Table 1: Water collected in the Centre de la Manche underground gallery

1 January 2000


?1991 2007
Volume 21,000 m3 300 m3
Alpha activity 0.4 GBq 0.005 GBq
Beta activity (except tritium) 1.3 GBq 0.01 GBq
Tritium 1700 GBq 4.4 GBq



Privacy Policy
We have updated our privacy policy. In the latest update it explains what cookies are and how we use them on our site. To learn more about cookies and their benefits, please view our privacy policy. Please be aware that parts of this site will not function correctly if you disable cookies. By continuing to use this site, you consent to our use of cookies in accordance with our privacy policy unless you have disabled them.