Handling and Maintenance of equipments of cryogenic plants and Handling of chemicals in laboratories in MSG.

Amount

Transfer of liquid nitrogen from 2000 liters storage container and 500 liter storage container to 300 liter distribution container and user containers according to their requirement.

Dismantling air cooler/oil cooler assembly of air compressor, cleaning the fins of the above, cleaning of filters, changing of couplings and re-fixing.

Dismantling condenser head and liquid nitrogen delivery tube of Cryogenerators,purging with dry nitrogen and re-fixing.Three Cryogenerators.

Maintenance and cleaning of vacuum pumps of rotary type three nos.and two Diffusion pumps.

Maintenance of PSA bed, changing the springs, cleaning and oiling the system. One PSA bed.

Charging of refrigerant gas to chiller units and daily monitoring the chiller temperature.

Transporting liquid nitrogen dewars from various labs to Nitrogen plant and transporting Nitrogen filled dewars to respective labs in MSG building. (including CMPL, CMPL Ext. & PIF buildings) Eight dewars/month.

Maintenance of Battery operated truck, charging, checking and filling of DM water periodically

Transfer of liquid helium from storage container to user containers approximately 13,000 liters.

Leak checking of 5 Cylinders banks(total 150 helium Cylinders ) for every two weeks

Leak testing of helium recovery pipe lines which includes couplings and weld joints (total 1200 mts) from various labs to helium plant in with MSG.one leak testing per month .

Handling and carriage of all types of empty and full cylinders from MSG to stores and from stores to MSG approximately 696 cylinders.

Material handling and transporting of helium Dewars from Helium plant to various labs in MSG and back to Plant. The Cryogenic Dewars has to be handled very carefully. The total handling and transfer of Dewar’s with liquid helium for a week will be Approximately in 400 Kgs to 500 kgs/week for 52 week total weight.

Manual assistance for Dewar preparation for liquid helium transfer like filling liquid nitrogen in the warm Dewar, expelling liquid nitrogen, evacuation and purging with helium gas approximately 6 Dewar’s/2 months

Daily checking and routine maintenance of a 20m³ recovery gas bag. One operation/day.

Weekly once taking inventory of liquid helium Dewar’s in various labs in MSG building. Approximately 6 Dewar’s/52 weeks

Connecting full helium cylinders to the external manifolds and connecting high pressure lines to the helium gas bag and also leak testing the following high pressure lines for any gas leak. Approximately 58 cylinders/month.

Manual assistance in overnight operation of Liquid Helium plant.

Evacuation of FRP liquid helium cryostat

Pre-cooling of the cryostat with liquid nitrogen and expulsion of liquid nitrogen

Liquid helium transfer from storage dewar to the FRP liquid helium cryostat

Assisting the Scientific Officer in calibrating the SQUID sensors for the TDEM measurement.Such as laying transmitter loops,connecting batteries,electronic instruments and filling liquid helium to the cryostat.

Charging the electrical instruments such as Fast FLL electronics, 24V-150AHr power bank, SMARTem24 receiver, Transmitter, Transmitter controller

Shifting the liquid helium cryostat along with the bulky electrical instruments mentioned above to the field by using a battery truck and returning to MSG.

Arrange the equipments with necessary connections for TDEM measurements in the open environment

Laying and removing transmitter coils (size varies from 20 m x 20 m to 100 m X 100 m) at different grids during the TDEM measurements in the open environment.

Assisting the Scientific Officer in operation of TDEM measurement setup during measurement

Cleaning of DPC and LLC chambers of sputtering system

Cleaning of 20 glass and 20 silicon wafers for thin film deposition

Helping the Scientific Officer during Photolithographic patterning

Powder samples by grinding using Mortar / Pestle

Compacting the sample and making pellets

Polishing the single crystals

Polishing Alloy samples

Slicing the samples

Maintenance 4 Nos of Chiller units 50 of times Cleaning (each 75 times hence totally 300).

Refilling the Chiller units

Cleaning and maintaining of fume hood

Preparation of Chemical solutions.

Careful handling and cleaning of all special types of glass wares for solution preparations.

Sample preparation which includes stoichiometry mixture followed by calcinations and heat treatment at elevated temperature.

Operation and maintenance of electrically operated high temperature furnaces.

Maintenance of laminar flow chamber on every alternate day.

P BABU CONTRACTOR (BID ID -3094022)