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13 m Nylon Balloon 1 Set Tender in Japan - 139438549

The NATIONAL UNIVERSITY CORPORATION has issued a Tender notice for the procurement of a 13 m Nylon Balloon 1 Set in the Japan. This Tender notice was published on 13 Apr 2026 and is scheduled to close on 14 May 2026, with an estimated Tender value of Refer Document. Interested bidders can access detailed Tender information, eligibility criteria, and complete bidding documents by referencing TOT Ref No. 139438549, while the tender notice number is and Registering on the platform.

Procurement Summary

Country: Japan

Summary: 13 m Nylon Balloon 1 Set

Deadline: 14 May 2026

Posting Date: 13 Apr 2026

Other Information

Notice Type: Tender

TOT Ref.No.: 139438549

Document Ref. No.:

Competition: ICB

Financier: Self Financed

Purchaser Ownership: Public

Tender Value: Refer Document

Purchaser's Detail

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Tender Details

13 m Nylon Balloon 1 Set
Classification :

0024 Professional/Scientific & Controlling Instruments & Apparatus

Summay of Notice :

⑴ Classification of the products to be procured : 24

⑵ Nature and quantity of the products to be purchased : 13 mφ Nylon Balloon 1 Set

⑶ Type of the procurement : Purchase

⑷ Basic requirements of the procurement :

A The requirements cover the 13-meter diameter nylon balloon used for liquid scintillator containment, which is part of the neutrino detector operated by the Research Center for Neutrino Science, Tohoku University, located in the Kamioka Mine in Hida City, Gifu Prefecture.

B The balloon structure must be computationally verified to withstand the loads generated by the density and level differences between the internal and external liquids, as well as the pressure applied to the gas phase. The top section of the balloon must be designed to be attached to the cylindrical portion of the existing stainless-steel tank. The bottom part of the balloon must be designed for a smoothly connecting flange structure.

C The balloon must be fabricated from specially specified laminated film composed of nylon and EVOH bonded via dry lamination, cut into gores (boat-shaped segments) and jointed using high-frequency welding in a cleanroom environment shielded from external contamination. Rope guides must be welded along the welding lines to secure a rope net in its designated position along the balloon's outer su...

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