Leak Testing of WWER-440 Fuel Assemblies in Slovak Wet Interim Spent Fuel Storage Facility

M. Mikloš, V. Kršjak, V. Slugeň / SUT, Faculty of Electrical Engineering and Information Technology / Department of nuclear physics and technology / Slovakia

16th Symposium of AER on VVER Reactor Physics and Reactor Safety (2006, Bratislava, Slovakia)
Physical Problems of Spent Fuel Decommissioning and Radwaste


An accelerated monitoring system designed for the Slovak wet interim spent fuel storage facility in NPP Jaslovské Bohunice bases on the new designed “cesium detectors” is presented in the paper. Since 1999, leak tests of WWER-440 fuel assemblies are provided by special leak tightness detection system “Sipping in Pool” delivered by Framatome-anp with external heating for the precise defects determination. Although, this system seems to be very effective, the detection time of all fuel assemblies in one storage pool is too long. Therefore, a new “on-line” detection system, based on new sorbent NIFSIL for effective 134Cs and 137Cs activity was developed. Design of this detection system and its application possibility in Slovak wet interim spent fuel storage facility as well as the first results are presented.

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