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Re: ALARA and "what is safe enough"

 
----- Original Message -----
From: Sandy Perle <sandyfl@EARTHLINK.NET>
To: <radsafe@list.vanderbilt.edu>
Sent: Saturday, March 09, 2002 11:16 PM
Subject: ALARA and "what is safe enough"

> The question should be "What is safe enough  (ie ALARA)?" not "What is
> safe?".

Food for thought?
> Food for thought?

a) replacement of ALARA with ALARP - Paper presented at IRPA 10

Paper 9-94 - Views expressed in the Nordic countries on the suggested modifications to the ICRP approach
P.H. Jensen3 , W. Paile1 and A. Salo2
1 Finnish Radiation and Nuclear Safety Authority, P.O. Box 14, FIN-0881 Helsinki, Finland
2 Nordic Society for Radiation Protection, Lepolantie 54, FIN-00660 Helsinki, Finland
3 Risų National Laboratory, P.O. Box 49, DK-4000 Roskilde, Denmark
 
"Professor Clarke makes a proposal, called ”Controllable Dose”, for revising the system. The essential
change in the philosophy proposed is to move from the present dual system of individual and source related
control to only control of the dose to individuals from sources that can reasonably be controlled, the principle
being as follows:
”If the risk of harm to the health of the most exposed individual is trivial, then the total risk is trivial -
irrespective of how many people are exposed”
 
This change in philosophy would have several consequences according to the proposal:
  • • dropping the principle of justification
  • • need for reformulation of the principle of optimisation
    • replacement of ALARA with ALARP
    • abandoning the concept of collective dose
  • • not distinguishing between practices and intervention
  • • possibly no need to differentiate between occupational, public and medical exposure
  • • no need for the existing dose limit of 1 mSv/a for the public"
Interesting paper,  if you are interested and do not have the CD, please send me an e-mail

b) About Safe, the Bo Lindell's text "How Safe Is Safe Enough? (Lauriston S. Taylor Lectures in Radiation Protection and Measurements, Lecture No 12, 1988) is a classical that explain details that only the Bo's imagination can do it in the exact horizon

c) Finally another document that can be downloaded in ppt "Changing Philosophy in ICRP by Roger H. Clarke, Proceedings of  33rd Annual NATIONAL CONFERENCE ON RADIATION CONTROL April 29 - May 2, 2001 Anchorage, Alaska  http://www.crcpd.org/proceedings.htm

I hope this is not an indigested food

Jose Julio Rozental
joseroze@netvision.net.il
Israel