Opened 5 years ago

Closed 5 years ago

Last modified 5 years ago

#189 closed Support (fixed)

FLEXPART Release - Consistent Cs-137 isotope releases and output interpretation

Reported by: acheloni Owned by:
Priority: major Milestone:
Component: FP other Version: FLEXPART 9.0.2
Keywords: Flexpart release Cc:


Hello everyone,
I'm trying to correctly set releases to simulate a nuclear plant incident.

I tried with masses (Kg) to specify the release.

An incident such as Fukushima or Chernobyl with about 1016 Bq Cs-137 radionuclide activity, the corresponding mass released in the atmosphere is about 3.2Kg.

With "3.2" set for masses and a 12hr release, the resulting Cs-137 forecasted concentrations are lower than 10-13 (Kg/m3 ?).

Is that a sounding result or I'm missing something?

Generally, what's the "best" way to configure a nuclear plant incident?

Thank you in advance

Alessandro Cheloni

Change History (7)

comment:1 Changed 5 years ago by pesei

Hello Allessandro,

why do you think that <1e-13 kg/m3 would be too low? If 1e16 Bq is about 1 kg, then this is is about 1 kbq/m3 which is not too low.

By the way, if you express your source as TBq, you will obtain concentrations in Bq/m3.

comment:2 Changed 5 years ago by pesei

Are you satisfied? Can we close the ticket?

comment:3 Changed 5 years ago by acheloni

sure, sorry for the late response.

Thank you so much

comment:4 Changed 5 years ago by pesei

  • Resolution set to fixed
  • Status changed from new to closed

comment:5 Changed 5 years ago by acheloni

Hello, excuse me but where do I find the option to set sources as TBq? I'm running flexpart 9.0.

thank you again

comment:6 Changed 5 years ago by pesei

You don't need an option. The ratio TBq / Bq is 10e12. As you can see from the FLEXPART manual, if sources are given as kg, output fields will contain concentration in 1e-12 kg/m3 (a factor of 1e-12 is built into FLEXPART for forward runs).

btw, this type of question is what the mailing list is intended for!

comment:7 Changed 5 years ago by mdmulder

Last edited 5 years ago by pesei (previous) (diff)
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