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All Journal Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Jurnal Tanah dan Iklim
SANTOSO D
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Energy Environmental Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics

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PERANCANGAN ULANG, PEMASANGAN DAN KOMISIONING SISTEM INFUSER REAKTOR TRIGA 2000 Efrizon Umar; Adis Barjarzali; Tata Kusrna'idi; Ruslan A G; Dadang Suryana; Santoso D
Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Vol 3, No 1 (2002): Februari 2002
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jstni.2002.3.1.1677

Abstract

PERANCANGAN ULANG, PEMASANGAN DAN KOMISIONING SISTEM INFUSER REAKTOR TRIGA 2000. Dalam kegiatan peningkatan daya reaktor TRIGA Mark II, untuk mengurangi konsentrasi nitrogen-16 di permukaan air tangki reaktor telah dilakukan perancangan ulang dan pemasangan sistem difuser yang baru. Uji coba penggunaan sistem difuser ini juga sudah dilakukan dan sistem difuser dapat beroperasi dengan baik. Data percobaan menunjukkan bahwa debit aliran sistem difuser pada pipa utamanya adalah 60 GPM dan harga ini setara dengan kecepatan dispersi nosel sebesar 2.56 rn/s. Pengoperasian sistem difuser pada saat daya reaktor 2000 kW menghasilkan laju dosis di permukaan air tangki antara 30 - 50 mrad/jam, sedangkan laju dosis di permukaan air tangki bila sistem difuser dimatikan adalah antara 110 - 200 mrad/jam. Besarnya laju dosis di permukaan air tangki reaktor TRIGA 2000 pada daya 2000 kW mendekati laju dosis di permukaan air tangki reaktor TRIGA Mark II (sebelum dilakukan peningkatan daya) pada daya 600 kW.
Management of Phosphorus and Organic Matter on an Acid Soil in Jambi, Indonesia SANTOSO D; J. PURNOMO; I GEDE PUTU WIGENA; . SUKRISTIYONUBOWO; R.D.B LEFROY
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 18 (2000): Desember 2000
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n18.2000.%p

Abstract

A field experiment was conducted at Pauh Menang village, Jambi province, to assess crop and soil response to P fertilization, compare inorganic and organic sources of P, and assess the interactions between these sources. The experiment employed an incomplete factorial combination of six levels of inorganic P (0, 19, 38, 57, 76 and 95 kg P ha-1 as SP-6), two organic matters (FYM and stylo), and lime, laid out in a randomized complete block design with four replicates. The experiment was carried out over four seasons, from rainy season 1997/1998 until dry season 1999, however, the second crop failed due to severe drought. Under limed conditions, application of SP-36 at 38-kg P ha-1crop-1 increased soil P content. Repeated application of SP-36 resulted in accumulation of residual P and built up the P status of the soil well above 100 mg P kg-1 soil. The application of SP-36 in combination with OM, stylo or FYM, did not produce higher Colwell P contents in the soil compared with application of inorganic P alone. Grain yields of all corn crops increased significantly from about 0.5 to 3.5 t ha-1 with application of inorganic P at about 57 kg P ha-1. The amount of P fertilizer required to obtain 85% relative yield decreased from about 62 to 40 to 28 kg P ha-1 for crop 1 to crop 3 and to crop 4, providing evidence of the residual effect of P fertilization. The direct use of RP at 42.6 kg P ha-1crop-1 was less effective than the readily soluble inorganic SP-36 at 38 kg P ha-1 crop-1. Liming increased and maintained corn grain yields significantly. Application of OM as FYM or stylo in combination with SP-36 or RP did not resulted in synergistic interactions, with greater increases in yields. The introduction of an erect and fast growing stylo, Stylosanthes guyanensis cultivar CIAT 184, in the cropping system offers a good opportunity to improve fertility of acid soils. The high biomass yield of stylo, ranging from 0.8 to 4.9 t ha-1 per cutting, can be fed directly to cattle or sun-dried, ground and mixed with other materials to enrich feed concentrate. Widespread adoption of this legume would enhance cattle rearing, which in turn would produce more FYM as a source of organic P fertilizer .
Co-Authors . SUKRISTIYONUBOWO Adis Barjarzali Dadang Suryana Efrizon Umar I GEDE PUTU WIGENA J. PURNOMO R.D.B LEFROY Ruslan A G Tata Kusrna'idi