ML20210F240
| ML20210F240 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 02/04/1987 |
| From: | WOLF CREEK NUCLEAR OPERATING CORP. |
| To: | |
| Shared Package | |
| ML20210F193 | List: |
| References | |
| E-3, NUDOCS 8702110035 | |
| Download: ML20210F240 (5) | |
Text
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E-3 STEAM GENERATOR TUBE RUPTURE Rev. 3 EMERGENCY OPERATING PROCEDURE E-3 STEAM GENERATOR TUBE RUPTURE A.
PURPOSE This procedure provides actions to terminate leakage of reactor coolant into the secondary system following a steam generator tube rupture.
ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 1.
Check If RCPs Should Be Stopped 2.
Identify Ruptured SG(s) 2.
Continue with Steps 5 through 12.
WHEN a.
Unexpected increase ruptured SG(s) in any SG narrow identified.
THEN J
range level perform Steps 3 & 4.
-OR-b.
High radiation from any SG sample
-OR-c.
High radiation from any SG Steamline
-OR-d.
High radiation from any SG blowdown line 3.
Isolate Flow From Ruptured SG(s) c.
Check ruptured SG(s) atmos-c.
IF atmospheric pheric steam dump - CLOSED steam dump can NOT be closed THEN locally isolate atmospheric steam dump.
4.
Check Ruptured SG (s) Level b.
Control feed flow to b.
IF narrow range maintain narrow range level still level between 4%.
increases, THEN throttle feed flow to zero or isolate 8702110035 B70204 feed flow to PDR ADOCK05000g82 ruptured SG(s).
ATTACHMENT 5, -
4
- ~
- E-3' STEAM GENERATOR TUBE' RUPTURE.
Rev. 3
.m 1 ACTION / EXPECTED RESPONSE
' RESPONSE NOT OBTAINED 5.
- Check PZR PORVs And Block Valves 6-Check If SGs Are Not Faulted-7.
Check Intact SG Levels b.
Control-feed flow to maintain narrow range level between 4% and 50%.
8.
Reset SI 9.
Reset CISA and CISB 1.
Establish Instrument Air 0
To Containment
.11.
Verify All AC Buses -
ENERGIZED BY OFFSITE POWER
- 12.
Check if RHR Pumps Should Be Stopped 13.
Check Ruptured SG(s)
~
Pressure - GREATER THAN 615 PSIG 14.
Init'iate RCS Cooldown
'a.
Determine required RCS temperature.
b.
Dump steam to condenser b.
Manually or
-from intact SG(s) at locally dump steam maximum rate, at maximum rate from intact SG(s)
(1)
Use atmospheric steam dumps
-OR-(2)
Dump steam through TD-AFP on RECIRC.
.s-c.
Core exit TCs or RCs wide range RTD's - LESS THAN REQUIRED TEMPERATURE O
d.
Stop RCS cooldown.
ATTACHMENT 5 E-3 STEAM GENERATOR TUBE RUPTURE Rev. 3 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 15.
Check Ruptured SG(s)
Pressure - STABLE OR INCREASING 16.
Check RCS Subcooling -
PRESSURE AND TEMPERATURE WITHIN PERMISSABLE RANGE 17.
Depressurize RCS To Minimize Break Flow and Refill PZR 18.
Depressurize RCS Using PZR PORV To Minimize Break Flow And Refill PZR a.
PZR PORV - AT LEAST ONE AVAILABLE b.
Open one PZR PORV until ANY of the following conditions satisfied:
(1)
BOTH of the following (a) RCS pressure -
LESS THAN RUPTURED SG(s)
PRESSURE
-AND-(b) PZR level - GREATER THAN 5%
-OR-(2)
PZR level - GREATER THAN 80%
(3)
RCS subcooling j
c.
Close PZR PORV 19.
Check RCS Pressure -
INCREASING ATTACHMENT 5 ---
E-3 STEAM. GENERATOR. TUBE RUPTURE-Rev. 3 7:
ACTION /EXPECIED RESPONSE RESPONSE NOT.OBTAINED 20.
Check If SI Flow Should Be Terminated a.
RCS subcooling b.
Secondary heat sink
.c.-
RCS Pressure - STABLE 1
OR INCREASING 21.
Stop ECCS Pumps And Place In Standby a.
SI Pumps b.
All but one CCP 22.
Establish 70 GPM Charging Flow 23.
Isolate BIT 24.
Control Charging Flow To Maintain Pressurizer Level 25.
Verify ECCS Flow Not Required 26.
Check VCT Makeup Control
[.
System 27.
Check If Letdown Can Be Established 28.
i-29.
Control RCS Pressure And l
Makeup Flow To Minimize l
RCS - To - Secondary Leakage 30.
Check If Diesel Generators Should Be Stopped 31.
Minimize Secondary System Contamination i
1 ATTACHMENT 5,.. -... - - - _ _ _
E-3 STEAM GENERATOR TUBE RUPTURE Rev. 3 32.
Turn On PZR Heaters As Necessary To Saturate PZR Water At Ruptured SG(s)
Pressure 33.
Check RCP Cooling - NORMAL 34.
Check If RCP Seal Return Flow Should Be Established 35.
Check RCP Status 36.
Check If Source Range Detectors Should Be Energized 37.
Shutdown Unnecessary Plant Equipment 38.
Go To Appropriate Post-SGTR Cooldown Method a.
Go to ES-3.1, (POST-SGTR COOLDOWN USING BACKFILL), Step 1
-OR-b.
Go to ES-3.2, (POST-SGTR COOLDOWN USING BLOWDOWN), Step 1
-OR-c.
Go to ES-3.3, (POST-SGTR COOLDOWN USING STEAM DUMP), Step 1 i
ATTACHMENT 5.
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