12.  Appendices

12.1  Element Analysis Assessment, Compiled by John Hadder 3/11/05

Key for Table 12.1: 

YMP - Y indicates that the element was included in the DOE’s analysis for the 2000 TSPA for the Site Recommendation[1] 

NTS, 1 - Y indicates that the element was a candidate for contamination at the NTS and satisfied one or more criterion; amount produced, mobility in the groundwater, and health impacts.[2] 

NTS, 2 - Y indicates elements for final consideration of NTS contamination.

40CFR141 - Y indicates that this element (isotope) is required for compliance with the Safe Drinking Water Standard[3] 

Home Anal. - a simple numerical tally was done combining the top thirty radionuclides in each of three categories; total curies, potential solubility, and EPA MCL’s based on effective dose equivalent of 4 mrem/yr for beta and photon emitters, and 15pCi/L for alpha emitters.  Any radioisotopes with a tally of three or two was included in the consideration list and is designated with a Y.

M, NTS and H, NTS - indicates mobility and health respectively; Y designates that the element satisfied that criterion by the peer review panel.

Ci -  approx. total curies determined from the YM FEIS[4] (commercial spent fuel inventory, significant DOE owned amounts under the “proposed action,” and unclassified amounts for 76 underground tests in Areas 19 and 20 below or within 100 meters of the water table.[5] 

EPA (pCi/L) - MCL’s in picocuries per liter obtained for 4 mrem/yr and 15 pCi/L for beta/photon and alpha emitters respectively with a risk assumption of approximately 1-5 x10-4.[6]; MCL’s for uranium isotopes are based on kidney toxicity, as it is lower than MCL’s for cancer.

Solubility - potential solubility in considering ingestion of radionuclides[7] 

Half life - mostly from YM FEIS, and some from Brechin, Martin

Table 12.1 Section 1: Element Analysis Assessment Table

Element

Rank

YMP

NTS, 1

NTS, 2

40CFR141

Home Anal.

M, NTS

H, NTS

Ci

EPA (pCi/l)

Solu-bility

Half life (yr)

Ameri-cium-241

1

Y

Y

Y

 

Y

 

Y

2.21E+08

1.90E+01

1.00E-03

4.30E+02

Ameri-cium-243

1

Y

 

 

 

Y

 

 

1.90E+06

1.90E+01

1.00E-03

7.40E+03

Carbon-14

1

Y

Y

Y

 

 

 

Y

1.05E+05

3.20E+03

1.00E+00

5.70E+03

Cesium-137

1

Y

Y

Y

Y

Y

 

Y

5.43E+09

1.19E+02

1.00E+00

3.00E+01

Curium-244

1

 

 

 

 

Y

 

 

1.21E+08

2.30E+01

1.00E-03

1.80E+01

Europium-154

1

 

Y

 

 

Y

 

 

1.20E+08

5.73E+02

1.00E-03

8.60E+00

Tritium

1

 

Y

Y

Y

Y

Y

 

1.60E+07

6.09E+04

1.00E+00

1.23E+01

Iodine-129

1

Y

Y

Y

Y

Y

Y

Y

2.44E+03

2.10E+01

1.00E+00

1.70E+07

Neptun-ium-237

1

Y

Y

Y

 

Y

Y

Y

3.06E+04

3.20E+01

1.00E-03

2.10E+06

Plutonium-238

1

Y

 

 

 

Y

 

 

2.43E+08

1.50E+01

1.00E-05

8.80E+01

Plutonium-239

1

Y

Y

Y

 

Y

 

Y

2.44E+07

1.50E+01

1.00E-03

2.40E+04

Plutonium-240

1

Y

Y

 

 

Y

 

Y

3.63E+07

1.40E+01

1.00E-03

6.50E+03

Plutonium-242

1

Y

 

 

 

Y

 

 

1.40E+05

1.50E+01

1.00E-03

3.80E+05

Radium-226

1

Y

 

 

Y

 

 

 

na

5.00E+00

2.00E-01

1.60E+03

Radium-228

1

 

 

 

Y

 

 

 

na

2.00E+00

2.00E-01

5.75E+00

Strontium-89

1

 

 

 

Y

 

 

 

na

5.99E+02

1.00E+00

1.38E-01

Strontium-90

1

Y

Y

Y

Y

Y

 

Y

3.38E+09

4.20E+01

1.00E+00

3.00E+01

Techne-cium-99

1

Y

Y

 

 

Y

Y

 

1.00E+06

3.79E+03

8.00E-01

2.10E+05

Thorium-229

1

Y

 

 

 

 

 

 

2.89E+01

9.00E+00

2.00E-04

7.90E+03

Uranium-232

1

Y

 

 

Y

 

 

 

3.88E+03

2.00E+01

2.00E-03

6.90E+01

Uranium-233

1

Y

 

 

Y

 

 

 

1.28E+04

2.00E+01

2.00E-03