Yoga Peryoga - Academia.edu (original) (raw)

Papers by Yoga Peryoga

Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan

MATEC Web of Conferences

The province of Riau has the most significant palm oil plantation in Indonesia which has the pote... more The province of Riau has the most significant palm oil plantation in Indonesia which has the potential of the palm oil mill effluent (POME). One way to use this liquid waste is by the anaerobic process into biogas to generate electricity. Based on the assumption of calculated liquid waste can produce biogas about 538 m3 / hour or equal to 4,600 MJ / hour potentially generate electricity about 1 MW. This paper discusses the scheme of the POME Biogas Power Plant project which benefits the palm oil mill which is Built-operate-transfer (BOT) with a duration of 15 years selected as a reference. With this duration obtained IRR of 17.47% higher than at WACC of 15.61% and a payback period of 5.63 years. The 15-year duration gives Investor resilience in case of an increase of loan interest rate to 13% during the repayment period. Also, the use of alternative schemes that may be pursued by biogas products from cleaned digesters is then used as gas fuel to operate diesel generators. Plant Alte...

Articles you may be interested in One step transesterification process of sludge palm oil (SPO) b... more Articles you may be interested in One step transesterification process of sludge palm oil (SPO) by using deep eutectic solvent (DES) in biodiesel production AIP Conference Proceedings 1855, 070004 (2017); 10.1063/1.4985531 The influence of chicken eggshell powder as a buffer on biohydrogen production from rotten orange (Citrus nobilis var. microcarpa) with immobilized mixed culture AIP Conference Proceedings 1855, 070006 (2017); 10.1063/1.4985533 Fouling reduction by ozone-enhanced backwashing process in ultrafiltration of petroleum-based oil in water emulsion

International Journal on Advanced Science, Engineering and Information Technology, 2014

Production cost assessment was based on palm oil mill of 30 metrics tons FFB/h capacity that prod... more Production cost assessment was based on palm oil mill of 30 metrics tons FFB/h capacity that produced EFB residue at app. 20 % wt of the initial FFB fed to the plant. The bio-oil plant will be located in the palm oil mill complex to eliminate the transportation cost of the EFB feedstock. The process included in this calculation is chopping, drying, grinding, pyrolysis, solid removal, bio oil recovery, and storage. The production cost is influenced by the amount of bio-oil production, material cost, operational cost including labor and utility cost. The sensitivity analysis shows that feedstock price drives the production cost. The result concludes that for the current condition, the bio-oil production cost from palm empty fruit bunch seems promising to be implemented in Indonesia. The best option is to have the bio-oil plant integrated with the palm oil mill, where in this case the EFB can be kept at no cost, off the market influence.

Progress in Nuclear Energy, 2008

Inventories of secondary nuclear materials such as plutonium (Pu), minor actinides (MAs) and repr... more Inventories of secondary nuclear materials such as plutonium (Pu), minor actinides (MAs) and reprocessed uranium (RepU), generated in spent fuel in the wake of nuclear electricity production were predicted for the world and Japanese cases by IAEA-VISTA code, which can be applied to the evaluation of the nuclear fuel cycle with thermal power reactors. Three strategic input parameters, i.e., nuclear capacity growth, reprocessing ratio and MOX fuel use ratio, were incorporated in the code as well as other technical parameters with respect to reactor-type share, burnup of individual reactor type, load factor, enrichment, etc. The secondary nuclear material inventories in spent fuel discharged from PWR and BWR were calculated for the nuclear fuel cycle in the world and in Japan. VISTA calculation clarified anticipated quantities of Pu in spent fuel and separated form, quantities of MAs (Np, Am, and Cm) and RepU until 2050. MA data resulted from the VISTA calculation were applied to evaluate the mass balance of Np and MAs in the nuclear fuel cycle for Protected Plutonium Production (PPP: P 3) with the 1 GWe class PWR, and possible numbers of PWR with available quantities of Np and MAs in the world and in Japan were appraised.

Progress in Nuclear Energy, 2005

This paper focuses on improving the proliferation resistance of plutonium resulting from uranium-... more This paper focuses on improving the proliferation resistance of plutonium resulting from uranium-based fuel irradiation. Intrinsic properties of plutonium isotopes with even mass numbers (238pu, 24°pu and 242pu)-in terms of their intense decay heat and high spontaneous fission neutron rates-were used as a measure to improve the proliferation resistance of plutonium itself. The present study explores MA addition effect into LEU (5%235U) and HEU (20%235U) with regard to plutonium proliferation resistance characteristics. Consideration goes beyond critical condition to examine the potential of subcritical system in enhancing the plutonium proliferation properties. Results show that even the doping level of 1% of Np, TrPu or all MA elements into low enriched uranium improves the proliferation-resistant properties of plutonium. A potential for further improvement is achieved by higher doping of minor actinides into high enriched uranium irradiated in a subcritical mode.

… of U, Pu and MAs and …, 2006

... Publication Information. Title, Japanese: English: Prospects of Inventories of U, Pu and MAs ... more ... Publication Information. Title, Japanese: English: Prospects of Inventories of U, Pu and MAs and Mass Balance in PPP Cycle. Author, Japanese: English: Kosaku Fukuda, Yoga Peryoga, Hiroshi Sagara, Masaki Saito. Language, English. Journal/Book name, Japanese: English: ...

BULLETIN-RESEARCH …, 2006

Journal of Nuclear Science and Technology, 2002

The present paper advertises doping of transplutonium isotopes as an essential measure to improve... more The present paper advertises doping of transplutonium isotopes as an essential measure to improve proliferationresistance properties and burnup characteristics of UOX fuel for PWR. Among them 241 Am might play the decisive role of burnable absorber to reduce the initial reactivity excess while the short-lived nuclides 242 Cm and 244 Cm decay into even plutonium isotopes, thus increasing the extent of denaturation for primary fissile 239 Pu in the course of reactor operation. The doping composition corresponds to one discharged from a current PWR. For definiteness, the case identity is ascribed to atomic percentage of 241 Am, and then the other transplutonium nuclide contents follow their ratio as in the PWR discharged fuel. The case of 1 at% doping to 20% enriched uranium oxide fuel shows the potential of achieving the burnup value of 100 GWd/tHM with about 20% 238 Pu fraction at the end of irradiation. Since so far, americium and curium do not require special proliferation resistance measures, their doping to UOX would assist in introducing nuclear technology in developing countries with simultaneous reduction of accumulated minor actinides stockpiles.

Journal of Nuclear …, 2005

The present study focuses on the exploration of the effect of minor actinide (MA) addition into u... more The present study focuses on the exploration of the effect of minor actinide (MA) addition into uranium oxide fuels of different enrichment (5% 235 U and 20% 235 U) as ways of increasing fraction of even-mass-number plutonium isotopes. Among plutonium isotopes, 238 Pu, 240 Pu and 242 Pu have the characteristics of relatively high decay heat and spontaneous fission neutron rate that can improve proliferation-resistant properties of a plutonium composition. Two doping options were proposed, i.e. doping of all MA elements (Np, Am and Cm) and doping of only Np to observe their effect on plutonium proliferation-resistant properties. Pressurized water reactor geometry has been chosen for fuels irradiation environment where irradiation has been extended beyond critical to explore the subcritical system potential. Results indicate that a large amount of MA doping within subcritical operation highly improves the proliferation-resistant properties of the plutonium with high total plutonium production. Doping of 1% MA or Np into 5% 235 U enriched uranium fuel appears possible for critical operation of the current commercial light water reactor with reasonable improvement in the plutonium proliferation-resistant properties.