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burn-up
burn-up n.
Brit. 
/ˈbəːnʌp/
, /ˈbəːnʌp/U.S. /ˈbərnˌəp/
(a) the consumption of fuel in a nuclear reactor; (b) slang a ride on a motorcycle, etc., at an extremely high speed (cf. scorch v.1 3)./ˈbərnˌəp/ΘΚΠ
society > travel > transport > motorcycling > [noun] > fast ride
burn-up1954
society > occupation and work > materials > fuel > chemical fuel > [noun] > nuclear > consumption of
burn-up1954
1954 R. Stephenson Introd. Nucl. Engin. vii. 276 As a reactor continues to operate, the fissionable material is gradually used up and the reactivity may decrease accordingly. This is known as fuel depletion, or burnup.
1959 New Scientist 29 Jan. 239/1 A major aim is to obtain a large ‘burn up’—in other words to use up as large a proportion of the fuel as possible between refuelling operations.
1961 Guardian 18 Mar. 2/3 If I was going for a real burn-up, you wouldn't have caught me.
1963 A. Prior Z Cars Again iii. 26 Ton-up boys were doing early morning burn-ups at the Turntable Roundabout.
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