2 3. Tasks and Plons of Attack 3.1 Radiction Measurements 3.1.1 Dotorminst at Verions Loeat no Rediction Field and Dose Tines, Attributable to tho Inveloping Contominnting Medium Since the washdown can bo expected to be effective as ec countermeasure only ageinst thet conteminant which hes collectod on the weathcr surfaces, it is of interest to detcrminc tho magnitude ° of thc gamma radintion field ond dose which will not be affectod by tho washdowm. In other literature the dose resulting from the enveloping contcminating medium hes been namod Transit DOSE, Two adjacent gamma radiation dose incroment recording stations, one of which is shiclded vith rospcet to radintion from collecting surfacos, located on top of the forward kingpost of each ship (see Station 9 and 10 in Tab A-3) will supply the information for this purpose. Attenuntion factors ill bo obtainod from the recorded data and geometry factors will be calculated. By means of tho deta collcctcd and the uso of Simultaneous equations, the effects duc to surface collection and the enveloping medium will be soparatod at these locations (see Tab A-4 for details end results). By means of assumption 1.6.2 the results of cffect due to the enveloping mecium are cirectly cpplicable to call veethorside locations. The Ship Shielding Group (Problom 6,4h) will use above results to determine the Transit Dose within the woether onvelope of the ships (sce Annex H), 3.1.2 Doterminetion of the Ovor-cll Gamme Rediation Ficlé one Dose ct Various Loeztions and Tines Gamma radiation dose increment recording stations at various locations on the ships (sce Tab A-3 for locetions) will be used to supply informetion on gamma fields end intograted dose attributable to cll causos, (See Tab A-5 for results). The dose results vill be used for the detorminetion of: (1) washdown effectiveness in reducing over-211 cosego; (2) magnitude of dose, to be used for ostimations of hazgarc by tho Militery Eveluctions Group. The dose rate results are sterting points for supplenontery calculetions. sp. Lou's FRC 3.1.3 Dotcrmination of Gamma Raciction Fiel¢e, at Various Wocthorside Locetions snd Tires, attributable to the Doposit of Conteminent on Neathersido Surfaces By subtracting the effect attributable to the envelop- ing neCiun (results of Tab 4-4) from the effect attributable to all ceusos (rosults of Tab 4-5) for all weatherside stations (Sco Tab A=3), the offect attributable to deposited contaminent is obtrincd, ° (Sco ee) 59