OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains
AREA – TG UNIT - 3/4/5/6
A
TS-II/OPN/OI /TG/ / 041 REV 0.00
Date : 25/ 02/2009
PURPOSE:This document document is prepared to guide guide the operating operating personnel for managing the turbine side drains drains during a unit startup , shutdown & normal operating condition in stage- II of NTPC /TSTPS .
B
SCOPE: :This shall be applicable to all the 4 units of stage - II , TSTPS ( 4 X 500 MW Units ) .
C
INTRODUCTION : Drains play an important role in any system charged with steam . This is basically provided to drain out the condensate before charging steam in a pipeline & subsequently allows sufficient flow in the line for initial warm up . Also this allows to drain the condensate during cooling of any pipeline .Normally the big headers like MS /CRH / HRH are provided with drain pots where the condensate is expected to collect & subsequently they are drained by operation of these drain valves . To avoid human interventions some of the drains depending on their location & importance severity they are interlocked with certain logics or instruments like level switches & so on . If the condensate is not properly drained & steam is charged into a line , then it will lead to severe hammering in the line causing major damages & sometime forced outage of the units due to failure of the support system . Hence due care is to be taken while operating these drains . Each Motor Operated drain is provided with a manual isolating i solating valve for isolation of the drain valve depending on requirement . But in case of MAW 11 drain valve no isolation valve is provided . However a bypass line with 6-10 mm orifice is provided for continuous bleeding .Some systems are provided with orifice operated continuous drains for continuous bleeding of steam /condensate .At some places drains are provided with steam drain traps which should always be be kept in service service .
D
TECHNICAL DATA OF THE SYSTEM The Following drains are provided in the turbine system of stage - II Units .
Sl No
Manual Isolation Valve Open provided
Down Stream Temp Point Provided
ATMOSPHERIC DRAINS MS LINE Drain at TG “0” Mtr
Yes
No
CRH LINE Drain at TG “0” Mtr
Yes
No
HRH LINE Drain at TG “0” Mtr
Yes
No
CRH Drain Before NRV at TG “0” Mtr
Yes
No
LPBP line 1& 2 Drain at TG “0” Mtr
Yes
No
UFT vent line drain at TG “0” Mtr
Yes
No
MS 401
IBD TANK ( 02 nos ) MS line L Drain before MSSV ( Left )
Yes
No
MS402
MS line R Drain before MSSV ( Right )
Yes
No
BP 101
UNIT FLASH TANK ( 08 nos ) HPBP Drain ( Left )
Yes
No
Valve Tag
Description of Valve •
01. 02. 03. 04. 05. 06.
•
07. 08.
•
09.
Sheet 1 Of 7 Prepared By
Reviewed By
Approved By
NTPC/TSTPS
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains
AREA – TG UNIT - 3/4/5/6
10. 11. 12. 13. 14. 15. 16.
REV 0.00
Date : 25/ 02/2009
BP 102
HPBP Drain ( Right )
Yes
No
MS 419
MS Line Drain Before Strainer
Yes
No
MS 101
MS Strainer Drain ( Left )
Yes
Yes
MS 102
MS Strainer Drain ( Right )
Yes
Yes
HRH 101
HRH Strainer Drain ( Left )
Yes
Yes
HRH 102
HRH Strainer Drain ( Right )
Yes
Yes
HRH 604
HRH Line Hdr Drain
Yes
No
STARTUP DRAIN FLASH TANK ( 12 nos )
•
17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.
TS-II/OPN/OI /TG/ / 041
MS 105
MS Strainer Drain ( Left )
Yes
Yes
MS 106
MS Strainer Drain ( Right )
Yes
Yes
MS 417
MS Line Drain Before Strainer
Yes
Yes
CRH 101
CRH NRV Drain
Yes
NO
CRH 501
CRH Line Drain
Yes
NO
HRH 105
HRH Strainer Drain ( Left )
Yes
Yes
HRH 106
HRH Strainer Drain ( Right )
Yes
Yes
HRH 606
HRH Line Drain Before Strainer
Yes
NO
LP 625
LPBP Line Drain ( Left )
Yes
NO
LP 624
LPBP Line Drain ( Right )
Yes
NO
HRH 109
LPBP Warm up Line Drain ( Left )
Yes
Yes
HRH 110
LPBP Warm up Line Drain ( Right )
Yes
Yes
EX 105
HP DRAIN FLASH TANK ( 13 nos ) Extraction to HPH 5 A / 5 B Line Drain
Yes
AS 122
Turbine Gland Steam Seal Drain
Yes
Yes NO
AS 104
Aux. Steam to BFPT – A Line Drain
Yes
NO
AS 109
Aux. Steam to BFPT – B Line Drain
Yes
NO
CRH 129
CRH to BFPT – A DS Line Drain
Yes
NO
CRH 141
CRH to BFPT – B DS Line Drain
Yes
NO
CRH 135
Steam to BFPT – A Line Drain
Yes
NO
CRH 147
Steam to BFPT – B Line Drain
Yes
NO
CRH 109
CRH to DEA Pegging Line Drain
Yes
NO
CRH 116
CRH to BFPT – A Line Drain
Yes
NO
CRH 123
CRH to BFPT – B Line Drain
Yes
NO
EX 101
Extraction to HPH – 6 A Line Drain
Yes
Yes
EX 102
Extraction to HPH – 6 B Line Drain
Yes
Yes
LP DRAIN FLASH TANK ( 07 nos) CRH to DEA Pegging DS of CV Line Drain
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains
AREA – TG UNIT - 3/4/5/6
47. 48.
TS-II/OPN/OI /TG/ / 041 REV 0.00
Date : 25/ 02/2009
AS 113
S SCAPH Line Drain
Yes
NO
AS 114
P SCAPH Line Drain
Yes
NO
TURBINE DRAIN ( FLASH BOX – 1 Towards SWYD ) 06 nos
49. 50. 51. 52. 53. 54.
MAL 11
Drain Before HPCV - 1
Yes
Yes
MAL 26
Drain Before IV - 1
Yes
Yes
MAL 65
Drain Before CRH NRV
Yes
Yes
MAL 31
Drain After IV - 1
Yes
Yes
MAL 32
Drain After IV - 2
Yes
Yes
MAL 22
HP Casing Drain
Yes
Yes
TURBINE DRAIN ( FLASH BOX – 2 Towards Boiler ) 08 nos
55. 56. 57. 58. 59. 60. 61. 62.
D
MAL 12
Drain Before HPCV - 2
Yes
Yes
MAL 27
Drain Before IV - 2
Yes
Yes
MAL 47
Drain of Extraction Valve A 5
Yes
Yes
MAL 51
Drain of Extraction Valve A 4.1
Yes
Yes
MAL 52
Drain of Extraction Valve A 4.2
Yes
Yes
MAL 54
Drain of Extraction Valve A 3
Yes
Yes
MAL 81
Gland Steam Header Drain
Yes
Yes
MAL 55
Drain of Extraction Valve A 2
Yes
Yes
OPERATING INSTRUCTIONS : The following instructions are to be followed during the Unit normal operation , Unit Hot & Cold start-up & Unit shutdown conditions .
D-1
Normal Operation :Always ensure the SLC drain is kept “ ON “. Check all the Drain MOV ( Motor Operated Valve) are manually tightened and no passing is observed indicated by high temp at the down stream of the MOV checked either through online measurement or through Temp Gun at local . If the temp is maintaining very HI (Suspected Passing) then the manual valve for the MOV can be kept closed with proper record in the Log Book as well as the information to be made available in soft form . Necessary WOC to be raised for such drains .
• •
•
•
D-2
D-2.1 D-2.1.1. D-2.1.2.
Unit start-up Operation :-
Hot Start-up The Alternate drains connected to UFT are not to be opened at all such as . ( BP 101 ,BP 102,MS 419,MS 101,MS 102,HRH 101,HRH 102,HRH 604 ) Check the following turbine drains are opened as per SLC logic after the Unit Has tripped out . MAL 11 MAL 26 MAL 65 MAL 31
Drain Before HPCV - 1 Drain Before IV - 1 Drain Before CRH NRV Drain After IV - 1
MAL 12 MAL 27 MAL 47 MAL 51
Drain Before HPCV - 2 Drain Before IV - 2 Drain of Extraction Valve A 5 Drain of Extraction Valve A 4.1
Date : 25/ 02/2009 Drain of Extraction Valve A 4.2 Drain of Extraction Valve A 3 Drain of Extraction Valve A 2
Open MS/HRH Strainers drains to SDFT MS 105/106 & HRH 105/106 ( Operated from BHEL CRT ) immediately after turbine tip out . On auto these drains open at SGC Shutdown programme at step 53 . Open CRH Hdr Drain CRH 501 to SDFT . This drain actually operates on auto based on the Drain Pot Level Switch actuation . Ensure all the manual valves ( if anyone was closed ) of drains connected to the SDFT /FB-1& FB -2 / LP & HP FT are opened as per the list attached as soon the unit has tripped . Now ensure the temperatures are picking up down stream of the drain as soon as soon as steam flow established ( where ever on line measurement provided) Now as the turbine rolling started the MS/HRH Strainers drains MS 105/106 & HRH 105/106 gets closed at step 13 . After Unit is synchronisation & Load pick up is > 100 MW ensure all the following drains are closed on auto MAL 11 Drain Before HPCV - 1 MAL 12 Drain Before HPCV - 2 MAL 26 Drain Before IV - 1 MAL 27 Drain Before IV - 2 MAL 65 Drain Before CRH NRV MAL 31 Drain After IV - 1 MAL 32 Drain After IV - 2 Ensure the Extraction line drains are closed after the respective Extractions are charged . MAL 47 MAL 51
D-2.1.10.
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains
Drain of Extraction Valve A 5 Drain of Extraction Valve A 4.1
MAL 52 MAL 54 MAL 55
Drain of Extraction Valve A 4.2 Drain of Extraction Valve A 3 Drain of Extraction Valve A 2
Check all the TDBFP drains are closed after TDBFP’s are loaded .
Absolute Cold / Warm Start-up . While pulling Vacuum keep the drains connected to vacuum system closed for faster pulling of vacuum . Then slowly open one by one as per requirement . Never operate both the main & alternate drain valve simultaneously , this will lead to vacuum drop in the system . Ensure the manual valves of following drains connected to the UFT / SDFT /FB-1& FB -2 / LP & HP FT are opened as per the list attached before charging MS Line . The atmospheric drain s provided in MS /CRH / HRH line are to be kept open ( Crack ) for initial charging MS line / HP & LP Bypass system for release of condensate . They are to be closed after ensuring sufficient steam flow . The Alternate drains to UFT are to be kept open initially for better Silica control in the Unit . The Header Drains of MS/CRH/HRH Such as MS 417/419 , HRH 606/604 , CRH 501 are to be kept open till 20 % steam Flow . The MS/HRH Strainers drains MS 105/106 & HRH 105/106 are to be kept opened till rolling of TG set . Check the following turbine drains are opened as per SLC logic before TG Set Rolling MAL 11 MAL 26 MAL 65 MAL 31 MAL 32 MAL-22 MAW-11
Drain Before HPCV - 1 Drain Before IV - 1 Drain Before CRH NRV Drain After IV - 1 Drain After IV - 2 HPC drain . Seal steam supply drain
MAL 12 MAL 27 MAL 47 MAL 51 MAL 52 MAL 54 MAL 55
Drain Before HPCV - 2 Drain Before IV - 2 Drain of Extraction Valve Drain of Extraction Valve Drain of Extraction Valve Drain of Extraction Valve Drain of Extraction Valve
A5 A 4.1 A 4.2 A3 A2
Sheet 4 Of 7 Prepared By
Reviewed By
Approved By
NTPC/TSTPS AREA – TG UNIT - 3/4/5/6
D-2.2.9. D-2.2.10. D-2.2.11.
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains
TS-II/OPN/OI /TG/ / 041 REV 0.00
Date : 25/ 02/2009
The temp points provided for the major drains are functioning indicated by the rise in temp when ever steam flows in those drain . For Charging HP/LP Bypass the HPBP Warm up Line Drains Normally the drains are kept closed as soon as sufficient steam flow is established in the system . Such as Close MS Line drains to IBD ( MS401/402) once the Main MS SV are full open . Close the CRH hdr atmospheric drain after HP/LP bypass is charged & sufficient steam coming . Close the MS /HRH Hdr Drains MS 417/419 , HRH 606/604 once HP /LP bypass is charged Check the following turbine drains are opened as per SLC logic after the Unit Has tripped out . • • •
D-2.2.12.
MAL 11 MAL 26 MAL 65 MAL 31 MAL 32
D-2.2.13. D-2.2.14.
D-2.2.15.
Drain Before HPCV - 1 Drain Before IV - 1 Drain Before CRH NRV Drain After IV - 1 Drain After IV - 2
MAL 12 MAL 27 MAL 47 MAL 51 MAL 52 MAL 54 MAL 55
Drain Before HPCV - 2 Drain Before IV - 2 Drain of Extraction Valve Drain of Extraction Valve Drain of Extraction Valve Drain of Extraction Valve Drain of Extraction Valve
The MS /HRH strainer drains MS 105/106 & HRH 105/106 are automatically closed once TG set Rolling started at step 13 . After Unit is synchronisation & Load pick up is > 100 MW ensure all the following drains are closed on auto MAL 11 Drain Before HPCV - 1 MAL 12 Drain Before HPCV - 2 MAL 26 Drain Before IV - 1 MAL 27 Drain Before IV - 2 MAL 65 Drain Before CRH NRV MAL 31 Drain After IV - 1 MAL 32 Drain After IV - 2 Ensure the Extraction line drains are closed after the respective extractions are charged . MAL 47 MAL 51
Drain of Extraction Valve A 5 Drain of Extraction Valve A 4.1
MAL 52 MAL 54
Drain of Extraction Valve A 4.2 Drain of Extraction Valve A 3
D-2.2.16.
Check all the TDBFP drains are closed after TDBFP’s are loaded .
D-2.2.17.
Ensure the turbine casing drain MAL22 is closed after HPT casing temp attained > 320 0 C on auto .
D-3
A5 A 4.1 A 4.2 A3 A2
Unit Shutdown Operation :When ever the unit goes under shut down , very care full drain operation management is to be followed . Some times keeping additional drains open may lead to cooling of the turbine components . The situations will be different with vacuum being maintained or killed .
D-3.1 D-3.1.1. D-3.1.2.
If Vacuum is maintained . The SLC drain should be kept ON . As soon as the turbine is hand tripped or tipped ensure the following drains are opened on auto . MAL 11 Drain Before HPCV - 1 MAL 12 Drain Before HPCV - 2 MAL 26 Drain Before IV - 1 MAL 27 Drain Before IV - 2 MAL 65 Drain Before CRH NRV MAL 47 Drain of Extraction Valve A 5 MAL 31 Drain After IV - 1 MAL 51 Drain of Extraction Valve A 4.1 MAL 32 Drain After IV - 2 MAL 52 Drain of Extraction Valve A 4.2 Sheet 5 Of 7
Prepared By
Reviewed By
Approved By
NTPC/TSTPS AREA – TG UNIT - 3/4/5/6
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains MAL 54 MAL 55
D-3.1.3. D-3.1.4. D-3.1.5. D-3.1.6.
D-3.1.7.
D-3.2 D-3.2.1.
D-3.2.2. D-3.2.3. D-3.2.4.
D-3.2.5.
Date : 25/ 02/2009 Drain of Extraction Valve A 3 Drain of Extraction Valve A 2
As Boiler is Boxed up by closing the MS stop Valves Ensure the opening of following drains MS Strainer Drain ( Left ) MS Strainer Drain ( Right ) MS Line Drain Before Strainer CRH NRV Drain CRH Line Drain HRH Strainer Drain ( Left ) HRH Strainer Drain ( Right )
HRH 606 LP 625 LP 624 HRH 109 HRH 110
HRH Line Drain Before Strainer LPBP Line Drain ( Left ) LPBP Line Drain ( Right ) LPBP Warm up Line Drain ( Left ) LPBP Warm up Line Drain ( Right )
Ensure that the HPC drain MAL 22 has opened after HPC temp drops below 300 Ensure TDBFP drains are opened after TDBFP Tripping .
0
C.
If Vacuum is Killed . Ensure complete isolation of seal steam supply to turbine gland steam system by closing both HT/LT manual isolation valves from APRDS at APRDS level . Also the manual isolation valve at 8.5 mtr before seal steam control station manual valve is closed & the drain to UFT before it is opened . SLC Drain is “ ON “ Since MS / HRH Lines are depressurised , keep all the atmospheric drains open . The Following drains to UFT are open BP 101 HPBP Drain ( Left ) MS 102 MS Strainer Drain ( Right ) BP 102 HPBP Drain ( Right ) HRH 101 HRH Strainer Drain ( Left ) MS Line Drain Before MS 419 HRH 102 HRH Strainer Drain ( Right ) Strainer MS 101 MS Strainer Drain ( Left ) HRH 604 HRH Line Hdr Drain Ensure the following turbine drains are open on auto . MAL 11 MAL 26 MAL 65 MAL 31 MAL 32 MAL 81 MAW 11
D-3.2.6. D-3.2.7.
REV 0.00
Open MS/HRH Strainers drains to SDFT MS 105/106 & HRH 105/106 ( Operated from BHEL CRT ) immediately after turbine tip out . On auto these drains open at SGC Shutdown programme at step 53 . Open CRH Hdr Drain CRH 501 to SDFT . This drain actually operates on auto based on the Drain Pot Level Switch actuation . Ensure all the manual valves ( if anyone was closed ) of drains connected to the SDFT /FB-1& FB -2 / LP & HP FT are opened as per the list attached as soon the unit has tripped . Now ensure the temperatures are picking up down stream of the drain as soon as soon as steam flow established ( Where ever on line measurement provided)
MS 105 MS 106 MS 417 CRH 101 CRH 501 HRH 105 HRH 106 D-3.1.8. D-3.1.9.
TS-II/OPN/OI /TG/ / 041
Drain Before HPCV - 1 Drain Before IV - 1 Drain Before CRH NRV Drain After IV - 1 Drain After IV - 2 Seal steam Hdr Drain Seal steam supply drain
MAL 12 MAL 27 MAL 47 MAL 51 MAL 52 MAL 54 MAL 55
Check HPT casing drain MAL 22 is opened after temp drops < 300 Ensure all the SDFT / LPFT/ HPFT drains are open
0
Drain Before HPCV - 2 Drain Before IV - 2 Drain of Extraction Valve Drain of Extraction Valve Drain of Extraction Valve Drain of Extraction Valve Drain of Extraction Valve
A5 A 4.1 A 4.2 A3 A2
C.
Sheet 6 Of 7 Prepared By
Reviewed By
Approved By
NTPC/TSTPP
OPERATION DEPARTMENT
AREA – TG
TS-II/OPN/OI /TG/ / 041 REV 0.00
Operating Instruction For Management of Turbine Drains
Operating Instruction For Management of Turbine Drains
UNIT - 3/4/5/6
Date : 25/ 02/2009
SL
DRAIN VALVE
KKS
LOCATI
MAN
MAN
AUTO
AUTO
PROT
PROT
NO.
DESCRIPTION
CODE
ON
CLOSE
OPEN
CLOSE
OPEN
CLOSE
OPEN
15
DRAIN EXTRACTION V/V A-4.2
<100mmwc
16
17
18 19
DRAIN EXTRACTION V/V A-3
DRAIN EXTRACTION V/V A-2
WARMING UP DRAIN DRAIN BEF CRH NRV
MAL52AA011
MAL54AA011
MAL55AA011
0 M TG
0 M TG
0 M TG
Y
Y
Y
Y
Y
Y
MAW11AA011
0 M TG
Y
Y
MAL65AA011
0 M TG
Y
Y
EXTRACTION V/V A-4.2 > 15%
EXTRACTION V/V A-4.2 <5%
AND
OR
DP EXTRACTIONV/V A-4.2 >300mmwc
DP EXTRACTIONV/V A-4.2 <100mmwc
EXTRACTION V/V A-3 > 15%
EXTRACTION V/V A-3 < 5%
AND
OR
GEN LOAD >10%
GEN LOAD <2%
EXTRACTION V/V A-2 > 15%
EXTRACTION V/V A-2 < 5%
AND
OR
GEN LOAD >10% GLAND STEAM TEM BEFV/V >270(DEG.C)
GEN LOAD <2% GLAND STEAM TEM BEFV/V<250(DEG.C)
CRH NRV >100%
CRH NRV 0%
AND
OR
GEN LOAD >10%
CRH NRV <100%
NTPC/TSTPP
OPERATION DEPARTMENT
AREA – TG
TS-II/OPN/OI /TG/ / 041 REV 0.00
Operating Instruction For Management of Turbine Drains
UNIT - 3/4/5/6
Date : 25/ 02/2009
SL
DRAIN VALVE
KKS
LOCATI
MAN
MAN
AUTO
AUTO
PROT
PROT
NO.
DESCRIPTION
CODE
ON
CLOSE
OPEN
CLOSE
OPEN
CLOSE
OPEN
15
DRAIN EXTRACTION V/V A-4.2
<100mmwc
16
17
18 19
DRAIN EXTRACTION V/V A-3
DRAIN EXTRACTION V/V A-2
WARMING UP DRAIN DRAIN BEF CRH NRV
MAL52AA011
MAL54AA011
MAL55AA011
0 M TG
0 M TG
0 M TG
Y
Y
Y
EXTRACTION V/V A-4.2 > 15% AND
OR
DP EXTRACTIONV/V A-4.2 >300mmwc
DP EXTRACTIONV/V A-4.2 <100mmwc
EXTRACTION V/V A-3 > 15%
EXTRACTION V/V A-3 < 5%
Y
Y
Y
MAW11AA011
0 M TG
Y
Y
MAL65AA011
0 M TG
Y
Y
EXTRACTION V/V A-4.2 <5%
AND
OR
GEN LOAD >10%
GEN LOAD <2%
EXTRACTION V/V A-2 > 15%
EXTRACTION V/V A-2 < 5%
AND
OR
GEN LOAD >10% GLAND STEAM TEM BEFV/V >270(DEG.C)
GEN LOAD <2% GLAND STEAM TEM BEFV/V<250(DEG.C)
CRH NRV >100%
CRH NRV 0%
AND
OR
GEN LOAD >10%
CRH NRV <100% OR
GEN LOAD <2%
!
NTPC/TSTPP AREA – TG UNIT - 3/4/5/6
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains Interlocks for valves connected to
Sl No
Valve Tag
Description of Valve
Auto open
#
TS-II/OPN/OI /TG/ / 041 REV 0.00
Date : 25/ 02/2009
Flash tanks
Auto close
Protection open
CLOSE Command from GC
NIL
CLOSE Command from GC
NIL
IBD TANK ( 02 nos ) MS line L Drain before MSSV ( Left ) MS line R Drain before MSSV ( Right )
OPEN Command from GC OPEN Command from GC
NIL
BLI>10%
NIL
NIL
BLI>10%
NIL
NIL DRAIN TO SDFT
NIL
NIL
DRAIN TO SDFT OPEN
NIL
•
01.
MS 401
02.
MS402
03. 04. 05.
BP 101
UNIT FLASH TANK ( 08 nos ) HPBP Drain ( Left )
BP 102
HPBP Drain ( Right )
MS 419
MS Line Drain Before Strainer
06.
MS 101
MS Strainer Drain ( Left )
•
NTPC/TSTPP
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains
AREA – TG UNIT - 3/4/5/6
Interlocks for valves connected to
Sl No
Valve Tag
Description of Valve
Auto open
TS-II/OPN/OI /TG/ / 041 REV 0.00
Date : 25/ 02/2009
Flash tanks
Auto close
Protection open
CLOSE Command from GC
NIL
CLOSE Command from GC
NIL
IBD TANK ( 02 nos ) MS line L Drain before MSSV ( Left ) MS line R Drain before MSSV ( Right )
OPEN Command from GC OPEN Command from GC
NIL
BLI>10%
NIL
NIL
BLI>10%
NIL
NIL DRAIN TO SDFT CLOSE DRAIN TO SDFT CLOSE DRAIN TO SDFT CLOSE DRAIN TO SDFT CLOSE NIL
NIL
NIL
DRAIN TO SDFT OPEN
NIL
DRAIN TO SDFT OPEN
NIL
DRAIN TO SDFT OPEN
NIL
DRAIN TO SDFT OPEN
NIL
NIL
NIL
SGC TG STEP-14
NIL
SGC TG STEP-14
NIL
NIL
NIL
NIL COMMAND FROM GC OR CRH DRAIN POT LEVEL NOT HIGH
NIL
•
01.
MS 401
02.
MS402
03. 04. 05.
BP 101
UNIT FLASH TANK ( 08 nos ) HPBP Drain ( Left )
BP 102
HPBP Drain ( Right )
MS 419
MS Line Drain Before Strainer
06.
MS 101
MS Strainer Drain ( Left )
07.
MS 102
MS Strainer Drain ( Right )
08.
HRH 101
HRH Strainer Drain ( Left )
09.
HRH 102
HRH Strainer Drain ( Right )
10.
HRH 604
HRH Line Hdr Drain STARTUP DRAIN FLASH TANK ( 12 nos )
12.
MS 105
MS Strainer Drain ( Left )
13.
MS 106
MS Strainer Drain ( Right )
14. 15.
MS 417
MS Line Drain Before Strainer
CRH 101
CRH NRV Drain
16.
CRH 501
CRH Line Drain
17.
HRH 105
HRH Strainer Drain ( Left )
18.
HRH 106
HRH Strainer Drain ( Right )
19.
HRH 606
HRH Line Drain Before Strainer
20.
LP 625
21. 22.
•
11.
SGC TG STEP-2 OR SGC TG S/D STEP-53 SGC TG STEP-2 OR SGC TG S/D STEP-53 NIL NIL COMMAND FROM GC OR CRH DRAIN POT LEVEL HIGH SGC TG STEP-2 OR SGC TG S/D STEP-53 SGC TG STEP-2 OR SGC TG S/D STEP-53 OPEN COMMAND FROM GC
LPBP Line Drain ( Left )
LP 624 HRH 109
CRH DRAIN POT LEVEL VERY HIGH
SGC TG STEP-14
NIL
SGC TG STEP-14
NIL
CLOSE COMMAND FROM GC
NIL
NIL
NIL
NIL
LPBP Line Drain ( Right )
NIL
NIL
NIL
LPBP Warm up Line Drain ( Left )
NIL
BLI>10%
NIL
!
$
NTPC/TSTPP AREA – TG UNIT - 3/4/5/6
Sl No
23.
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains Auto open
Auto close
Protection open
HRH 110
LPBP Warm up Line Drain ( Right )
NIL
BLI>10%
NIL
HP DRAIN FLASH TANK ( 13 nos )
EX 105
Extraction to HPH 5 A / 5 B Line Drain
25.
AS 122
Turbine Gland Steam Seal Drain
26.
AS 104
Aux. Steam to BFPT – A Line Drain
AS 109
Aux. Steam to BFPT – B Line Drain
29.
30.
Date : 25/ 02/2009
Description of Valve
24.
28.
REV 0.00
Valve Tag
•
27.
TS-II/OPN/OI /TG/ / 041
CRH 129
CRH 141
CRH 135
CRH to BFPT – A DS Line Drain
CRH to BFPT – B DS Line Drain
Steam to BFPT – A Line Drain
OPEN COMMAND FROM SCM-A OR HPH-5A/5B EXT. VALVE CLOSED OR OPEN COMMMMAND FROM SCM-B SEAL STEAM INLET TEMP<250 DEG.C OPEN COMMAND FROM SCM OR BFP-A TRIPPED OR BFP-A WORKING &AUX STM TEMP<250DEG.C OPEN COMMAND FROM SCM OR BFP-B TRIPPED OR BFP-B WORKING & AUX STM TEMP<250DEG.C OPEN COMMAND FROM SCM OR BFP-A TRIPPED OR (ACV<2% AND AUX W/U VALVE OPEN) OPEN COMMAND FROM SCM OR BFP-B TRIPPED OR (ACV<2% AND AUX W/U VALVE OPEN) OPEN COMMAND FROM SCM OR BFP-A TRIPPED
CLOSE COMMAND FROM SCM-A OR HPH-5A/5B EXT. VALVE OPEN OR CLOSE COMMMMAND FROM SCMSEAL STEAM INLET TEMP>270 DEG.C
HPH5A/5B/6A LVL VERY HIGH
NIL
SUCTION FLOW>30% AND AUX STM TEMP>280DEG.C
NIL
SUCTION FLOW>30% AND AUX STM TEMP>280DEG.C
NIL
SUCT FLOW>30% AND (ACV>2%OR WARMUP VALVE OPEN)
SUCT FLOW>30% AND (ACV>2%OR WARMUP VALVE OPEN)
CLOSE COMMAND FROM SCM AND SUCT. FLOW>30%
!
NIL
NIL
NIL
NTPC/TSTPP AREA – TG UNIT - 3/4/5/6
Sl No
Valve Tag
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains Description of Valve
31.
CRH 147
Steam to BFPT – B Line Drain
32.
CRH 109
CRH to DEA Pegging Line Drain
33.
34.
35.
36.
CRH 116
CRH 123
EX 101
EX 102
CRH to BFPT – A Line Drain
CRH to BFPT – B Line Drain
TS-II/OPN/OI /TG/ / 041 REV 0.00
Date : 25/ 02/2009
Auto open
Auto close
Protection open
OPEN COMMAND FROM SCM OR BFP-B TRIPPED
CLOSE COMMAND FROM SCM AND SUCT. FLOW>30%
NIL
NIL OPEN COMMAND FROM SCM OR BFPT-A TIPPED OR BFP-A WORKING &CRH TEM<250 DEG.C OR CRH BLOK VALVE CLOSE OPEN COMMAND FROM SCM OR BFPT-B TIPPED OR BFP-B WORKING &CRH TEM<250 DEG.C OR CRH BLOK VALVE CLOSE
NIL
NIL
CRH TEMP>290 DEG.C AND AUX STM BLOCK VALVE OPEN
NIL
CRH TEMP>290 DEG.C AND AUX STM BLOCK VALVE OPEN
NIL
Extraction to HPH – 6 A Line Drain
OPEN COMMAND FROM SCM OR HPH-6A EXT. VALVE CLOSED
CLOSE COMMAND FROM SCM AND HPH-6A EXT VALVE OPEN
Extraction to HPH – 6 B Line Drain
OPEN COMMAND FROM SCM OR HPH-6B EXT. VALVE CLOSED
CLOSE COMMAND FROM SCM AND HPH-6B EXT VALVE OPEN
NIL
NIL
LP DRAIN FLASH TANK ( 07 nos) CRH to DEA Pegging DS of CV Line Drain
HPH 5A/5B/6A LVL VERY HIGH OR TURBINE TRIPPED HPH 5A/5B/6B LVL VERY HIGH OR TURBINE TRIPPED
•
37.
CRH 153
!
NIL
%
NTPC/TSTPP AREA – TG UNIT - 3/4/5/6
Sl No
OPERATION DEPARTMENT Operating Instruction For Management of Turbine Drains
TS-II/OPN/OI /TG/ / 041 REV 0.00
Date : 25/ 02/2009 Protection open
Auto open
Auto close
OPEN COMMAND FROM BFP-A SCM OR OPEN COMMAND FROM BFP-B SCM OR BFP-A/B NOT WORKING
