Turbine island

Key features of the 1,300 MWe System 80+ (Bagnal, 1992) are 15% improvement in thermal margin, slower response to upset conditions, no fuel damage up to a 6-in. break, and the ability to withstand an 8-hour station blackout. System 80+ integrates the nuclear island, turbine island, and balance of plant. 

Southern Electric Co. - Turbine Island buildings and systems. 

A 52" turbine is adopted as model TCDF-52, which had already been developed as TC6F-52 for the 1350 MWe BWR, in order to simplify the turbine island... 

The nuclear heat supply system generates heat in the reactor core and produces steam in the IHTS. The IHTS SG is composed of a helical coil counterflow heat exchanger, startup recirculation tank and pump, leak detection system, and isolation valves. Intermediate sodium flows on the shell side of the helical coil tubes, through which water flows to produce superheated steam. Two reactor SGs feed one turbine island to form a power block. 

Turbine island (turbo-generator unit) layout... 

Turbine island vents, drains and relief system. 

Turbine Island Vents, Drains and Relief System... 

Air in-leakage and noncondensable gases removed from the condenser air removal system and the gland seal system are routed to the turbine island vents, drains and relief system, where they are... 

The turbine island vent discharge radiation monitor must measure the eoncentration of radioactive gases in the steam and noncondensable gases disehaiged by the condenser vacuum pumps and the gland seal steam condenser (Seetion 11.5.2.3.3 of Reference 6.1), in order to provide early indication of leakage from the primary to the seeondary side of... 

The turbine island vent discharge radiation monitor alarm is part of the defence in depth claimed for the steam generator tube rupture fault. It reliably detects the radiation released into the secondary system as a result of such a fault and then immediately alerts the operators in the main control room. Without it, recognition by the operators that such an event has occurred would be in jeopardy, with the required remedial actions delayed as a consequence. The monitor provides an alarm in the main control room if concentrations exceed a predetermined set point (Section... 

The turbine island chemical feed system injects the required chemicals into the condensate, the feed water, the auxiliary steam, the service water and the stored demineralised water treatment. It is entirely located in the turbine building. 

No design requirements associated with maintaining safety functions are placed on the turbine island chemical feed system. 

Turbine Island Chemical Feed System (CFS) testing. 

Turbine island vent discharge radiation monitor. This monitor measures the concentration of radioactive gases in the steam and non-condensable gases that are discharged by the condenser vacuirm pirmps and the gland steam condenser. This measurement provides early indication of leakage between the primary and secondary sides of the steam generators. The monitor provides alarm in the main control room. 

The height measured from turbine island floor is 6 m. 

The basic engineering solution for nuclear cogeneration plants is to provide independent main buildings for the two power units, each of which consists of a reactor compartment, main control room building and a turbine island, which includes a turbine compartment, auxiliary systems compartment, deaerator compartment, and electric equipment compartment, Fig. VII-18. 

The turbine island adjoins by the face to the reactor compartment. 

The standard-type turbine island is provided. The diameter of the turbine island is 36.0 m the height to the bottom part of the framework is 33.6 m. 

The turbine island is a two-span construction with an annex from the A line side ... 

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