METHOD FOR MANUFACTURING NANO-TIO2 AND METHOD FOR PREVENTING STRESS CORROSION CRACKING OF HEATING TUBE OF STEAM GENERATOR IN NUCLEAR POWER PLANT USING THE SAME

• Main Authors: NA, JUNG WON, MAENG, WAN YOUNG, KIM, UH CHUL, KIM, KYUNG MO, LEE, EUN HEE, CHOI, BYUNG SEON
• Format: Patent
• Language: English; Korean
• Published: 26.08.2010
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT THEREOF; METALLURGY; NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS,MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES ASDISCRETE UNITS; NANOTECHNOLOGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

PURPOSE: A manufacturing method of nano-sized titanium dioxide, and a controlling method of a stress corrosion cracking of the steam generator heat pipe are provided to improve the penetration property of the heat pipe for enhancing the stress corrosion cracking resistance. CONSTITUTION: A manufacturing method of nano-sized titanium dioxide comprises the following steps: inserting titanium dioxide to distilled water; and scanning high energy ultrasonic wave to the distilled water to reduce the size of the titanium dioxide into the nano-size. The titanium dioxide is selected from the group consisting of rutile, anatase, and brookite.