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UK DM project: radioactivity test results
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UK DM project: radioactivity test results |
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| sample (source) | analysis | U conc. (ppb) |
Th conc. (ppb) |
K conc. (ppm) |
comments | |
| by | method | |||||
| G-10 boards | J | ? | 100 - 150(a) | 100 - 150(a) | U + Th 2 - 3 Mru | |
| NAT E80 boards | J | ? | < 5(a) | < 5(a) | U + Th < 90 kru | |
| NAT PC75-CEM (cellulose) boards | J | ? | 90(a) | 90(a) | U + Th 1.7 Mru | |
| Steel (ex-RAL) | H | GES | total activity: 5(3) kru; < 1 kru (2 samples) |
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| Steel (ex-US) | H | GES | total activity: 67(5) kru | |||
| Analysts: | Analysis methods: |
| H: Harwell | GES: Gamma Emission Spectroscopy |
| J: D. Jankowski & T. Fields |
Notes:
| (a): | from (U + Th) rates, assuming conc(U) = conc(Th). |
Other remarks:
