September 10, 1982

RISK COEFFICIENTS
Both BEIR I and BEIR III risk coefficients are used.
follows:

These are as

BEIR I

Cancer--Minimum:

Absolute risk of leukemia (26 x 107 rem!) +
30 year elevated risk for other cancers

(61 x 107& vem!) = 87 x 1076 rem™!.

Maximum:

Genetic Effects:

Relative risk of leukemia (37 x 107& rem-!) +
lifetime elevated risk (421 x 107© rem-!) =
458 x 10-© rem7!,
0.2% per rem in first generation.

BEIR Til
Cancer--Minimum:

Absolute lifetime risk of cancer for continuous

exposure, 67 x 107® rad7! (low LET) based on
linear quadratic model.

Maximum:

Relative lifetime risk of cancer for continuous

exposure, 430 x 107® rad-1, based on linear

model.

Genetic Effects--Minimum:
Maximum:

75 x 107~© increase per rem in first
generation.
5.0 x 107°© increase per rem in first
generation.

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