Reactor Vessel
The reactor vessel containing the core requires extremely high reliability to ensure complete safety under extremely high temperatures, high pressures, and neutron exposure. All material specifications are based on comprehensive test data. Large forged steel pieces are adopted to minimize the length of the welds requiring in-service inspections. Improved designs are applied for the head adaptors of the reactor vessel head to reduce residual stresses.
Replaceable reactor vessel heads of MHI have enhanced their corrosion-resistance, thereby importing their "preventive maintenance" function. These heads are now supplied both domestically and abroad.
 |
| 2 Loop | 3 Loop | 4 Loop | 4 Loop(APWR) | |
|---|---|---|---|---|
| Height(m) | 11.5 | 12.4 | 12.9 | 13.6 |
| Thickness(mm) | 168 | 197 | 216 | 255 |
| Inner Diameter(m) | 3.4 | 4.0 | 4.4 | 5.2 |
| Weight(ton) | approx. 240 | approx. 330 | approx. 410 | approx. 590 |
| Maximum Operating Pressure(MPa) | 17 | |||
| Maximum Operating Temperature(°C) | 343 | |||
| Material(Main Part) | Low-alloy steel(SFVQ1A,SQV2A,stainless steel cladding on inner surfaces) | |||
Business contact: Nuclear Energy Systems Nuclear Energy Systems Administration Department Planning Group +81-3-6716-4812
