A joint development by Géostock / SN Technigaz has been made in the 1990's inrnorder to provide a safe, reliable and cost-effective solution. Instead of storing pressurized methane directly in underground cavities, the concept is to store LNG at –160°C in hard rock mined cavern equipped with a liner made of membrane containment system. After a first phase dedicated to conceptual design and testing program, the validity of this design was demonstrated.rnThe concept of the underground storage of GNL in lined rock cavern is composed of:rn1. A containment system to ensure LNG containment and rock protection againstrnthermal shock.rn2. A drainage system used during the first months of the storage operation, before the surrounding rock is frozen, to drain water around the cavern and preventrnhydrostatic pressure acting against the containment system.rnA cryogenic pilot cavern was constructed in 2003 at Daejon, South Korea, inrnpartnership with SK Engineering & Construction. The pilot cavern operation started end of 2003 and the first results from this test plant shall be available in 2004. The purpose of this pilot plant is to validate this new technology for underground storage at –160°C of LNG in lined, mined rock caverns.
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机译：由Géostock/ SN Technigaz于1990年代共同开发，以提供一种安全，可靠且具有成本效益的解决方案。不是将加压的甲烷直接存储在地下空腔中，而是将液化天然气存储在–160°C的硬岩开采洞穴中，该洞穴装有由膜密封系统制成的衬里。在进行了概念设计和测试程序的第一阶段后，证明了该设计的有效性。rn内衬岩洞中GNL地下存储的概念包括：rn1。确保LNG密封和防止岩石受到热冲击的密封系统。在存储操作的最初几个月中，在冻结围岩之前，使用了一种排水系统，用于排出洞穴周围的水并防止静水压力作用于安全壳系统。rn2003年，在韩国大田市建立了一个低温试点洞穴，该伙伴关系与SK Engineering＆Construction合作。该试验性洞穴试验于2003年底开始，该试验工厂的第一批结果将于2004年提供。该试验工厂的目的是验证这种新技术的有效性，该技术可用于在–160°C的LNG衬砌，开采的岩石洞穴中进行地下储存。
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