Is the Correct Way to Write Reactivity in Dollars $0.43?

[Smed]

When writing a reactivity in dollars, what is the proper notation?

Would it be 0.43$ or $0.43? or is it just 0.43?

Thanks,
Smed

 

[Astronuc]

When writing a reactivity in dollars, what is the proper notation?

Would it be 0.43$ or $0.43? or is it just 0.43?

Thanks,
Smed

I've seen it written as $0.43, which is the way I was taught. This example indicates 43 cents, of course.

This more a term used in nuclear engineering, where "one dollar of reactivity is equivalent to the effective delayed neutron fraction, ß_eff". If the reactivity of the core is one dollar, the reactor is prompt critical.

More often I see the unity pcm.

But then this book - Nuclear engineering: theory and technology of commercial nuclear power By Ronald Allen Knief has reactivity written as n$, where n is the value.

Slide 9 of this presentation - http://documents.epfl.ch/groups/l/lr/lrs-unit/www/Neutronics/Lesson%2013/NeutronicsCR-13Lectures.pdf
has units 1$.

I'd say go with 0.43$, but check with the instructor/professor.