Re: Activation and dose rate in concrete in 40 years.

Regardless of whether you can set it up or not, I don't think that the fine
structure of the irradiation matters too much for long cool-down times.
You could probably account for the duty cycles as an average power, for instance,
if a 4 kW beam is ON 6 h per day, just use a 1 kW beam which is ON 24 h a day.=20

On Aug 9, 2012, at 4:01 PM, Mina Nozar wrote:

> Hello Alberto and Mary,
>
> Thank you for your replies.
>
> My question is in regards to a new project, namely shielding assessment for a vault/target area holding a 24 MeV
> cylotron, with multiple beamlines, targets, beam intensities and profiles.
>
> I am sorry but my question was not stated correctly. Turns out the CNSCwould like to have an overview of the
> radiological state of the cyclotron room at the time of decommission, (30-40 years after the operation). So mainly long
> lived activation in concrete (Eu-152, Eu154, Co-60, Cs-134, Ba-133).
>
> Am I correct to say that I the limitation of 20 irradiation time intervals (via IRRPROFI cards) is for older versions of
> FLUKA? Looking through the manual for 2011.2.13, I don't see this anywhere. All I see (under section 7.36: IRRPROFi),
> is note 1:
>
> "Several cards can be combined up to the desired number of irradiation intervals."
>
> So, is there an unlimited irradiation time intervals that a user can set(not that I am going to go through the trouble
> of setting time intervals such as (2 hours/per irradiation * 2x daily) for a total of 1000 hours per year for 30 years
> for a particular target for instance).
>
> Thank you,
> Mina
>
Received on Fri Aug 10 2012 - 10:04:17 CEST