Modernization of the turbine set and auxiliary equipment of unit 9 consists in performing the necessary inspections in accordance with the DTR requirements, performing the necessary restoration procedures, carrying out the required UDT tests and inspections, and introducing solutions used on the remaining units.

I Diagnostics before modernization

1. Measurements of the dynamic state - before and after modernization.

2. Levelling measurements of bearing racks (hot and cold state before modernization).

3. Diagnostics of the control system - before and after modernization.

4. Measurement of the coastdown time from rated revolutions to revolutions of the turning machine and from revolutions of the turning machine to zero.

5. Diagnostics of NP hull displacements within bearing racks 5 and 6 (measurements at full power, minimum and after block shutdown) – determination of the causes of heating of bearing no. 5.

6. Ascension control.

II. Flow-through part

1. Inspection of injection and nozzle installations of NP parts with replacement of necessary elements.

2. Control of WP, SP paddocks and axial displacement of parts WP and SP.

3. Location and removal of steam leaks on the WP and SP body (possible to remove without having to open the bodies).

4. Disassembly and assembly of the NP1 flow part.

5. Repair / straightening of seals on the NP1 flow system: gland, interstage and overbandage.

6. Replacement of the sealing cord on the NP1 split.

7. Testing and repair of concentration welds in the capacitor throat and in the body of NP1 parts.

III. Turboset bearing, shaft turner, rotor centering

1. Overview of bearings 1, 2, 3, 4, 5, 6, 7, 8, 9:

- Disassembly/assembly of bearing rack covers,

- Dismounting and mounting of bearings,

- White metal adhesion tests for bearings 1, 2, 3, 4, 6, 7, 8, 9 (including thrust blocks)

- White metal adhesion test of new bearing no. 5

- Derivation of bearing clearances - side and upper,

- Fitting of bearings to the housing on the cushions and to the journal,

- Replacement of seals in the bearing pans and on the housing and clearance output,

- Setting the clamp and tension on the bearings,

- Control of thrust blocks on the working and non-working side, adjustment and positioning of the thrust bearing.

- Replacement of bearing No. 5. The new bearing shall be supplied by the customer.

- testing the welds of bearing racks No. 5 and 6 for joint cracks.

- Replacement of 3-4, 5-6 and 7-8 bearing rack pitch bolts with new ones made of higher quality steel according to the GE Power newsletter.

2. Crank measurements on rotor clutches: WP-SP, SP-NP1, NP1-NP2 and NP2 - Generator. Measurements and possible correction of tip runout and escape of the WP rotor pivot.

3. Alignment according to semi-couplings of rotors WP-SP, SP-NP1, NP1-NP2, NP2 - Generator.

4. Honing and fitting clutch bolts on clutches WP-SP, SP-NP1, NP1-NP2, NP2 - Generator. Replacement of necessary elements.

5. Inspection of the turning machine with the replacement of the necessary basic elements (bearings). Turning engine control. In case of damage, delivery of a new engine on the part of the Ordering Party.

6. Options

7. Delivery and execution of works related to the installation of new additional relative extension sensors WP, SP and NP x 2 (4 measurements in total):

• Execution of mounting brackets for WP, SP and NP relative elongation sensors, following the example of the new brackets used on block 10. The solution will be presented during the on-site visit.

• Installation of new holders in bearing racks in place of the currently installed holders for measuring relative extensions WP, SP and NP. Mounting new and old sensors on new brackets or separate brackets

• Execution of 5 bushings (G3/4" holes) in the housing of the bearing racks (for each measurement separately).

• Supply of sensors, transducers, field boxes, shielding hoses and signal cables (LiYCY-P 3x2x0,5).

Installation of boxes, laying of wiring from sensors to the cabinet of special measurements, connection of cables. Starting measurements and calibrating transducers.

The detailed scope of the order is specified in Part II of the SWZ.