Difference between revisions of "Definitions, units and constants"

From Serpent Wiki
Jump to: navigation, search
(Definitions)
 
(7 intermediate revisions by 4 users not shown)
Line 2: Line 2:
  
 
*ZA defines the element and isotope as 1000 <math>\times</math> Z + A, where Z is the proton number and A is the mass number. For example, the ZA for U-235 is 92235.
 
*ZA defines the element and isotope as 1000 <math>\times</math> Z + A, where Z is the proton number and A is the mass number. For example, the ZA for U-235 is 92235.
 +
*ZA.id defines nuclides in cross section data libraries. ZA identifies the nuclide and id is the library id (for example, 92235.09c).
 
*ZAI defines the element, isotope and isomeric state as 10000 <math>\times</math> Z + 10 <math>\times</math> A + I, where Z is the proton number, A is the mass number and I is the isomeric state. For example, the ZAI for U-235 is 922350 and the ZAI for Am-242m is 952421.
 
*ZAI defines the element, isotope and isomeric state as 10000 <math>\times</math> Z + 10 <math>\times</math> A + I, where Z is the proton number, A is the mass number and I is the isomeric state. For example, the ZAI for U-235 is 922350 and the ZAI for Am-242m is 952421.
  
Line 13: Line 14:
 
| Distance
 
| Distance
 
| cm
 
| cm
|
+
| Apart from solid 2 (unstructured mesh) points file which are in m
 
|-
 
|-
 
| Area
 
| Area
Line 25: Line 26:
 
| Time
 
| Time
 
| s
 
| s
| depends on the case
+
| depends on the context
 
|-
 
|-
 
| Energy
 
| Energy
Line 40: Line 41:
 
|-
 
|-
 
| Mass
 
| Mass
| g
+
| g or kg
|
+
| depends on the parameter
 
|-
 
|-
 
| Mass density
 
| Mass density
Line 57: Line 58:
 
| Power density
 
| Power density
 
| kW/g
 
| kW/g
 +
| ( = MW/kg)
 +
|-
 +
| Temperature
 +
| K
 
|
 
|
 
|-
 
|-
Line 94: Line 99:
 
| The smallest nonzero absolute value
 
| The smallest nonzero absolute value
 
|}
 
|}
 +
 +
[[Category:Input]]
 +
[[Category:Output]]
 +
[[Category:Theory]]

Latest revision as of 20:26, 16 December 2020

Definitions

  • ZA defines the element and isotope as 1000 \times Z + A, where Z is the proton number and A is the mass number. For example, the ZA for U-235 is 92235.
  • ZA.id defines nuclides in cross section data libraries. ZA identifies the nuclide and id is the library id (for example, 92235.09c).
  • ZAI defines the element, isotope and isomeric state as 10000 \times Z + 10 \times A + I, where Z is the proton number, A is the mass number and I is the isomeric state. For example, the ZAI for U-235 is 922350 and the ZAI for Am-242m is 952421.

Units

Quantity Unit Notes
Distance cm Apart from solid 2 (unstructured mesh) points file which are in m
Area cm2
Volume cm3
Time s depends on the context
Energy MeV
Microscopic cross section b barn = 10-24 cm2
Macroscopic cross section 1/cm
Mass g or kg depends on the parameter
Mass density g/cm3
Atomic density 1024/cm3 ( = b-1cm-1)
Power W
Power density kW/g ( = MW/kg)
Temperature K
Particle flux 1/cm2s
Reaction rate 1/cm3s reaction rate density
Burnup MWd/kgU per total initial heavy metal
Burn time days

Constants

Constant Value Units Notes
INFTY 1037 N/A Used to denote infinity
ZERO 10-37 N/A The smallest nonzero absolute value