Hamaoka Nuclear Power Station Reactor No. 3 Undergoes Periodic eスポーツベッティング

1. Major inspections

a. Reactor

eスポーツベッティング of reactor pressure vessel, structures inside reactor and fuel

b. Reactor cooling system equipment

eスポーツベッティング of pipes, heat exchangers, pumps and valves

c. Measurement and control system equipment

eスポーツベッティング of control rod drive system, eスポーツベッティング and calibration of various measurement devices

d. Radiation control equipment

eスポーツベッティング and calibration of various radiation control measurement devices

e. Reactor containment equipment

Seal testing of reactor building, containment equipment

f. Steam turbine equipment

Overhaul eスポーツベッティング of steam turbine equipment, disassembly and eスポーツベッティング of main valves, eスポーツベッティング of auxiliary equipment

g. Other

eスポーツベッティング of scrapped equipment, fuel equipment, emergency backup generator equipment, electrical equipment, etc.

2. Major work

a. Of the total 764 fuel assemblies, some 172 are to be replaced.

b. Air purge pipes will be positioned in the reactor isolation cooling system as reactor pressure vessel head spray pipes.*1

c. The control unit for the automatic switching unit*2 for the control rod drive mechanisms will be replaced, and there will also be a detailed eスポーツベッティング of its ancillary equipment.

*1  The reactor pressure vessel head spray pipes in the reactor isolation cooling system are pipes that spray cooling water from the top of the reactor pressure vessel to cool steam, in order to efficiently cool the reactor pressure vessel when the plant shuts down.

*2  The automatic switching unit for the control rod drive mechanisms is a device that attaches and detaches the drive mechanisms used to insert and withdraw the control rods.
The control rod drive mechanisms are positioned in the lower part of the reactor pressure vessel, and are replaced by remote control using the automatic switching unit.