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Nuclear reactor safety politics in the USA
Published in David Toke, Geoffrey Chun-Fung Chen, Antony Froggatt, Richard Connolly, Nuclear Power in Stagnation, 2021
David Toke, Geoffrey Chun-Fung Chen, Antony Froggatt, Richard Connolly
The US nuclear industry successfully opposed the installation of filtered containment venting systems (FCVS) in the PWRs. FCVS allows gases that build up in the contained section of the reactor to be released while filtering out the more dangerous radioactive materials so that these are not released. It was argued that the costs of such work would be greater than the benefits. A version of this system has been ordered by the NRC to be installed at the boiling water reactors (BWRs), but BWRs constitute a minority of nuclear reactors in the USA compared to PWRs, and in any case the Union of Concerned Scientists has criticised the orders issued by the NRC even in this respect as being inadequate (Lochbaum 2012).
Examining Practical Application Feasibility of Bismuth-Embedded SBA-15 for Gaseous Iodine Adsorption
Published in Nuclear Technology, 2020
Seong Woo Kang, Jae-Hwan Yang, Man-Sung Yim
Just like the example design shown in Fig. 6, many designs of the existing filtered containment venting system (FCVS) have prefilter systems (such as cyclone separator, venturi scrubbers, and/or metal fiber filters) to remove aerosols and most of the radioactive materials before the filters for gaseous iodine retention.43,45 Although iodine may have a higher flow rate initially in the beginning overall system, the flow rate would be reduced by the time it reaches the end of the filtration system where the gaseous iodine filter would be stationed. Passing these intermediate subsystems would allow the radioactive material to lose energy and thus result in a decrease in the speed of the gaseous iodine before reaching the gaseous iodine filters.
Research activities on nuclear reactor physics and thermal-hydraulics in Japan after Fukushima-Daiichi accident
Published in Journal of Nuclear Science and Technology, 2018
Shuichiro Miwa, Yasunori Yamamoto, Go Chiba
The purpose of the FCVS is to filter aerosol particles as well as radioactive iodine and cesium to reduce the release of radioactive particles and to prevent the primary containment vessel (PCV) from over-pressurization in case of SA. However, filtration performance of the FCVS with varying boundary conditions and prolonged operation period are yet unknown.