AW: [ RadSafe ] doses below 7,5mySv

[Franz Schönhofer]

Barbara,

I thought it would be better to split my reply into halves......

Your remark "Marco, If you have a lot of experience in this area..." is a
"contradictio in se". Even if you have not read his previous remarks and my
claim that he is a troll it should be obvious by his latest "question" - a
standard for trolls to open "discussions" by putting silly questions - that
he is one and has not the slightest idea about radiation protection.

He mentions "doses below 7,5mySv". Anybody ever heard about this unit?
Following the rules of the IUPAC it might be "milliyearsSievert". What is a
milliyear? (I am not sure, but I rather think that "year" is in the IUPAC
system characterised by "a" (annum in Latin). It cannot be milliSievert,
because this would be "mSv", it cannot be "microSievert", because this
should be indicated by the greek letter for "micro" or - as I usually do,
because I am too lazy to search on the keybord for this letter - as I wrote
above "microSievert" or sloppyly "microSv". Since "micro" is written with
"i" "my" cannot be an abbreviation for "micro". So what is it? This troll
seems not to be well educated!!

Let's assume that this troll means "7.5 microSievert" (now I use the US
decimal point (not sure that this is the correct expression) rather than the
European comma). What does it mean? Per second, per day, per hour, per year
or per lifetime? Where have you found this "method"? In what context? 

Stop fooling us! I recommend to the RADSAFE community to either ignore his
messages or to tell him to refrain from further messages to RADSAFE. Do not
waste your time - you will receive for every answer a new silly "question".

Best regards,

Franz

Franz Schoenhofer, PhD
MinRat i.R.
Habicherg. 31/7
A-1160 Wien/Vienna
AUSTRIA


-----Ursprüngliche Nachricht-----
Von: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] Im Auftrag
von blreider at aol.com
Gesendet: Donnerstag, 16. Juli 2009 16:01
An: m.c.baehler at bluewin.ch; radsafe at radlab.nl
Betreff: Re: [ RadSafe ] doses below 7,5mySv

Marco, 

If you have a lot of experience in this area, please excuse me for stating
the obvious.  You have not really given enough information to assess the
situation.  Any good dose program requires a technical basis for making
decisions.  The technical basis should include factors such as dose
limits, background and other interferences, missed dose (statistical
sensitivities), frequency of the monitoring & expected and known statistical
variability and process bias.  The processes used should regularly be tested
using a quality assurance program.  

The US NRC provides regulatory guides for developing dose evaluation
programs among other things:

http://www.nrc.gov/reading-rm/doc-collections/reg-guides/occupational-health
/active/

Years ago in the US it was common practice to round negative dose up to
zero; this practice has been dropped in favor of using actual data (unbiased
results).   If you have data, use your data.  If your results are always
reported as <MDA or some other statistical value, consider the "missed dose"
and if too large with respect to reporting limits, the possibility of
changing methods of detection and reporting.  

Hope this helps.

Barbara Reider, CHP


-----Original Message-----
From: marco bähler <m.c.baehler at bluewin.ch>
To: radsafe at radlab.nl
Sent: Thu, Jul 16, 2009 8:00 am
Subject: [ RadSafe ] doses below 7,5mySv


I `d like to know more about rounding to zero the doses below 7,5 mySv.
history of this method, pros and cons ? 
aprecciate your c
ontribution 
marco 
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