# Re: [fluka-discuss]: Ques on Biasing

From: Raksha Rajput <rakshak_at_britatom.gov.in>
Date: Thu, 7 May 2020 12:12:06 +0530 (IST)

Dear Experts,

Please find attached the biasing I have used in the input. As I understood from one of the examples given in the FLUKA Course, giving "BIASING 0.0 1. BLKBODY _at_LASTREG 1.PRINT" means giving importance 1 to regions outside shield. Am I wrong to understand this ? I am sorry, I missed to have added any biasing for green regions (which are SS material).

Secondly, by the results are higher by a factor of 1000, I mean to say, the dose rates which I should get in mSv/h, I am getting in Sv/h.

Thanks and regards,
Raksha R.

----- Original Message -----
To: "Raksha Rajput" <rakshak_at_britatom.gov.in>
Cc: fluka-discuss_at_fluka.org
Sent: Wednesday, May 6, 2020 8:41:57 PM
Subject: Re: [fluka-discuss]: Ques on Biasing

Hello
The geometry looks fine, I cannot judge on biasing not knowing the factors
you used. However: what is the weight assigned to the green regions in
your plots? And to outside air?
Could you please explain what do you mean by "results a factor 1000
higher than expected"?
Thanks
Paola

On Tue, 28 Apr 2020, Raksha Rajput wrote:

> Dear Experts
>
> Please find attached the geometry cross-section.
> 1. RCC (A10) is cut by planes to divide it into regions, for Biasing (surface-splitting, increasing no. of photons per region)
> 2. RCC(A14) is also cut by same planes (as these are infinite), to divide for biasing. Is this the correct way ? OR, it should be done by making concentric RCCS as is done for RCC(A7). A10 & A14 for Axial points (Top of the shield).
> 3. RCC(A7) is divided into regions by making concentric RCCs - to calculate the dose rates in radial points.
> Kindly suggest whether the regions are divided correctly.
> The results I am getting are higher(by a factor of 1000) than expected.
>
> Regards,
> Raksha.
>
>
>

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(image/png attachment: input_Biasing.png)

Received on Thu May 07 2020 - 10:11:27 CEST

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