Study of an HTGR and renewable energy hybrid system for grid stability

Sato, Hiroyuki; Yan, X.

Nuclear Engineering and Design, 343, p.178 - 186, 2019/03

https://doi.org/10.1016/j.nucengdes.2019.01.010

A hybrid system combining HTGR and renewable energy is investigated to compensate intermittent renewable energy power generation. A new proposal of using the inventory and bypass control devices already built in the gas turbine, is found to be effective to compensate hourly to daily variation of renewable energy. The reactor thermal power remains at constant full power while the heat output is increased or decreased subject to the need of reactor power generation. On the other hand, the massive heat capacity in the graphite core is shown to be sufficient to compensate renewable energy on a time scale of seconds to minutes and up to about 20% of the rated power output of the nuclear plant. Similarly, no additional control devices are required to perform this control operation. These findings demonstrate the technical and economic potential of the HTGR system to maintain the stability of a grid being incorporated with significant portfolios of renewable energy power generation.

CO emission reduction strategy and roles of nuclear energy in Japan

Sato, Osamu; *; ;

JAERI-Research 99-015, 95 Pages, 1999/03

JAERI-Research-99-015.pdf:7.17MB

no abstracts in English

Innovation of energy society and potential of fast reactor cycle

Kamide, Hideki

no journal, , 

Development status of sodium cooled fast reactor (SFR) in Japan is introduced. Potential of SFR utilization, e.g., Uranium effective use and reduction of long term radioactive waste volume, relation between nuclear power and renewable energy system are shown as background information. Development status of SFR in the world and SFR technology development in Japan are also shown. Current idea for Role of Japan Atomic Energy Agency in the strategic road map of fast reactor development in Japan is discussed.

Status of advanced reactor development

Kamide, Hideki

no journal, , 

Recently, energy society is required to achieve stable and reliable energy supply and carbon free energy sources for the Global Warming. Here complementary use of renewable energies and nuclear power and also development status of advanced reactors, i.e., SFR, for sustainable energy source are reported.

Feasibility study of power generation system with thermal energy storage by annual simulation

Fujii, Shoma*; Yamano, Hidemasa; Hayafune, Hiroki; Ohno, Shuji

no journal, , 

The application of thermal energy storage (TES) in power generation systems is an attractive option that can convert variable renewable energy, or stable heat sources, such as reactor heat from small modular reactors (SMRs), into flexible power output. A molten salt-based TES charging reactor heat from SMRs was considered as a case study of Power to Heat to Power system, and was feasibly investigated by annual simulation. A price-following model was developed to simulate heat charging and discharging operation, in which reactor heat is stably charged and its heat is discharged during periods of high electricity spot prices. Although the annual output is slightly lower than the SMR stand-alone operation due to the low-load operation of the steam turbine, the total revenue increases due to the improvement of the electricity spot price at the time of power selling.