NCTPSI SEMII Circle AHP Dn Watch and ward round the clock Routine Maintenance and Breakdown in Ash slurry Disposal Lines from Ash Handling Pump House to NCTPS stage-II Compound wall from date of taken over site to 31 03 2026

Amount

I. Watch & Ward for Ash Slurry Disposal Lines and Recovery water lines.: Watch & Ward round the clock (24x7) for noticing slurry /water leakage in the ash Slurry disposal lines No:1 to 5 and Recovery water line between Ash Handling Pump House to NCTPS-II Compound wall including cleaning the bushes / debris nearby the slurry lines T & P’s and consumables all including

II. One time removal of spreaded/accumulated spill over ash slurry: Complete excavation /removal of deposited ash under the pipe lines adjacent to the pipe line about 10 Mtr width throughout the length of above specified area and dumping near specified area as per direction of the Engineer -in -charge at stie. T&P’s Consumables all including.

III. Routine/Breakdown Maintenance in ASDL: Transportation of 12 mm length or less second hand pipes/New pipes from stores to site, dismantling and erection of 2 Mtrs to 12 Mtrs length or less Cast Basalt Lined /ceramic pipe having OD 406 mm ID 336mm or R.C.C. sleepers including crane charges etc., (Material will be supplied by TNPGCL).

Replacement of sleeve coupling in place of the damaged sleeve coupling set/sleeve in place of joints short pieces including all charges inclusive of transportation of materials from stores etc (MS 200mm width sleeve coupling complete set) (406 mm OD pipe) (Material will be supplied by TNPGCL).

Fixing Sleeve Joint/Flange in place of damaged sleeve coupling joint/pipes by welding with TNPGCL welding supply for joining the cast Basalt pipes. Pipes OD 406mm to arrest leaks and to prevent pipes damages (100/200mm width MS sleeve (100/200mm width, ID 410mm,, OD 430mm. thick 10mm) (Material will be supplied by TNPGCL).

Renewal of “O” ring/end collar after lifting the pipe and supporting and dismantling the sleeve coupling joints incl. crane hire charges, T&P’s and consumables (OD 420mm. ID 392mm, thick 15mm) (Material will be supplied by TNPGCL).

Renewal of damaged gasket after removing the wornout studs by locking the pipe, cutting the bolts, cleaning the flange surface, providing the gasket, fixing the pipe and checking the alignment of pipes and attending leak if any after charging the Ash slurry line having OD 406mm. including crane hire charges & consumables and T&P’s (Material will be supplied by TNPGCL).

Arresting of slurry leak by patch welding (TNPGCL welding supply) the punctured portions of the pipe with sleeve cut places at various locations in Ash Slurry Disposal Lines OD 406mm. including all charges such as welding rod.

Devolution of cast basalt Lined/MS lined pipe having OD 406 mm by transporting to work spot to NCTPS stores including all charges such as hire charges for crane, transportation/retravel etc.,

Fixing clamps in the bursted pipe having OD:406mm to avoid slurry leaks (MS 500mm width, MS 300mm width) (Material will be supplied by TNGPCL)

Renewal of damaged and wornout 90/45 degree cast basalt/ceramic/MS bend by new bend including crane hire charges, T&P’s and consumables, Transportation/retrieval (Material will be supplied by TNPGCL).

Hire charges for additional crane (2 Nos) for 1 No. handing & holding the pipe above 6 Mtr elevation and 1 No. for facilitate to stand thw workers above 6 Mtr elevation in the without supporting structure area near back side of ash handing pump house to renewal of pipes /bend/sleeve welding (Hire charges for 14T capacity crane=840/hrs).

IV. Choke Releasing for Ash slurry disposal Lines from Ash handling pump house to ash dyke discharge end.: Releasing the chocked and settled compacted ash by pumping out flushing water in Ash Slurry Disposal Line 1 to 5 by dismantling the existing sleeve coupling & gasket joint at various locations from Ash handling pump house to ash dyke discharge end, including consumables, T&P’s and Crane hire charges.