[ RadSafe ] formula and its derivation for rectangular extendedradioa...
JPreisig at aol.com
JPreisig at aol.com
Sat Jul 13 01:00:56 CDT 2013
Mike Brennan/Radsafe:
That's an interesting idea.
MCNP modeling shouldn't take a week, if one already has MCNP on a
PC. And PC's these days are
so very powerful. Problem setup for a rectangular source should take
about one day, and a first MCNP
run should take 4 to 8 hours or less. Perhaps then, one can directly
compare these Monte Carlo results with your measurements.
In the olden days, I sure would like to have come up with an analytic
and/or numerical solution. Solving problems this way forces one to
seriously understand the problem. The book on Mathematical Physics by Arfken
might be real helpful for getting an analytical or numerical solution. The
book Numerical Recipes by
Press, Teukolsky et al. has many different numerical solution algorithms,
complete with Fortran or C
computer code.
Pick a solution method or two and get cranking. You can't use MCNP on
the CHP exam!!!!
Joe Preisig
In a message dated 7/12/2013 5:05:48 P.M. Eastern Daylight Time,
Mike.Brennan at DOH.WA.GOV writes:
I know this is rather old school, but if the source really exists, and
there are actually people who do things near it, how about a
"tag-and-release" dosimetry program? Sometimes a day of measurement can
replace a week of modeling.
-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of dcoble tds.net
Sent: Friday, July 12, 2013 12:15 PM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: Re: [ RadSafe ] formula and its derivation for rectangular
extendedradioa...
Micro shield tm works also.
On Friday, July 12, 2013, <JPreisig at aol.com> wrote:
> Radsafe:
>
> I know this is overkill or too expensive or time consuming for
> some people/facilities, but one could readily set up a rectangular
> radiation source using MCNP (Monte Carlo Neutral Particle Program)
> and do a Monte
Carlo
> Run (or a few) and solve the problem. Do some of the simpler
> computer radiation codes model a rectangular source????
>
> Regards, Joe Preisig
>
>
>
>
> In a message dated 7/12/2013 2:36:29 P.M. Eastern Daylight Time,
> daniel.s.simpson at nasa.gov writes:
>
> George:
>
>
>
> I don't see a WORD file attached.
>
>
> Daniel S. Simpson
> Deputy Chief, Code 350 Occupational Safety & Health Division National
> Aeronautics and Space Administration Goddard Space Flight Center
> Greenbelt, MD 20771
> (301) 286-2281
> Fax: (301) 286-1745
>
>
>
> -----Original Message-----
> From: radsafe-bounces at health.phys.iit.edu
> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of George
> Chabot
> Sent: Friday, July 12, 2013 2:22 PM
> To: 'The International Radiation Protection (Health Physics)
MailingList'
> Subject: Re: [ RadSafe ] formula and its derivation for rectangular
> extended radioactive sources exposure rate
>
>
>
> Regarding the rectangular source, attached is a Word document showing
> the equation development. It is not possible to obtain a complete
> algebraic solution to the required integration, but the resulting
> equation is
easily
> solved using numerical integration.
>
>
>
> George Chabot
>
>
>
> -----Original Message-----
>
> From:
> radsafe-bounces at health.phys.iit.edu<mailto:
radsafe-bounces at health.phys.iit.edu>
>
> [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Danak,
> Subhash
M
> CTR DOD CAPMED FBCH
>
> Sent: Thursday, July 11, 2013 10:28 AM
>
> To: radsafe at health.phys.iit.edu<mailto:radsafe at health.phys.iit.edu>
>
> Subject: [ RadSafe ] formula and its derivation for rectangular
> extended radioactive sources exposure rate
>
>
>
> I like to review formula for rectangular radioactive sources exposure
rate.
>
> Please provide one.
>
> I thank you.
>
>
>
> Subhash
>
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