19. 原子炉圧力容器の更なる損傷の進行と CCI 反応(溶融炉心とコンクリートの反応)による放射性エアロゾルの大量発生 ? ? ? ? ? ? ペデスタル入口 ペデスタル ? ? ? ? ? ? H 2 O, CO 2 H 2 O, CO 2 H 2 , CO エアロゾル エアロゾル エアロゾル エアロゾル
31. Mainly metallic debris (Control Blades, Channel Boxes) Collapsed fuel (ZrO2) from central region of core Continuous boiloff Constant heat source water water
32. Continuous boiloff Constant heat source Constant heat source In several hours, lower plenum completely dries out. Control Rod Guide Tubes
33. Constant heat source Relatively undamaged outer radial regions of core Control Rod Guide Tubes
35. Catastrophic circumferential failure due to creep rupture could eventually occur, in case there is no penetration failures . 6 hours after complete lower plenum dryout
37. 溶融物 Peach Bottom ( 3,514MWt/1,112MWe )の場合 溶融される構造物 重量( kg ) 炉心 A. ジルカロイ製 被覆管 37,000 チャンネル?ボックス 22,900 スペーサ 2,700 B. 燃料( UO2 ) 172,500 C. ステンレス鋼構造物 16,300 D. B 4 C 粉末 1,150 ステンレス鋼構造物 A. 上部格子板 6,900 B. 炉心支持板 9,300 C. 制御棒案内管 88,680 合計 357.43
65. A* B* 追加 Scrubber/Gas Cooler Ventilation System Mode-1/2 Heat Sink Gravel Flow from Suppression Chamber to Drywell *: See “proposed line-up” for system interfaces for A and B for each unit. Option A
66. Heat Sink Gravel Factors to be considered for selection: High thermal conductivity Radiation shielding High performance to absorb radioactive gas/particle.
67. Copper Sphere Shell Zeolite Mixing several different constituents may be considered
68. Unit 1 Core Spray System Helium/Air Injection Point Proposed System Lineup A
69. Unit 1 Isolation Condenser (Alternative Option) B X
70. Unit 1 Atmospheric Control System (Alternative Option) B X
71. To be added To be added Scrubber/Gas Cooler Ventilation System Rx. Bldg. Truck Bay Mode-1/2 Option B1
72. To be added To be added Scrubber/Gas Cooler Ventilation System Rx. Bldg. Truck Bay Blower Mode-1/2 Option B2
73. To be added To be added Scrubber/Gas Cooler Ventilation System Rx. Bldg. Truck Bay Mode-2 Option C
74. Rx. Bldg. Truck Bay Stack Air Gap for Flow Path Air Flow only by Natural Convection Mode-3 See detail “D” See detail “E”