2017 Fall Meeting

Presentation information

Oral presentation

III. Fission Energy Engineering » 304-1 Thermal Hydraulics, Energy Conversion, Energy Transfer, Energy Storage

[2E19-23] Equipments for Accidents

Thu. Sep 14, 2017 5:10 PM - 6:30 PM Room E (B32 - B3 Block)

Chair:Hiroyuki Yoshida (JAEA)

5:40 PM - 5:55 PM

[2E21] Developement of Passive Debris Cooling System

(7)Applicability evaluation of Heat Resistant Materials

*YOSHIRO NISHIOKA1, HIDEKI HORIE1, SATORU KUBOYA1, TAKAHASHI TAKAHASHI1, MIKA TAHARA1, TAKAHUMI TSUJI2, TADASHI FUJII3 (1. TOSHIBA, 2. CHUBU Electric Power, 3. HITACHI-GE Nuclear Energy)

Keywords:Refractory material, MCCI, debris

The Passive debris cooling system provides a means for stably holding the melt core flowing down from the pressure vessel at the bottom of the containment vessel. As a result, breakage of containment boundary by high-temperature molten core and generation of hydrogen due to concrete erosion are suppressed, and events of severe accident are mitigated. In this system, a high melting point heat resistant material is laid on the containment vessel floor to receive and hold a high temperature molten core (corium).
In this presentation, we introduced the heat-resistant erosion rate evaluation model developed in the national project and carried out the actual plant analysis using it. As a result, we found that the result that MCCI was suppressed by laying zirconia refractory material.