DNA 1240H-2 Table 17-9. Estimates of portion of external gamma dose due to ingress of contominant, DD-592, Shot Umbrella, 66 Compartment GITR Total Dose (r) Film Badge Dose (r) Ingress Dose Estimate (r) {4% Contribution| Tue to 268 + 43 290 + 58 2 to 78 0.7 to 27 52+ 8 58 + 12 4 to 18 8 to 35 65 + 10 65 + 13 8 to 26 12 to 4o 61+ 12 95 +419 9 to,31 11 to 38 Forvari 25+h (lower Fireroomp: level) 26+5.2 8 to 13 33 to 50 After Fireroom 2B +h 28+5.6 toils 39 to 54 After Engineroom After Crew’ 26+4 32+6.u 1h to 28 5h to 69 [1.5 te 50 1 to 32 Galley “ForwardFireroom (upper level) After Fireroom (upper level) t ineroom \eperSeved) (lower level) (lover evel) Quarters. ° 1184 + 37 158 + 2h % that It was concluded” Ingress Dose full-power operation of both boilers with ventilation systems open would more than double the fireroom ingress dose estimated for the test conditions (l-boiler operation and sealed ventilation openings). In addition, use of regular boiler fuel (in- stead of the diesel o11 used during the tests) would result in larger soot deposits and therefore probably further increase deposits of radioactive material in the boiler. Estimates of total ingress dose (boiler air and ventilation air) from film-badge data for Shot Wahoo indicate that the doses in test compartments in DD~592 were comparable to those at Shot Umbrella, even though the ship was slightly further away from surface zero. Estimates of external doses due to boiler air alone on all the ships were higher Miles gy a COPY s ss wf ws) i Mi sop 7 w for Shot Wahoo than for Shot Umbrella by factors of 2 to 6. qa é mY: $ 17-110 St er me ee ee ee Ry