Patent Number: 
Section: claims

1. A nuclear power generation system comprising:a supercritical water-cooled reactor (SCWR) containing a cooling water in supercritical state; andan emergency core cooling system of a supercritical water-cooled reactor (SCWR),wherein the emergency core cooling system of a supercritical water-cooled reactor (SCWR) comprising:an accumulation tank;a coolant containing neutron poison micro-particles uniformly dispersed in water which is automatically injected by the accumulation tank and wherein the water is in supercritical state while the emergency core cooling system is operated;a refueling water storage tank in which neutron poison micro-particles are contained; anda high-pressure injection pump for re-injecting refueling water and the water gathered in a drainage tank at the bottom of a nuclear reactor building,wherein the neutron poison micro-particles have an average diameter of 7 μm or less. 2. The nuclear power generation system as set forth in claim 1, wherein the neutron poison micro-particle is a material including one or more selected from the group consisting of boron (B), gadolinium (Gd), argentums (Ag) and cadmium (Cd). 3. The nuclear power generation system as set forth in claim 1, wherein the neutron poison micro-particle is boron carbide or gadolinium carbide. 4. The nuclear power generation system as set forth in claim 1, wherein the neutron poison micro-particle is boron oxide or gadolinium oxide. 5. The nuclear power generation system as set forth in claim 1, wherein the neutron poison micro-particle is boron nitride or gadolinium nitride. 6. The nuclear power generation system as set forth in claim 1, wherein the neutron poison micro-particle is metal boride. 7. The nuclear power generation system as set forth in claim 2, wherein the boron comprises an isotope content of 19.9% or more of 10B. 8. The nuclear power generation system as set forth in claim 3, wherein the boron carbide comprises boron with an isotope content of 19.9% or more of 10B. 9. The nuclear power generation system as set forth in claim 4, wherein the boron oxide comprises boron with an isotope content of 19.9% or more of 10B. 10. The nuclear power generation system as set forth in claim 5, wherein the boron nitride comprises boron with an isotope content of 19.9% or more of 10B. 11. The nuclear power generation system as set forth in claim 6, wherein the metal boride comprises boron with an isotope content of 19.9% or more of 10B. 12. The nuclear power generation system as set forth in claim 2, wherein the gadolinium comprises an isotope content of 16.65% or more of 157Gd. 13. The nuclear power generation system as set forth in claim 3, wherein the gadolinium carbide comprises gadolinium with an isotope content of 16.65% or more of 157Gd. 14. The nuclear power generation system as set forth in claim 4, wherein the gadolinium oxide comprises gadolinium with an isotope content of 16.65% or more of 157Gd. 15. The nuclear power generation system as set forth in claim 5, wherein the gadolinium nitride comprises gadolinium with an isotope content of 16.65% or more of 157Gd. 16. The nuclear power generation system as set forth in claim 1, wherein the neutron poison micro-particles have an average diameter of 10 nm to 1 μm. 17. The nuclear power generation system as set forth in claim 6, wherein the metal boride comprises TiB2.