Ｍ
HPCSＳ
pump
HPCSC
heat exchanger
Primary Containment Vessel
abnormal
insulation
resistance
August 30, 2011
Tokyo Electric Power
Company
Seawate
r
Condensate
Storage Tank
（CST）
Seawater
HPCSＣ
pump
Reactor Pressure Vessel
HPCS
pump
Suppression Pool （S/P）
Ｍ
：Motor
ＨＰＣＳ： High Pressure Core Spray System
ＨＰＣＳＣ： HPCS auxiliaries cooling system
ＨＰＣＳＳ： HPCS auxiliaries cooling seawater system
Outline drawing of High Pressure Core Spray System
Unit2 of Fukushima Daini Nuclear Power Station