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§ 63.331 Separate standards for protection of ground water.
Ground Water Protection Standards
§ 63.331 Separate standards for protection of ground water.
DOE must demonstrate that there is a reasonable expectation that, for 10,000
years of undisturbed performance after disposal, releases of radionuclides from
waste in the Yucca Mountain disposal system into the accessible environment
will not cause the level of radioactivity in the representative volume of ground
water to exceed the limits in the following Table 1:
Table 1.--Limits on Radionuclides in the Representative
Volume
Radionuclide or type of radiation emitted |
Limit |
Is natural background included? |
Combined radium-226 and radium-228. |
5 picocuries per liter |
Yes |
Gross alpha activity (including radium-226 but excluding radon and
uranium). |
15 picocuries per liter. |
Yes |
Combined beta and photon emitting radionuclides. |
0.04 mSv (4mrem) per year to the whole body or any organ, based
on drinking 2 liters of water per day from the representative volume. |
No |
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