Fwd: Re: chirper

[Dave Derenzo <dave@UIC.EDU>]

>Date: Wed, 29 May 2002 12:54:41 -0500

>To: William V Lipton <liptonw@DTEENERGY.COM>

>From: Dave Derenzo <dave@uic.edu>

>Subject: Re: chirper

>

>Well, the subject line IS "chirper" and no one says that you can't wear 

>one in addition to an "alarm."  The whole point is that a low cost chirper 

>could have prevented this incident because the high dose rate would have 

>been detected long before a pre-determined dose had been reached.  From 

>practical experience in the radiopharmaceutical industry I can verify that 

>use of a chirper is an extremely good way of providing instant feedback to 

>radiation workers and is very effective in reducing exposures.

>

>Dave Derenzo

>UIC

>

>At 11:07 AM 5/29/02, you wrote:

>>I'm somewhat confused by all this.  This thread started as a discussion on

>>radiography.  It now seems to be people comparing notes on where to find the

>>cheapest "chirper."  Two points:  (1) As I noted in an earlier post, 10 

>>CFR 34

>>requires radiographers to use "an operating alarm ratemeter," NOT a chirper.

>>These devices are required to alarm at a preset dose rate.  Many of them also

>>alarm on integrated dose.  The better models can also generate a time 

>>versus dose

>>rate histogram, which is invaluable for accident investigation.  (2) These

>>radiography licensees are generally not "mom and pop" operations, 

>>although they

>>are sometimes very stingy regarding safety expenditures.  They should be 

>>buying

>>state of the art instrumentation, training their people on its proper 

>>use, AND

>>enforcing safety requirements.

>>

>>The opinions expressed are strictly mine.

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

>>Curies forever.

>>

>>Bill Lipton

>>liptonw@dteenergy.com

>>

>>

>> > ...

>>

>> >

>> > > --- Ted de Castro <tdc@XRAYTED.COM> wrote:

>> > > > I agree - have you tried to buy a just plain chirper

>> > > > lately???

>> > > > Everything is an EPD and much more expensive (and

>> > > > complicated) than a

>> > > > simple chirper needs to be.

>> > > >

>> > > > They have gotten carried away - they don't need to

>> > > > be exposure or energy

>> > > > linear - they just need to be sensitive, robust,

>> > > > non-paralyzable and

>> > > > cheap.  The cheaper they are - the more they will be

>> > > > bought - and used.

>> > > >

>> > >

>> > > >

>>

>>************************************************************************

>>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/