ML17250B134
| ML17250B134 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 04/09/1990 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17250B096 | List:
|
| References | |
| FR-I.3, NUDOCS 9004200756 | |
| Download: ML17250B134 (38) | |
Text
EOP:
FR-I.3
RESPONSE
TO VOIDS IN REACTOR VESSEL REV 3
PAGE 1 of 15 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE T SUPERINT ND T
9 "i-o EFFECTI DATE QA M NON-QA CATEGORY 1.0 REVIEWED BY:
9OOOaOO>>6 9>OOOaen PDR ADOCV OSO
.P 8 INNASTATION START:
DATE CCis<PLETED:
DATE TIME:
l
EOP FR-I.3 T!TLE:
RESPONSE
TO VOIDS IN REACTOR VESSEL REV:
3 PAGE 2 of 15 A.
PURPOSE This procedure provides actions to respond to voids in the reactor vessel head.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
ENTRY CONDITIONS This procedure is entered from:
a.
F-0.6, INVENTORY Critical Safety Function Status Tree on a YELLOW condition.
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FR-I.3
RESPONSE
TO VOIDS IN REACTOR VESSEL REV 3
~PAGE 3 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Adverse CNMT values should be used whenever CNMT pressure is greater than 4 psig or CNMT radiation is greater than 10-
~ R/hr.
1 Reset CI:
a.
Operate CI reset key switch
- b. Verify annunciator A-26, CNMT ISOLATION - EXTINGUISHED
- b. Perform the following:
- 1) Reset SI.
- 2) Operate CI reset key switch.
0
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RESPONSE
TO VOIDS IN REACTOR VESSEL REV:
3 PAGE 4 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 2 Verify Adequate SW Flow To CCW Hx
- a. Verify at least two SW pumps-RUNNING
- a. Perform the following:
- 1) Verify adequate power to operate two SW pumps (258 kw per pump).
IF NOT, THEN shed sufficient non-essential loads.
~ CNMT RECIRC fans
~ Charging pumps
~ IA compressors
~ PRZR heaters
~ Rx compartment cooling fans
~ Control rod shroud fans
- b. Verify AUX BLDG SW isolation valves OPEN
~ MOV-4615 and MOV-4734
~ MOV-4616 and MOV-4735
- 2) Ensure tvo SW pumps running.
- c. Verify CNMT RECIRC fans annunciator C-2, HIGH TEMPERATURE ALARM - EXTINGUISHED
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3 PAGE 5 of 15 STEP ACTION/EXPECTED RESPONSE
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NOT OBTAINED 3
Establish IA to CNMT:
- a. Verify non-safeguards busses energized from offsite power o
Bus 13 normal feed -
CLOSED a.
Perform the following:
- 1) Close non-safeguards bus tie breakers:
-OR-o Bus 15 normal feed - CLOSED
- b. Verify SW isolation valves to turbine building -
OPEN
~ MOV-4613 and MOV-4670
~ MOV-4614 and MOV-4664
- c. Verify at least two air compressors
- RUNNING d.
Check IA supply:
o Pressure
- GREATER THAN 60 PSIG o
Pressure
- STABLE'R INCREASING
- e. Reset both trains of XY relays for IA to CI valve AOV-5392
~ Bus 13 to Bus 14 tie
~ Bus 15 to Bus 16 tie 2)
WHEN bus 15 restored, THEN reset control room lighting.
- b. Perform the following:
- 1) Manually open valves.
- 2) Dispatch AO to reset air compressors as required.
- c. Manually start air compressors as power supply permits (75 kw each).
- d. Perform the following:
- 1) Continue'ttempts to restore IA (Refer to AP-IA.1, LOSS OP INSTRUMENT AIR).
- 2) Continue with Step 4.
WHEN IA restored, THEN do Steps 3e and f.
- f. Open IA AOV-5392
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FR-I.3
RESPONSE
TO VOIDS IN REACTOR VESSEL REV 3
PAGE 6 of 15 STEP ACTION/EXPECTED RESPONSE
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NOT OBTAINED 4
Check If Charging Flow Has Been Established:
- a. Charging pumps
- ANY RUNNING
- a. Perform the following:
- 1) IF CCW flow is lost to any RCP thermal barrier OR any RCP gl seal outlet temperature offscale high, THEN dispatch AO with key to RWST gate to close seal injection needle valve(s) to affected RCP:
- b. Charging pump suction aligned to RWST:
o LCV-112B -
OPEN o
LCV-112C - CLOSED
~ RCP A, V-300A
~ RCP B, V-300B
- 2) Ensure HCV-142 open, demand at 0%.
- b. Manually align valves as necessary.
IF LCV-112B can NOT be opened, THEN perform the following:
- 1) Verify charging pump A NOT running and place in PULL STOP.
- c. Start charging pumps as necessary and adjust charging flow to control PRZR level
- 2) Dispatch AO to locally open manual charging pump suction from RWST (V-358 located in charging pump room).
3)
WHEN V-358 open, THEN direct AO to close V-268 to isolate charging pumps B and C from VCT (V-268 located in charging pump room).
- c. Continue with Step 8.
WHEN charging can be established, THEN do Steps 5,
6 and 7.
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FR-I.3
RESPONSE
TO VOIDS IN REACTOR VESSEL REV:
3 PAGE 7 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 5
Check If Normal CVCS Operation Can Be Established
- a. Verify IA restored:
OPEN o
IA pressure
- GREATER THAN 60 PSIG
- a. Continue with Step 8.
WHEN IA
- restored, THEN do Steps 5
through 7.
b.
CCW pumps
- ANY RUNNING
- b. Perform the following:
- 1) IF any RCP fl seal outlet temperature offscale high, THEN isolate CCW to thermal barrier of affected RCP(s).
~ RCP A, MOV-749A and MOV-759A
~ RCP B, MOV-749B and MOV-759B
- c. Verify instrument bus D-ENERGIZED
- 2) Manually start one CCW pump.
- c. Energize MCC B.
IF MCC B NOT available, THEN perform the following:
- 1) Verify MCC A energized.
- 2) Place instrument bus D on maintenance supply.
6 Verify PRZR Level GREATER THAN 134 [40: adverse CNMT]
Continue with Step 8.
WHEN PRZR level increases to greater than 13X
[40X adverse CNMT], THEN do Step 7.
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RESPONSE
TO VOIDS IN REACTOR VESSEL REV:
3 PAGE 8 of 15 STEP ACTION/EXPECTED RESPONSE
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NOT OBTAINED ge 7
Establish Normal Letdown:
- a. Establish charging line flow to REGEN Hx - GREATER THAN 20 GPM
- b. Place the following switches to CLOSE:
~ Letdown orifice valves (AOV-200A, AOV-200B, and AOV-202)
~ AOV-371, letdown isolation valve
~ AOV-427, loop B cold leg to REGEN Hx
- c. Place letdown controllers TCV-130 and PCV-135 in MANUAL at 25X open
- d. Reset both trains of XY relays for AOV-371 and AOV-427 e.
Open AOV-371 and AOV-427
- f. Open letdown orifice.valves as necessary
- g. Place TCV-130 in AUTO at 105'F
- h. Place PCV-135 in AUTO at 250 psig
- i. Adjust charging pump speed and HCV-142 as necessary IF RCP seal return has been established, THEN establish excess letdown as follows:
o Place excess letdown divert
- valve, AOV-312, to NORMAL.
o Ensure CCM from excess letdown
- open, (AOV-745).
o Open excess letdown isolation valve AOV-310.
o Slowly open HCV-123 to maintain excess letdown temperature less than 195'F and pressure less than 100 psig.
o Adjust charging pump speed as necessary.
IF RCP seal return NOT established, THEN consult TSC to determine if excess letdown should be placed in service.
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RESPONSE
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3 PAGE 9 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 8 Establish Stable RCS Conditions:
a.
PRZR level - STABLE AND BETWEEN 40% AND 60%
b.
RCS pressure STABLE c.
RCS hot leg temperatures-STABLE
- a. Control charging and letdown as necessary.
- b. Energize PRZR heaters and use normal PRZR spray as necessary.
IF normal spray NOT available and letdown in service, THEN use auxiliary spray valve (AOV-296).
- c. Control steam dump and total feed flow as necessary to stabilize RCS temperature.
9 Check RCPs BOTH STOPPED Go to Step 15.
10 Check If RCS Pressure Should Be Increased:
- a. Pressure
- AT LEAST 100 PSI BELOW LIMIT ON FIGURE TECH SPEC C/D (100'F/HR)
- b. Energize PRZR heaters to increase RCS pressure by 50 psi a.
Go to Step 13.
ll Control Charging And Letdown As Necessary To Maintain PRZR Level Greater Than 134
[40%
adverse CNMT]
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FR-I.3 TITLE:
RESPONSE
TO VOIDS IN REACTOR VESSEL REV 3
PAGE 10 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 12 Check RVLIS Indication:
- a. Level (no RCPs)
- INCREASING I
- b. Level (no RCPs)
- GREATER THAN 95%
a.
Go to Step 13.
- b. Return to Step 10.
- c. Turn off PRZR heaters to stabilize RCS pressure
- d. Return to procedure and step in effect
- * * * * * * * * * * * *
- 4 * * * * * * * * * * * * * * * * * * * * * * * *
- CAUTION IF RCP SEAL COOLING HAD PREVIOUSLY BEEN LOST; THEN THE AFFECTED RCP SHOULD NOT BE STARTED PRIOR TO A STATUS EVALUATION.
13 Try To Start One RCP:
- a. Establish the folloving conditions prior to RCP start:
o PRZR level - GREATER THAN 65%
[80% adverse CNMT) o RCS subcooling based on core exit T/Cs - GREATER THAN 20'F USING FIGURE MIN SUBCOOLING
- a. IF conditions can NOT be established, THEN go to Step 15.
o Bus llA or 11B - ENERGIZED o
Refer to Attachment RCP START
- b. Start one RCP
I
EOP FR-I.3 tITLE:
RESPONSE
TO VOIDS IN REACTOR VESSEL REV 3
PAGE 11 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 14 Check RVLIS Fluid Fraction (any RCP running)
LESS THAN 97~o Go to Step 24.
15 Direct, HP To Start CNMT Hydrogen Monitors CAUTION FOLLOWING BLOCK OF AUTOMATIC SI ACTUATION, MANUAL SI ACTUATION MAY BE REQUIRED IF CONDITIONS DEGRADE.
16 Check If SI Should Be Blocked:
a.
PRZR pressure
- GREATER THAN 1750 PSIG a.
Go to Step 17.
b.
PRZR pressure
- LESS THAN 1950 PSIG
- c. Block SI
- b. Decrease PRZR pressure to less than 1950 psig using normal PRZR spray.
IF normal spray NOT available and letdown in service, THEN use auxiliary spray (AOV-296).
IF
- NOT, THEN use one PRZR PORV.
17 Record RCS Pressure and CNMT Hydrogen Concentration on Attachment VENT TIME
ii 0
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TO VOIDS IN REACTOR VESSEL REV 3
PAGE 12 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 18 Establish Following RCS Conditions:
a.
PRZR level - STABLE AND BETWEEN 40X AND 60X b.
RCS pressure STABLE c.
RCS subcooling based on core exit T/Cs -
GREATER THAN 50'F USING FIGURE MIN SUBCOOLING
- a. Control charging and letdown as necessary.
- b. Energize PRZR heaters and use normal PRZR spray as necessary.
IF normal spray NOT available and letdown in service, THEN use auxiliary spray (AOV-296).
c.
Dump steam as necessary.
0>>
d.
RCS hot leg temperatures-STABLE
- d. Control steam dump and total feed flow as necessary to stabilize RCS temperature.
19 Prepare CNMT For Reactor Vessel Venting:
- a. Verify CNMT ventilation isolation valves - CLOSED
- a. Manually close valves.
~ CNMT MINI PURGE EXH VLVs (AOV-7970, AOV-7971)
~ CNMT MINI PURGE SPLY VLVs (AOV-7445, AOV-7448)
~ CNMT AIR SAMPLE ISO VLVs (AOV-1597, AOV-1598, AOV-1599)
- b. Verify the following CNMT ventilation equipment in service:
- b. Manually start fans as power supply permits.
~ All CNMT RECIRC fans
~ One reactor compartment cooling fan
~ One control rod shroud fan
0 NI4 0
I I-
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FR-I.3 TITLE:
RESPONSE
TO VOIDS IN REACTOR VESSEL REV 3
PAGE 13 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 20 Determine Maximum Allowable Venting Time:
a.
CNMT hydrogen concentration-LESS THAN 3%
- b. Determine maximum venting time (Refer to Attachment VENT TIME)
21 Review Reactor Vessel Venting Termination Criteria:
o RCS subcooling based on core exit T/Cs
-LESS THAN 10'F USING FIGURE MIN SUBCOOLING
-OR-o PRZR level -
LESS THAN 13%
[40%
adverse CNMT]
-OR-o RCS pressure
- DECREASES BY 200 PSI
-OR-o Venting time - GREATER THAN MAXIMUM TIME CALCULATED IN STEP 20
- GREATER THAN 95%
-OR-o RVLIS fluid fraction (any RCP running)
- GREATER THAN 97%
e
FR-I.3 TITLE:
RESPONSE
TO VOIDS IN REACTOR VESSEL REV 3
PAGE 14 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION VENTING SHOULD BE STOPPED IF ANY VENTING TERMINATION CRITERION IN STEP 21 IS EXCEEDED.
NOTE:
The reactor vessel head vents should not be opened unless specifically directed by PORC.
22 Vent Reactor Vessel:
a.
Open train A Rx vessel head vent valves
~ SOV-590
~ SOV-592
- a. IF either valve fails to open, THEN close both valves and open train B valves.
~ SOV-591
~ SOV-593
- b. Any venting termination criterion -
EXCEEDED
- b. Continue venting.
WHEN any venting termination criterion is
- exceeded, THEN do Steps
- 22c, 23, 24 and 25.
- c. Close all vent valves 23 Check RVLIS 'Indication o
Level (no RCPs)
- GREATER THAN 95X Increase RCS pressure to value recorded in Step 17.
Return to Step 15.
-OR-o Fluid fraction (any RCP running)
- GREATER THAN 97X
FR-I.3
RESPONSE
TO VOIDS IN REACTOR VESSEL REV 3
PAGE 15 of 15 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 24 Check PRZR Level STABLE Control charging and letdovn as necessary to stabilize PRZR level.
25 Return To Procedure And Step In Effect
-END-
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3 PAGE 1 of 1 FR-I.3 APPENDIX LIST TITLE PAGES 1)
FIGURE MIN SUBCOOLING 2)
FIGURE TECH SPEC C/D 3)
FIGURE HYDROGEN FLOW RATE 4)
ATTACHMENT VENT TIME 5)
ATTACHMENT RCP START 6)
ATTACHMENT AUX BLDG
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FR-I.3 TITLE:
RESPONSE
TO VOIDS IN REACTOR VESSEL REV 3
PAGE 1 of 1 FIGURE MIN SUBCOOLING NOTE:
,Subcooling Margin = Saturation Temperature From Figure Below [-] Core Exit T/C Indication RCS PRESSURE (PSIG) 2500 2400 2300 2200 2100 2000 1900 1800 1700
}6oo RCS PRESSURE INCREMENTS 20 PSIG
~
r 0 I
~i
~
I
~ '
I
~
1400 1300 1200 1100 1000 900 800
~
~
.~
. I r ~
I k
~
I SUBCOOLED REGION
~
~ 4
~
~
~
I ~
~
~
700 600 500 400 300 200 100 0
~
ADVERSE CNMT NORMAL CNMT INADEQUATE SUBCOOLING REGION TEMPERATURE INCREMENTS 10'F 200 250 300 350 400 450 500 550 600 650 700 CORE EXIT SATURATION TEMPERATURE ('F)
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FR-I.3 TITLE:
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3 PAGE 1 of 1
RCS PRESSURE (PSIG) 2500 2400 FIGURE TECH SPEC C
D 2300 2200 2100 2000 1900 1800 1700 1600 1500 1400 300 200 1100 1000 900 800 700 600 500 400 RCS PRESSURE INCREMENTS 20 PSIG
~
-I-
~
60'F/HR
~
~
ACCEPTABLE REGION FOR RCS REPRESSURIZATION
~ I
~ i
'L'00 200 100 0
100'F/HR TEMPERATURE INCREMENTS 10'F 0
50 100 150 200 250 300 350 400 450 500 RCS COLD LEG TEMPERATURE ('F)
'l
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TO VOIDS IN REACTOR VESSEL REV 3
PAGE 1 of 1 HYDROGEN FLOW RATE (SCFM) 4000
\\
FLOW RATE INCREMENTS 50 SCFM 3500 CNMT HYDROGEN 3000 2500 1500 I
~
1000 500 0