Site characteristics Influencing the NPP
Observations for Kudankulam site
Plain topography-elevation+3m to 45m above MSL. Area measuring 1Km to 2Km available (3), (6)
Terrain suitable sufficient land available for future expansion
i) Nearest Broadgauge rail head
Kanyakumari(27Km), Valliyur (27Km)
Recommendation for ODC transport
1)All consignments/equipments with weight (30Ton: USSR-tutitorin by ship Tuticorin-site: by road or on barges by sea route
2) All consignments (30 ton USSR-site: by ship and barges. To be unloaded at jetty within the plant
ii)Nearest National Highway
NH7 at Kanyakumari 27Km, Valliyur 27Km,
iii) Nearest Seaport
iv) Nearest district road
Coastal road 4Km
Coarse aggregates available at Anjugrarer (4km). Sand available at Ratucenathjewari road (7km) Bricks available at Panagudi (27km)
More sources will be established at construction stage.
26KVA +2 KVA for township
Panagudi sub-station (27Km) – 110KV line exists. 110KV line from Kodyar power station is also being considered.
3.5 cu.sec (350 cu.m per hour
Initially limited supply to be tapped from ground water sources. Subsequently the demand will be met from Pechiparai dam
Quality of construction water is likely to be acceptable. Analysis of water will be carried out.
iv)Infrastructure facilities (e.g minor workshop etc)
Nagercoil (30km) and Tuticorin (100km)
Availability of Power Supply and Transmission Lines
50KVA per unit
Available from main state grid and Tuticorin Thermal Power Station Plant (630MW) 220KV line to be drawn from Tuticorin.
ii)Power evacuation scheme
Feasible as per preliminary study conducted by CEA. Detail study is in progress
Present grid capacity 12832 MWe. Nuclear 470MWe. Projected capacity in 1995 will be 27541MWe. Nuclear 1910 MWe
Availability of Water
6000 Cu sec
(on once-through basis)
Sea water cooling on once-through basis silt content:60-100 ppm Particle size75 microns.Temperature:26-29 oC
No constraint. Titanium tubes will be used. Study on biofouling and jelly fish that may affect the water supply will be taken at design stage. Model study will be taken up for intake and outfall structure(5)
ii)Fresh water for make-up and domestic use
10 cu sec
Assured by State Government. One pipeline from Pechiparai dam (at 65km) to be laid. pH:7. Dissolved solids:25mg/litre, Suspended solids:negligible, Turbidity:5mg/l (5)
Dam storage 4.45 TMC ft. Dead storage can account for 3 years drought (5)
400 acres of land identified near Chettikulam village about 7km from the site (3)
Site Characteristics Influencing the NPP
Observations for Kudankulam site
i)Foundation conditions depths of bed rock and type
Bed rock at 5-16m below ground. Biotite granite genesis with lenticular bodies of charnockites or quartzites
Maximum intensity of loading 6kg/sq.cm at RB
Dry strength : 650kg/sq.cm
Wet strength: 450 kg/sq.cm(5)
5-8 m below ground – gradient towards sea (5)
Erosion insignificant with respect to life of station. Nearest main plant structure from shore about 120m away from the sea base line
Layout for the main plant still under consideration figure of 120 tons estimate on the basis on 7 ton as the ground elevation at main plant building.
Maximum flood level considering tidal range wave run-up and maximum stage surge 5.9m above chart datam of 0.0 Exposed structures placed well above this level. (7)
Grade level around Reactor Building will be above 7m from MSL.
Revised report on MFL from CWPRS awaited. Grade elevation will be changed if necessary.
Not significant as per preliminary report of CWPRS
1m height of wave considered due to tsunami effect.
iv)Wind, storm, Cyclone
Maximum speed of storm:112km/hr. Storm surge accounted for in flooding. Exceedance probability 5% as per preliminary repsort from CWPRS.
Engineering capability to design for wind load exists.
Not applicable for rocky substrata
Not applicable for rocky substrata
No active fault within 5km of NPP. Engineering capability for stipulated earthquake acceleration should be possible
No active fault within 5km. Site is in seismic zoneII as per IS 1893; 1984. Nearest epicenter at Trivandrum (90km) earthquake in the region.
Magnitude 6 at Coimbatore (8 Feb, 1900) (300 km) Estimated peak horizontal acceleration for SSE is 0.15g and for OBE is 0.06g.
Engineering capability to design for such earthquake loads exists. Seismic evaluation report finalized after discussion with GSI and Soviet Specialists. Further ground checks have confirmed the assumptions regarding the nearest
PAGE – 13 MISSING
Use of Land
Within in the exclusion zone: 34% of area lies in sea. Remaining 650-750 ha of land (no forest), mostly private owned, is barren and unirrigated/poorly cultivable. Extremely limited agriculture. Annual yield: 20 tons of millet and 2 tons of cotton
Within 10km radius area: 60% of area lies in Sea. Remaining land is barren or used for agriculture. Annual yield:Paddy 14400 tons, millet 4300 tons, chillir 3000 tonnes, tobacco 380 tons, pulses 830 tons, cotton 250 tons, oil seeds 70 tons (4)
A lime stone quarry of about 70 acres falls within the sterilized zone. The lease for this area expires in 1994. Termination of the lease beyond the period has been requested.
Use of Water
Ground water, limited in supply is used for drinking andhas a gradient towards the sea. No salt pans within 5km. The degree of development of fisheries is as common as in a coastal belt. In the near by area, indinthakarai, Koothapuzh, Koothankuzhi and Perurranal are the fishing villages within 20km and annual fish produce of about 4000 tons in the area is reported. About 3900 fisherman in these villages are engaged infishing as per information furnished in 1982. At Chinneruttar near Kanyakumari, a fishing harbor is being developed. (4)
Disposal of Radioactive waste from the NPP
Low level solid waste to be buried within exclusion zone in leak-proof RCC vaults/trenches/tile holes. 160-180 m cu per year of cemented waste including spent absorption materials, 40m cu/yr of compacted waste and 5 m cu/yr of cemented ash will be generated from one reactor (5)
Borewells surrounding the solid waste burial area will be provided for monitoring migration of activities.
To be diluted to 2 x 10E-7 micro Ci/ml when discharged into the sea.
Most of the radioactivity in the liquid is removed in the Ion exchange resin and as evaporator concentrate. After above processing the liquid effluent from two units is estimated as 6000 m Cu/year with activity levels lesser or equal to 10E-9 Ci/l. This will be further diluted by condenser cooling water to meet the limits allowed by AERB
6000 cusecs of sea water available for dilution while sea water less than 1 cusec required to achieve the specified limits.
Stack height is 100m. Use of high efficiency (0.3 micron) particulate absolute filter will help to comply with authorized limits for particulate activity. The estimated gaseous discharges from two units as following.
Nuclides Avg daily
Noble gases– 2220
I-131 30 x 10E-4
Long life 0.012
Short life 0.26
It is understood that specific detailed information regarding waste and radioactive releases will be available along with PSAR for review
i)during normal operation
AERB prescribed limits
Based on releases vide para7, preliminary estimates indicate very low dose rates 11.24 mrem/yr to the individual at 1.6km exclusion radius. Both the water and air routes have been considered in the above estimates.
ii)During design basis accident conditions
10 rem for whole body, 50 rem for child thyroid at exclusion radius
For all design basis accidents adequate engineering safety features shall be provided to meet the specified requirements.
DBA calculations will be carried out at the design stage
Not significant. Intake and outfall will be well separated. Depth of sea water and large dilution due to sea will avoid thermal pollution
Model studies will be carried out at CWPRS Pune. The requirements of Tamilnadu pollution Control Board should be met
Storage and Transportation of Fresh and spent fuel
Space for storage of fresh fuel for 5 years plus one core charge will be provided. Each unit layout can store spent fuel of 5 reactor years in the spent fuel pool located inside the containment. Besides this space will be available to unload one core inventory.
50 ton of spent fuel will be discharged annually from the 2 reactors. After adequate cooling inside the pool, it will be shipped to Soviet Union by sea route in hermatically sealed casks. Special jetty provided within the plant area will be used for transfer of cask to the Soviet ships so that spent fuel remains within plant boundary at all stages during the process of shipment of irradiated.
Fuel Reprocessing facility
Reprocessing not planned at this site
i) Population within 2km radius exclusion zone
No resident population
ii)Population within 5km radius sterilized zone
Less than 26,000 population density (2/3 state average.
Total population:15,000, 3 villages in this area Kudankulam, Idinthakarai and Erukkanatharam
Tamilnadu legislation to control population growth beyond natural growth within the sterilized zone to be implemented.
iii)Population within 10km radius zone
No center >10,000
No population centre with more than 10,000 people. total population 40,842 (1961 census). Population density:130 persons/sq.km
iv)Population within 30km radius zone
No center >1,00,000
No population center with more than 1 lakh people. 11 centers have population more than 10,000 Nagercoil (at 30 km has a population of 1,71,641.
v) Population within 50km radius zone
33 population centers with population more than 10,000 (4)
Emergency Preparedness Considerations
3 routes exist for possible evacuation. Schools and other public buildings exist for adequate temporary shelter, nagercoil (30km), Tirunelveli (100km) and Tuticorin (100km) can providerehabilitation medical facilities and administrative support
Draft proposal on off-site emergency preparedness plans already submitted to AERB.
Additional Statutory requirements of the Central and State Government
Clearance for the following has been obtained:
Tamilnadu pollution control Board, Shore protection committee of Tamilnadu Government, State Committee on Environment, Minister of Environment and Forests (Government of India)
Stipulations made in the clearance documents should be adhered to.
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