Status Analysis for the Confinement Monitoring Technology of PWR Spent Nuclear Fuel Dry Storage System

경수로 사용후핵연료 건식저장시스템의 격납감시 기술현황 분석

Baeg, Chang-Yeal;Cho, Chun-Hyung

  • Received : 2015.09.24
  • Accepted : 2015.12.04
  • Published : 2016.03.30


Leading national R&D project to design a PWR spent nuclear fuel interim dry storage system that has been under development since mid-2009, which consists of a dual purpose metal cask and concrete storage cask. To ensure the safe operation of dry storage systems in foreign countries, major confinement monitoring techniques currently consist of pressure and temperature measurement. In the case of a dual purpose metal cask, a pressure sensor is installed in the interspace of bolted double lid(primary and secondary lid) in order to measure pressure. A concrete storage cask is a canister based system made of double/redundant welded lid to ensure confinement integrity. For this reason, confinement monitoring method is real time temperature measurement by thermocouple placed in the air flow(air intake and exit) of the concrete structure(over pack and module). The use of various monitoring technologies and operating experiences for the interim dry storage system over the last decades in foreign countries were analyzed. On the basis of the analysis above, development of the confinement monitoring technology that can be used optimally in our system will be available in the near future.


PWR spent nuclear fuel;Confinement monitoring;Dual purpose metal cask;Dry storage;Pressure sensor


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Cited by

  1. Review of Research on Chloride-Induced Stress Corrosion Cracking of Dry Storage Canisters in the United States vol.16, pp.4, 2018,


Supported by : 산업통상자원부(MOTIE)