scholarly journals Natural radionuclide of Po210 in the edible seafood affected by coal-fired power plant industry in Kapar coastal area of Malaysia

2011 ◽  
Vol 10 (1) ◽  
Author(s):  
Lubna Alam ◽  
Che Abd Rahim Mohamed
Keyword(s):  
Power Plant ◽  
Coastal Area ◽  
Natural Radionuclide ◽  
Plant Industry

scholarly journals Dynamic analysis of the turbo – generator foundation structure

2020 ◽  
Vol 310 ◽  
pp. 00035
Author(s):  
Jan Benčat ◽  
Michal Tomko ◽  
Michal Lukáč
Keyword(s):  
Numerical Analysis ◽  
Power Plant ◽  
Dynamic Analysis ◽  
Dynamic Stiffness ◽  
Plant Industry ◽  
Characteristic Analysis ◽  
Current Trends ◽  
Turbo Generator ◽  
Foundation Structure

This paper provides view of current trends in the field of testing and numerical analysis of dynamic loading structures. It describes what is the role of structure dynamic characteristic analysis in the management of the structures construction and maintenance in power plant industry. The main objective of this study is the dynamic analysis of power plant turbo– generator foundation structure (TGFS) of electrical industry operation. Main purpose of performed study in 2017 was to check dynamic stiffness TGFS after fifty years TG (100 MW) performance which then enabled to prepare relevant data for making design renovation and strengthening of the TGSF.

Discovery of radiocesium-bearing microparticles from ocean samples emitted from the Fukushima Daiichi Nuclear Power Plant accident

2020 ◽  
Author(s):  
Hikaru Miura ◽  
Takashi Ishimaru ◽  
Yukari Ito ◽  
Jota Kanda ◽  
Atsushi Kubo ◽  
...  
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Coastal Area ◽  
Hot Spots ◽  
Nuclear Power ◽  
Particle Diameter ◽  
Suspended Particles ◽  
Marine Samples ◽  
Sinking Particles ◽  
Fukushima Daiichi

<p>Introduction: A large amount of radioactive Cs was emitted into the environment by the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. Adachi et al. (2013) first reported radiocesium-bearing microparticles (CsMPs) from aerosol filters. Subsequent researches showed that the CsMP is SiO<sub>2</sub> glass with Cs, Cl, K, Fe, and Zn mainly contained in the particle. Diameter of CsMP is ~1-10 μm and <sup>137</sup>Cs radioactivity is ~0.5 to 10<sup>2</sup> Bq. It has been suggested that the CsMP was mainly emitted from Unit 2 or Unit 3 of FDNPP based on the <sup>134</sup>Cs/<sup>137</sup>Cs activity ratio in the samples. Miura et al. (2018) reported CsMPs from the suspended particles in river water and their effect on K<sub>d</sub> value, which suggested CsMPs may exist in the ocean transported through rivers. Kubo et al. (2018) and Ikenoue et al. (2018) reported hot spots in the ocean samples by autoradiography but they did not separate CsMPs from these spots. In this presentation, we first report CsMPs separated from marine suspended particles, sinking particles, and sediments in coastal area of Fukushima and compare them with CsMPs from the terrestrial samples.</p><p>Method: We collected suspended particles (2011, 2013, 2015), sinking particles (2014), sediment cores (2011) from coastal area of Fukushima. By a wet separation method (Miura et al., 2018), we separated CsMPs from these samples. After measurement of radioactivity with a high-purity germanium semiconductor detector, scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS) analyses were performed for separated CsMPs. Using autoradiography, we calculated <sup>137</sup>Cs activity of unseparated hot spots over 0.1 Bq, which may be CsMPs.</p><p>Results and discussion: We separated 5 CsMPs from marine samples. The results of SEM-EDS analyses showed that these CsMPs have almost similar characteristics to the reported CsMPs because they mainly consist of Si, Cs, Fe, and Zn.  Their <sup>134</sup>Cs/<sup>137</sup>Cs showed that the CsMPs were from Unit 2 or 3 of FDNPP. <sup>137</sup>Cs radioactivity per volume is also similar to reported CsMPs from Unit 2 or 3. In this presentation, we will show the effect of CsMPs on K<sub>d</sub> values. CsMPs in the ocean samples will make apparent K<sub>d</sub> values be higher than intrinsic K<sub>d</sub> values related to the adsorption-desorption reaction to the clay minerals, which may explain the large variation of Cs concentration in marine samples.</p>

Kadar Logam Berat Besi (Fe), Seng (Zn) Pada Sedimen Dan Jaringan Lunak Kerang Hijau (Perna viridis) Di Perairan Tambak Lorok Semarang

2018 ◽  
Vol 6 (3) ◽  
pp. 173-180
Author(s):  
Dian Dwi Triantoro ◽  
Djoko Suprapto ◽  
Siti Rudiyanti
Keyword(s):  
Power Plant ◽  
Soft Tissue ◽  
Atomic Absorption ◽  
Coastal Area ◽  
Quality Measurement ◽  
Atomic Absorption Spectrophotometer ◽  
Perna Viridis ◽  
Steam Power ◽  
The Third ◽  
Household Activities

ABSTRAKLimbah yang berasal dari aktifitas manusia diindikasikan mengandung logam berat Besi dan Seng yang berasal dari industri, PLTU, pelabuhan Tanjung Mas Semarang dan kegiatan rumah tangga di sekitar perairan Tambak Lorok. Penelitian ini bertujuan untuk mengetahui kadar logam berat Besi dan Seng pada sedimen, dan jaringan lunak kerang hijau (P. viridis) di perairan Tambak Lorok, Semarang. Pengambilan sampel dilakukan pada tanggal 14 Oktober 2016 dan 06 Maret 2017 sampel yang di ambil berupa air, sedimen dan biota kerang hijau dan pengukuran kualitas perairan. Penentuan titik sampling berdasarkan kebiasaan nelayan mengambil ataupun membudidayakan kerang hijau dengan membagi menjadi tiga stasiun dengan jarak antar stasiun satu dan stasiun dua yaitu kisaran ±500 meter kemudian jarak dari stasiun dua dengan stasiun tiga yaitu kisaran ±1 km. Untuk mengetahui kadar logam berat menggunakan metode SNI atau APHA yaitu AAS (Atomic Absorption Spectrophotometer). Hasil penelitian menunjukan kadar logam berat besi pada air yaitu <0,001 hingga 0,062 dan seng kisaran <0,001 - 0,009 mg/l, sedangkan untuk sedimen dengan rerataan (Fe) 50498,5 mg/kg hingga 55616,3 mg/kg kemudian kandungan logam berat sedimen rataan (Zn) 69,51 mg/kg hingga 403,45 mg/kg, selanjutnya untuk kadar logam berat yang terdapat pada jaringan lunak kerang hijau adalah (Fe) 102,52 mg/kg hingga 129,72 mg/kg dan (Zn) 13,75 mg/kg hingga 62,84 mg/kg. Hasil yang didapat menggambarkan bahwa sampel yang sudah di analisis bernilai fluktuatif. Kata kunci: Pesisir; Logam Berat; Fe; Zn; Sedimen; Kerang Hijau; AirABSTRACKThe waste that originated from human activities is indicated in having the content of Iron (Fe) and Zinc (Zn) from the industry, coal fired steam power plant (PLTU), Tanjung Mas Semarang harbour and household activities near the coastal area of Tambak Lorok. This study aims to know the condition of Iron (Fe) and Zinc (Zn) in the sediment and soft tissue of mussels (Perna viridis) at Tambak Lorok waters, Semarang. The sampling has been done on 14th October 2016 and 6th March 2017. The sampling is taken from water, sediment, mussels biota and waters quality measurement. The points of sampling are determined based on fishermen customs in taking and cultivating mussels, also divided to three stations with the distance of the first to the second station is around 500 meters, the distance of the second to the third station is around 1 kilometers. The content of Iron (Fe) and Zinc (Zn) is known by using SNI or APHA methods, that called as AAS (Atomic Absorption Spectrophotometer). The result shows that the content of Iron (Fe) in water is <0,001 to 0,062, and Zinc (Zn) is <0,001 to 0,009 mg/l, while for the sediment with rerataan is (Fe) 50498,5 mg/kg to 55616,3 mg/kg and the content of sediment rerataan metal (Zn) is 69,51 mg/kg to 403,45 mg/kg, and next the content of metal in soft tissue of mussels is (Fe) 102,52 mg/kg to 129,72 mg/kg and (Zn) is 13,75 mg/kg to 62,84 mg/kg.  Key words: Costal Area; Meta;, Fe; Zn; Sediment; Mussels; Water

Development of a Scrubber in the Deaerator

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Sungyeoul Lee
Keyword(s):  
Power Plant ◽  
Dissolved Oxygen ◽  
Saturation Temperature ◽  
Operating Conditions ◽  
Feed Water ◽  
Outlet Section ◽  
Plant Industry ◽  
Efficient Design ◽  
Efficient Removal ◽  
Standard Requirement

A new design of a scrubber has been developed and used in a deaerator. Deaeration of feed water in the boiler system is an essential process in industry today. Any facilities operating with steam have at least one deaerator to remove dissolved oxygen from the feed water. For an efficient removal process, the feed water has to be heated up to the saturation temperature at the pressure in the outlet section of scrubber. Numerical simulations were conducted for various designs of a scrubber with data used in the power plant industry in Korea and an efficient design was drawn from the numerical results. Experiments were conducted with new design of the scrubber for operating conditions similar to those in a power plant. The experimental results showed an excellent deaerator performance, satisfying the standard requirement of dissolved oxygen level of 5–7 ppb in industry.

scholarly journals Analisa Unjuk Kerja Sistem PLTG di PT Indonesia Power Unit Pembangkitan Bali

Jurnal METTEK ◽  
2018 ◽  
Vol 4 (1) ◽  
pp. 16
Author(s):  
Musa Aleksander Partogi ◽  
I Gusti Bagus Wijaya Kusuma ◽  
Ketut Astawa
Keyword(s):  
Power Plant ◽  
Fuel Consumption ◽  
Theoretical Basis ◽  
Production Cost ◽  
Diesel Oil ◽  
Plant Industry ◽  
Fuel Cost ◽  
Gas Fuel ◽  
Total Fuel Consumption ◽  
Gas Power Plant

Pembangkit Listrik Tenaga Gas (PLTG) merupakan salah satu mesin pembangkit yang digunakan PT. Indonesia Power UP Bali dalam kegiatan industri pembangkit di Indonesia. Dalam pengoperasiannya mulai tahun 1994 hingga sekarang mesin PLTG masih menggunakan minyak solar/HSD sebagai bahan bakar pembangkit.Penelitian ini dimaksudkan untuk menganalisa unjuk kerja sistem PLTG khususnya analisa keekonomian dengan membandingkan penggunaan bahan bakar minyak solar dan gas pada mesin pembangkit. Spesific Fuel Consumption (SFC) adalah rasio perbandingan total konsumsi bahan bakar terhadap daya listrik yang dibangkitkan, SFC digunakan sebagai salah satu cara untuk mengetahui seberapa efisien sebuah mesin pembangkit dan salah satu penentu biaya produksi khususnya biaya bahan bakar yang diperlukan dalam pembangkit.Berdasarkan hasil penelitian dengan harga minyak solar/HSD Rp 7300,- /liter dan gas US $ 11 /mmBTU, didapatkan biaya produksi listrik bahan bakar HSD secara aktual sebesar Rp 2541,86 /kWh, secara teoritis Rp 2336,00 /kWh dan gas secara teoritis Rp 1714,3 /kWh. Jika penjualan listrik Rp 1352,- /kWh, maka dengan menggunakan bahan bakar HSD akan berpotensi rugi sebesar Rp 1189,86 /kWh secara akutal, Rp 984,00 /kWh secara teoritis, dan Rp 362,00 /kWh dengan menggunakan bahan bakar gas. Gas Power Plant (PLTG) is one of the power plant used by PT. Indonesia Power UP Bali in the power plant industry in Indonesia. In operation from 1994 until now the PLTG engine is still using diesel oil / HSD as fuel generator. This research is intended to analyze the performance of PLTG system, especially economic analysis by comparing the use of diesel fuel and gas in generating machine. Specific Fuel Consumption (SFC) is the ratio of total fuel consumption to electric power generated, SFC is used as one way to find out how efficient a generating machine and one determinant of production cost, especially fuel cost required in generating. Based on research results with the price of diesel oil / HSD Rp 7300, - / liter and gas US $ 11 / mm BTU, the actual cost of producing HSD fuel electricity is Rp 2541,86 / kWh, theoretically Rp 2336,00 / kWh and gas theoretically Rp 1714.3 / kWh. If the sale of electricity is Rp 1352, - / kWh, then using HSD fuel will potentially loss as much as Rp 1189.86 / kWh on a theoretical basis, Rp 984.00 / kWh theoretically, and Rp 362.00 / kWh using gas fuel .

Sign in / Sign up

Export Citation Format

Share Document