Judul: Desain elemen bakar dan elemen kendali reaktor RSG-Gas menggunakan paket program MNCP
Abstrak: Desain elemen bakar dan elemen kendali merupakan suatu kegiatan yang sangat diperlukan untuk keperluan perhitungan dan analisis maupun validasi terhadap suatu eksperimen dalam reaktor. Dengan adanya desain elemen bakar dan elemen kendali yang dibuat menggunakan paket program MCNP (Monte Carlo N-Particle) maka akan dimungkinkan desain model teras, sehingga dapat dilakukan perhitungan fluks neutron dan keff .
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Judul: Studi Desain Neutronik Reaktor Air Didih Berumur Panjang Berbahan Bakar UO2
Abstrak: Dengau menggunakan sistem kode SRAC95 (Standard Reacto:: Ana~sis Code) dilakukan studi desain dan analisis reaktor air didib (BWR) bersiklus operasi sekitiu'" 15 tabun dengan daya 150 MWt, 300 MWt dan 450 MWt. HasH penelitian ll1enWljukan nilai faktor multiplikasi dari reaktor 150 MWt berkisar antara 1.1775186 pada awal siklus dan 0.99712-1-3 pada akhir siklus, sedangkan untuk reaktor 300 MWt mempunyai nilai antara 1.1739997 pada awal siklus dan 0.9956313 pada akhir siklus dan nilai untuk reaktor 450 MWt berkisar antara 1.1875681 dan 0.9951285 pada akhir siklus. Nilai reaktifitas reaktor 150 MWt berkisar autara 15.75 % pada awal siklus dan -0.29 % pada akhir siklus, sedangkan nilai reaktifitas reaktor 300 MWt berkisar antara 14.82 % pada awal siklus dan -0.44 % pada akhlr siklus dan nilai reaktifitas reaktor 450 MWt berkisar autara 15.79 % pada awal siklus dan -0.49 % pada akItir siklus. Distribusi fluks neutron
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Judul: Biology and ecology of the buffalo fly, haematobia exigua de meijere (diptera:muscidae)
Abstrak: The life history of the buffalo fly was observed at room temperature of 27°-29.5°C and at a relative humidity of 48-68 percent. The eggs hatched after 17-22 hours, with an average of 18 hours. First instar larvae measured 1.25 + 0.16 mm long and 0.27 + 0.037 mm wide. reach the second larval stage. It took 6-12 hours to the second instar larvae measured 2.676 +0.187 mm long and 0.353 +0.028 mm wide. The second instar took about 12-24 hours to reach the third larval stage. The third instar measured 6.833 + 0.189 mm long and 0.919 + 0.051 mm wide. It took about 2-3 days for the third instar to become pupae. Duration of the pupal stage was about 5-7 days before the adults emerged. Under laboratory condition, the buffalo fly completed its life cycle in 9.5 to 10.5 days, whereas under field condition it took 9-14 days with an average of 10.5 days. The growth ratio which was based on the measurements of the cephalo-pharyngeal skeleton of each instar was 1.797. The preoviposition period was 8-12 days and mating usually occurred on the 6th or 7th day. The longevity of the male was 29 days, whereas it was 32 days in the female. The range of egg production under laboratory condition was between 20-139 per female fly. The belly and hind legs of the carabao were the most preferred habitat either during cloudy and cool dry or shiny and warm day. When the weather was clear and the carabao was in the shade, the flies tended to be more distributed particularly on the shoulder, dewlap, back and horns. The carabaos had relatively fewer Musca sp. and Stomoxys calcitrans than cattle; never the less carabaos had a higher infestation of buffalo fly than cattle. Oviposition occured either during the day or night but the buffalo flies were more active during the night than in the day time. The effect of various lengths of exposure time of manure in relation to the oviposition was profound. observed, the maximum number of the buffalo flies was occurred when the dung was exposed for 30 minutes. With increasing time of exposure the number and variety of insects also increase. It was evident that Sepsidae and psychodidae were the most dominant insects emerging from the dung. The number of buffalo flies also increased with increasing
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