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1,000m対応水理試験機の改良

The improvement on the 1,000m type hydraulic tester

平田 洋一*; 小川 賢*

Hirata, Yoichi*; Ogawa, Ken*

本業務は、サイクル機構が所有する1,000m対応水理試験装置(高温環境型)を適応深度1,500mまで拡大するとともにデータの品質確保や試験の効率性向上等を目的とし改良を実施したものである。主な改良点は次のとおり。(1)適応深度を1,000mから1,500mまで拡大、(2)測定範囲を考透水性側とするために主配管系の内径を拡大、(3)試験区間の前後区間における圧力、温度の連続測定機能の付加、(4)遮水性・耐久性・耐圧性に優れたスライド式パッカーの採用、(5)パッカーの個別拡張・収縮が可能な構造の採用、(6)安定流量制御および高揚程揚水が可能なポンプの採用、(7)試験と並行して試験結果を解析できる機能の付加

In this service, the 1,000 m Type Hydraulic Tester owned by Japan Nuclear Cycle Development Institute was improved for 1,500m hydraulic test. The test also improved on the quality of data and the efficiency of test. Main improved items are as follows. (1)The test depth was increased to 1,500m from 1,000m. (2)The inner diameters of main testing tubes were increased for sifting the targeted permeability to the higher permeability zone. (3)The continuous measuring function of pressure and temperature in both sides of test section were added. (4)The slide end type packers were adopted because of its excellent watertight quality, durability and pressure resistance. (5)The expansion and contraction of the upper and lower packer can be controlled individually, through the independent system for both packers. (6)The pump system that can provide stable flow control and deep draft water pumping was adopted. (7)The simultaneous analysis system was added. By the improvement on the above, the 1,000m Type Hydraulic Tester was remodeled for 1,500m and improved on the quality of data and the efficiency of test.

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