Re: ANSI/HPS N43.6-1997 and ISO 2919-1999

[David W Lee <lee_david_w@LANL.GOV>]

Leif:



The previous version of ANSI N43.6 (1997) was called ANSI N542-1977, which 

was later renumbered and reaffirmed without any changes being made to ANSI 

N43.6-1977 (R1989).  Only in the 1997 edition were the changes recommended 

in 1989 incorporated.  ISO 2919-1980 basically took the ANSI N43.6 (1977) 

more or less word-for-word and merely published it in ISO format.  In its 

recommendations, ISO 2919-1980 is virtually identical to ANSI N43.6 

(1977).  The 1997 edition of ANSI N43.6 differs from the 1977 edition in 

that on page iv it is stated "The most significant change was increasing 

the temperature requirement in table 4 from class 4 to class 5 for category 

IV gamma irradiators due to the potential for fires.  Numerous references 

were updated, and an immersion test was added to annex A.  The entire 

document was converted to the new ANSI style."



I note that the text of your comment below references ISO 2919 (1980), but 

the subject line specifies a 1999 edition of ISO 2919.  I do not have a 

copy of ISO 2919 (1999), but my best guess is, as described above, it is 

virtually identical in its recommendations to ANSI N43.6 (1997).



Best regards David



At 03:25 PM 9/25/2001 +0800, you wrote:

>Dear all

>

>ANSI/HPS N43.6-1997, "Sealed Radioactive Source - Classification," and

>ISO.2919-1980, "Sealed Radioactive Sources - Classification"

>

>I would be grateful of any comments on differences between these two

>standards (if any). In particular, any differences in the performance

>classification for sealed sources used in well logging.

>

>Leif Dahlskog

>Radiation Health Section

>Department of Health, Western Australia

>ph (+61 8) 9346 2260

>fax(+61 8) 9381 1423

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DAVID W. LEE, CHP

Los Alamos National Laboratory

Radiation Protection Services

Radiological Engineering Team Leader

ESH-12, MS K483

Los Alamos, NM  87545

PH:   (505) 667-8085

FAX:  (505) 667-9726

lee_david_w@lanl.gov



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