIARY FEEDWATER SUPPLY provides instructions for aligning SW to the AFW pumps and restorin

  • 1 i
3. Check Intact SG Levels:
a. Narrow range level - GREATER THAN 4%
a. Maintain total feed flow greater than 340 GPM until level is greater than 4%

in at least one SG.

b. Control feed flow to maintain narrow range level between 30% and 50%
4. Check Average Of 10 Hottest Core Exit TCs -

Dimp steam as necessary to l

STABLE OR DECREASING maintain core eit TCs :. table or decreasing. Return to step 3.

OBSERVE CAlfTION PRECEDING STEP 3.

IE core exit TCs can.N_QI be maintained stable or decreasing, THEN return to A0P 6.3, step 9.

OBSERVE NOTE PRECEDING STEP 9.

5. Check RHR Cooling:

i

a. RHR cooling - RESTORED
a. Return to step 2.
b. At direction of Licensed Shift Supervisor, restore steam dumps, atmospheric relief valves, and AFW pumps to normal
c. Return to A0P 6.3, step 8

-FINAL-(

L.

ZPA0PW-A0P-6.3 32 3

~. -

t l-l 4

AOP 6.3 LOSS OF RHR SHlITDOWN COOLING R

l SEP6v38 1993 4

l l

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l

t 4

l APPENDIX 0 ALTERNATE RCS COOLING USING REFUELING CAVITY TO SPENT FUEL PIT RECIRCULATION I

.N_Q.TE 2

- This appendix uses the refueling water purification j

pump to take suction from the refueling cavity and discharge to the spent fuel pit.

- The SFP cooling train in service provides cooling for the SFP. The cooler water from the SFP flows back to the refueling cavity.

1. Check If Refueling Cavity To SFP -

Return to A0P 6.3. step 9.

Recirculation Cooling Method Is OBSERVE NOTE PRECEDING STEP 9.

i Available:

I i

a. Check refueling cavity level -

GREATER THAN 612 FEET - 2 INCHES

b. SF transfer tube blind flange in containment - REMOVED i
c. SF transfer canal - FLOODED j

i

2. Check Spent Fuel Pit Cooling:
a. Check SFP cooling -
a. Establish at least one train AT LEAST ONE TRAIN IN OPERATION of SFP cooling per 501-75A.

PLACING A SPENT FUEL PIT COOLING LOOP IN SERVICE.

IF at least one train of SFP cooling can HQI be established.

IHEN return to AOP 6.3. step 9.

OBSERVE NOTE PRECEDING STEP 9.

b. Check SF transfer
b. Locally open valve.

tube gate valve - OPEN

c. SFP to SF transfer
c. Locally remove slide gate.

canal slide gate - REMOVED ZPA0PW-ADP-6.3 33 f

4 m

E-. --

i^

AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 3 SEP 081993 i

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l

2 a

APPENDIX D (Continued)

ALTERNATE RCS COOLING US!NG REFUEllNG CAVITY TO SPENT FUEL PIT RECIRCULATION

)

CAUTION j

All fuel assemblies must be removed from the l

refueling cavity area prior to establishing a drain path per the next step.

i I

3. Locally Align NON-OPERATING Spent Fuel Pit Cooling Train To Spent Fuel Pool:
a. Verify refueling water
a. Stop pump.

purification pump - STOPPED

b. Place the NON-0PERATING spent fuel pit t

pump control switch in PULL-TO-LOCK

c. Align the NON-OPERATING spent fuel pit I

cooling train per Table 2 on page 35 I

4. Align Refueling Water Purification Pump To Affected Unit Refueling Cavity:
a. Align refueling water purification pump to refueling cavity per Table 3 on page 36
b. Locally depress the refueling water i

purification pump START pushbutton d

[579'AB. K-23) i

c. Verify recirculation flow on
c. Perform the following:

local flow indicator FI-631

[592*FB. U-22 in instrument room]

1) locally stop refueling water purification pump.
2) Check valve lineup and align valves as necessary.
3) Return to step 4.b.

(

ZPADPW-A0P-6.3 34

f 1

AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 3 l

SEP 031993 i

APPENDIX 0 (Continued)

ALTERNATE RCS COOLING USitG REFUELING CAVITY TO SPENT FUEL PIT R:ECIRCULATION L

TABLE 2 - NON-0PERATING SPENT FUEL COOLING TRAIN VALVE ALIGNENT VALVE DESCRIPTION LOCATION POSITION SF-8770 Spent Fuel Pool Filter Vent 617'FB, X-23 CLOSED SF-8772 Spent Fuel Pool Filter Drain 617'FB, X-23 CLOSED SF-8771A Spent Fuel Pool Filter Outlet 617'FB, X-23 OPEN l

SF-8771B Spent Fuel Pool Filter Inlet 617'FB. X-23 OPEN SF-8765 Spent Fuel Demin Train Outlet 592*FB. U-21 OPEN Valve in #1 Hx room J.

(

l SF-8762A Spent Fuel Pit Heat Exchanger 592'FB. U-21 CLOSED Inlet Valve in SF pump room SF-8774 Spent Fuel Pump To Spent Fuel 592'FB. U-21 OPEN Demin Bypass Valve above SF pump SF-8776 Spent Fuel Pump To Spent Fuel 592'FB. U-21 OPEN Demin Stop Valve above SF pump SF-8775 Spent Fuel Demin To Spent Fuel (U1) 592*FB. U-22 CLOSED Filter Stop Valve instrument room (U2) 592*FB..U-21 in SF pump room SF-8787 Spent Fuel Demin To Refueling 590* VPC, P-99 LOCKED Cavity Isolation Valve (B5-2)

CLOSED SF-0010 Spent fuel Demin To Refueling 590*VPC, P-99 LOCKED Cavity (B5-2)

CLOSED SF-8788 Spent Fuel Demin Isolation 668* VPC below LOCKED See RP To RWST Valve grating CLOSED e

(m ZPA0PW-A0P-6.3 35 s

~

4 7 -

AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 1 SEP 031993 i

i l

l i

l APPENDIX D (Continued)

ALTERNATE RCS COOLING USING REFUELING CAVITY TO SPENT FUEL PIT RECIRCUtA R TABLE 3 - REFUELING WATER PURIFICATION PUMP VALVE ALIGNMENT VALVE DESCRIPTION LOCATION POSITION SF-8767 Refueling Cavity To Refueling 574* VPC. P-70 UNLOCKED I

Affected Water Purification Pump Suction (05-2)

OPEN Unit Unit 1 Water Purification Pump (05-2)

OPEN OSF-0011 Refueling Cavity To Refueling 574* VPC, P-70 UNLOCKED QB Containment Isolation OSF-0012 Unit 2 SF-8777 Refuel Water Purification Pump 592*AB.R-22(R-18)

CLOSED

(

Operating Discharge To SF Demin Isolation Demin valve aisle i

Train SF-8777 Refuel Water Purification Pump 592'AB.R-22(R-18)

OPEN i

a.

NON-Discharge To ST Demin Isolation Demin valve aisle Operating i

Train SF-0002 Spent Fuel Demin Influent Supply 592*AB.R-22(R-18)

CLOSED NON-Demin valve aisle t

Operating i

Train l

l l

ZPA0PW-A0P-6.3 36 8

-,.4,)

l l

A0P 6.3 LOSS OF RHR SHUTDOWN COOLING STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i

i i

APPENDIX D (Continued)

ALTERNATE RCS COOLING USING REFUELING CAVITY 10 SPENT FUEL PIT RECIRCULATION l

5. Check RCS Temperature -

Return to A0P 6.3. step 9.

I STABLE OR DECREASING OBSERVE NOTE PRECEDING STEP 9.

t

6. Check RHR Cooling:
a. RHR cooling - RESTORED
a. Perform the following:

t

1) Continue attempts to restore RHR cooling.
2) Return to step 5.
b. At direction of Licensed Shift i

Supervisor. restore refueling water

(

purification system to normal 1

c. Return to A0P 6.3, step 8 l

l l

I

-FINAL-(

ZPA0PW-A0P-6.3 37 l

l l

1 s

(

)

AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 1 SEP 081993 l

l STEP ACTION / EXPECTED RESPONSE l

RESPONSE NOT OBTAINED APPENDIX E ALTERNATE RCS COOLING USING EXCESS LETDOWN VIA MANUAL DRAIN HEADER E0.E i

- This appendix provides alternate RCS cooling using feed and bleed. Normal charging is used as the feed path and excess letdown to either the holdup tanks i

or the RWST is used as the bleeG path.

- Due to the small flowrate involved (approximately 10 GPM at an RCS pressure of 400 PSIG). excess letdown through the excess letdown heat exchanger is NOT used during this procedure.

l

1. Check Average Of 10 Hottest Core Exit TCs -

Return to AOP 6.3 step 9.

LESS B AN 200*F OBSERVE NOTE PRECEDING STEP 9.

1

2. Check RCDT Pumps - AT LEAST ONE AVAILABLE u

to p

E

3. Check Charging Pumps -

Perform one of the following:

i AT LEAST ONE AVAILABLE i

Restore a charging pump to service per 50I-28. STARTING l

A CENTRIFUGAL CHARGING PUMP.

l Z

Return to A0P 6.3. step 9.

W ERVE NOTE PRECEDING STEP 9.

(

ZPA0PW-A0P-6.3 38 8

J AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 1 SEP 081993 5

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED j

APPENDIX E (Continued) t ALTERNATE RCS COOLING USING EXCESS LETDOWN VIA MANUAL DRAIN HEAC9 1

1

- The RWST level and HUT capacity should be used to evaluate which excess letdown drain path to use.

- Either step 4.a or step 4.b should be performed Step 4.a aligns RCDT pump discharge to the HUT.

+

l Step 4.b aligns RCDT pump discharge to the RRST.

't

4. Locally Align RCDT Ptsnp Discharge By Either Method Below:
a. Align RCDT pump discharge to HUT:
1) Verify open RCDT to HUT isolation
1) Open valve.

(

valve VC-8248

[579'AB. P-20)

2) Verify closed RCDT to RWST isolation
2) Close valves, i

valves DT-9171 and SI-8911

[579'HPC. N-23 (N-17)]

i i

3) Verify closed RCDT to ABEDAT
3) Close valve.

isolation valve DT-0005

[542'AB. K-21 hy elevator)

QB

b. Align RCDT pump discharge to RWST:
1) Verify open RCDT to RWST isolation
1) Dpen valves.

valves DT-9171 and SI-8911

[579'HPC. N-23 (N-17))

2) Verify closed RCDT to HU1 isolation
2) Close valve.

i valve VC-8248

[579'AB P-20)

3) Verify closed RCDT to ABEDAT
3) Close valve.

isolation valve DT-0005

[542*AB. K-21 hy elevator)

c. Verify at least one RCDT pump
c. Place at least one switch in switch in AFTER-TRIP position AFTER-TRIP position.

[592*AB. K-13 at OLP10)

(

s ZPA0PW-A0P-6.3 39 e

^

I A0P 6.3 LOSS OF RHR SHllTDOWN COOLING Rev. 1 SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX E (Continued) s ALTERNATE RCS COOLING USING EXCESS LETDOWN VIA MANUAL DRAIN HEADER j

6. Verify Charging Flow Path:
a. Verify charging pump recirculation
a. Open valves.

i stop valves MOV-VC8110 and VC8111 - OPEN

b. Verify charging header isolation
b. Open valves.

valves MOV-VC8105 and VC8106 - OPEN

c. Verify charging line stop valve
c. Open valve.

A0V-VC8169 or A0V-VC8147 - OPEN l

d. Verify charging pump - RUNNING
d. Start one charging pump per 501-28. STARTING A CENTRIFUGAL CHARGING PUMP.

l HDIE

- RCS bleed flow to the RCDT should be maximized while maintaining RCDT level less than 80%.

i

- The next step requires communication between local operators inside containment and at the Waste Gas l

Panel OLP10.

7. Establish Excess Letdown To RCDT Via Manual Drain Header Valve:
a. Open four loop drain line stop valves A0V-RC8035A B. C. and D I
b. Verify excess letdown heat exchanger
b. Close valve.

stop valve A0V-VC8381 - CLOSED

c. Locally unlock and throttle open RCDT to drain header valve VC-8484

[568'CNHT. Z-1 (Z-34) IMB at sump]

d. Monitor RCDT level - LESS THAN 80%
d. Throttle closed RCOT to drain

[592*AB K-13 at OLP10]

header valve VC-8484 as needed to maintain RCOT level less than 80%. [660*CNMT. Z-1(Z-34]

k ZPAOPW-A0P-6.3 41 i

t I

j A0P 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 1 l

SEP 081993 l

1 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 3

APPENDIX E (Continued) l ALTERNATE RCS COOLING USING EXCESS LETDOWN VIA MANUAL DRAIN HEADER

8. Check Average Of 10 Hottest Core Exit TCs -

Perform the following:

STABLE OR DECREASING

1) At direction of Licensed Shift Supervisor, realign following systems to normal:

- Charging system.

i Letdown system.

i RCOT system.

2) Return to A0P-6.3. step 9.

OBSERVE NOTE PRECEDING STEP 9.

9. Check RHR Cooling:

(

a. RHR cooling - RESTORED
a. Perform the following:
1) Continue attempts to

'l restore RHR cooling.

l 4

2) Return to step 7.d.
b. At direction of Licensed Shift i

Supervisor, restore following systems to normal:

- Charging system i

- Letdown system

- RCDT system

c. Return to ADP 6.3. step 8 i

k

-FINAL-(

ZPA0PW-A0P-6.3 42

l,

ADP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 1 SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 4

APPENDIX F ALTERNATE RCS COOLING USING FEED AND BLEED THROUGH PRESSURIZER PORVS i

NQTE This appendix provides alternate RCS cooling using feed and bleed. One charging or SI pump with a i

suction from the RWST is the feed path. Flow through the pressurizer PORVs is the bleed path.

1. Check Containment Si:atus:

E

a. Check Containment Evacuation -
a. Perform the following:

COMPLETED OR IN PROGRESS

1) Actuate containment evacuation alarm.
2) Direct Security to verify 1

all personnel have evacuated 4

containment except those i

authorized for entry by Shift Engineer.

b. Check Containment Closure / Integrity:
b. Initiate or verify actions to set containment integrity M Check containment closure - COMPLETED initiate or verify in progress i

e E

MI-8, CONTAINMENT CLOSURE Check containment integrity - SET LIST OF OPEN CONTAINMENT e

PENETRATIONS.

c. Verify containment purge
c. Close valves, and relief valves - CLOSED A0V-RV0001 A0V-RV0002 e

A0V-RV0003 A0V-RV0004 e

e

  • ADV-RV0005
d. Check RCFCs - ANY RUNNING
d. Perform the following:
1) Start at least one RCFC in SLOW speed.
2) Go to step 2.
e. Place running RCFCs in SLOW speed x

ZPA0PW-A0P-6.3 43 e

l l

ADP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. I SEP 081993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 1

APPENDIX F (Continued) l ALTERNATE RCS COOLING USING FEED AND BLEED THROUGH PRESSURIZER PORVS i

2. Verify Instrument Air To Containment:
a. Verify instrument air compressor -
a. Start an instrument air RUNNING compressor as necessary.

1F instrument air compressor can @T be started.

THEN open IA/SA crosstie valve 1A0V-SA0305.

b. Verify instrument air
b. Open valves.

containment isolation valves FCV-IA01A and FCV-1A01B - OPEN

3. Verify All RCPs Stopped

-Stop all RCPs.

(

4. Check Charging Pumps -

Perform the following:

l AT LEAST ONE AVAILABLE

a. Restore any charging pump to service.
b. WHEN at least one charging purrp is restored to service.

THEN perform steps 5 and 6.

t c.1_F.N_Q charging pump can be restored to service, j

THEN perform the following:

1) Align and start one SI pump for injection to the RCS.

l

2) Go to step 7.

OBSERVE l

CAUTION PRECEDING STEP 7.

d. IE 151 charging (E SI pump can be restored to service, return to ADP 6.3, step 9.

VE NOTE PRECEDING STEP 9.

(

ZPA0PW-A0P-6.3 44 e

f

I AOP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. I SEP 031993 1

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED APPENDIX F (Continued)

ALTERNATE RCS COOLING USING FEED AND BLEED THROUGH PRESSURIZER PORVS e

5. Align Charging Ptap Suction To RWST:

\\

a. Open emergency makeup from RWST valves MOV-VC1120 and MOV-VC112E
b. Close VCT outlet stop valves i

LCV-VC112B and LCV-VC112C i

6. Establish RCS Feed Path Using Normal Charging Flow:
a. Verify charging pump recirculation stop
a. Open valves.

valves MOV-VC8110 and VC8111 - OPEN

b. Verify charging header isolation
b. Open valves.

I l

valves MOV-VC8105 and VC8106 - OPEN j

c. Verify charging line stop valve
c. Open valve.

A0V-VC8169 or ADV-VC8147 - OPEN

d. Verify charging pumps -
d. Start at least one charging i

AT LEAST ONE RUNNING pump per S01-28. STARTING A l

CENTRIFUGAL CHARGING PUMP.

i l

l

(

ZPA0PW-A0P-6.3 45 f

j 1

i i

A0P 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 1 SEP 031993 i

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED f

APPENDIX F (Continued)

ALTERNATE RCS COOLING USING FEED AND BLEED THROUGH PRESSURIZER PORVS l

CAUTION

  • - Establishing an RCS bleed path in the next step will
  • cause the PRT rupture disc (s) to rupture. Abnormal
  • l containment conditions occur when the discs rupture. *
  • - If instrument air is NOT established to containment.
  • t the number of pressurizer PORV cycles open and closed
  • are limited by the capacity and air pressure in the
7. Establish RCS Bleed Path:

l

a. Verify pressurizer
a. Perform the following:

(

t PORV block valves - BOTH OPEN

1) locally restore power to block valve (s) as necessary:

VALVE MC_C 1MOV-RC8000A 1381A-D1 IMOV-RC80008 1393A-F2 2MOV-RC8000A 2381A-C2 2MOV-RC8000A 2391 -J2 i

2) Open PORV block valves.
3) IE HQ block valve is open,

.T_ HEM return to AOP 6.3, step 9.

OBSERVE NOTE PRECEDING STEP 9.

i

b. Open BOTH pressurizer PORVs and
b. IE HQ PZR PORY bleed path hold switches in OPEN position can be established,

))H return to ADP 6.3.ste) 9.

OBSERVE NOTE PRECEDING STE) 9.

i t

l ZPA0PW-ADP-6.3 46 i

l

[

A0P 6.3 LOSS OF R m SHUTDOWN COOLING g

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

~

APPENDIX F (Continued)

ALTERNATE RCS COOLING USING FEED AND BLEED THROUGH PRESSURIZER PORVS

8. Check Average Of 10 Hottest Core Exit TCs -

Increase charging injection flow STABLE OR DECREASING as necessary to maintain RCS temperature stable or decreasing.

a. Increase normal charging flow.

2

b. Perform the following to establish HI HEAD SI HDR flow-
1) Open or verify open l

recirculation stop valves MOV-VC8110 and VC8111.

{

2) Open high head SI stop valves MOV-SIB 803A and i

SI8803B.

i

'3) Close charging header isolation valves MOV-VC810S and VC8106.

E

c. IF charging is N.QT in service.

l THG align and start an i

additional SI pump.

i

(

ZPA0PW-A0P-6.3 47 8

i AOP-6.3 LOSS OF RHR SHUTDOWN COOLING Rev. I SEP 031993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l

APPENDIX F (Continued)

ALTERNATE RCS COOLING USING FEED AND BLEED THROUGH PRESSURIZER PORVS I

I NQIE

- RCS pressure should be maintained less than 435 PSIG i

to satisfy RCS integrity requirements.

i

- If the RCS is water solid RCS repressurization to -

greater than 400 PSIG may occur. RCS temperatures J

must be maintained stable or decreasing while attempting to reduce RCS pressure.

9. Minimize Charging Injection Flow:
a. Verify charging pumps -
a. Perform the following:

AT LEAST ONE RUNNING

1) Continue attempts to start i

one charging pump.

2) Go to step 10.
b. Control charging injection flow to maintain PZR level - GREATER THAN 4%
c. Verify all SI pumps stopped
c. Stop any running SI pump (s).

~

d. Check RCS pressure - LESS THAN 400 PSIG
d. Perform the following:
1) Decrease charging injection flow to reduce RCS pressure while maintaining RCS

(

temperatures stable or i

decreasing.

2) Go to step 10.

j

e. Minimize charging injection flow and remain above the curve of Figure F1 on page 50 p

ZPA0PW-A0P-6.3 48 s

i

A0P 6.3 LOSS OF RHR SHUTDOWN COOLING Re SEP U.1S1993 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 1

l APPENDIX F (Continued)

ALTERNATE RCS COOLING tlSING FEED AND Bl.EED THROUGH PRES $URIZER PORVS

10. Check Containment High Range At Licensed Shift Supervisor's Radiation Monitors RT AR02 And RT AR03 -

discretion, close Phase A LESS THAN 7 R/HR containment isolation valves on systems _N2T_ required to maintain stable plant conditions.

(Refer to Figure F2 on page 51)

11. Check If Alternate RCS Cooling Required:
a. Check RHR cooling - RESTORED
a. Perform the following:

I

1) Continue attempts to restore RHR cooling.
2) Return to step 8.
b. Verify charging header recirculation
b. Open valves.

l stop valves MOV-VC8110 and VC8111 - OPEN

c. Verify all SI pumps - STOPPED
c. Stop any running SI pump (s).
d. Close BOTH pressurizer PORVs
e. Verify charging header isolation
e. Open valves.

valves MOV-VC810S and VC8106 - OPEN

f. Verify high head SI stop valves
f. Close valves.

MOV-S18803A and S188038 - CLOSED

g. Align charging pump suction to VCT:

i

1) Open VCT outlet stop valves I

LCV-VC1128 and LCV-VC112C i

1

2) Close emergency makeup from RWST valves MOV-VC112D and MOV-VC112E
h. Return to A0P-6.3, step 8 i

(

ZPA0PW-A0P-6.3 49 s

I

SEPU.1S 1993 Re AOP 6.3 LOSS OF RHR SHUTDOWN COOLING i

i APPENDIX F (Continued)

ALTERNATE RCS COOLING USING FEED AND BLEED THROUGH PRESSURIZER PORVS i

1 l

800 f

I I

700 \\

X X

i m

600 REQUIRED s

CHARGING PUMP s

l INJECTION FLOW s

l GPM 500

's s

\\

400 s

s

.t s

s 300 x

x 200 l

j 100 i

i i

s to to so 1

10 100 rest so M Hours 1

i TIMEAFTERTRIP a

a MINIMUM REQUIRED CHARGING PUMP INJECTION FLOW i

VERSUS TIE AFTER SHUTDOWN i

FIGURE F1 1

ZPA0PW-A0P-6.3 50 t

m.

ADP 6.3 LOSS OF RHR SHUTDOWN COOLING Rev. 1 SEP 081993 APPENDIX F (Continued)

ALTERNATE RCS COOLING USING FEED AND BLEED THROUGH PRESSURIZER PORVS CONTAINMENT PRESSURE HAS REMAINED LESS THAN 23 PSIG NOTE 1 Es ei E

CONTAINMENT PRESSURE HAS BEEN GREATER THAN OR EQUAL TO 23 PSIG

(

NOTE 1 li E

F SHADED m -UGHTS OFF WHITE

- UGHTS ON NOTE 1: FW isolation MOV lights are NOT required to be ON.

CONTAINMENT ISOLATION HONITOR LIGHT CONFIGURATION FIGURE F2

-FINAL-(

ZPA0PW-A0P-6.3 51 e

,

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