Tenders Are Invited For Hyper-Kamiokande Pure Water Production And Recirculation System 1 Set Classification Of The Products To Be Procured : 24 Nature And Quantity Of The Products To Be Purchased : Hyper-Kamiokande Pure Water Production And Recirculation System 1 Set Type Of The Procurement : Purchase Basic Requirements Of The Procurement : A This System Is For The Production And Purification Of Ultra-Pure Water For The 260,000 Ultra-Large Water Cherenkov Astroparticle Detector (Hyper-Kamiokande) To Be Installed At The Kamioka Observatory (In Shikama, Kamioka, Hida City, Gifu Prefecture) Of The Institute For Cosmic Ray Research At The University Of Tokyo. B This System Is Designed To Realize The Best Water Quality In The Hyper-Kamiokande Tank By Supplying Ultrapure Water And Returning Water From The Tank To The Recirculation System After The Tank Is Full. Water Purification Using The Recirculating System Should Be Carried Out To Maintain Water Quality During The Water Filling Period. The Gas Phase Of The Measurement Tank And Buffer Tanks Must Be Filled With Radon-Removed Air To Prevent Radon Gas From Dissolving Into The Water. The Following Systems Are Required For These Purposes. Ultrapure Water Production And Supply System Purifying Recirculation System Radon-Removed Air Production System C This Water System Should Have Pure Water Supply And Recirculation Roles And Requires The Necessary Supply Of Radon-Removed Air. Water Supply To The Hyper-Kamiokande Tank. The System Treats The Raw Natural Spring Water, Continuously Supplying Processed Pure Water To A 260,000 Hyper-Kamiokande Tank. In This Natural Water Treatment Process, The Removal Of Particulates And Viable Bacteria, Removal Of Ions Including Uranium, Thorium, And Radium, Increase In Electrical Resistivity, And Reduction Of Radon Shall Be Achieved. Recirculation Process Through The Hyper-Kamiokande Tank After Water Filling To The Tank Is Completed, The Water In The Tank Shall Be Recirculated Through The System Tank To Keep And Further Improve The Water Quality. Radon Removal Air Production System A System For Supplying Radon-Removed Air To The Top 1M Layer Of The Hyper-Kamiokande Tank And Other Buffer Tanks Should Also Be Included In This System So That Radon Does Not Dissolve In Pure Water Due To Contact With The Air Containing A Large Amount Of Radon At The Site. D The Capacity Of Each System Should Be The Followings. Ultrapure Water Production And Supply System > 65/H, Purifying Recirculation System > 155/H (During Recirculation Operation) And > 95/H (During Water Supply Ope- Ration), Radon-Removed Air Production System > 54/H Conditions For System Operation. Continuous Operation Is Possible 24 Hours A Day, 365 Days A Year. Filters And Other Consumables Necessary To Supply Water To A 260,000 Tank Shall Also Be Included In The Procurement. The Institute For Cosmic Ray Research, The University Of Tokyo, Conducts Inspections Once A Day On Weekdays But Does Not Inspect Them On Holidays Such As Weekends And National Holidays. If Various Manual Adjustments Are Required, They Should Be Able To Be Handled Only During The Above Inspections. Scaffolding And Other Facilities Should Be Provided For Safety And Equipment Protection During Inspections And Maintenance. Design For Easy Operation And Maintenance. Have A Support System That Can Respond Quickly To System Failures. E The Quality Of The Raw Spring Water Used Is As Follows. Temperature 11.0, Ph (25) 7.8, Conductivity 170s/, Turbidity F The Ultrapure Water Supplied To The Tank During The Filling Period Must Meet The Following Water Quality. Temperature Below 13, Electric Resistivity 18M Or More At 25, Microparticles 10 Pcs/ Or Less (Particle Size 0.2 Or More) And 100 Pcs/ Or Less (Particle Size 0.1 Or More), Germs 1 Pcs/ Or Less, Dissolved Oxygen Concentration 1Ppm Or Less, Uranium Concentration 0.001Mbq/ Or Less (By Mass Spectrometry), Radium Concentration 0.001Mbq/ Or Less (See Note), Thorium Concentration 0.0001Mbq/ Or Less (By Mass Spectrometry), Radon Concentration 100Mbq/ Or Less (By The Radon Detector Of Icrr, The University Of Tokyo) Note : For The Radium Concentration, It Is Acceptable To Set The Required Water Quality On The Condition That Three Or More Of Calcium, Magnesium, Strontium, And Barium, Which Are In The Same Family As Radium In The Element Number Table, Are Less Than 1/1000 Of The Concentration In Raw Water. G In The Recirculation Process, The Water Quality At The Outlet Of The System Must Meet The Following Conditions : Temperature Below 13, Electric Resistivity 18M Or More At 25, Microparticles 10 Pcs/ Or Less (Particle Size 0.2 Or More) And 100 Pcs/ Or Less (Particle Size 0.1 Or More), Germs 1 Pcs/ Or Less, Dissolved Oxygen Concentration 1Ppm Or Less, Uranium Concentration 0.001Mbq/ Or Less (By Mass Spectrometry), Radium Concentration 0.001Mbq/ Or Less (See Note), Thorium Concentration 0.0001Mbq/ Or Less (By Mass Spectrometry), Radon Concentration 0.01 Mbq/ Or Less (By The Radon Detector Of Icrr, The University Of Tokyo) These Conditions Must Be Met After 70 Days Of Recirculation Process Operation. The Parameters Of The Hyper-Kamiokande Tank Is As Follows ; Height : 71.0M, Diameter Of Water Tank : 68.0M, Capacity : 260Kt, Lining : Sus304, Airtightness : Radon Removal Air Prepared By This System Is Constantly Supplied And Kept At A Positive Pressure Of About +0.3Kpa To Prevent Outside Air From Flowing In. Total Heat Generation Related To Hyper-Kamiokande Tank : Approx. 120. The Introductory Note Will Show The Objects Expected To Be Installed Inside The Tank. H Processed Air Conditions For Rn Removed Air Generation System Are The Following. Supply Capacity 54/H Or More, Particle 1 Piece/ Or Less (Size 0.2 Or More) And 1 Piece/ Or Less (Size 0.1 Or More), Dew Point -60 Or Less, Carbon Dioxide Less Than 10% Of The Air In The Mine, Radon Concentration 1Mbq/ Or Less (By Radon Detector Of Icrr, The University Of Tokyo) To Minimize The Possibility Of Radon Contamination From Outside The Pure Water Production System Into The Equipment, Pay Sufficient Attention To Airtightness And Water Tightness During Construction. In The Design Phase, Care Should Be Taken To Minimize The Number Of Locations Where Radon Gas Contamination Is Likely To Occur. In Selecting Equipment Materials, Choose Materials With As Little Possibility Of Radon Contamination (Minute Cracks, Gaps, Holes, Etc.) As Possible. I When Carrying And Installing The System At The Site, Separate Construction Of The Delivery Route And Interior Work Of The Water System Room Will Be Carried Out Simultaneously, So Coordination Should Be Made With The Parties Concerned. J Provide General Specifications For Each Proposed Device, Including Functions, Performance, Area Occupied (Including Region For Maintenance), Layout, Weight, Power Consumption, And Heat Generation. K An Example Of The Units And Flow Required For Water Purification, Which Is Assumed To Realize The Above Requirements, Will Be Shown In The Introductory Note. Time Limit For The Submission Of The Requested Material : 17 : 00 2 October, 2023 Contact Point For The Notice : Ogasawara Nobuhiro, Contract Team, Kashiwa General Administration Office, The University Of Tokyo, 5-1-5 Kashiwanoha Kashiwa-Shi Chiba 277-8581 Japan, Tel 04-7136-3580 Tender Link : Https://Www.Jetro.Go.Jp/En/Database/Procurement/National/Articles/284036/2023090100840001.Html
