ANNEXURE-A

SALIENT TECHNICAL FEATURES

(RLA Study, Stage-II)

PLANT OVERVIEW:

NTPC Talcher-Kaniha (TSTPS) plant is located in Kaniha block under Talcher sub-division of Angul district in the state of Orissa.

Nearest Town: Talcher 26 KMs

Nearest Railway Station: Talcher 29 KMs

Nearest Airport: Bhubaneswar 180 KMs

INSTALLED CAPACITY

STAGE - I - 2 Units each 500 MW - Total 1000 MW

STAGE- II - 4 Units each 500 MW - Total 2000 MW

EQUIPMENTS INVOLVED:

Stage-II Boiler:- 4 X 500 MW, Circulation type two pass boiler with Drum.

Maximum Height of Boiler:- 85 Mtr. Make:- BHEL,

Three banks of Economiser, Two banks of LTSH are arranged Horizontally and Divisional Panel, Platen Super Heater, Reheater are arranged vertically

In addition to main Boiler following equipments are included per unit:-

88 Nos of Wall Blower and 34 Nos of LRSB per boiler. Boiler is equipped with 16 nos Spring Loaded safety valves, 8 Electromatic Relief valves .All Boiler valves except the control valves/Block valves are of BHEL make and mostly are under size 150 Nb. Boiler Burner is having 40 coal nozzles & 20 Oil guns. Piping hangers are of constant load, variable load and rigid strut type hangers total approximately 300 nos at different location and elevations.

The details of power cycle piping are as follows.

a) Main steam pipes (left and right) and its common pipe upto turbine inlet.

b) Cold reheat pipes from turbine to boiler left side and right side upto Reheater inlet header.

c) Reheater Inlet to Reheater Outlet Header

d) Reheater outlet header (one pipe on left side and one pipe on right side) upto IP turbine inlet.

e) Piping from WW all headers to Boiler drum.

f) Piping from Boiler Drum to LTSH Inlet header

g) Piping from LTSH outlet header to Divisional panel headers

h) Divisional Panel headers to Platen Superheater inlet header

i) Platen Superheater Inlet header to Platen superheater outlet Header

j) Platen Superheater Outlet header to MS piping upto HP Turbine Inlet (left and right twin pipes)

k) Feed water piping From BFP to Economiser inlet header

l) Piping from Economiser outlet header to Boiler Drum

m) Boiler Drum to downcomers

n) Bottom ring headers.

Brief Works involved in RLA study will be as follows for various Boiler parts and piping

A. Pre Outage Planning and Study

B. Hot walk down Survey

C. Cold Walk down Survey

D. Visual Examination

E. Dimensional Measurements (DIM)

F. Videoscopic Inspection

G. Non-Destructive Tests

H. Destructive Tests

For details the scope and terms and conditions should be referred.