Foreign Companies hands in banning Ilmenite Export

Ilmenite Export was banned by some State and Central Government officials in the name of controlling illegal mining.  Very big companies of developed countries are involved in this Ban. Those who could not able to compete with Indian Companies in terms of quality and supply schedule , they use this illegal tactics to control Indian Export.  Already some people made complaints to the government to enquire about this.  But now the government is run by officials and upper cast people.  They don’t know about the pain of the employees. Thank to the media who bring the impact to light. One of the News published is given below.

Copy of mail send to Ecologist for one adverse news published about Tamilnadu Beach Mineral Mining

From: Pauldurai Perumal <>
Date: Fri, Feb 9, 2018 at 10:41 AM
Subject: Objection to your Article on 08.2.18 as “They stole the beach’ – the major mafia that almost nobody wants to talk about”


            This has reference to your article on 08.02.2018 as “They stole the beach’ – the major mafia that almost nobody wants to talk about”

              In your article you have referred lot of beaches. You mentioned about the beach mineral mining in Tamilnadu. One of the person mentioned by you is Mr. Ravi Shankar, who is non-other, but the husband of paid news reporter Mrs. Sandhya Ravi Shankar.  We send our objection relating to the news of beach mineral mining in Tamilnadu.

In fact, Sandhya Ravishankar is gang member who are threatening industrialist in a modern way and demand money. They all are criminals.  Retired IAS officers and IPS officers also in the part of gang.  They will collect money and share among them. A small portion is spend to the fellow reporters and some digital shell media’s. Some printed media’s who did not receive any advertisement from Mr.S.Vaikundarajan group companies also joined with them. The officers who are in service also by misusing the power do some wrong. You can see the video available in   which will establish that, one district Collector has done wrong as per the advice of the Retd. IAS officer who is also a gang member. You can also find out the documents and complaint petition against the District Collector on the above said website.

A sizeable gang joined hands and is continuously harassing VV Mineral and its owner Mr. Vaikundarajan. This gang operates FOR MONEY  comprises of VVM competitor Daya Devadas, an ILLEGAL MINOR, and retired government officials like Ramanujam, IPS, Sundaram, IAS, Prof.Victor Rajamanickam, Danuskodi Adithan, EX.Central Minister and also some officers in power. Sandhya Ravisankar joined this gang through her close friend Radhika, daughter of Sundaram. The above combo of rivals of VV Mineral with paid news writers Sandhya Ravishankar and more freelancers, brings up false allegations against VV Mineral. The ultimate motive is to spoil the fame of Mr. Vaikundarajan and to destroy his business and to prejudice the judiciary as well as Government against VV Mineral.  Sandhya’s Husband company delta4cast  demand some contract in News-7 Tamil which belongs to VV Mineral Group company. Since Ravishankar demand was not complied, both husband and wife spread false stories in various ways. This personal enmity also one of the reason.

Sandhya Ravisankar has been continuously placing false allegations against VV Mineral, without any proof. Already Sandhya published a false news in the Economic Times, when we send reply they themselves accept that, the facts are not verified and published clarification available in

In the Mafia Gang, some Retired IAS, IPS officers also members including Mr.Ramanujam, Retd. DGP. Ramanujam and Sandhya Ravishankar will regularly meet in a coffee shop namely ANOKHI CAFÉ opposite to Park Plaza Hotel in the smoking zone and they prepare the criminal plan. When VV Mineral take steps to file criminal case, to avoid the same, Sandhya has filed a civil case against the company which is also pending.

Lot of documents, evidences and reply to the wild allegations made by Sandhya and other shell medias for money all are available in the following links.

You can find out the same.

All the reported matters on “beach Mineral mining in Tamilnadu” in your article are absolutely farcical and bereft of truth in them.  Due to business rivalry and   personal jealousy and animosity,  the former Union Minister Thiru. Dhanushkodi Adithan associated company’s (M/s.Indian Garnet Sand Company) one of the partners viz., Thiru Dhayadevadoss in collusion with the said Union Minister’s political influence  has been in the habit of spreading false  reports through all types of media.  All these reports are totally false and baseless.  The 100% verification reports of the officials of Central and State Governments in the past  will testify to the fact that the reports being circulated through the media are farce and nothing but false.  In so far as beach sand mineral concessions are concerned, clearances from as many as 10 various departments of both Central and State Governments have to be necessarily obtained as per the mandates of the “statutory rules” without which no mining leases for beach mineral sand can be obtained and operated.

           All  the allegations levelled against M/s.V.V. Mineral were all examined in detail  by  various authorities then and there and all the report copies were obtained under RTI and posted in our website .

           In fact, in Tamilnadu except Govt., of India Company, Indian Rare Earths Limited (IREL) , all the private beach mineral mining lessees has obtained Coastal Regulation Zone (CRZ) Clearance from Govt., of India and other Govt., agencies.

            For your information during 2004, Tsunami in Tamilnadu, except private mining lease area, Govt., company mining lease areas are affected. Particularly more than 400 people died in a Govt., Company mining lease area village Colachel of Kanyakumari District, as, their operation is without getting CRZ clearance.

            Thanks to National Green Tribunal (NGT), which stayed the operations of all the beach mineral mining lessees without CRZ Clearance.

            In your article, you have mentioned that lot of quantity have been illegally mined and transported. In fact there is no need for this. All over Tamilnadu total 61 beach mineral mining leases granted to private companies. Out of which five mining lease belongs to Mr. Dhanuskodi Adithan Ex.Congress Central Minister Group were determined by Government for illegal mining of 3.9 million M.Tons. You can see the same from

            You have mentioned that, export is made after the stoppage of mining operation. Is there any restriction to export the existing royalty suffered minerals available with the lessees and reflected in the stock register prior to the stoppage?

            In India already satellite Remote Sensing facilities are established by Govt., of India, Ministry of Mines. It will find out the illegal mining and send report to the State Government. So there is no possibility for illegal mining.

            Therefore, your report against  beach sand mining in Tamilnadu may be collected from some Indian Medias who are dancing according to our competitors tune. A section of Medias are here to write against Tamilnadu private mining lessees for which they have get remuneration. If you go through our association website   you can find out lot of information about the motive and nexus behind this false news spread against our members.

 One of our member VV Mineral have filed two criminal cases against Sandhya Ravi Shankar for misreporting the facts, and it is still pending.  She also filed one civil case against VV Mineral, which is also still pending in the City civil court, Chennai.

Everybody knows that the work allotted to Sandhya Ravishankar is to make negative and false stories against Tamilnadu beach mineral industries particularly VV group companies and thereby prejudice the judiciary. Whenever there is a hearing in the High court,  she will aptly publish a false story just to prejudice the judges and create undue influence on the judges. This is what Sandhya are paid for and that is exactly what she has done so far.

Her husband also creating the fake stories and hand over the same to Malayalam media which are close to her husband. We believe that they get remuneration for this stories from  overseas competitors also.

Since the pending case will be listed for hearing in the  High Court very near, she and her husband and other gang members make this para reflect on your article.

            So Please go through the above said links and find out the real fact and motive about this people who are writing for money and  publish our objection in your website.


N.Pauldurai @ Perumal


கதிர்வீச்சு அனைவரும் தெரிய வேண்டிய உண்மைகள்

radiation – our permanent friend broucher

தவறான உத்தரவு பிறப்பித்த முந்தைய மாவட்ட ஆட்சியரை தண்டிக்காமல் பாதிக்கப்பட்ட நிர்வாகத்தை தண்டிப்பது என்ன வகையில் நியாயம்!!!

No power to District Collector under MCDR – Information Commission confirmed

No power to Collector under MCDR – Information Commission conirmed

No information available regarding powers delegated to District Collector to take action about mining plans approved by AMD

No powers have been delegated to district Collector or the District Level Committee or the Deputy Director of Geology and Mining of the District to initiate action for the violations of mining plans approved by AMD under provisions of Mineral Conservation and Development Rules, 1988 or MCDR, 2017 with respect to Garnet, Ilmenite, Rutile, Zircon, Silimanite and Leucoxene minerals – Such informations are not available with AMD.  They replied vide their letter dated 13.10.2017. This for the members kind information.

No power delegation to collector – AMD lr

Our objection mail to New Indian Express Article “Greed for atomic minerals to leave Tamilnadu in peril”

From: Pauldurai Perumal <>
Date: Sat, Oct 14, 2017 at 8:26 AM
Subject: Objection to your article “Greed for atomic minerals to leave Tamilnadu in peril”



The Editor,

New Indian Express,




This has the reference to the article in your paper under the heading “Greed for atomic minerals to leave Tamilnadu in peril” is damaging the entire beach minerals industry in India and Tamilnadu in particular without any understanding of the issues involved. The article links the MOEF notification to totally unconnected report of the amicus curie appointed by the court  is subjudice.


We are bringing to your attention that the use of the  word “horrific” amendment mentioned in the article shows that the article written without any understanding of the reality and the meaning of the notification. Mining of atomic minerals/ rare minerals are already permitted activity in CRZ, the only requirement was that clearance needs to be obtained.


The article mentions that Tamilnadu has the highest concentration of the monazite mineral which is not really true. The monazite content is very high only in Manavalakurichi,   west coast of Kanyakumari district and not throughout Tamilnadu. The said Manavalakurichi area is leased to IRE Ltd, a Govt., company. The East coast area were leases granted to private companies content monazite percentage less than 0.5%. As per the Atomic Minerals Concession rules 2016, wherever the monazite content in the total heavy mineral (THM) is more than 0.75%, only the government entities are allowed to mine and produce the minerals and no private entity is allowed to mine such deposits.


Another  apprehension is that these resources may land up in foreign soil. India has almost one third of the world’s reserves of ilmenite mineral, but accounts for a mere 4% of global production. There is huge growth potential for BSM in India, but until now it has  not received the  focused attention of the Governments to develop this industry. The strategic importance of these minerals and the possible downstream industries to produce value added products from Ilmenite,  zircon and monazite remains an untapped opportunity till now. If these can be achieved will give  a boost  to the manufacturing sector and economic development of the country with significant revenues. Monazite contains 0.35% of uranium, 8-10% of thorium and 65% rare earths. Rare Earth is today’s sought after material and China is dominating the world with a 95% share. Just now only Indian Govt., get the technology from Japan for cracking monazite. Accordingly IRE Ltd is establishing the same in Orissa State. The statement that “Tamilnadu has already been plundered violating CRZ norms “ is not at all true. It is worth mentioning that only Indian Rare Earths Limited (IREL) is mining on the beach and as a public sector, without getting CRZ clearance. All the private mining lessees have obtained  CRZ clearances and comply the terms and conditions. Hence it is not possible to plunder due to strict guidelines being followed. For your information, during Tsunami more than 400 persons died in IRE Ltd mining lease area surrounding villages. Whereas there is no causality near the private mining lease areas, since they follow the CRZ norms strictly.


Another point mentioned is that maximum erosion occurred at Sippikulam, Kalaignanapuram and Periasamypuram zones. So far no beach sand mining activity is going on these areas. This itself makes it clear that the erosion is not due to beach sand mineral mining and there is no evidence so far to prove that beach sand minerals mining is causing erosion. You know very well that beach erosion is a global issue due to Global warming. You yourself has published number of articles about this. The scientist you mentioned Dr.Chandrasekar is close friend Dhayadevadas, he has created forgery documents to support Dhayadevadas and Govt., also ordered enquiry about him. We are ready to furnish the above details to you. For your information there is no sea erosion in any of the private beach mineral mining lease areas, since they follow the CRZ conditions strictly.


It is mentioned “ that no comprehensive study has been brought to public forum about the health effects of these radiations. “The incidences of cancer has been rising over the decades and most victims from Manavalakuruchi and Midalam, approach the Regional Cancer Centre in Thiruvananthapuram or the International Cancer Centre , by CSI Medical Mission at Neyyoor. “These cases are however are not mapped back to radioactivity,” he said claiming that the incidence of the disease is relatively lower the farther one lives from atomic mining areas. This statement shows the total ignorance of the individual who had made it. If the above statement is true, why peoples are affected by cancer in other areas. When the employees who are working full time with this minerals  are not affected, how the general public will affected? The beach sand minerals mining and separation normally removes the radioactive monazite from the background reducing the background radiation which normally affects public. The background radiation levels is normally reduced by a factor of five to ten where the mining is carried out and these had been already studied and recorded by agencies like AERB and BARC.


If the minerals occurring on the coast if not mined when accretion happens, is normally carried to the neighboring  countries due to the tidal waves and is a loss to the nation.


We request that these facts may also be brought to the attention of the public as well as the concerned departments.

Yours truly



Beach Mineral Producers Assocition

Radioactivity in Nature

Radioactivity in Nature
Our world is radioactive and has been since it was created. Over 60 radionuclides (radioactive elements) can be found in nature, and they can be placed in three general categories:

  1. Primordial – from before the creation of the Earth
  2. Cosmogenic – formed as a result of cosmic ray interactions
  3. Human produced – enhanced or formed due to human actions (minor amounts compared to natural)

Radionuclides are found naturally in air, water and soil. They are even found in us, being that we are products of our environment. Every day, we ingest and inhale radionuclides in our air and food and the water. Natural radioactivity is common in the rocks and soil that makes up our planet, in water and oceans, and in our building materials and homes. There is nowhere on Earth that you can not find Natural Radioactivity.

Radioactive elements are often called radioactive isotopes or radionuclides or just nuclides. There are over 1,500 different radioactive nuclides. Often, radionuclides are symbolized based on the element and on the atomic weight, as in the case of radioactive hydrogen or tritium with an atomic weight of 3 is shown as H-3 or 3H. As another example, Uranium with the atomic weight of 235 would be shortened to U-235 or 235U.

Much of the information and many of tables found on this page are adapted from information found in Environmental Radioactivity from Natural, Industrial and Military Sources by Merrill Eisenbud and Tom Gesell, Academic Press, Inc. 4th Edition. Some tables are adapted from the National Council on Radiation Protection reports 94 and 95. References are listed at the bottom of this page. Several of the tables below were produced by calculations based on available data.

Note: Many of the units used in science are broken down into smaller units or expressed as multiples, using standard metric prefixes. As examples, a kilobecquerel (kBq) in 1000 becquerels, a millirad (mrad) is 10-3 rad, a microrem (µrem) is 10-6 rem, a nanogram is 10-9 grams, and a picocurie is a 10-12 curies. These are examples of units used frequently throughout this short paper. To find definitions of terms or units you’re not familiar with, look on our glossary page.

Common abbreviations used on this page are: m – meter, m3 – cubic meter, g – gram, kg – kilogram, Bq – becquerel, Sv – sievert, Gy – gray, Ci – curie, ppm – parts per million, yr – year, hr – hour, L – liter

In the United States, the annual estimated average effective dose equivalent from radiation is 360 mrem per adult. This is broken down as:

Annual estimated average effective dose equivalent received by a member of the population of the United States.
Source Average annual effective dose equivalent
(µSv) (mrem)
Inhaled (Radon and Decay Products) 2000 200
Other Internally Deposited Radionuclides 390 39
Terrestrial Radiation 280 28
Cosmic Radiation 270 27
Cosmogenic Radioactivity 10 1
Rounded total from natural source 3000 300
Rounded total from artificial Sources 600 60
Total 3600 360

Shown in the table above, 82% of the total average annual effective dose is from natural sources of radiation, and of that, most is from radon. Of the other 18%, the majority is from medical diagnosis and treatments, with <1% from nuclear power and fallout.

This can perhaps be more easily seen with a graph (6K)

You can also calculate your own background radiation from this EPA website.

See Radiation and Us for more info on average U.S. doses of radiation.

United States Geological Survey map of estimated total gamma exposure for the U.S. (78 k)

Primordial radionuclides

Primordial radionuclides are left over from when the world and the universe were created. They are typically long lived, with half-lives often on the order of hundreds of millions of years. Radionuclides that exist for more than 30 half-lives are not measurable. The progeny or decay products of the long lived radionuclides are also in this heading. Here is some basic information on some common primordial radionuclides:

Primordial nuclides
Nuclide Symbol Half-life Natural Activity
Uranium 235 235U 7.04 x 108 yr 0.72% of all natural uranium
Uranium 238 238U 4.47 x 109 yr 99.2745% of all natural uranium; 0.5 to 4.7 ppm total uranium in the common rock types
Thorium 232 232Th 1.41 x 1010 yr 1.6 to 20 ppm in the common rock types with a crustal average of 10.7 ppm
Radium 226 226Ra 1.60 x 103 yr 0.42 pCi/g (16 Bq/kg) in limestone and 1.3 pCi/g (48 Bq/kg) in igneous rock
Radon 222 222Rn 3.82 days Noble Gas; annual average air concentrations range in the US from 0.016 pCi/L (0.6 Bq/m3) to 0.75 pCi/L (28 Bq/m3)
Potassium 40 40K 1.28 x 109 yr soil – 1-30 pCi/g (0.037-1.1 Bq/g)

Some nuclides like 232Th have several members of its decay chain. You can roughly follow the chain starting with 232Th

232Th –> 228Ra –> 228Ac –> 228Th –> 224Ra –>
220Rn –> 216Po –> 212Pb –> 212Bi –> 212Po –> 208Pb (stable)

You can see how the decay process works with this interesting Decay In Action website

Some other primordial radionuclides are 50V, 87Rb, 113Cd, 115In, 123Te, 138La, 142Ce, 144Nd, 147Sm, 152Gd, 174Hf, 176Lu, 187Re, 190Pt, 192Pt, 209Bi.

United States Geological Survey Digital maps of estimated potassium, equivalent uranium-238, equivalent thorium-232 concentrations for the conterminous U.S.


Cosmic radiation permeates all of space, the source being primarily outside of our solar system. The radiation is in many forms, from high speed heavy particles to high energy photons and muons. The upper atmosphere interacts with many of the cosmic radiations, and produces radioactive nuclides. They can have long half-lives, but the majority have shorter half-lives than the primordial nuclides. Here is a table with some common cosmogenic nuclides:

Cosmogenic Nuclides
Nuclide Symbol Half-life Source Natural Activity
Carbon 14 14C 5730 yr Cosmic-ray interactions, 14N(n,p)14C 6 pCi/g (0.22 Bq/g) in organic material
Hydrogen 3
3H 12.3 yr Cosmic-ray interactions with N and O, spallation from cosmic-rays, 6Li(n, alpha)3H 0.032 pCi/kg
(1.2 x 10-3 Bq/kg)
Beryllium 7 7Be 53.28 days Cosmic-ray interactions with N and O 0.27 pCi/kg (0.01 Bq/kg)

Some other cosmogenic radionuclides are 10Be, 26Al, 36Cl, 80Kr, 14C, 32Si, 39Ar, 22Na, 35S, 37Ar, 33P, 32P, 38Mg, 24Na, 38S, 31Si, 18F, 39Cl, 38Cl, 34mCl.

Human Produced

Humans have used radioactivity for one hundred years, and through its use, added to the natural inventories. The amounts are small compared to the natural amounts discussed above, and due to the shorter half-lives of many of the nuclides, have seen a marked decrease since the halting of above ground testing of nuclear weapons. Here are a few human produced or enhanced nuclides:

Human Produced Nuclides
Nuclide Symbol Half-life Source
Tritium 3H 12.3 yr Produced from weapons testing and fission reactors; reprocessing facilities, nuclear weapons manufacturing
Iodine 131 131I 8.04 days Fission product produced from weapons testing and fission reactors, used in medical treatment of thyroid problems
Iodine 129 129I 1.57 x 107 yr Fission product produced from weapons testing and fission reactors
Cesium 137 137Cs 30.17 yr Fission product produced from weapons testing and fission reactors
Strontium 90 90Sr 28.78 yr Fission product produced from weapons testing and fission reactors
Technetium 99 99Tc 2.11 x 105 yr Decay product of 99Mo, used in medical diagnosis
Plutonium 239 239Pu 2.41 x 104 yr Produced by neutron bombardment of 238U
238U + n–> 239U–> 239Np +ß–> 239Pu+ß)

Other Interesting Aspects of Natural Radioactivity

Natural Radioactivity in soil

How much natural radioactivity is found in a volume of soil that is 1 square mile, by 1 foot deep? The following table is calculated for this volume (total volume is 7.894 x 105 m3) and the listed activities. It should be noted that activity levels vary greatly depending on soil type, mineral make-up and density (~1.58 g/cm3 used in this calculation). This table represents calculations using typical numbers.

Natural Radioactivity by the Square Mile, 1 Foot Deep
Nuclide Activity used
in calculation
Mass of Nuclide Activity found in the volume of soil
Uranium 0.7 pCi/g (25 Bq/kg) 2,200 kg 0.8 curies (31 GBq)
Thorium 1.1 pCi/g (40 Bq/kg) 12,000 kg 1.4 curies (52 GBq)
Potassium 40 11 pCi/g (400 Bq/kg) 2000 kg 13 curies (500 GBq)
Radium 1.3 pCi/g (48 Bq/kg) 1.7 g 1.7 curies (63 GBq)
Radon 0.17 pCi/g (10 kBq/m3) soil 11 µg 0.2 curies (7.4 GBq)
Total: >17 curies (>653 GBq)

Natural Radioactivity in the Ocean

How much natural radioactivity is found in the world’s oceans?

All water on the Earth, including seawater, has some radionuclides in it. In the following table, the oceans’ volumes were calculated from the 1990 World Almanac:

  • Pacific = 6.549 x 1017 m3
  • Atlantic = 3.095 x 1017 m3
  • Total = 1.3 x 1018 m3

The activities used in the table below are from 1971 Radioactivity in the Marine Environment, National Academy of Sciences:

Natural Radioactivity by the Ocean
Nuclide Activity used
in calculation
Activity in Ocean
Pacific Atlantic All Oceans
Uranium 0.9 pCi/L
(33 mBq/L)
6 x 108 Ci
(22 EBq)
3 x 108 Ci
(11 EBq)
1.1 x 109 Ci
(41 EBq)
Potassium 40 300 pCi/L
(11 Bq/L)
2 x 1011 Ci
(7400 EBq)
9 x 1010 Ci
(3300 EBq)
3.8 x 1011 Ci
(14000 EBq)
Tritium 0.016 pCi/L
(0.6 mBq/L)
1 x 107 Ci
(370 PBq)
5 x 106 Ci
(190 PBq)
2 x 107 Ci
(740 PBq)
Carbon 14 0.135 pCi/L
(5 mBq/L)
8 x 107 Ci
(3 EBq)
4 x 107 Ci
(1.5 EBq)
1.8 x 108 Ci
(6.7 EBq)
Rubidium 87 28 pCi/L
(1.1 Bq/L)
1.9 x 1010 Ci
(700 EBq)
9 x 109 Ci
(330 EBq)
3.6 x 1010 Ci
(1300 EBq)


Every food has some small amount of radioactivity in it. The common radionuclides in food are potassium 40 (40K), radium 226 (226Ra) and uranium 238 (238U) and the associated progeny. Here is a table of some of the common foods and their levels of 40K and 226Ra.

Natural Radioactivity in Food
Food 40K
Banana 3,520 1
Brazil Nuts 5,600 1,000-7,000
Carrot 3,400 0.6-2
White Potatoes 3,400 1-2.5
Beer 390
Red Meat 3,000 0.5
Lima Bean
4,640 2-5
Drinking water 0-0.17
Ref: Handbook of Radiation Measurement and Protection, Brodsky, A. CRC Press 1978 and Environmental Radioactivity from Natural, Industrial and Military Sources, Eisenbud, M and Gesell T. Academic Press, Inc. 1997.

Human body

You are made up of chemicals, and it should be of no surprise that some of them are radionuclides, many of which you ingest daily in your water and food. Here are the estimated concentrations of radionuclides calculated for a 70,000 gram adult based ICRP 30 data:

Natural Radioactivity in your body
Nuclide Total Mass of Nuclide
Found in the Body
Total Activity of Nuclide
Found in the Body
Daily Intake of Nuclides
Uranium 90 µg 30 pCi (1.1 Bq) 1.9 µg
Thorium 30 µg 3 pCi (0.11 Bq) 3 µg
Potassium 40 17 mg 120 nCi (4.4 kBq) 0.39 mg
Radium 31 pg 30 pCi (1.1 Bq) 2.3 pg
Carbon 14 22 ng 0.1 µCi (3.7 kBq) 1.8 ng
Tritium 0.06 pg 0.6 nCi (23 Bq) 0.003 pg
Polonium 0.2 pg 1 nCi (37 Bq) ~0.6 fg

It would be reasonable to assume that all of the radionuclides found in your environment would be in you in some small amounts. The average annual dose equivalent from the internal deposited radionuclides is given in the table at the top of this page.

Natural Radioactivity in Building Materials

As mentioned before, building materials have some radioactivity in them. Listed below are a few of common building materials and their estimated levels of uranium, thorium and potassium.

Estimates of concentrations of uranium, thorium and potassium in building materials (NCRP 94, 1987, except where noted)
Material Uranium Thorium Potassium
ppm mBq/g (pCi/g) ppm mBq/g (pCi/g) ppm mBq/g (pCi/g)
Granite 4.7 63 (1.7) 2 8 (0.22) 4.0 1184 (32)
Sandstone 0.45 6 (0.2) 1.7 7 (0.19) 1.4 414 (11.2)
Cement 3.4 46 (1.2) 5.1 21 (0.57) 0.8 237 (6.4)
Limestone concrete 2.3 31 (0.8) 2.1 8.5 (0.23) 0.3 89 (2.4)
Sandstone concrete 0.8 11 (0.3) 2.1 8.5 (0.23) 1.3 385 (10.4)
Dry wallboard 1.0 14 (0.4) 3 12 (0.32) 0.3 89 (2.4)
By-product gypsum 13.7 186 (5.0) 16.1 66 (1.78) 0.02 5.9 (0.2)
Natural gypsum 1.1 15 (0.4) 1.8 7.4 (0.2) 0.5 148 (4)
Wood 11.3 3330 (90)
Clay Brick 8.2 111 (3) 10.8 44 (1.2) 2.3 666 (18)

Oklo Natural Reactor

Adapted from August 1976 Scientific American article on Oklo by Cowan.

In 1972, natural nuclear reactor was found in a Western Africa in the Republic of Gabon, at Oklo. While the reactor was critical, approximately 1.7 billion years ago, it released 15,000 megawatt-years of energy by consuming six tons of uranium. It operated over several hundred thousand years at low power.

It was discovered by a French mining geologist while assaying samples for the Oklo Uranium mine. Today, the fissionable Uranium 235 has an natural abundance of 0.7202%, but the scientist noticed some samples from Oklo to be 0.7171%. While this difference was small, it started the scientists to ponder and take a look closer at the Oklo site. Later, samples were found more depleted, down to 0.44%. This difference could only be explained if some of the fuel, the 235U, had been used up in a fission reaction. Upon further investigation, abnormally high amounts of fission products were found in six separate reactor zones.

Like present day power reactors, a natural reactor would require several special condition, namely fuel, a moderator, a reflector, lack of neutron absorbing poisons and some way to remove the heat generated. At Oklo, the area was naturally loaded with uranium by water transport and deposition. The concentration of Uranium 235 is artificially enriched for most modern reactors, but at the time of the Oklo reactor it was naturally enriched with an abundance of approximately 3%. This is because when the world was formed, there was a certain amount of 235U, and it has been decaying ever since. So, because 235U has a shorter half-life than 238U, so one billion years ago ,235U made up a larger percentage of the natural uranium. The 3% 235U was enough for a sustained nuclear reaction. Oklo site was saturated with groundwater, which served as a moderator, reflector and cooling for the fission reaction. There was a lack of poisons before the reaction began, and fission products like xenon and neodymium serve as neutron absorbing poisons, absorbing neutrons, acting to limit the power.

To confirm that there was a natural fission reactor, the scientists started looking for other evidence. First they wanted to look for some element that might have been produced in a reactor, but would have little natural occurrence elsewhere. They looked at several, but neodymium gave strong indications of the reactor had indeed operated. Neodymium has seven stable isotopes, but only six are fission products. The abundance of the neodymium at Oklo sites was compared to other areas and to the neodymium found in modern reactors. Once the samples were compared, the abundance of neodymium was found to be almost exactly that found in present day reactors. All in all, the fission products studied matched what would have been the result of a sustained nuclear reaction. There is even evidence that the reactor bread its own fuel, bombarding the 238U with neutrons, making the easily fissionable 239Pu.

Some other interesting information has come out of this, over half of the thirty fission products found there were confined to the reactor zones, with all plutonium immobilized. The strontium was mainly confined to the local zones, with some release to environment estimated from krypton 85 and cesium 137

One of the greatest works of the 20th century was the building of the first atomic pile (nuclear reactor) in Chicago in 1941 by Enrico Fermi. It took some of the brightest minds in modern physics and great engineering efforts to duplicate what nature did two billion years earlier.

Editors note: Despite some wild baseless claims, there is no evidence or even credible theory that the Oklo natural reactor was anything but a natural phenomenon. The 6 reactor zones are spread over a huge area that was a uranium mine during the time it was first discovered. The reactor zones were the result of natural physical processes, active for thousands of years.

For more information on the Oklo Reactor, try:

  • The Natural Nuclear Reactor at Oklo: A Comparison with Modren Nuclear Reactors (WWW paper by Andrew Karam – 1998, updated 2005)
  • Scientific American: The Workings of an Ancient Nuclear Reactor [ GEOSCIENCE ]
  • Oklo natural reactor (Western Australian Isotope Science Research Centre)
  • The a-recoil effects of uranium in the Oklo reactor. Nature 312:535-6 Dec 6 ’84
  • Gabon’s natural reactors: nature shows how to contain radioactive waste. Nuclear-Engineering-International. vol.39, no.475; Feb. 1994; p.30-1
  • Organic matter and containment of uranium and fissiogenic isotopes at the Oklo natural reactors. Nature. vol.354, no.6353; 12 Dec. 1991; p.472-5
  • Estimation of burnup in the Oklo natural nuclear reactor from ruthenium isotopic composition. Journal of Radioanalytical and Nuclear Chemistry, Letters. vol.155, no.2; 16 Sept. 1991; p.107-13
  • The origin of the chemical elements and the Oklo phenomenon. Kuroda, P. K. Berlin ; New York : Springer-Verlag, 1982.

High Background Radiation Areas

Background radiation levels are from a combination of terrestrial (from the 40K, 232Th, 226Ra, etc.) and cosmic radiation (photons, muons, etc.). The level is fairly constant over the world, being 8-15 µrad/hr. The US EPA has an on-line calculator to let you calculate your own annual background dose.

Around the world though, there are some areas with sizable populations that have high background radiation levels. The highest are found primarily in Brazil, India and China. The higher radiation levels are due to high concentrations of radioactive minerals in soil. One such mineral, Monazite, is a highly insoluble rare earth mineral that occurs in beach sand together with the mineral ilmenite, which gives the sands a characteristic color. The principal radionuclides in monazite are from the 232Th series, but there is also some uranium its progeny, 226Ra.

In Brazil, the monazite sand deposits are found along certain beaches. The external radiation levels on these black sands range up to 5 mrad/hr (50 µGy/hr), which is almost 400 times normal background in the US. Some of the major streets of the surrounding cites have radiation levels as high as 0.13 mrad/hr (1.3 µGy/hr), which is more than 10 times the normal background. Another high background area in Brazil is the result of large rare earth ore deposits that form a hill that rises about 250 meters above the surrounding area. An ore body near the top of the hill is very near the surface, and contains an estimated 30,000 tons of thorium and 100,000 tons of rare earth elements. The radiation levels near the top of the hill are 1 to 2 mrad/hr (0.01 to 0.02 mGy/hr) over an area of about 30,000 m2. The plants found there have absorbed so much 228Ra, that they can will produce a self “x-ray” if placed on a sheet of photographic paper (an autoradiographed).

On the Southwest coast of India, the monazite deposits are larger than those in Brazil. The dose from external radiation is, on average, similar to the doses reported in Brazil, 500-600 mrad/yr (5 – 6 mGy/yr), but individual doses up to 3260 mrad/yr (32.6 mGy/yr) have been reported.

An area in China, has does rates that is about 300-400 mrad/yr (3-4 mGy/yr). This is also from monazite that contains thorium, uranium and radium.

From BEIR V, National Research Council report on Health Effects of Low Levels of Ionizing Radiation:

In areas of high natural background radiation, an increased frequency of chromosome aberrations has been noted repeatedly. The increases are consistent with those seen in radiation workers and in persons exposed at high dose levels, although the magnitudes of the increases are somewhat higher than predicted. No increase in the frequency of cancer documented in populations residing in areas of high natural background radiation.

Cosmic Radiation

Cosmic radiation as discussed above, upon interaction with our atmosphere produces cosmogenic radionuclides. It also is responsible for a whole body doses.

Cosmic radiation is really divided into two types, primary and secondary. Primary cosmic radiation is made up of extremely high energy particles (up to 1018 eV), and are mostly protons, with some larger particles. A large percentage of it comes from outside of our solar system and is found throughout space. Some of the primary cosmic radiation is from our sun, produced during solar flares.

Little of the primary cosmic radiation penetrates to the Earth’s surface, the vast majority of it interacts with the atmosphere. When it does interact, it produces the secondary cosmic radiation, or what we actually see here on Earth. These reactions produce other lower energy radiations in the form of photons, electrons, neutrons and muons that make it to the surface.

The atmosphere and the Earth’s magnetic fields also act as shields against cosmic radiation, reducing the amount that reaches the Earth’s surface. With that in mind, it is easy to see that the annual dose you get from cosmic radiation depends on what altitude you are at. From cosmic radiation the U.S., the average person will receive a dose of 27 mrem per year and this roughly doubles every 6,000 foot increase in elevation.

Typical Cosmic Radiation Dose rates:

4 µR/hr in the Northeastern US
20 µR/hr at 15,000 feet
300 µR/hr at 55,000 feet

There is only about a 10% decrease at sea level in cosmic radiation rates when going from pole to the equator, but at 55,000 feet the decrease is 75%. This is on account of the effect of the earth’s and the Sun’s geomagnetic fields on the primary cosmic radiations.

Flying can add a few extra mrem to your annual dose, depending on how often you fly, how high the plane flies, and how long you are in the air.

Calculated cosmic ray doses to a person flying in subsonic and supersonic aircraft under normal solar conditions
Route Subsonic flight at 36,000 ft (11 km) Supersonic flight at 62,000 (19 km)
Flight duration
Dose per round trip Flight duration
Dose per round trip
(mrad) (µGy) (mrad) (µGy)
Los Angeles-Paris 11.1 4.8 48 3.8 3.7 37
Chicago-Paris 8.3 3.6 36 2.8 2.6 26
New York-Paris 7.4 3.1 31 2.6 2.4 24
New York-London 7.0 2.9 29 2.4 2.2 22
Los Angeles-New York 5.2 1.9 19 1.9 1.3 13
Sydney-Acapulco 17.4 4.4 44 6.2 2.1 21

Other sites with good information on cosmic radiation is The Exposure Of New Zealand Aircrew To Cosmic RadiationAustralian Aircrew To Cosmic Radiation and SEC Radiation Hazard page

Astronauts are exposed to cosmic radiation, but they are also exposed to radiation as they pass through the Van Allen radiation belts that circle the Earth.


References and Additional Information Sources


Source :

Why India, the world’s third largest power producer is energy poor

Why India, the world’s third largest power producer is energy poor

 TNN | Updated: Oct 3, 2017, 02.21 PM IST
 Showing a significant increase in electricity generation, India is now the third highest producer in the world. Generation alone, however, is a misleading indicator of quality of life because when it comes to per capita consumption of electricity, India ranks 105 among 143 countries for which data is availab…Continue Reading

Link :

Complaint of export of monazite by Private Beach Mineral Companies all are false – Tuticorin Customs confirmed this.

Tuticorin Customs Commissionerate is the In-Charge for  export and Import through Tuticorin Port. The Customs Commissioner confirm that, no export of Monazite, Uranium and Thorium for the last 10 years. This will establish that, there is vested interest to make false complaint against Beach  Mineral Industries.