bids are invited for maintenance of mechanical equipment of pht, moderator, rcm and reactor auxiliaries systems during biennial shutdowns of naps-1&2 (naps-2:2026 & naps-1:2027).; 1 strainer replacement of moderator pump 2 overhauling of moderator pump. 3 top bearing inspection of moderator pump 4 overhauing of mvs (moderator/shutdown system/pht/rcm/eccs/reactor auxillaries). 5 overhauling of pht control valves (cv). 6 overhauling of actuator of mv/cv (moderator/shutdown system/pht/rcm/eccs/reactor auxillaries). 7 channel cover removal and installtion of moderator hx 8 replacement of ion-exchange (ixs) columns. 9 chanel cover removal and installation of end-shield/calandria vault hx. 10 overhauling of end-shield/calandria vault cooling pump & motor 11 overhauling of butterfly valve (size: 250 mm to 500 mm) 12 overhauling of primary feed pump (pfp) 13 motor replacement of pfp including motor shifting to & from mmu shop 14 mechanical seal replacement of shutdown cooling pump 15 overhauling of shutdown pump and motor. 16 channel cover removal & box-up of shutdown hx. 17 motor replacement of shutdown cooling pump. 18 overhauling of spare motor of primary feed pump/shutdown cooling pump. 19 overhauling of primary circulating pump (pcp) 20 overhauling of spare motor of primary circulating pump (pcp). 21 motor replacement of primary circulating pump (pcp). 22 overhauling of osu (of pcp) pump & motor. 23 manhole cover opening & box-up of steam generator. 24 handhole cover opening & box-up of steam generator. 25 assistance in shifting of material/machines of sg tube cleaning system and assistance in cleaning of sg tubes with provided arrangement. 26 manual tube cleaning of sg/moderator hx/shutdown hx/bleed cooler/calandria vault hx (for smooth insertion of ect probe) through brush. 27 channel cover opening, assistance in decontamination and box-up of bleed cooler. 28 removal, shifting and installation of heavy water system relief valves (rvs). 29 eccs rupture disc (rd) replacement 30 overhauling of eccs pump and motor 31 inspection of eccs coarse mesh (installed underwater) 32 dismantling and box-up of eccs hx 33 opening & closing of equipment door of main air lock (mal). 34 replacement of rubber seal of equipment door of main air lock (mal). 35 opening and installation of hatch block. 36 snubber removal, shifting, assistance in testing and installation. 37 removal & installation of jig-saw panel inside fuelling machine (f/m) vault 38 removal and installation of step-panel inside fuelling machine (f/m) vaults. 39 physical creep gap measurement in coolant channel. 40 creep adjustment of coolant channel 41 re-positioning of coolant channel 42 saa nut cutting from coolant channel. 43 mock-up and shifting of tools/tackles for rcm drives mechanism removal & installation. 44 rcm drives mechanism removal & installation. 45 rcm drives ball screw assembly replacement. 46 rcm drives motor unit gearbox replacement job. 47 shifting of tools/tackles at mock-up facility and mock-up of cobalt element replacement. 48 cobalt element shielding flask maintenance. 49 removal & re-installation of shielding capsules in ep between pump room & boiler room. 50 shifting of cpb, cobalt element removal tools, etc to pump room and boiler room for cobalt element replacement: 51 cobalt element replacement (upper and lower) 52 pss lower chamber replacement. 53 pss lower chamber mounting flange gasket replacement. 54 pss upper chamber replacement. 55 pss lower chamber inspection window o-ring replacement/assistance in wire rope inspection/dashpot oil inspection. 56 mock up/qualification activity at barcis mock-up facility for highly skilled worker for 8 hrs. 57 mock up/qualification activity at barcis mock-up facility for skilled worker for 8 hrs. 58 mock up/qualification activity at barcis mock-up facility for semi-skilled worker for 8 hrs. 59 shifting, installation, removal & decontamination of barcis set-up (mechanical & control). 60 assistance in barcis activity of volumetric examination (round o clock in 12 hrs shift.) 61 assistance in barcis activity for sag/channel id measurement (round o clock in 12 hrs shift) . 62 heavy water system flange joint gaskets/valve diaphragms replacement (size upto 3”). 63 heavy water system flange joint gasket replacement (flange size- above 3”). 64 inspection/maintenance and testing of vent/gas traps/check valve.