Re: [fluka-discuss]: Residual activity in target caused by given nuclide

From: Mikhail Polkovnikov <Михаил Полковников> <pmk_at_ihep.ru>
Date: Thu, 12 Mar 2015 22:39:34 +0300

On 12.03.2015 22:26, "Mikhail Polkovnikov <Михаил Полковников>" wrote:
> On 12.03.2015 19:46, Semen Kuten wrote:
>> Dear Fluka experts,
>> The task I solve is a residual nuclei,activity and dose rate
>> distributions in the target (Fe+Cu+trace amount of Co-59)
>> after 1 week irradiation with 450 GeV proton beam after cooling time
>> (1 week and 1 year), caused by Co-60 (Z=27,A=60).
>> As far as I understood from Fluka Forum, in this case Fluka can not
>> determine dose rate distributions, caused by Co-60.
>> As for caused-by-Co-60 activity, I have used recompiling Fluka with
>> corresponding user file ( attached fecu.inp and comcsw.f).
>> Total (over nuclides) and caused-by-Co-60 activities are obtained
>> through variable ACTIVITY. They seem to be
>> reasonable (first is greater than second).
>> But if I am trying to obtain this information through variable
>> RESNUCLE, I can not understand the results corcerning
>> Co-60 nuclide and its activity. One and the same quantitity (Co-60
>> activity) has different values (see below)
>> Result for 1 nuclide only:Co-60/cooling time:1 week/ comcsw.f
>> indicates this binning (#1) -> IF(ISCRNG.EQ.3.AND.JSCRNG.EQ.1)
>> fecu_29_sum.lis
>> Residual nuclei distribution **** **** (Bq/cmc)
>> Co-60 1.21E+02
>> Result for all nuclides, below Co-60 data only/cooling time:1
>> week/ comcsw.f does not indicate this binning (#2)
>> fecu_30_sum.lis
>> Residual nuclei distribution **** **** (Bq/cmc)
>> Co-60 2.41E+02
>> How can these results be interpreted ?
>> How can caused-by-Co-60 activity(total activity for Co-60) from
>> RESNUCLE be compared with the one from ACTIVITY
>> (2D or 3D distribution in target)?
>> Thank you very much for your help,
>> Siamion Kutsen
>
> Hi,
> To score an activity for specific isotope in RESNUCLE card there is
> the usrrnc.f user routine.
> I think without it the RESNUCLE card scores activity from all isotopes.
>
> Best regards.
>
Hi,

Forget about my the previous post, usrrnc.f is responsible for residual
nuclei production, not activity.
My bad, sorry.

Best regards,



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Received on Thu Mar 12 2015 - 22:32:00 CET

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