[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Another question re: dose
Richard
I haven't tried it but the HPS has a FAQ window on their website
(www.hps.org) and the information you want may be available there.
FYI, doses can be in Grey (absorbed dose in energy per unit mass) or two
kinds of Seiverts (1. equivalent dose in Greys x a radiation weighting
factor Wsub(R) or 2. effective dose (Esub(eff)) in Greys x a radiation
weighting factor Wsub(R) x a tissue weighting factor Wsub(T) ). The
effective dose is an attempt to calculate a quantity that is proportional to
the risk.
A whole body Esub(eff) of 10 mSv/year has a much higher risk than the same
Esub(eff) to a smaller tissue.
On the other question; all (or most) materials contain some radioactivity
(eg radon progeny in natural gas, etc) and what is contaminated and what is
not depends on who is asking the question and for what purpose.
John
________________
John R Johnson
4535 West 9th Ave.
Vancouver, B. C.
V6R 2E2
(604) 222-9840
idias@interchange.ubc.ca
----- Original Message -----
From: "Richard L. Hess" <lists@richardhess.com>
To: <radsafe@list.vanderbilt.edu>
Sent: Friday, September 06, 2002 2:35 PM
Subject: Another question re: dose
> A while ago someone posted an anti-nuke URL to this list. I went and read
> it and started seeing through all of the hoopla.
>
> One item caught my attention. Someone was trying to differentiate between
a
> whole-body dose (let's say 10mSv/year) and that same dose applied to a
> single point (I think the example was within the lung).
>
> I realize that an alpha emitter may create a much greater risk (why else
is
> its QF 20?) but I think I'm lost about whole body doses and point doses.
>
> Now that I'm thinking about it, how do some things become contaminated
with
> radiation while others don't?
>
> Pointers to GOOD FAQs would be useful (it's hard to separate wheat from
> chaff in this subject on the Web).
>
> A little math doesn't scare me...but lots of math does <smile>.
>
> Thanks!
>
> Richard
>
> ************************************************************************
> You are currently subscribed to the Radsafe mailing list. To unsubscribe,
> send an e-mail to Majordomo@list.vanderbilt.edu Put the text "unsubscribe
> radsafe" (no quote marks) in the body of the e-mail, with no subject line.
> You can view the Radsafe archives at http://www.vanderbilt.edu/radsafe/
>
************************************************************************
You are currently subscribed to the Radsafe mailing list. To unsubscribe,
send an e-mail to Majordomo@list.vanderbilt.edu Put the text "unsubscribe
radsafe" (no quote marks) in the body of the e-mail, with no subject line.
You can view the Radsafe archives at http://www.vanderbilt.edu/radsafe/