Tone Peel Erhibit L PRIVACY ACT MATERIAL REMOVED May 24, 1948 TO: " L. H. Henpelnann, H-Divyision : EROMs ‘Js 0, Boffasn Oo SUBJECT: DOSAGEESTIMATES ON SARDSTONE PERSONNEL BASED ON IBIEHVIEWSWITH 1. Rod Spence supplied the following data on the hottest filter papers measured st 10:05 p.m., Saturday, May 15, 1948. This is 36 hours after zero tines | Paper #1 6 60" (153 om), 14 ywi/nr; or 450 ak/hr @ 2 bre Paper f2 6 kO" (108 ou), 18 yxR/hr; or 600 nk/hr @ 2 hrs The papers are sbout 10" x 18". The intensity at 36 hrs is based on a 1.2 power decay of Yintensity with time. It is assumed that we have a point source effect. Ths above sources referred ts 1 om distance become: 2. Paper #1 1.0 x 10! ex/fr @1 em € 2 hrs Paper $2 7 208 an/ar 6 1 on.@ 2 bre First we shall estimate the order of magnitude of beta curies an the filter sheets. Fron measuremsnte on vater boiler ectivation of WaCl for a we found } betas; Bx 10° Pp cya/mgn NaCl gemmas; 0.72 )nR/br/mgz Mall @ 1 em dist The relation between B ani Yactivity is then 8 z 10*/o.72 or 1.1 x 109 B cpn/jeR/hr for HaBh Filter paper #2 above than had at 2 hrs tine: 7 Tx10°x14 210727 T-T x 10 COPIED/DOE LANL Ra” 10 = 1. 3x 107 1.3 x 10°°/3.7 x 102° =z» . opm per sheet, total cps per sheet, 0.35 B curies G 2 hrs per ‘sheet PRIVACY ACT MATERIAL REMOVED Exhibit L RE 9g/,17 /;om wy, CANCELLED &Aton misay eCYT UTH Arar DOE/Oc ; 2 i