ANALYSIS OF HELIUM GAS FLOW THROUGH TURBINE NOZZLE FOR MOLTEN SALT POWER REACTOR
Sri Sudadiyo
PTRKN-BATAN, Kawasan PUSPIPTEK Gd. 80, Serpong, Tangerang, 15310
ABSTRACT
ANALYSIS OF HELIUM GAS FLOW THROUGH TURBINE NOZZLE FOR MOLTEN SALT POWER REACTOR. From the viewpoint of energy system and environment, concept for Molten Salt Reactor (MSR) is one type of advanced generation nuclear power reactors which have good potential for electricity generation device. Within MSR, molten salt fuel flows through graphite core channels, to produce thermal neutron. The obtained heat of nuclear fuel was transferred to secondary coolant system through the heat exchanger using closed cycle of helium turbine. The resulted hot helium gas was expanded to the nozzle for running blade at turbine rotor. At the nozzle, crossed area constitutes very critical section, if crossed area was too small then the helium flow will be choked, and if crossed area was too large then turbine cannot yield its best efficiency. This study purposed to determine the characteristic of helium flow with speed of supersonic through nozzle as most important component within gas turbine system in secondary coolant cycle for giving safety on MSR installation operation. The applied solution method was by employed the equations of energy, mass, momentum, state, process. From the obtained results, it can be known that helium flow rate on critical crossed area had the speed of 1 M, critical pressure ratio of 0,49, and critical temperature ratio of 0,75, so that the flow via nozzle had the good characteristic and it could be used to helium turbine at secondary coolant cycle in MSR installation.
Keywords : Turbine, nozzle, helium
Prosiding Seminar Nasional ke-15 Teknologi dan Keselamatan PLTN Serta Fasilitas Nuklir Surakarta, 17 Oktober 2009
REVIEW OF HELIUM IMPURITIES EFFECT ON CORROSION PROCESS OF HTGR REACTOR COOLANT
Sriyono
Pusat Teknologi Reaktor dan Keselamatan Nuklir - BATAN,
Kawasan PUSPIPTEK Gd. 80, Serpong, Tangerang, 15310
ABSTRACT
REVIEW OF HELIUM IMPURITIES EFFECT ON CORROSION PROCESS OF HTGR REACTOR COOLANT. HTGR is an advanced nuclear reactor which has helium gas as a coolant and operates safely at high temperature. Corrosion is one of serious problem must be solved in HTGR caused by its impurities. The impurities of helium gas are H2O, CO, CO2, N2, H2 and CH4 which has various concentrations in HTGR coolant system. Corrosion in HTGR system caused by oxidation and carburization-decarburization process. The results of oxidation are oxide scale and carburization-decarburization promotes the carbide compound. Both of these adhered in the material surface and degraded it. The many experiments have been done to understand the effect of impurities to material in HTGR. The purpose of review is to know the effect of helium impurities to material surrounding and determine the suitable material in HTGR design. Among the materials, 2 1/4Cr-1Mo and modified 9Cr1Mo ferrite steels are considered for application in reactor pressure vessels. Fe-Cr-Ni alloys such as Alloy 800H and austenitic stainless steels are considered for recuperates and reactor internals. Alloys such as 617, Hastelloy X, and Hastelloy XR are considered for components that will be exposed to helium coolant at temperatures up to 900�C. Alloys such as 713LC and Mo-TZM are considered for the turbine blade. Alloys such as A286, 706, and 718, are examined for turbine disk application.
Keywords: impurities, helium, corrosion, coolant, HTGR
Published : Proceeding "SEMINAR NASIONAL PENGEMBANGAN ENERGI NUKLIR II 2009", Jakarta, 25 Juni 2009.
STUDY ON HELIUM TURBINE FOR SECONDARY COOLANT SYSTEM OF MOLTEN SALT REACTOR
Sri Sudadiyo
PTRKN-BATAN, Kawasan PUSPIPTEK Gd. 80, Serpong, Tangerang, 15310
ABSTRACT
STUDY ON HELIUM TURBINE FOR SECONDARY COOLANT SYSTEM OF MOLTEN SALT REACTOR. From the viewpoint of energy system and environment, concept for molten salt reactor (MSR) is one of advanced nuclear reactors which have good potential for electricity generation device. Within MSR, molten salt fuel flows through graphite core channels, to produce thermal neutron. The obtained heat of nuclear fuel was transferred to secondary coolant system through the heat exchanger using closed cycle of helium turbine. The resulted hot helium gas was expanded to the turbine for getting power. This study purposed to determine the performance of helium turbine as main components of secondary coolant cycle in MSR. The applied parameter was pressure ratio, specific heat ratio, and temperature. By placing both of helium turbine and compressor at single shaft, it was obtained approximate 49 % from turbine power output for driving compressor and the residual power to turn on electricity generator. The yielded turbine adiabatic efficiency is 85 % and it is able to improve thermal efficiency for secondary coolant system of MSR.
Keywords : Turbine, efficiency, helium
Published : Proceeding "SEMINAR NASIONAL PENGEMBANGAN ENERGI NUKLIR II 2009", Jakarta, 25 Juni 2009.
ANALYSIS OF HELIUM GAS FLOW THROUGH TURBINE NOZZLE FOR MOLTEN SALT POWER REACTOR
Sri Sudadiyo
PTRKN-BATAN, Kawasan PUSPIPTEK Gd. 80, Serpong, Tangerang, 15310
ABSTRACT
ANALYSIS OF HELIUM GAS FLOW THROUGH TURBINE NOZZLE FOR MOLTEN SALT POWER REACTOR. From the viewpoint of energy system and environment, concept for Molten Salt Reactor (MSR) is one type of advanced generation nuclear power reactors which have good potential for electricity generation device. Within MSR, molten salt fuel flows through graphite core channels, to produce thermal neutron. The obtained heat of nuclear fuel was transferred to secondary coolant system through the heat exchanger using closed cycle of helium turbine. The resulted hot helium gas was expanded to the nozzle for running blade at turbine rotor. At the nozzle, crossed area constitutes very critical section, if crossed area was too small then the helium flow will be choked, and if crossed area was too large then turbine cannot yield its best efficiency. This study purposed to determine the characteristic of helium flow with speed of supersonic through nozzle as most important component within gas turbine system in secondary coolant cycle for giving safety on MSR installation operation. The applied solution method was by employed the equations of energy, mass, momentum, state, process. From the obtained results, it can be known that helium flow rate on critical crossed area had the speed of 1 M, critical pressure ratio of 0,49, and critical temperature ratio of 0,75, so that the flow via nozzle had the good characteristic and it could be used to helium turbine at secondary coolant cycle in MSR installation.
Keywords : Turbine, nozzle, helium
Published : Prosiding Seminar Nasional Ke-15 "TEKNOLOGI DAN KESELAMATAN PLTN SERTA FASILITAS NUKLIR", Surakarta, 17 Oktober 2009
