BROOKHAVEN NATIONAL LABORATORY

CHE

ASSOCIATED UNIVERSITIES, INC.
Upton, Long Island, New York 11973

Safety & Environmental Protection Division

R

410001

(516) 282.

FITS 666% 4959

September 14, 1984

Dr. William Bair, Ph.D.

Battelle Pacific Northwest Laboratories
P.O.

Box 999

Richland, WA

99352

Dear Dr. Bair:

Thank you for the opportunity to discuss plutonium dose calculations.
have some additional information which I would like to pass on to you and
other persons who were present at the meeting.

I

Our current estimate of Pu activity in the urine of former Bikinians is
now 5 fCi. This is less than the 12 fCi reported by me at the meeting because
a longer counting of the sample has allowed better statistics.
Keith Eckerman has noted an error in my meeting notes regarding the Moss

retention function.

I have corgected this and the last exponent in the Moss

function should read -4.8 x 10° t.. This correction leads me to conclude that
the Moss function is comparable to the ICRP, Leggett and Durbin functions.
I have reworked the former adult Bikini resident's estimated 239py
committed dose equivalent.
I based it on 5 fCi in urine, constant continuous
intake and ICRP 30 values for committed dose equivalent per unit uptake.

Model

Bone
Surface

rem
.

Liver

Red
Marrow

Effective

ICRP 30

15

3.0

1.1.

0.79

Leggett

20 ©

4.2

1.5

1.1

Durbin

20

4.2

1.5

1.1

Moss

10

2.1

0.77

0.55

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