ML20058N461
| ML20058N461 | |
| Person / Time | |
|---|---|
| Issue date: | 07/26/1990 |
| From: | Carr K NRC COMMISSION (OCM) |
| To: | Geoffrey Miller HOUSE OF REP., INTERIOR & INSULAR AFFAIRS |
| Shared Package | |
| ML20055H726 | List: |
| References | |
| FRN-53FR49886, RULE-PR-CHP1 CCS, MILLER-900726, NUDOCS 9008140148 | |
| Download: ML20058N461 (1) | |
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i OVESTION 12.
What is the lifetime risk of death from a radiation-induced cancer from an-individual radiation dose of 100 millirem
.per year,10 millirem per year, and 1 millirem per year?'-
l ANSWER.
I The hypothetical lifetime risks of death:by radiation-induced, cancer as 'a i
function of a continuous 70 year dose are estimated in Table 1 of the Policy Statement; namely,100 millirem per year - 3.5 x 10-3 (approximately 3 chances in a thousand); 10 millirem per year,- 3.5 x 10'4 (approximately 3 chances in i,
-ten' thousand); and 1 millirem per year - 3.5 X 10-5 (approximately 3 chances inonehundredthousand).
However, as pointed out in the recent report, j
" Health Effects of Exposure to low-l.evels of Ionizing Radiation"' authored by the National Research Council's Comittee on the Biological Effects of Ionizirg Radiation (BEIR V), "...epidemiol' gic data cannot rigorously exclude o
the' existence of a threshold [for dose related health effects) in the mil 11 sievert [(100 millirem)]doserange. Thus, the possibility that there mcy be no risks from exposures comparable to' external natural: background radiation cannot be ruled out."