d APPENDIX # CALCULATIONS Gacma Dose Rate from a Field Six Inches in Radius and Chander a ~—., a Canter of Four - | incies Aove Surface ad Dose rate of gamma froz @ point souree r26cy where: r = r/or C= activity in curles per square foot Fs average energy of gamas (Hey) Qr - 6CE. 2 7f heyxe - 6 h2/x2 Frarples Lets _—— - ~° x 1/2 feet € 2 LO F = 0.7 pe/em? or 3,6x 107? ef/rt? Her h = 1/3 foot (gasaa) 2 oye «= 0,56 rfhr De - . Comparison Gasca Dose Pates From Infinite Plane at a Feiget of Three Fect ~~- A ove the Ground to Area of Six Inch Radius asd Heig:t of Four Inches, Assume: 1 megacurie/mile® (3.6 x 10-2 o/ft2) b.1 rie = 7.3 0,56 r/ur ‘s x a Res Wa 8 ef pe ' . . * . ' , SE meet T= OS—