Experimental Investigation of Iodine Removal in a Submerged Venturi Scrubber

Severe nuclear accidents can cause over-pressurization and serious damage to the containment of a nuclear power plant, which can result in the release of radioactivity into the environment. Filtered containment venting systems are a nuclear safety system that is designed to control over-pressurization and prevent radioactive fission products from spreading into the environment in the case of a severe accident. Iodine is one of the most harmful products among this list of fissionable products, as it can cause thyroid cancer. The removal of iodine is very important in order to ensure the safety of people and the environment. Thus, an indigenous lab scale setup of this system was developed at PIEAS to conduct research on iodine removal. It is comprised of a compressor for replicating high-pressure accident scenarios, a heater to keep iodine in a vapor form, a dosing pump for the injection of iodine, and a venturi scrubber, submerged in the scrubbing column, containing a solution of 0.2% sodium thiosulphate and 0.5% sodium hydroxide. Inlet and outlet samples were trapped in 0.1 M KOH solution and analyzed via UV-VIS spectroscopy. Operating parameters play an important role in the working of a venturi scrubber. The throat velocity was varied to determine its influence on the removal efficiency of iodine. An increase in removal efficiency was observed with an increase in throat velocity. A removal efficiency of >99% was achieved, which fulfilled the requirements for FCVS.

ANALYSIS OF THE TECHNOLOGY FOR THE PRODUCTION OF GRANULAR GLASS-CERAMIC FOAM AND THE DEVELOPMENT OF MEASURES FOR DUST CLEANING OF WORKING AREAS IN CONSTRUCTION

The system of dust cleaning at the enterprises of the construction industry is considered, in particular, at the production of granulated glass ceramic foam. The analysis of the work of construction industry enterprises and their harmful emissions. The applied methods of protecting working areas from dust, their effectiveness and the need for their use in various industries have been studied. It is proposed to make changes to the dust cleaning system used in the production of granulated glass ceramic foam. To increase the degree of cleaning, it is proposed to install a Venturi scrubber instead of a cyclone.

ANALISA DISPERSI PM2,5 MENGGUNAKAN MODEL GAUSS POINT SOURCE DIKAWASAN INDUSTRI DAN DESAIN VENTURI SCRUBBER BESERTA IPAL UNTUK EFFLUENT VENTURI (Studi Kasus : Industri Peleburan Aluminium PT.X Kecamatan Kesamben, Jombang)

Kegiatan Industri Peleburan Aluminium PT.X mengakibatkan kualitas udara di sekitar industri menurun hal tersebut ditandai oleh beberapa keluhan dari masyarakat, PM2,5 merupakan salah satu partikulat yang ditimbulkan dari proses peleburan aluminium yang mana sangat berpengaruh negatif terhadap kesehatan manusia. Tujuan dari penelitian adalah menganalisis konsentrasi PM2,5 di kawasan penduduk menggunakan model gauss point source serta mendesain alat pengendali pencemar udara venturi scrubber untuk dapur peleburan aluminium beserta instalasi pengolahan air limbah. Hasil perhitungan menunjukkan bahwa konsentrasi PM2,5 di kawasan industri PT.X titik 1 (50 m dari lokasi industri) yaitu 2,7 x 10-5/m3, titik 2 (100 m dari lokasi industri) yaitu 6,7 x 10-6/m3, titik 3 (200 m dari lokasi industri) yaitu 1,6 x 10-6/m3 dari ketiga titik tersebut masih memenuhi baku mutu udara ambient Peraturan Pemerintah Republik Indonesia No. 41 Tahun 1999. Hasil perhitungan desain venturi scrubber diperoleh dimensi venturi diameter throat (lebar) 0,55 m, panjang throat 1,65 m, dan panjang bagian diverging 2,2 m prosentase removal partikulat PM2,5 sebesar 95% dan hasil perhitungan desain IPAL diperoleh untuk bangunan koagulasi dengan dimensi Panjang 0,86 m, lebar 0,86 m dan tinggi 1,2 m, bangunan Flokulasi diperoleh panjang 2,1 m , lebar 4,2 m dan tinggi 2 m, bangunan Sedimentasi dengan diameter 5,6 m dan tinggi 1,57 m. Rencana Anggara Biaya dari perhitungan desain didapatkan untuk desain Venturi Scrubber dan IPAL yaitu sebesar Rp. 83.647.421.