Fearns Babcock & Wilcox Reactirule

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Country of manufacture: England,            Date of manufacture: >= 1970
Diameter: 12.8 cm,      Weight: 76.4 gms
Materials: all plastic
Cursor: plastic w/metal tensioning spring; single line
Scales: 6, specialty
Front: β efficiency, PCM Reactivity [ Reactivity in Cents, Doubling Time in Seconds, Period in Seconds, Startup Rate in Decades/Min
Back:Graph of Negative Reactivity vs. Negative Period, Graph of Effectieve Delay Fraction vs. Lifetime for PWR Cores
Gauge Marks: [      ]
Condition: C2 (Mint but instruction sheet ripped)
Came with: Black plastic case, instruction sheet

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