`
Revision
Status
Description
C
PREL/FINAL
Drawn by
Name / Date
SS
Checked by
Name / Date
2020/11/10
Creation of document :
RISHI
Agreed by
Name / Date
2020/11/16
2020/11/10
RISHI
2020/11/18
Page 1 of 9
This document is the INTELLECTUAL PROPERTY of
Andritz Hydro GmbH
DESIGN MEMORANDUM & CONTROL PHILOSOPHY
FOR DRAINAGE SYSTEM
Document
Number:
PN EM 3 H I N 3 0 0 M E C 0 4 3 DD4 3 0 1 C
Internal Document number:
Transmitter :
Type of Document: DD
Refer to protection notice ISO 16016
PINNAPURAM PUMPED STORAGE PROJECT
PINNAPURAM PSP (4 x 240 MW + 2 x 120 MW)
GREENKO AP01 IREP PRIVATE LIMITED
CONTRACTOR:
#
CLIENT :
MODIFICATIONS TABLE
Drawn By
Checked By
Agreed By
DATE
B
RISHI
RISHI
K. JAIN
2021/03/16
C
RISHI
RISHI
K. JAIN
2021/04/12
MODIFICATIONS
As Per Customer Comment
Dated 25.11.2020.
As Per Customer Comment
Dated 30.03.2021.
STATUS
For Approval
For Approval
Refer to protection notice ISO 16016
This document is the INTELLECTUAL PROPERTY of
Andritz Hydro GmbH
REV
PN-EM3-HIN-300-MEC-043-DD-4301-C
Page 2 of 9
DESIGN MEMORANDUM & CONTROL PHILOSOPHY
DRAINAGE SYSTEM
1.
DRAINAGE SYSTEM .......................................................................................................... 4
1.1
1.2
1.3
1.4
1.5
1.6
Introduction ......................................................................................................................................... 4
Description........................................................................................................................................... 4
Drainage pit -1 for unit 8, 7, 6 & 5:- .................................................................................................... 4
Drainage pit -2 for unit 4, 3, 2 & 1:- .................................................................................................... 6
Material of construction for the equipment’s:.................................................................................. 8
Control System .................................................................................................................................... 9
Refer to protection notice ISO 16016
This document is the INTELLECTUAL PROPERTY of
Andritz Hydro GmbH
TABLE OF CONTENT
Client
PINNAPURAM PSP
HDE
Plant
Project Nº
Prep.
2020/11/10
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DESIGN MEMORANDUM & CONTROL PHILOSOPHY
DRAINAGE SYSTEM
1.
DRAINAGE SYSTEM
1.1
Introduction
In the power house drainage system is designed to collect the drainage water from all water discharges,
outlets, returns, leakages and seepages. The waste water from water from gallery drain, cooling water system equipment drain and water from runner & Deration Gallery from all floors of power house is collecting
This document is the INTELLECTUAL PROPERTY of
Andritz Hydro GmbH
in the drainage pit. The water from the respective drainage sump further discharged to the tailrace at EL.
346.60 m (Nalah).
This document is to be read in conjunction with ANDRITZ HYDRO drawing no.: PN-EM3-HIN-300-MEC043-DI-4300 _Rev-C, drawing no.: PN-EM3-HIN-300-MEC-043-DC-4302 _Rev-B.
1.2
Description
In the power house having two drainage pits. One drainage pit -1 is common for UNIT 8, 7, 6 & 5 and
another drainage pit -2 is common for UNIT 4, 3, 2 & 1 and is designed to collect the drainage water from
the respective units in the respective pits.

Water from gallery drain (Floor Drain).

Cooling water system equipment.

Water from runner & Deration Gallery

Other Leakages.
The automatically operated drainage system is required for drainage of all water discharge, drainage leakages from the equipment’s and any seepage from rock surrounding the powerhouse etc. into the drainage
pits shall be further pumped to the tail race at EL. 346.60 m.
Total four no’s of submersible pump motor set (1LSL10 AP001, 1LSL10 AP002 and 1LSL10 AP003 and
pump motor set (2LSL10 AP001, 2LSL10 AP002 and 2LSL10 AP003 and 2LSL10 AP004) for unit 4, 3, 2 &
1 for drainage pit- 2 shall be considered respectively; where two no’s of pump works as a main and two
no’s of pump as a stand by in the respective drainage pit shall be provided for pumping out the water from
the drainage pit to the tailrace at EL. 346.60 m.
1.3
Drainage pit -1 for unit 8, 7, 6 & 5:The pumping equipment shall comprise pump motor sets along with check valves (1LSL10 AA701, 1LSL10
AA702, 1LSL10 AA703 and 1LSL10 AA704), gate valves (1LSL10 AA051, 1LSL10 AP052 and 1LSL10
AP053 and 1LSL10 AP054) and instrumentation like pressure gauges (1LSL10 CP051, 1LSL10 CP052,
Client
Plant
Project Nº
PINNAPURAM PSP
HDE
Refer to protection notice ISO 16016
1LSL10 AP004) for drainage pit for unit 8, 7, 6 & 5 for drainage pit-1 and total four no’s of submersible
Prep.
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DESIGN MEMORANDUM & CONTROL PHILOSOPHY
DRAINAGE SYSTEM
1LSL10 CP053 and 1LSL10 CP054) and water level switches (1LSL10 CL001, 1LSL10 CL002, 1LSL10
CL003, 1LSL10 CL004, 1LSL10 CL005 and 1LSL10 CL006).
To control the auto operation of pumps, a set of level switches are provided in the drainage pit to give signals for auto operation through control panel. Pressure gauges are provided in the discharge line of each
pump, which shall provide local indication of water pressure.
The drainage pit and the adjacent dewatering pit shall be interconnected through a manual long spindle
valve (1LSL10 AA005), a check valve (1LSL10 AA711) shall be provided in the interconnected line which
This document is the INTELLECTUAL PROPERTY of
Andritz Hydro GmbH
will only allow water to flow from drainage pit -1 to dewatering pit -1.
A submersible pump motor set (1LSL10 AP 010) is provided to evacuate any pit’s floor drain / leakages at
EL. 328.30 m in case of any maintenance activity. A level switch (1LSL10 CL 007) is provided for the
operation of submersible pump.
The drainage pumping system for unit 8, 7, 6 & 5 shall comprise of following:

Four (04) nos. of submersible pumps (1LSL10 AP001, 1LSL10 AP002, 1LSL10 AP003 and 1LSL10
AP004).

Seamless stainless steel pipe & fitting for size up to 32 NB.

Seamless carbon steel pipes and fittings for pipe size 32NB and above. Wherever embedded pipe
thickness shall be more than 10 mm.

Check valves (1LSL10 AA701, 1LSL10 AA702, 1LSL10 AA703 and 1LSL10 AA704) and manually
operated gate valves (1LSL10 AA051, 1LSL10 AA052, 1LSL10 AA053 and 1LSL10 AA054) shall be
provided in the delivery line of each pump respectively.

One no of Water hammer arrestor (1LSL10 AA470, 1LSL10 AA471, 1LSL10 AA472 and 1LSL10
AA473) shall be provided at each of discharge line of pump to minimize the water hammer during shut
Refer to protection notice ISO 16016
down of pump respectively.

The pressure gauges (1LSL10 CP051, 1LSL10 CP052, 1LSL10 CP053 and 1LSL10 CP054) are
mounted to in discharge water line of each pump respectively for local indication of water pressure
with the help of instrument isolation valve 1LSL10 AA901, 1LSL10 AA902, 1LSL10 AA903 and
1LSL10 AA904).

The pressure switch (1LSL10 CP301, 1LSL10 CP302, 1LSL10 CP303 and 1LSL10 CP304) are
mounted to in discharge water line of each pump respectively with the help of instrument isolation
valve (1LSL10 AA906, 1LSL10 AA907, 1LSL10 AA908 and 1LSL10 AA909) to show their healthiness
& its signal is further processed in the control room for remote indication.
Client
PINNAPURAM PSP
HDE
Plant
Project Nº
Prep.
2020/11/10
RISHI
Filename
Chk.
Appr.
=
2020/11/16
RISHI
K. JAIN
Index / Date
C
2021/04/12
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2020/11/18
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DOC Nº
Filedate
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2020/11/18
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DESIGN MEMORANDUM & CONTROL PHILOSOPHY
DRAINAGE SYSTEM

Level transmitter (1LSL10 CL101) for monitoring of drainage pit -1 level at control system.

A pressure gauges (1LSL10 CP056) shall be mounted to in the common discharge header for local
indication of water pressure with the help of instrument isolation valve (1LSL10 AA910).

The Air Vent valve (1LSL10 AA201) shall be mounted with the help of instrument isolation valve
(1LSL10 AA911) at the topmost position of piping network for release of any air trapped inside the
This document is the INTELLECTUAL PROPERTY of
Andritz Hydro GmbH
system.

Check valve (1LSL10 AA706) shall be provided in the common water header to avoid any back flow.

Water level switches (1LSL10 CL001, 1LSL10 CL002, 1LSL10 CL003, 1LSL10 CL004, 1LSL10
CL005 and 1LSL10 CL006) are equipped in the drainage sump. The pumps shall be automatically
controlled by level switches in the drainage sump as followings:
- At EL. 272.10m: Alarm High water level reached;
- At EL. 272.00m: Pump -4 shall operate (Stand by);
- At EL. 271.50m: Pump -3 shall operate (Stand by);
- At EL. 271.00m: Pump -2 shall operate;
- At EL. 270.50m: Pump -1 shall operate;
- At EL. 270.00m: Pump dry run protection
1.4
Drainage pit -2 for unit 4, 3, 2 & 1:The pumping equipment shall comprise pump motor sets along with check valves (2LSL10 AA701, 2LSL10
AA702, 2LSL10 AA703 and 2LSL10 AA704), gate valves (2LSL10 AA051, 2LSL10 AP052 and 2LSL10
AP053 and 2LSL10 AP054) and instrumentation like pressure gauges (2LSL10 CP051, 2LSL10 CP052,
2LSL10 CP053 and 2LSL10 CP054) and water level switches (2LSL10 CL001, 2LSL10 CL002, 2LSL10
Refer to protection notice ISO 16016
CL003, 2LSL10 CL004, 2LSL10 CL005 and 2LSL10 CL006).
To control the auto operation of pumps, a set of level switches are provided in the drainage pit to give signals for auto operation through control panel. Pressure gauges are provided in the discharge line of each
pump, which shall provide local indication of water pressure.
The drainage pit and the adjacent dewatering pit shall be interconnected through a manual long spindle
valve (2LSL10 AA005), a check valve (2LSL10 AA711) shall be provided in the interconnected line which
will only allow water to flow from drainage pit -2 to dewatering pit -2.
Client
PINNAPURAM PSP
HDE
Plant
Project Nº
Prep.
2020/11/10
RISHI
Filename
Chk.
Appr.
=
2020/11/16
RISHI
K. JAIN
Index / Date
C
2021/04/12
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2020/11/18
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DOC Nº
Filedate
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2020/11/18
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DESIGN MEMORANDUM & CONTROL PHILOSOPHY
DRAINAGE SYSTEM
A submersible pump motor set (2LSL10 AP 010) is provided to evacuate any pit’s floor drain / leakages at
EL. 328.30 m in case of any maintenance activity. A level switch (2LSL10 CL 007) is provided for the
operation of submersible pump.
This document is the INTELLECTUAL PROPERTY of
Andritz Hydro GmbH
The drainage pumping system for unit 4, 3, 2 & 1 shall comprise of following:

Four (04) nos. of submersible pumps (2LSL10 AP001, 2LSL10 AP002, 2LSL10 AP003 and 2LSL10
AP004).

Seamless stainless steel pipe & fitting for size up to 32 NB.

Seamless carbon steel pipes and fittings for pipe size 32NB and above. Wherever embedded pipe
thickness shall be more than 10 mm.

Check valves (2LSL10 AA701, 2LSL10 AA702, 2LSL10 AA703 and 2LSL10 AA704) and manually
operated gate valves (2LSL10 AA051, 2LSL10 AA052, 2LSL10 AA053 and 2LSL10 AA054) shall be
provided in the delivery line of each pump respectively.

One no of Water hammer arrestor (2LSL10 AA470, 2LSL10 AA471, 2LSL10 AA472 and 2LSL10
AA473) shall be provided at each of discharge line of pump to minimize the water hammer during shut
down of pump respectively.

The pressure gauges (2LSL10 CP051, 2LSL10 CP052, 2LSL10 CP053 and 2LSL10 CP054) are
mounted to in discharge water line of each pump respectively for local indication of water pressure
with the help of instrument isolation valve (2LSL10 AA901, 2LSL10 AA902, 2LSL10 AA903 and
2LSL10 AA904).

The pressure switch (2LSL10 CP301, 2LSL10 CP302, 2LSL10 CP303 and 2LSL10 CP304) are
mounted to in discharge water line of each pump respectively with the help of instrument isolation
valve (2LSL10 AA906, 2LSL10 AA907, 2LSL10 AA908 and 2LSL10 AA909) to show their healthiness
Refer to protection notice ISO 16016
& its signal is further processed in the control room for remote indication.

Level transmitter (2LSL10 CL101) for monitoring of drainage pit -2 level at control system.

The pressure gauges (2LSL10 CP056) shall be mounted to in the common discharge header for local
indication of water pressure with the help of instrument isolation valve (2LSL10 AA910).

The Air Vent valve (2LSL10 AA201) shall be mounted with the help of instrument isolation valve
(2LSL10 AA911) at the topmost position of piping network for release of any air trapped inside the
system.

Check valve (2LSL10 AA706) shall be provided in the common water header to avoid any back flow.
Client
PINNAPURAM PSP
HDE
Plant
Project Nº
Prep.
2020/11/10
RISHI
Filename
Chk.
Appr.
=
2020/11/16
RISHI
K. JAIN
Index / Date
C
2021/04/12
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DOC Nº
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2020/11/18
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DESIGN MEMORANDUM & CONTROL PHILOSOPHY
DRAINAGE SYSTEM

Water level switches (2LSL10 CL001, 2LSL10 CL002, 2LSL10 CL003, 2LSL10 CL004, 2LSL10
CL005 and 2LSL10 CL006) are equipped in the drainage sump. The pumps shall be automatically
controlled by level switches in the drainage sump as followings:
- At EL. 272.10m: Alarm High water level reached;
- At EL. 272.00m: Pump -4 shall operate (Stand by);
This document is the INTELLECTUAL PROPERTY of
Andritz Hydro GmbH
- At EL. 271.50m: Pump -3 shall operate (Stand by);
- At EL. 271.00m: Pump -2 shall operate;
- At EL. 270.50m: Pump -1 shall operate;
- At EL. 270.00m: Pump dry run protection
1.5
Material of construction for the equipment’s:
C
Gate valve:
Design Standard – BS 1414
Body & Bonnet– Cast steel ASTM A 216 WCB,
Wedge – Cast steel ASTM A 216 WCB +13%Cr. SS facing
Seat ring A 216 WCB / A515 Gr.70 with 13%Cr. SS facing
Stem & Gland bush – AISI 410
Gland packing – Graphited asbestos
Check valve:
Design Standard – BS 1868
Body & plug – Cast Steel
Ball – Cast Steel
Seal – NBR
Internal hardware – Stainless steel
Refer to protection notice ISO 16016
Submersible pump:
Pump casing, motor casing & other part – CI FG 260; IS 210 / eq.
Mechanical seal motor side – carbon v/s cast Cr Mo steel
Mechanical seal pump side – SiC v/s SiC
Impeller – CF 8M
Rotor shaft – AISI 410
Suction strainer – Stainless Steel
Lifting chain – Alloy steel
Guide pipe - Galvanized iron (GI)
Fasteners in liquid – SS 304
Client
PINNAPURAM PSP
HDE
Plant
Project Nº
Prep.
2020/11/10
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DESIGN MEMORANDUM & CONTROL PHILOSOPHY
DRAINAGE SYSTEM
Pipes:
The material of construction of pipe shall be Seamless carbon steel as per ASTM A 106 Gr B.
This document is the INTELLECTUAL PROPERTY of
Andritz Hydro GmbH
Sr. No.
1.6
Pipes & Valves
Size (NB)
Schedule
Thickness
1.
Pipe line from pump
discharge to drainage
water header
250
Std
9.27
2.
Drainage water header to discharge outlet
at EL.346.60 M
500
Sch 30
12.7
3.
Mini Pit pump
discharge line
(All surface pipes)
50
Sch 40
3.91
4.
All type of valves
All Sizes
Class 150
-
Control System
A local control & indication panel for drainage system is provided. Following controls & indications shall be
provided:
a. The switchgear and controls shall be suitable for automatic and manual operation of pumps.
b. Local manual control of pump motor sets shall imply manual control from the panel.
c.
The switchgear and controls shall comprise direct on line motor starters for motor capacity less than
30 KW whereas motor capacity more than 30 KW shall be soft starter, relays, protection, single phase
prevention device, auto/manual selector switch, push buttons, indicating lamps etc.
Refer to protection notice ISO 16016
d. Interlock for starting of the pump with the level switches installed in the respective drainage pit.
e. The selector switches shall be provided for mode change over auto – manual operation and pump
main stand by role etc.
f.
Start / stop push buttons.
g. Emergency stop push button switch.
h. The motors shall be suitable for 415 V ± 10%, 3 phase, 50 Hz AC supply.
i.
Remote control of the drainage system shall be provided from the central control room.
Client
PINNAPURAM PSP
HDE
Plant
Project Nº
Prep.
2020/11/10
RISHI
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