Handling, transportation, fabrication, erection, welding, inspection of stainless steel liner, water fill test, erection of equipment, supports and its accessories in Reactor buildings of KKNPP Unit 3 and Unit 4

Amount

Fabrication, Erection and welding of Stainless steel liner for fuel pool, cask, decontamination pit and floors at various elevations: Receipt of free issue materials from NPCIL stores, handling, transportation, uncrating, preparation of IMIR (incoming material inspection report), de-preservation, storage,submission and acceptance of work procedure, quality plan, preparation of detailed drawings(DMS), cutting plan, marking, cutting, grinding, bending, fabrication, erection, fit up, welding of liner, cover strips using GTAW process using filler and welding electrode issued on free issue basis, carrying out NDE like visual, dye penetrant test inspection & Vacuum box testing of liner for fuel pool, cask, decontamination pit at various elevations inside reactor building as per drawings and tender technical specifications. This work also includes taking field measurements, grinding & cleaning the existing embedded parts to required finish & level, handling, shifting of liner plates to the location using contractor crane, providing manpower, necessary tools, tackles, consumables like argon gas, scaffoldings, welding & cleaning consumables, fall arrestors, industrial ventilation blower fan, flexible elephant ventilation duct for fume removal with length shall be minimum 20m for working inside the fuel pool for the entire working area, preparation of reports and as built, submission for acceptance.

Erection of Fuel Pool, Cask Compartment, decontamination pit, floor and wall liner of thickness up to 5mm

Welding of fuel pool, cask compartment ,decontamination pit, floor and wall liner of thickness up to 5mm.

Handling, assembly, welding, erection of fuel pool racks and other accessories : Receipt of free issue material , handling, transportation, uncrating, submission and acceptance of work procedure, quality plan, preparation of IMIR, de-preservation, shifting inside reactor building, submission of tilting and lifting schemes, assembling, erection in the designed position, alignment, fit up, welding using GTAW / SMAW process using welding electrode and filler wire issued on free issue basis, visual inspection of fuel pool rack supports, racks and other accessories as per drawings and tender technical specifications. This work also includes cleaning of support embedded parts, survey using optical instruments for level and horizontality, providing shim plates for alignment, fastening of bolts, washers and nuts to required torque using hydraulic torque wrench, multiple handling of components during assembly, providing scaffoldings/platforms, manpower, machineries, optical survey instruments, welding & cleaning consumables, tools and tackles, high quality kerosene/ acetone, argon gas, painting of welded area of equipment, preparation & submission of Reports and as built details for acceptance.

Fuel pool supports and other fuel pool accessories

Fuel Pool racks

Vacuum box testing of the welding joints of various configurations (RM): Development of procedure , provide vacuum box of various sizes and profiles, identification of the test joints, pre-cleaning , carryout vacuum box testing on weld joints at various locations and elevations by ISNT/ ASNT level-II qualified personnel as per drawing and technical specification, preparation of reports and submission for NPCIL acceptance. This work also includes arranging necessary manpower, erection of scaffolding, vacuum pump, calibrated vacuum gauge, tools tackles & consumables such as cleaning agents etc

Dye penetrant examination: Development of procedure , identification of joints , cleaning , carrying out Dye penetrant testing as per the procedure , drawing and technical specification by ISNT/ ASNT level-II qualified personnel, preparation of reports & submission for acceptance, post test cleaning . This work includes providing scaffolding, arranging manpower, tools, tackles, all the DPT consumables of NPCIL approved brands, cleaning consumables.

Radiographic Testing of weld joints: Development of procedure & technique sheets, identification of weld joints, providing & cutting the films to the required dimensions, providing & shifting of radiographic cameras, films, & its accessories, etc to location, placing the joint identification markings on the film cassette, carrying out radiographic examination of the weld joint as per applicable RF codes & standards, drawings and technical specification, processing the films, interpretation of results, preparation of reports and submission for acceptance. This works includes providing radiography cameras, radiographic sources, establishing storage facilities for RT sources as per AERB guide lines, dark room facility & other processing facilities for processing films, RT film digitizer, RT film storage racks, ISNT/ ASNT level-II qualified personnel, manpower, tools & tackles, consumables as required for the work.

Water Fill Test: Water fill test of fuel pool after completion of liner with single or multiple attempts by plugging all the penetrations, drain pipelines, sealing/blanking of sluice gates and providing necessary arrangements for water filling and carrying out hydraulic tests by filling the fuel pool with DM water and maintaining for 48 hours and check for leaks or level drops. if any leaks/level drop observed, the same shall be identified and rectified by draining water and fill test to be carried out again by filling and level of liquid shall not fall for qualification of fuel pool as per the technical specification and drawings, preparation of reports and submission for acceptance. This works also includes supply of pumps, transportation, storage, moving/leading the pumps to the working location, erection, testing and commissioning, supply of power cables, distribution boards, necessary electrical accessories, for the operation of pump, providing necessary manpower, tools and tackles, scaffolding arrangements, installation of hoses/pipes ( GI pipes and bends) up to 80NB size for filling DM water from designated point, dewatering of water , cleaning and removal of plugging, restoration and carrying out NDE, maintenance of pumps and handing over to NPCIL after overhauling as per the technical specification. Note: Supply of DM water at designated point is in the scope of NPCIL.

Carrying out hydraulic water fill test of fuel pool with no drop in level for successful completion as per technical specifications.

Supply, installation, commissioning of submersible ( Dewatering) pumps with 3 phase , 5HP power rating and minimum discharge head of 20 meters and minimum discharge capacity of 400 LPM as per technical specifications.

Supply, installation and commissioning of monobloc pumps with 3 phase, 2HP power rating and minimum discharge head of 20 meters and minimum discharge capacity of 240 LPM as per technical specifications.

Supply, installation, commissioning of submersible ( Dewatering) pump with 3 phase and 1HP power rating and minimum discharge head of 20 meters and minimum discharge capacity of 120 LPM as per technical specifications.

Carrying out dewatering in various buildings and locations using supplied dewatering pumps

Supply, Erection and dismantling of aluminium scaffolding: Supply of standard aluminium scaffolding made of tubular construction as per standard EN 1004 having a minimum of 6 no's of double width modular access towers of size of 1490X1965mm and platform size of 1220X1730mm with interconnecting rigid bridge platform connecting the towers and access platform with climbing option on anti skid rungs , internal ladders ( in 2 towers ) for working at heights up to 20m, multiple( 3 no's) level working platform for every 2.2m height having a safe working load of minimum of 800kg , interlocking toe boards, cross supports ,connecting braces with trigger action snap lock mechanism, stabilizers, base plates, clamps, base locking , guard rails, trap door, platforms , ladders, approach / working platforms and all its accessories . This work also includes supply of fall arrestors, spares accessories like castor wheel for the modular access tower (qty shall be for minimum of two towers) and supply of accessories. The scaffolding platforms shall be in sufficient quantity for carrying out the liner works with minimum of 8 gangs in the fuel pool for the entire working area. After completion of works, removal/dismantle, handover the scaffolding and the accessories to NPCIL after overhauling/replacing the damaged materials as per the technical specifications

WELTECH ENGINEERS

SAKTHI HI-TECH FABRICATIONS PRIVATE LIMITED