RE: Compensation of survivors (Lead Apron Dosimetry)

[L_K_II_Les_Aldrich@RL.GOV]

Nowadays, we put two dosimeters on the worker, one inside the apron and the

other on or near the head on the outside of the apron.  Then you calculate

the Effective Dose Equivalent as described in HPS N13.41-1997, applying the

inside dosimeter whole body results to the portions of the body covered by

the apron and the outside dosimeter whole body results to the portions of

the body outside the apron.  The outside dosimeter also provides lens of the

eye and skin dose numbers.



If only one dosimeter is used, it has to be outside the apron to

conservatively assign whole body, eye, and skin dose.  In addition to the

head, the upper arms and upper legs are also part of the whole body and are

not necessarily covered, especially by the shorter lead "aprons".



Just a personal observation.



Les Aldrich









-----Original Message-----

From: William V Lipton [mailto:liptonw@DTEENERGY.COM]

Sent: Thursday, August 16, 2001 10:20 AM

To: ''internet RADSAFE ' '

Subject: Re: Compensation of survivors









BERNARD L COHEN wrote:



> "...

>         --What were their exposures in mrem? I worked in Y-12 (Oak Ridge)

> from 1950 to 1958 and can testify that great care was taken about

> radiation exposures. My assistant was taken away from me because he wore

> his radiation badge outside his lead apron, and no arguments were

> accepted. The HPs had unlimited authority and they used it freely.

> ..."



You've got me on this one.  The head is part of the "whole body."  Unless

the lead

apron covered the worker's head, it would seem  appropriate to wear the

dosimeter

outside of the apron.  Also, how did you measure lens dose?



The opinions expressed are strictly mine.

It's not about  dose, it's about trust.



Bill Lipton

liptonw@dteenergy.com





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