SECTION-VI - NBPPL...S.No Volume Section Clause Page no Bid Specification Pre bid Query NBPPL REPLY 1 IIA SECTION-VI PART-A SUB-SECTION-RIA-07 COAL HANDLING PLANT 201.02 iv 2 of 10

S.No Volume Section Clause Page no Bid Specification Pre bid Query NBPPL REPLY

1 IIA

SECTION-VIPART-A

SUB-SECTION-RIA-07COAL HANDLING

PLANT

201.02iv

2 of 10

Two numbers Belt Scale (BS-41 & BS-42) shall also beprovided, one each on Conveyor 23A and 23B for measurement of coal flow rate.

Belt scale will be provided on Conveyor 30A/B since there is no conveyor 23A/B.

Belt scale to be provided on 30A/B

2 IIA

SECTION-VIPART-A

SUB-SECTION-RIA-07COAL HANDLING

PLANT

2.02.13 6 of 10

All modification work on existing conveyor 4A/B and 18/18B for feeding to stage-l & stage-all conveyor.

Kindly specify the location of 4A/4B conveyor.

Please refer Plot Plan which is only indicative. The exact layout of CHP is to be designed / Engineered by the vendor

3 IIA

SECTION-VIPART-B

SUB-SECTION-A-35CHP

2.01.00 1 of 26

Design capacity(b) Other conveyors of proposed CHP : 170TPH

Kindly specify the design capacity of the conveyors.

Design capacity of the conveyor will be 1760 TPH other than boom conveyor of staker / reclaimer

4 IIA

SECTION-VIPART-B

SUB-SECTION-A-48CHP

1.01.08 2 of 5

Bunker sealing arrangement Kindly confirm whether Bunker sealing arrangement is in Bidder scope.

Yes it is in Bidder's scope

5 IIA

SECTION-VIPART-B

SUB-SECTION-A-I3COMPRESSED AIR

SYSTEM

2.00.00 15 of 17

EOT Crane Please confirm whether EOT Crane to be provided for Wagon tippler complex.

Bidder to design as per the Specification requirement

6 IIA Section-VI, Part-A, Sub-Section-IIProject

information2 of 12

Coal transportation: The envisaged mode of coal transportation from the coal mines to the power plant isby Indian Railways rakes. The rakes shall be unloaded at the track hopper.

Track hopper is not considered in the scope of work. Unloading of coal shall be by 2 nos. Wagon tipplers only as indicated in the scope of work and flow diagram.

There is no Track Hopper

7 Vol-I Technical enquiry specification 3.1

Supply of two (2) numbers travelling tripper including mandatory spares of travelling tripper of DMW, USA make shall be supplied by NBPPL free of cost to the bidder.

8 IIASection-VI, Part-A, Sub-Section-IIIA-

07Detailed Scope 6 of 10

Two (2) Nos. motorized Travelling Trippers, each of 1600 TPH capacity one (1) no. on each conveyor 38N38B. Trippers shall be complete with all mechanical, electrical equipment, rails, chute work, rail supporting structure (along with structural stools, as required), cabfes with cable festooning arrangement, thruster brakes, rail clamps, electric hoist, actuator flap gates etc. Bunker sealing and Gridlgrating over the entire length of bunker slot on tripper floor.

9 IIA Section-VI, Part-A, Sub-Section-VFunctional

Guarantees, CL.1.03.10

Flow paths description kindly correct the flow path description inline with the Flow diagram. Conveyor numbers and TP numbers are not matching.

10 IIA Section-VI, Part-A, Sub-Section-VFunctional

Guarantees, CL.2.02.01 ©

Flow Path Capacity Tests For flow path guarantee we shall be able to give guarantee for our supplied equipment, but not for Travelling Trippers supplied by client. Please confirm

Noted.

1 I 5.0 (4) 9 of 53

All modifications work on existing conveyor 5A/B and 18A/B for feeding coal in to Stage I and Stage II conveyors from Stage IV conveyor shall be in bidders scope of design, supply, E&C.

Request customer to provide the details for the modifications works to be done in the existing conveyors 5A/B, 18A/B especially w.r.t interface issues.

Details will be provided during detail Engineering, however bidder's are requested to visit the site before submiting the bid.

1 x 500 MW NBPPL FGUTPP Stage IV

Mechanical

These two clauses are contradictory. We are not considering travelling trippers from our scope of supply. Please confirm

Electrical

Two (2) Nos Travelling Trippers along with Motor only but excluding all other related Electrcial and Instrumentation equipments, will be supplied by NBPPL free of cost. However, complete Erection, Commissioning and Integeration with the Bidder's system are in the scope of the Bidder.

2 I14.0

S.No ::1,20.0 (4)

21 of 53,33 of 53

1. 11kV power supply from HT board of NBPPL to transformer I/C panel along with cable tray and accessories shall be in the scope of NBPPL.

HV Bushing of 11/3.45kV proposed transformer is the terminal point. Please confirm our understanding.

The incoming 11 kV cable shall be terminated at HV side Cable box.( HV bushing is not applicable here)

3 I14.0

S.No ::121 of 53

2. Control cable between 11kV switchgear (NBPPL) to transformer I/C panel shall be in NBPPL scope.

We understand that intertripping cable between proposed 3.3kV switchgear and 11kV switchboard (customer''s scope) is in the scope of customer. Please confirm our understanding.

Control cabling with upstream 11 kV system is in NBPPL's scope.

4 I14.0

S.No ::1222 of 53

In addition to other lighting system items, vendor shall consider lighting distribution board (LDB) with 50kVA transformer, lighting panels (LP) with 8 outgoings & timer control as per requirement.

Rating of the lighting transformers for the proposed package will be sized as per actual requirement ie not restricted to 50kVA. Please confirm our understanding.

Noted.

5 I14.0

S.No ::1222 of 53

In addition to other lighting system items, vendor shall consider lighting distribution board (LDB) with 50kVA transformer, lighting panels (LP) with 8 outgoings & timer control as per requirement.

We envisage only one spare in the LP. All other feeders will be used for lighting / receptacle purpose. Please confirm our understanding.


6 I14.0

S.No ::1322 of 53

Any other equipment/material/ service including interconnection between StageII & Stage-IV required for completeness of CHP but not specified above.

Request customer to mention the other systems / equipments required for the proposed package.


7 I14.0

Notes :: 123 of 53

Sub-Vendor List provided for Electrical Equipments/items is indicative only and it requires prior approval from NBPPL/NTPC before finalising the sub-vendor.

Finalising the vendor ( selected from with in the approved list- Volume II A , Annexure-1 page 1491 of 1534 ) will be through an internal process ,after thorough review of the techno-commercial aspects.Obtaining NBPPL concurrence before finalisation is not envisaged.

The sub-vendor finalisation/approval is NTPC/NBPPL's prerogative, which is to be submitted by successful bidder(contractor).

8 I14.0

23 of 53

Electrical Actuators with integral starters In line with the prevailing practices in all NTPC jobs for CHP package, we may select electrical actuators with non- integral starters .Please confirm our understanding.

Bidder to follow Technical Specifications

9 I 19 32 of 53

Contractor shall have to deploy the DG sets for carrying out the tender works. However electricity (for construction purpose only) may be provided free of cost at customers single point source subject to availability. Bidders have to make his own distribution arrangement to draw electricity.

We understand that construction power will be provided by client at 415V level, within the battery limits.Also, we request customer to provide the construction power at required work centres.

Construction power at 415 V shall be provided at single point, as per Clause no. 19.0 C) of Volume I

10 I20.0,25.0

33 of 53,37 of 53

Terminal Points ::Station lighting all along the roads of CHP area shall be in bidder scope.

EXCLUSIONS: 1. Station lighting for roads along CHP plant, travelling tripper area (Bunker floor).

In view of the contradiction between the mentioned clauses, we understand that station lighting (i.e. Road lighting along proposed CHP area, boundary lighting) are excluded from the scope of work. Please confirm our understanding.

Bidder to follow the Technical Specification

11General

- Stream of Operation for sizing the electricals

We request customer to mention whether the electricals for the proposed CHP package to be sized for single stream operation or for double stream operation.

The design shall cater to double stream operation.

12 I VI / III-B14.0,

1.00.0021 of 53,1 to 14 of

14

Scope of work In view of the variation between the mentioned clauses, we understand that scope of work for the proposed CHP package is in line with Volume-I, Clause no :: 14.0, 21 of 53. Please confirm our understanding.


13 VI /B0 1.12.00 2 of 9

Fire hazardous area We understand that fire hazardous area is not applicable for the proposed CHP package. Please confirm our understanding.


14 VI /B01.07.00,3.12.00

2 of 9,5 of 9

Control supply for the breaker operated feeders

In view of the variation between the mentioned clauses, we request client to clarify whether the proposed control supply is of 220V DC or 110V DC.

The proposed control supply is 220 V DC

15 VI /B0 3.12.00 4 of 9

Design margin We have envisaged the design margin of the proposed DC system for the CHP package as 10%. Please confirm our understanding.

The batteries will be suitably sized considering emergency load cycle requirement of 30 minutes. An ageing factor of 1.25 for Ni-Cd & 1.0 for Lead-Acid and temperature correction factor for 15.0 deg. C for sizing the battery have been considered

16 VI /B-04 (B) S.No. (5) 8 of 9

One minute power frequency withstand voltage

One minute power frequency withstand voltage of the proposed 3.3kV bus duct will be of 10kV instead of 21kV as per IS. Please confirm.


17 VI/ B-06 2.00.00 1 of 9

Type of service transformers We understand that type of service transformers of either oil filled type or dry type option is with the bidder. Please confirm our understanding.

Confirmed; Bidder to follow Scope Matrix - electricals.

18General

- Criteria for sizing the transformers

We have considered the following factors for sizing the power & service transformers::1. Load factor for all continuous loads :: 0.9 unless specifically mentioned in the specification for the respective equipment. 2. Load factor of 0.2 for all intermittent loads such as valves, dampers, cranes, hoists, sump pumps etc.3. Design margin :: 10 % over the operating load.4. Voltage correction factor :: Nil

Please confirm.


19General

- Purchaser's load

We have not considered any purchaser's load in the proposed electricals such as either in switchgear or for sizing the transformer. Please confirm our understanding.

Confirmed; Bidder to quote as per own calculations

20 VI / B-07(A) 4.05.12 13 of 27

Fast change over scheme We understand that fast change over scheme is not applicable for the proposed 3.3kV switchgear. Please confirm our understanding.

Confirmed.

21

Plot PlanDrawing No. PE-DG-401-100-M001, Rev.4

-Location of MCC for the proposed CHP Package

We request customer to indicate the location of the following in the plot plan ::1.All the switchgear room for the proposed package.2. Control Room location.

Bidder to make the Final Layout plan of CHP during detailing engineering

22Coal Handling Plant - General Layout Plan : Drg. No : 1450-155-POM-001 Rev. A

We request client to furnish a editable / legible copy of CHP general layout plan

For autocad drawing bidder may contact NBPPL office address as mention in NIT.

23

Single Line Diagram: Drg No: 1450-999-POE-J-002

The mentioned single line diagram has not been found attached with the tender specification. We request client to kindly furnish the same.

Attached.SLD is indicative only and for better understanding of overall plant.

24 VI / A / III B 1.05.04 6 of 14

Lead acid Plante type I Nickel Cadmium batteries, Float cum boost chargers and DCDB for main plant, 400 kV and 200 kV switchyards and all other areas in the scope of the contractor, as per system requirement.

We understand that the clauses referred here are not applicable for the present package. Please confirm.

confirmed

25 VI / A / III B 1.05.04 6 of 14

Following DC systems (Battery. Charger and DCDB) shall be supplied to cater to various DC loads in the plant.

We understand that out of the listed DC systems, only CHP DC system is included in present scope of work. Please confirm.

Confirmed.

26

Key Single DiagramDrawing No :: 1150-999-POE-J-004,Rev. b- Major Electrical scope for proposed CHP Package

We understand that the following are the major electrical equipments included in bidder's scope :1. 11/3.45KV transformers - 2nos adequately rated for coal handling plant loads.11KV cable from owner's board to proposed 11/3.45 KV transformer is not included in bidder' scope. 2. 3.3KV cables for CHP loads3. 3.3 /0.433 KV transformer -2nos : adequately rated for coal handling plant load4. 415V switchgear for CHP loadsPlease confirm our understanding

Confirmed

27Key Single DiagramDrawing No :: 1150-999-POE-J-004,Rev. b- Voltage Ratio of service transformer

We understand that the voltage ratio of the proposed service transformer is 3.3/0.433kV , in line with Volume-I, Cl :: 14, 21 of 53. Please confirm our understanding.

Bidder to follow Scope Matrix - electricals.SLD is indicative only and for better understanding of overall plant.

28General- Rating and configuration of the service transformer

We understand that maximum rating of the service transformer will be of 2.5 MVA with 2X100% configuration. In case of exceeding the mentioned rating, we will envisage service transformers with 3x50% configuration. Please confirm our understanding.

Bidder to quote as per own calculations

29 I 14 21 of 53

Cable trays, accessories &cable tray supporting system

We understand that the Cable trays, accessories &cable tray supporting system only for bidder supplied cables are included in bidder's scope. Please confirm.

Confirmed.

30 VI / A / III B 1.11 8 of 14

DG Set We understand that DG sets are not included in present scope of work. Please confirm.

Confirmed. However, Contractor shall have to deploy the DG sets for carrying out the construction works as per Clause no. 19.0 C) Volume I.

31General ::

Cable routing

We understand that no separate cable gallery is envisaged for the proposed CHP. The cables can be routed along the conveyor inside the conveyor gallery. Please confirm.

Confirmed.

32 Generalvendor list We will propose additional vendors during

detailed engineering for client concurrence. Noted.

33 GeneralVendor list For items not listed in the approved vendor

list we will source such items from our standard vendor list.

The sub-vendor finalisation/approval is NTPC/NBPPL's prerogative, which is to be submitted by successful bidder(contractor).

34 GeneralKey SLD no 1150-999-POE-J-004 rev b We understand that this SLD is not

applicable for proposed scope of tender.Attached.SLD is indicative only and for better understanding of overall plant.

1 Vol I - 15.0 (Sl no. 8) 26 of 53

Any other equipment/material/service including interconnection between Stage-II & Stage-IV required for completeness of CHP but not specified above.

Please clarify the requirements for the interface between Stage-II & Stage-IV.

This shall be finalised during detailed engineering.

Control & Instrumentation

2 Vol I - 25.0 37 of 53

Exclusions We presume that bidder scope is limited to the systems specified in the scope matrix (Vol I, clause 15.0, sheet 25 of 53). Any other systems / equipments, specified in tender specifications elsewhere are excluded from bidder scope of supply. Kindly confirm.

Confirmed.However, Any other equipment/material/service including interconnection between Stage-II & Stage-IV required for completeness of CHP but not specified in the scope matrix shall be in Bidder's scope.( as per Sl. No. 8 of scope matrix C&I )

3 Vol II VI, Part-B, subsection A-47 1.03.01 2 of 6

Vibration Monitoring for coal crushers

No. of location per equip 2 - One at DE and One at NDE

We have assumed that total number of vibration sensors per crusher are 4.nos (2 per DE and 2 per NDE), hence total vibration sensors for 4 crushers are 16 numbers. We have not envisaged any vibration sensors for crusher motors. Kindly confirm.

Bidder to follow Technical Specifications Volume IIA.

4 Vol II VI, Part-B, subsection A-47 1.04.02 3 of 6

Vibration Monitoring for crushers

Point-e) Monitors (to be located in CHP control room)

Buffered signal output and software for vibration analysis through CHP control desk HMI.

We have not envisaged any analysis software for the crushers VMS, as the complete CHP control system is excluded from bidders scope. Bidders scope ends at the termination of buffered signals at the CHP control room panels.Kindly confirm.

Confirmed. Bidder to provided Buffered signals at 4-20ma level.

1 GeneralContour drawing Detailed contour drawing is not available for

plant area,please provide the same.If required same shall be provided during detailed engineering.

2 General

Plot plan Please provide the softcopy of contour drawing & plot plan indicating scope demarcation for better scope clarity in AutoCAD format .


3 General - -

Roads We understand that Roads & drains will not be in the bidder's scope except drains at stock pile area and garland drain all around buildings. Kindly confirm.Also, please furnish the Road and drain layout for working out the connecting drain if any.

1) Confirmed.2) It shall be provided during detailed Engineering

4 I NBPPL-004-101-27-PIG-A-R0 3 4 of 53

Civil & Structural works (Except piling & foundation upto plinth level for TP-32 & TP-

33 excluding foundation bolts shall be in the scope of NBPPL)

Whether the foundation for TP-32, TP-33 will be in bidder's scope excluding foundation bolts and structural works, kindly clarify. If so ,whether the grouting will be in bidder's scope.

Foundation of TP -32 and TP -33 upto plinth level excluding providing and fixing and grouting of foundation bolts are in the scope of NBPPL. However, supply of foundation bolts are in the scope of bidder.

5 IIA Section-VI, Part-B, Sub-Section-D-01 ANNEXURE-II 227 of 245

List of Codes and Standards:IS 800:1984 - Code of practice for use of

structural steel

We understand that the Structural steel design shall be carried out in Working stress method as per IS 800-1984 and IS 806 for Hollow sections. Please confirm.

Bidder to follow the Technical Specification.

6 IIA Section-VI, Part-B, Sub-Section-D-01 ANNEXURE-I 6 of 8

Table-2: Net Allowable bearing Pressure Kindly furnish the Net Allowable bearing Pressure for TP's , Crusher house, Conveyor Trestles & Stacker Reclaimer w.r.t the depth of foundation.


7 I NBPPL-004-101-27-PIG-A-R0 25 37 of 53Site levelling & grading Site levelling & grading required at CHP area

is excluded from bidder's scope. Kindly confirm.

Bidder to follow the Technical Specification.It is in the scope of NBPPL.

Civil & Structural

8 IIA Section-VI, Part-B,Sub-Section-D-01 13.12.02 128 of 245

Drainage system. The peripheral drains of junction houses /

crusher house ….

We understand that the peripheral drains of junction houses / crusher house / MCC buildings and Down take pipe from conveyor galleries shall be connected to the RCC pit and the overflow water from pit shall be connected to the drain along the Owner's road / Coal Settling pond whichever is nearest. Kindly confirm whether our understanding is correct.And please furnish the plant cum approach road and drain layout.


9 General - -

Crack width Under ground structures will be designed as per IS:456-2000 with a limiting crack width of 0.2mm.please confirm.


10 General - -Coal settling pond scope Whether coal settling pond is in bidder's

scope, Kindly clarifyBidder to follow the Technical Specification.

11 IIA Section-VI, Part-B,Sub-Section-D-01 13.12.02 128 of 245

Drainage system. Peripheral drains for Junction house /

Crusher house/MCC Buildings/pump house

Peripheral drains for Junction house / Crusher house/MCC Buildings/pump house shall be of open surface brick drain (or) RCC construction, Kindly clarify.


12 IIA Section-VI, Part-B,Sub-Section-D-01 13.12.02 128 of 245Rainfall intensity Rainfall intensity of 75mm/hr will be taken

into consideration with 30minutes detention time. Please confirm.


13 General - -Demolition Demolition/breaking/clearing of any

existing structures excluded from bidders scope. Please confirm


14 IIA Section-VI, Part-B,Sub-Section-D-012.01.00 (l) ,

3.01.01 , 6.01.00

4 of 245 , 5 of 245 , 77 of 245

Mill & Bunker building scope. There is a discrepancy between the clauses 2.01.00 (l) , 3.01.01 , 6.01.00 & Page No. 4 of 245, 5 of 245 , 77 of 245, in the VOL-IIA of the technical specification, Please clarify whether the Mill & Bunker Building is in bidder's scope.

Mill & Bunker building shall be in NBPPL scope.

15 Section-VI, Part-B,Sub-Section-D-01 13.05.00 124of 245

Stacker reclaimer / coal stockyard As per this clause , there is no mention of Coal stock yard base preparation works. We presume that only compaction of surface is n bidder's scope. Please confirm.


16 I NBPPL-004-101-27-PIG-A-R0 5 9 of 53

Dismantling & relocation of existing CSSP Since the dismantling & relocation of existing coal slurry settling pond is in bidder's scope. Kindly furnish the in detail drawings for the same.

It shall be furnished during detailed engineering

17 I NBPPL-004-101-27-PIG-A-R0 20 33 of 53Terminal point Kindly clarify in detail regarding the terminal

points pertaining to civil, structural & Architectural works.


S.No Reference Query NBPPL REPLYDrawings

1 General Layout Plan -CHP Pkg

a)1450-155-POM-001. Rev.A

All coordination of the buildings are not clearly visible in the PDF drawings. Please provide the clear visible drawing or cad version drawing of the general layout.


b) Coordinate of the Pent House -PH41, PH42 & PH43 not mentioned -To be ConfirmedIt shall be provided during detail engineering

c) Stock Pile Coordinates not mentioned. Clarity on Stock Pile Scope to be Confirmed

(1) It shall be provided during detail engineering. (2) Bidder to design as per the Specification requirement

d) Pump house coordinates are not mentioned. Please provide.It shall be provided during detail engineering

e) Access Roads & Approach Roads Scope to be Confirmed

Confirmed. However, the drains under the scope of bidder shall be connected to Main drains which are in the scope of NBPPL.

2 Coal Flow Diagrama) 1450-155-POM-A-002.Rev.A

b) No ERH & Track Hoppers along with Conveyors to be Confirmed Bidder to design as per the Specification requirement

c) Conveyor Lengths Taken from the Plant Layout Drawing-To be Confirmed Bidder to design as per the Specification requirement

140-155-POM-A-004. Rev.B

a) Wagon Tipler Shed not Shown.We have not considered-To be ConfirmedBidder to design as per the Specification requirement

b) Hoisting Arrangment for the Wagon Tipler Complex to be considered or not- To be Confirmed.Bidder to design as per the Specification requirement

e) Conveyor Lengths Taken from the Plant Layout Drawing-To be ConfirmedBidder to design as per the Specification requirement

PREBID QUERIES

TECHNICAL SPECIFICATION FOR CHP

31.02.01 & 1.02.18

We have considered manual hoists based on the requirement as per clause - 1.02.18 for Takeup pulley & Bend Pulley .But in the clause 1.02.01 GTU/Bend Pulley shall be Motorised - To be Confirmed

GTU/Bend Pulley shall be Motorised.

19.02.00

Access roads to all buildings/facilities (in Contractor Scope) will be in the employer’s scope. However, these access roads would not be available during the construction phase. Contractor shall construct and maintain temporary access roads as required, by him for approach to the building/facilities in his scope for his construction/erection- Any Provision to be made in the price bid for Addl Cost for making temporary roads -Please Clarify

Temporary enabling works including approach / access roads to be constructed by Bidder without any extra cost implication to NBPPL.

1.01.04 & 1.03.00 Water supply connections for dust suppression, service water system, potable watershall be provided at two different locations by the employer, details of which aregiven in the tender drawing -Pls Confirm the distance or mark up the location in the plot plan

2.00.00 ( Civil)Construction power shall be provided by the employer on chargeable basis as per the provisions of erection conditions of contract. - In Erection Conditions it was mentioned as free power -Pls Confirm

Free construction power shall be provided at One Location.

4

26.01.00( Space)Land for staff and labor colony shall not be provided by the owner andcontractor has to make his own arrangement for the same at his own cost .Bidder requested to provide space for the same.- To be Confirmed.

Land will be provided for Labour colony. However, if any development is required to be done by the vendor at their own cost.

.

26.02.00( Electricity) The Contractor shall be providedwith free supply of electricity for the purposes of the Contract, only at maximumthree (3) locations in the Employer’s site, at 415V voltage level. The Contractorshall make his own further distribution arrangement and shall maintain a minimumdrawl power factor of 0.8, and all such devices for maintaining power factor of 0.8 orbetter shall be under the scope of contractor - Bifurcation of free power & Chargeable power basis.

It shall be provided during detail engineering

Free construction power only shall be provided at One Location.

VOLUME - IIA, NBPPL-004-101-27-PIG-A-002.R0

NBPPL-004-101-27-P1G-A-003 R0.(Volume-IIB)PART - D (85-139)ERECTION CONDITIONS OF CONTRACT

26.03.00 (Water)Contractor shall make all arrangements himself for the supply of construction water as well as potable water. Bidder requested to provide Construction water at free of cost and Potable water for Labour hutment & staff colony shall be arranged by us.-To be Confirmed

Specification shall prevail

31.00.00 The Employer will mark-out the boundary limits of access roads, parking spaces, storage and construction areas for the Contractor Please clarify

It shall be provided after site mobilisation

Sl No Tender Reference Clarification Reply By NBPPLMechanical

1Iterconnecting conveyor, Stgae-II to Stage-IV.

Kindly Clarify the requirement of interconnecting conveyor from Stage-II to Stage-IV. As there is no clarity of terminal points.

1. Inter Connection Conveyor Profile Drawing shows the conveyor between TP-14 to TP-28A.2.Plot Plan - PE-DG-401-100-M001, R-4 shows the conveyor betwwen TP-10 to TP-28.3.The system description is not having any write up for the same.4. MOM dated - 14.11.14 is not clear the interconnection TP should be TP-28 or TP-28A.5. Flow Scheme - 1450-155-POM-A-002, Doesn't show any interconnection.6. Profile Drawing - 1450-155-POM-A-005, Doesn't show any interconnection.Kindly clarify the Points.

1. There is no TP 28A. However, TP 28 will be shifted slightly and will take the position of 28A2. There will be Interconnection from TP14 (Existing) to TP283. Interconnection conveyer shall be designed as per Tech specification for other conveyers.4. As per MOM dtd 14.11.14, interconnection should be at TP285. Interconnection shall be in the scope of bidder. 6. Interconnection shall be in the scope of bidder.

2Vol-I, Page-5 of 53.Travelling Tripper.

As the bidder to ensure that the systems designed and supplied by the bidder are compatible with the travelling tripper cars.

Kindly provide the Tripper GA drawing indicating the Conveyor cross-section along with Load data.

Please note that the GA drawings shall be provided during detailed engineering

3

VOLUME-IID, DocumentNo- NBPPL-004-101-27-P1G-A-005 R0,Amendments & Clarifications To The Technical Specifications

The Amendments & Clarifications are attached shows the Singaruli TPP 1 x 500MW.Kindly provide the Amendements & clarification related to this project.

Please refer Volume -1, Clause 4, Pt 7 of Technical Specification

4 Layout

There are two layout drawing.1. General Layout Plan - 150-155-POM-001, R-4.2. Plot Plan - PE-DG-401-100-M001, R-A.

Kindly confirm which drawing to follow as bothare showing different

Please refer NTPC Drawing No 1450-001R-TGPE-PVM-F-000, Rev -4 available in Volume -2 (Page No 1507 of 1534) of Technical Specification

5 Plot Plan, Profile drawingKindly provide us the AutoCAD Drawings for Plot Plan & Profile drawings. For Calculation & Estimation Purpose.


6Clause No- 2.01.00,System Parameter,A-35,Part-B, Page-1 of 26.

Design capacity of Other Conveyor Mention as 170 TPH. Kindly check and confirm for which conveyor it is 170 TPH.

Please read design Capacity as 1760 TPH instead of 170 TPH

7Crusher House, Mobile Belt feeder

Instead of Mobile feeders we can have simple flapgate arrangement to discharge to the preceding conveyors. As there will be problems related to-1. DE System.2. Dust generation at discharge chute due to improper sealing.3. Skirt Board sealing arrangement.


8 Wagon Tippler ComplexKindly clarify wether any requirement of Shed in Wagon Tippler complex and EOT Crane for maintenance.


Civil

1 Salient Details S. No. 1Kindly confirm if Piling works and all foundation works up to plinth level except foundation bolt fixing, alignment, concreting and grouting for TP-32 and TP-33 are in the scope of NBPPL

Foundation of TP -32 and TP -33 upto plinth level excluding providing and fixing and grouting of foundation bolts are in the scope of NBPPL. However, supply of foundation bolts are in the scope of bidder.

2 Vol.1 Cl. 3.1

Kindly confirm if Deck Sheeting is also in bidder's scope as a free issue material.Kindly confirm if side cladding and roof sheeting are also free issue materials as the same has been crossed out in Vol. IIKindly clarify if steel for inserts as well as lugs are also free issue materials

Supply and Fixing of Deck Sheeting , side cladding and roof sheeting are in the scope of bidder.Only Structural steel as mentioned in the specifcation shall be provided by NBPPL

3 Vol.1 Cl. 3.1, 3.3, 5.0.1We understand that supply of structural steel includes raw material only and fabrication works and erection of fabricated steel members are in the scope of bidder.

Confirmed

FEROJ GANDHI UNCHAHAR THERMAL POWER PROJECT (1 X 500MW)COAL HANDLING PLANT

4Vol. 1 Cl. 25.20, Vol. IIA, NBPPL-004-101-27-P1G-A-002, Cl.3.01.01

It is understood that all road drains & culverts are also excluded along with roads. Furthermore, it is understood that exclusions are inclusive of both design engineering as well as construction works

Confirmed. However, the drains under the scope of bidder shall be connected to Main drains which are in the scope of NBPPL.

5Vol.IIA, NBPPL-004-101-27-P1G-A-002, Cl.3.01.03

Kindly confirm if Mill & Bunker Building Design Engineering and Construction works are excluded from bidder scope

Mill & Bunker building shall be in NBPPL scope.

6Vol.IIA, NBPPL-004-101-27-P1G-A-002, Cl.13.07

Kindly confirm if Pump House is RCC or Steel Structure. Also confirm if rung ladder is sufficient for roof access. Kindly confirm what is the weight of galvanization for rungs required


7 General QueryKindly confirm if brickwork is of clay bricks or fly ash bricks. Which of the 2 are readily available?


8 General QueryIs there a bulldozer maintenance shed and are bulldozers also required to be provided?


9 General Query Coal Sampling Building envisaged?Bidder to follow the Technical Specification.

NBPPL

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Documents

SECTION-VI - NBPPL...S.No Volume Section Clause Page no Bid Specification Pre bid Query NBPPL REPLY 1 IIA SECTION-VI PART-A SUB-SECTION-RIA-07 COAL HANDLING PLANT 201.02 iv 2 of 10