The irradiation tests of materials in HANARO have been performed usually at temperatures below 300℃ at which the RPV(Reactor Pressure Vessel) materials of the commercial reactors such as the light water reactor and CANDU are operated. As VHTR(Very High Temperature Reactor) and SFR (Sodium-cooled Fast Reactor) projects are being carried as a part of the present Gen-IV program in Korea, the requirements for irradiation of materials at temperatures higher than 500℃ are recently being gradually increased. To overcome the restriction in the use at high temperature of the existing Al thermal media, a new capsule with double thermal media composed of two kinds of materials such as Al-Ti and Al- graphite was designed and fabricated more advanced than the single thermal media capsule. At the irradiation test of the capsule, the temperature of the specimens successfully reached 700℃ and the integrity of Al, Ti and graphite material was maintained.

Abstract
 1. 서론
 2. 하나로의 조사공
 3. 하나로의 재료 캡슐
 4. 고온조사용 캡슐
  4.1 단일열매체 캡슐
  4.2 이중열매체 캡슐
 5. 결론
 후기
 참고문헌

• 조만순(한국원자력연구원 하나로운영부) | Man Soon Cho
• 주기남(한국원자력연구원 하나로운영부) | Kee Nam Choo