ML13198A452
| ML13198A452 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 06/14/2013 |
| From: | Reed D Southern Co, Southern Nuclear Operating Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NL-13-1257 FNP-2-ESP-0.4, Rev 18 | |
| Download: ML13198A452 (29) | |
Text
61141201311 :31 UNIT 2 FARLEY NUCLEAR PLANT EVENT SPECIFIC PROCEDURE FNP-2-ESP-0.4 to NL-13-1257 FNP-2-ESP-0.4 5-19-2010 Revision 18 NATURAL CIRCULATION COOLDOWN WITH ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS)
PROCEDURE USAGE Continuous Use Reference Use Information Use Approved:
David L. Reed(for)
Operations Manager REQUIREMENTS-per FNP-0-AP-6 SECTIONS ALL Date Issued: 01 / 11 / 11 S
A F
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Y R
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L-_1_3_-1_2_5~7 NATURAL CIRCULATION t OOLDOWN W11H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-O.4 TABLE OF CONTENTS Procedure Contains Number of Pages Body.................................. 21 Figure 1............................... 1 Figure 2............................... 1 Figure 3............................... 1........................... 1........................... 1 Foldout Page........................... 1 Page 1 of 1 Revision 18 to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-O.4 Revision 18 A.
Purpose This procedure provides actions to continue plant cooldown and depressurization to cold shutdown, with no accident in progress, under conditions that allow for the potential formation of a void in the upper head region without a vessel level system available to monitor void growth.
B.
Symptoms or Entry Conditions I.
This procedure is entered after completing the first ten steps of FNP-2-ESP-O.2 when the limits of FNP-2-ESP-O.2 must be exceeded ;
from the following:
- a.
FNP-2-ESP-O.2, NATURAL CIRCULATION COOLDOWN TO PREVENT REACTOR VESSEL HEAD STEAM VOIDING, step 11
- b.
FNP-2-ESP-O.2, NATURAL CIRCULATION COOLDOWN TO PREVENT REACTOR VESSEL HEAD STEAM VOIDING, step 14 Page 1 of 21
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-O.4 Revision 18 Step Action/Expected Response Response NOT Obtained II CAUTION:
[CA] To ensure proper plant response. FNP-2-EEP-O. REACTOR TRIP OR SAFETY INJECTION. must be entered upon any SI actuation.
CAUTION:
The first ten steps of FNP-2-ESP-O.2. NATURAL CIRCULATION COOLDOWN TO PREVENT REACTOR VESSEL HEAD STEAM VOIDING. must be performed before continuing with this procedure.
CAUTION:
If RCP seal cooling had previously been lost. the affected RCP should not be started prior to a status evaluation.
NOTE:
1
- FOLDOUT PAGE should be monitored continuously.
- To ensure adequate pressurizer spray. the priority for establishing RCP support conditions is 2B. 2A and then 2C.
[CAl Establish RCP support conditions.
Step 1 continued on next page.
Page 2 of 21 to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Revision 18 Step Action/Expected Response Response NOT Obtained II CAUTION:
To prevent heat exchanger damage. do not attempt restoration of RCP seal return flow unless the CCW miscellaneous header is aligned to an operating CCW loop.
1.1 Verify CCW cooling -
ESTABLISHED.
1.1.1 Verify miscellaneous header aligned.
CCW TO SECONDARY HXS
[] Q2P17MOV3047 open 1.1. 2 Verify flow indicated the On-Service train.
HX 2A(2B.2C)
CCW FLOW
[] FI 3043AA
[] FI 3043BA
[] FI 3043CA 1.2 Verify seal return flow -
ESTABLISHED.
[] Q2E21MOV8100 open
[] Q2E21MOV8112 open 1.3 Verify No.1 seal support conditions established.
in 1.3.1 Maintain seal injection flow - GREATER THAN 6 gpm.
1.3.2 Verify No.1 seal leakoff flow - WITHIN FIGURE 1 LIMITS.
1.3.3 Verify No.1 seal differential pressure -
GREATER THAN 200 psid.
1.1 Proceed to step 1.3.
Step 1 continued on next page.
Page 3 of 21 to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Revision 18 Step II Action/Expected Response I
1.4 Verify CCW - ALIGNED.
[] Q2P17HV3045 open
[] Q2P17HV3184 open 1.5 Check RCP thermal barrier -
INTACT.
[] Annunciator DD2 clear 1.6 Verify at least one RCP bus -
ENERGIZED.
[] 2A 4160 V bus
[] 2B 4160 V bus
[] 2C 4160 V bus 1.7 Check CCW to RCP oil coolers -
SUFFICIENT.
[] Annunciator DD3 clear 1.8 Check at least one RCP oil level - SUFFICIENT.
RCP 2A(2B.2C) BRG UPPER/LOWER OIL RES LO LVL
[] Annunciator HH1 clear
[] Annunciator HH2 clear
[] Annunciator HH3 clear I
I Response NOT Obtained 1.5 Verify CCW flow isolated.
[] Q2P17HV3045 closed
[] Q2P17HV3184 closed 1.6 Proceed to step 1.13.
1.7 Perform the following.
1.7.1 Verify CCW - ALIGNED.
[] Q2P17MOV3052 open CCW FROM RCP OIL CLRS
[] Q2P17MOV3046 open
[] Q2P17MOV3182 open 1.7.2 II Annunciator DD3 clear.
THEN proceed to step 1.8.
IF NOT proceed to step 1.13.
1.8 Proceed to step 1.13.
Step 1 continued on next page.
Page 4 of 21 to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Step II Action/Expected Response I
1.9 Check RCS pressure - GREATER THAN 1850 psig.
[] PI 402A
[] PI 403A 1.10 Check pressurizer level -
GREATER THAN 67%.
1.11 Check SUB COOLED MARGIN MONITOR indication - GREATER THAN 40°F SUB COOLED IN CETC MODE.
1.12 Use PRZR heaters. as necessary to saturate the pressurizer water.
PRZR HTR GROUP VARIABLE
[] 2C PRZR HTR GROUP BACKUP
[] 2A
[] 2B
[] 2D
[] 2E I
Revision 18 Response NOT Obtained I
I 1.9 II RCS within FIGURE 2 limits.
THEN proceed to step 1.10.
IF NOT. proceed to step 1.13.
1.10 Raise pressurizer level to greater than 67% using charging and letdown.
- Raise charging flow.
CHG FLOW
[] FK 122 adjusted
- Reduce letdown flow.
1.11 Raise SUB COOLED MARGIN MONITOR indication to greater than 40°F subcooled in CETC mode.
1.11.1 Dump steam at a faster rate.
Step 1 continued on next page.
Page 5 of 21 to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-O.4 Revision 18 Step Action/Expected Response Response NOT Obtained II NOTE:
Changes in RCP configuration may affect pressurizer spray flow.
1.13
[CA] IT support conditions exist to start an RCP THEN start at least one RCP.
1.13.1 Start bearing oil lift pump.
RCP OIL LIFT PUMP
[] 2B(2A.2C) 1.13.2 Check oil lift pressure indicating light - LIT.
1.13.3 Start RCP.
[] 2B(2A.2C) 1.13.4 WHEN RCP has operated one minute.
THEN stop bearing oil pump.
RCP OIL LIFT PUMP
[] 2B(2A.2C) 1.14
[CA] IT at least one RCP started.
for lift THEN go to FNP-2-UOP-2.1.
SHUTDOWN OF UNIT FROM MINIMUM LOAD TO HOT STANDBY.
Page 6 of 21 1.13 Perform the following.
a)
Continue efforts to establish RCP support conditions.
b)
WHEN support conditions exist to start an RCP.
THEN return to step 1.
c)
Proceed to step 2.
OBSERVE NOTE PRIOR TO STEP 2.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Revision 18 Step Action/Expected Response Response NOT Obtained II NOTE:
To prevent excessive pressure variations. saturated conditions should be established in the pressurizer prior to lowering pressurizer level.
2 3
Establish pressurizer level to accommodate void growth.
2.1 Check pressurizer level -
25%-35%.
2.2 Place charging flow control in manual.
CHG FLOW
[] FK 122 Reduce ReS hot leg temperature to 500°F.
3.1 Maintain RCS cold legs cooldown rate - LESS THAN 50° F /hr.
RCS COLD LEG TEMP
[] TR 410 3.2 Maintain RCS pressure -
approximately 1950 psig.
[] PI 402A
[] PI 403A 3.3 Maintain RCS cold leg temperature and pressure -
WITHIN FIGURE 3 LIMITS.
RCS COLD LEG TEMP
[] TR 410 2C(2A) LOOP RCS WR PRESS
[] PI 402A
[] PI 403A 2.1 Control charging and letdown as necessary.
Step 3 continued on next page.
Page 7 of 21 to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Revision 18 Step II 4
Action/Expected Response 3.4 Maintain pressurizer level -
STABLE AT EXISTING VALUE.
CHG FLOW
[] FK 122 manually adjusted 3.5 Check RCS hot leg temperature
- LESS THAN 500°F.
RCS HOT LEG TEMP
[] TR 413 3.6 Stop RCS cooldown.
Reduce ReS pressure to 1600 psig.
4.1 II normal letdown in service.
THEN control auxiliary spray to reduce RCS pressure.
4.2 Check RCS pressure - LESS THAN 1600 psig.
[] PI 402A
[] PI 403A 4.3 Stop RCS pressure reduction.
Page 8 of 21 Response NOT Obtained 3.5 Return to step 3.1.
4.1 Open only one PRZR PORV to reduce RCS pressure.
4.2 Return to step 4.1.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Revision 18 Step Action/Expected Response Response NOT Obtained II NOTE:
After cooldown is stopped. RCS hot leg temperatures will fall due to reduction in heat transfer rate.
_5 Reduce ReS hot leg temperature to 450°F.
5.1
[CA] Maintain RCS cold legs cooldown rate - LESS THAN 100°F IN ANY 60 MINUTE PERIOD.
RCS COLD LEG TEMP
[] TR 410 5.2 Maintain RCS pressure - STABLE AT 1600 psig.
[] PI 402A
[] PI 403A 5.3 Maintain RCS cold leg temperature and pressure -
WITHIN FIGURE 3 LIMITS.
RCS COLD LEG TEMP
[] TR 410 2C(2A) LOOP RCS WR PRESS
[] PI 402A
[] PI 403A 5.4 Maintain pressurizer level -
STABLE AT EXISTING VALUE.
CHG FLOW
[] FK122 manually adjusted 5.5 Check RCS hot leg temperatures
- LESS THAN 450°F.
RCS HOT LEG TEMP
[] TR 413 5.6 Stop RCS cooldown.
Page 9 of 21 5.5 Return to step 5.1.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Revision 18 Step II 6
Action/Expected Response
[CAl Maintain seal injection flow to each RCP 13 gpm.
SEAL WTR INJECTION
[] HIK 186 adjusted Response NOT Obtained NOTE:
With an RCS flow balance established. the magnitude of PZR level rise during any subsequent RCS depressurization is indicative of the degree of reactor vessel steam voiding.
7 Establish RCS flow balance.
7.1 Adjust charging and seal injection flow total to equal letdown and RCP seal leakoff flow total.
CHG FLOW
[] FK 122 manually adjusted SEAL WTR INJECTION
[] HIK 186 adjusted Page 10 of 21 to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Step Action/Expected Response II 8
Check when to isolate SI accumulators.
8.1 Check power to discharge valves - AVAILABLE.
2A(2B.2C) ACCUM DISCH ISO
[] Q2E21MOV8808A
[] Q2E21MOV8808B
[] Q2E21MOV8808C 8.2
[CA] WHEN RCS pressure less than 1000 psig.
THEN close all SI accumulator discharge valves.
2A(2B.2C) ACCUM DISCH ISO
[] Q2E21MOV8808A
[] Q2E21MOV8808B
[] Q2E21MOV8808C 8.3
[CA] WHEN SI accumulator discharge valves closed.
THEN open and lock accumulator discharge valve disconnects using ATTACHMENT 2.
Revision 18 Response NOT Obtained 8.1 Close accumulator discharge valve disconnects using ATTACHMENT 1.
8.2 Vent any SI accumulator that cannot be isolated.
ACCUM N2 VENT
[] HIK 936 open SI ACCUM 2A 2B 2C 2A(2B.2C) ACCUM N2 SUPP/VT ISO Q2E21HV
[] 8875A [] 8875B [] 8875C open open open Page 11 of 21 to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Step II Revision 18 Action/Expected Response Response NOT Obtained NOTE:
Reactor vessel steam voiding may occur during RCS pressure reduction.
This will cause a rapid rise in pressurizer level.
9 Reduce RCS pressure.
9.1 II normal letdown in service.
THEN control auxiliary spray to reduce RCS pressure.
9.2 WHEN RCS pressure less than 800 psig OR pressurizer level greater than 90%.
THEN stop RCS pressure reduction.
9.1 Open only one PRZR PORV to reduce RCS pressure.
NOTE:
To continue RCS pressure reduction. it may be necessary to cycle pressurizer level several times by raising and then lowering RCS pressure (in accordance with steps 9 and 10).
This will enhance reactor vessel upper head cooling.
_10 Check pressurizer level - LESS THAN 90%.
10 Page 12 of 21 Raise RCS pressure by 100 psig.
10.1 Turn on additional pressurizer heaters.
PRZR HTR GROUP VARIABLE
[] 2C PRZR HTR GROUP BACKUP
[] 2A
[] 2B
[] 2D
[] 2E 10.2 Return to step 9.
OBSERVE CAUTION PRIOR TO STEP 9.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Step II Revision 18 Action/Expected Response Response NOT Obtained NOTE:
After cooldown is stopped. RCS hot leg temperatures will fall due to reduction in heat transfer rate.
11 Reduce ReS hot leg temperatures to 400°F.
11.1 Maintain RCS cold legs cooldown rate - LESS THAN 100°F IN ANY 60 MINUTE PERIOD.
RCS COLD LEG TEMP
[] TR 410 11.2 Maintain RCS pressure - STABLE AT 800 psig.
[] PI 402A
[] PI 403A 11.3 Maintain RCS cold leg temperature and pressure -
WITHIN FIGURE 3 LIMITS.
RCS COLD LEG TEMP
[] TR 410 2C(2A) LOOP RCS WR PRESS
[] PI 402A
[] PI 403A 11.4 Maintain pressurizer level -
STABLE AT EXISTING VALUE.
CHG FLOW
[] FK 122 manually adjusted 11.5 Check RCS hot leg temperatures
- LESS THAN 400°F.
RCS HOT LEG TEMP
[] TR 413 11.6 Stop RCS cooldown.
Page 13 of 21 11.5 Return to step 11.1.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Step Action/Expected Response II I 12 13 Maintain seal injection flow to each Rep 13 gpm.
SEAL WTR INJECTION
[] HIK 186 adjusted Establish ReS flow balance.
13.1 Adjust charging and seal injection flow total to equal letdown and RCP seal leakoff flow total.
CHG FLOW
[] FK 122 manually adjusted SEAL WTR INJECTION
[] HIK 186 adjusted Revision 18 Response NOT Obtained I
I NOTE:
Reactor vessel steam voiding may occur during RCS pressure reduction.
This will cause a rapid rise in pressurizer level.
14 Reduce ReS pressure.
14.1 II normal letdown in service.
THEN control auxiliary spray to reduce RCS pressure.
14.2 WHEN RCS pressure less than 600 psig OR pressurizer level greater than 90%.
THEN stop RCS pressure reduction.
Page 14 of 21 14.1 Open only one PRZR PORV to reduce RCS pressure.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Revision 18 Step II NOTE:
_15 Action/Expected Response Response NOT Obtained To continue RCS pressure reduction. it may be necessary to cycle pressurizer level several times by raising and then lowering RCS pressure (in accordance with steps 14 and 15).
This will enhance reactor vessel upper head cooling.
Check pressurizer level - LESS THAN 90%.
15 Page 15 of 21 Raise RCS pressure by 100 psig.
15.1 Turn on additional pressurizer heaters.
PRZR HTR GROUP VARIABLE
[] 2C PRZR HTR GROUP BACKUP
[] 2A
[] 2B
[] 2D
[] 2E 15.2 Return to step 14.
OBSERVE CAUTION PRIOR TO STEP 14.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Step II Revision 18 Action/Expected Response Response NOT Obtained NOTE:
After cooldown is stopped. RCS hot leg temperatures will fall due to reduction in heat transfer rate.
_16 Reduce ReS hot leg temperatures to 350°F.
16.1 Maintain RCS cold legs cooldown rate - LESS THAN 100°F IN ANY 60 MINUTE PERIOD.
RCS COLD LEG TEMP
[] TR 410 16.2 Maintain RCS pressure - STABLE AT 600 psig.
[] PI 402A
[] PI 403A 16.3 Maintain RCS cold leg temperature and pressure -
WITHIN FIGURE 3 LIMITS.
RCS COLD LEG TEMP
[] TR 410 2C(2A) LOOP RCS WR PRESS
[] PI 402A
[] PI 403A 16.4 Maintain pressurizer level -
STABLE AT EXISTING VALUE.
CHG FLOW
[] FK 122 manually adjsuted 16.5 Check RCS hot leg temperatures
- LESS THAN 350°F.
RCS HOT LEG TEMP
[] TR 413 16.6 Stop RCS cooldown.
Page 16 of 21 16.5 Return to step 16.1.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Step Action/Expected Response II I 17 18 Maintain seal injection flow to each Rep 13 gpm.
SEAL WTR INJECTION
[] HIK 186 adjusted Establish ReS flow balance.
18.1 Adjust charging and seal injection flow total to equal letdown and RCP seal leakoff flow total.
CHG FLOW
[] FK 122 manually adjusted SEAL WTR INJECTION
[] HIK 186 adjusted Revision 18 Response NOT Obtained I
I NOTE:
Reactor vessel steam voiding may occur during RCS pressure reduction.
This will cause a rapid rise in pressurizer level.
_19 Reduce ReS pressure.
19.1 II normal letdown in service.
THEN control auxiliary spray to reduce RCS pressure.
19.2 WHEN RCS pressure less than 350 psig OR pressurizer level greater than 90%.
THEN stop RCS pressure reduction.
Page 17 of 21 19.1 Open only one PRZR PORV to reduce RCS pressure.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Step II Revision 18 Action/Expected Response Response NOT Obtained NOTE:
To continue RCS pressure reduction. it may be necessary to cycle pressurizer level several times by raising and then lowering RCS pressure (in accordance with steps 19 and 20).
This will enhance reactor vessel upper head cooling.
_20 21 Check pressurizer level - LESS THAN 90%.
Check if RHR system can be placed in service.
21.1 Check RCS hot leg temperatures
- LESS THAN 350°F.
RCS HOT LEG TEMP
[] TR 413 21.2 Check RCS narrow range pressure - LESS THAN 350 psig.
[] PI 402B
[] PI 403B 21.3 Place RHR system in service using FNP-2-S0P-7.0. RESIDUAL HEAT REMOVAL SYSTEM.
20 Page 18 of 21 Raise RCS pressure by 100 psig.
20.1 Turn on additional pressurizer heaters.
PRZR HTR GROUP VARIABLE
[] 2C PRZR HTR GROUP BACKUP
[] 2A
[] 2B
[] 2D
[] 2E 20.2 Return to step 19.
OBSERVE CAUTION PRIOR TO STEP 19.
21.1 Return to step 16.
21.2 Return to step 19.
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Revision 18 Step II 22 Action/Expected Response
[CAl Continue RCS cooldown to cold shutdown with RHR.
Response NOT Obtained CAUTION:
Reactor vessel steam voiding may occur if the RCS is depressurized before the entire RCS is cooled to less than 200°F.
_23
[CAl Continue cooldown of inactive portion of RCS.
23.1 Maintain RCS pressure -
350-400 psig.
[] PI 402B
[] PI 403B 23.2 Verify both CRDM CLG FANs -
STARTED.
23.3 Continue dumping steam from all SGs.
Page 19 of 21 to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-0.4 Step II 24 Action/Expected Response Check if RCS depressurization is permitted.
Revision 18 Response NOT Obtained NOTE:
FNP-2-S0P-68.0. INADEQUATE CORE COOLING MONITORING SYSTEM provides detailed operating instructions for the core exit T/C monitor.
24.1 Check reactor vessel upper head temperature - LESS THAN 200 0 F.
CORE EXIT THERMOCOUPLE MONITOR
[] TRAIN A (Points 22.23)
[] TRAIN B (Points 16.20) 24.2 Check all atmospheric relief valves - OPEN.
2A(2B.2C) MS ATMOS REL VLV
[] PC 3371A
[] PC 3371B
[] PC 3371C 24.3 Locally check SGs - NOT STEAMING.
24.4 Go to FNP-2-UOP-2.2. SHUTDOWN OF UNIT FROM HOT STANDBY TO COLD SHUTDOWN.
-END-Page 20 of 21 24.1 Return to step 22.
24.2 Perform the following.
24.2.1 Direct counting room to perform FNP-0-CCP-64S. MAIN STEAM ABNORMAL ENVIRONMENTAL RELEASE.
24.2.2 Open all atmospheric relief valves.
2A(2B.2C) MS ATMOS REL VLV
[] PC 3371A
[] PC 3371B
[] PC 3371C 24.3 Return to step 22.
to NL-13-1257 6/14/2013 11 :31 FNP-2-ESP-O.4 No.1 Seal Differential Pressure (PSID. See Note 1)
NATURAL CIRCULATION COOLDOWN WITH ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS)
Revision 18 2400 2250 LLUU 2000 1800 1600 1400 1200 1000 800 600 400 200 0
FIGURE 1 NO. 1 SEAL NORMAL OPERATING RANGE
~
~---- --~------ ------- ~------ ~------: ------
J /
/
No rma 1
/
Operating Range f
L
/
/
/
/
/ /
, /
I I
I I.
o.2 1
234 No.1 Seal Leak Rate (GPM) 5 Note 1: For No.1 Seal Differential Pressures greater than 400 psid. use ReS pressure in psig.
6
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61141201311:31 NATURAL CIRCULATION t OOLDOWN W11H ALLOWANCE FOR FNP-2-ESP-O.4 REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS)
Revision 18 FIGURE 2 RCP PRESSURE-TEMPERATURE OPERATING LIMITS 1800 1700 J
I 1600 I
1500 I
1400 1300 1200
/
1100 ReS Acceptable
/
Pressure 1000 Rep
/
Operation (psig) 900
/
800
/
700
/
600
/
500 V
400
/
/
300 200 100 0
0 100 200 300 400 500 600 ReS Hot Leg Temperature (O F)
T
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E I
3 t NL 13 1257 ncosure 0
61141201311:31 NATURAL CIRCULATION ! OOLDOWN W~H ALLOWANCE FOR FNP-2-ESP-O.4 REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS)
Revision 18 FIGURE 3 UNIT 2 TECH. SPEC. LIMIT RCS COOLDOWN RCS Pressure 2500 (n.i::J 2250 I
I 2000 I
I I
1750 Unacceptable I
Operati on I
1500 I
I J
I Acceptable 1250 I
Operati on I
1000 I
J J
750 Cooldown Rate
/
100°F/HR J,
500 250 Min. RCS Boltup Temp.=75°F 0
I I
I 0
50 100 150 200 250 300 350 400 450 500 RCS Cold Leg Temperature (OF) to NL-13-1257
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NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-O.4 Revision 18 Step II 1
2 3
Action/Expected Response Close the following disconnects.
ATTACHMENT 1 Response NOT Obtained
'B' Train Disconnects Disconnect TPNS No.
Description Q2RI8B03S-B Disconnect FV-S2 MOV 8808B-B Position Key Location ON 139' hall way-v-s outside elec.
penetration room
'A' Train Disconnects Disconnect TPNS No.
Description Q2RI8B031-A Disconnect FU-Z3 MOV 8808C-A Position Key Location ON V-6 139' hall way-
~---------+---------------------------+--------r---~outside Q2RI8B032-A Disconnect FU-Z2 MOV 8808A-A Verify accumulator discharge valves MCB indication -
POWER AVAILABLE.
2A(2B.2C) ACCUM DISCH ISO
[] Q2E21MOV8808A
[] Q2E21MOV8808B
[] Q2E21MOV8808C Notify control room of accumulator discharge valve disconnect status.
-END-Page 1 of 1 ON V-4 counting room
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T_~ _ TT~ ~ to NL-13-1257 61141201311 :31 FNP-2-ESP-O.4 NATURAL CIRCULATION tO~L!O~ W~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS)
Revision 18 Step Action/Expected Response Response NOT Obtained II 1
2 Open and lock the following disconnects.
ATTACHMENT 2
'A' Train Disconnects Disconnect Description Position TPNS No.
Q2RI8B031-A Disconnect FU-Z3 MOV 8808C-A LOCKED OPEN Q2RI8B032-A Disconnect FU-Z2 MOV 8808A-A LOCKED OPEN
'B' Train Disconnects Key V-6 V-4 Disconnect TPNS No.
Description Position Key Q2RI8B035-B Disconnect FV-S2 MOV 8808B-B LOCKED OPEN Notify control room of accumulator discharge valve disconnect status.
-END-Page 1 of 1 V-5 Location 139 ' hallway-outside counting room Location 139' hallway-outside elec.
penetration room to NL-13-1257
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NATURAL CIRCULATI~ - B8Eiol~GW~H ALLOWANCE FOR REACTOR VESSEL HEAD STEAM VOIDING (WITHOUT RVLIS) 61141201311 :31 FNP-2-ESP-O.4 Revision 18 Step II 1
1.1 2
2.1 Action/Expected Response I
Monitor SI criteria.
Greater than 16°F subcooled in CETC mode and PRZR level above 4%.
Monitor switchover criteria.
CST level greater than 5.3 ft.
I I
Response NOT Obtained 1.1 Verify SI actuated AND go to FNP-2-EEP-O.