np 2.2 To obtain information necessary to determine the radiological 2.3 To obtain information regarding the nature of the contaminant hazards in interior compartments as a result of the inhalation of airborne contamination in ship spaces. to which the ships are exposed in order tint the observed iuterior hazards may be susceptible to interpretation. 2.4, To obtain information necessary to determine the effects of standard components of boiler and ventilation systems on the hazards listed above, so that qualitative extrapolations to other systems can be made. 2.5 To obtain information necessary to determine the over-all effectiveness of various protective devices in reducing the extent of the radiological hazards from ventilation systems. 3. Tasks and Plan of Attack 3.1 Radiation from Ventilation and Boiler Air Ducts Existing firerooms and modified boiler air systems on TRANSIT ABLE and TRANSIT BAKER will be documented with measuring devices. Typical ventilation systems and devices will be installed and instrumented in No. 3 Hold of each ship as shown in Tab F~1, Six systems (Conditions I through VI) will be installed on TRANSIT BAKER. Condition II only will be installed on TRANSIT ABLE to measure the effect of the washdown countermeasure on an operating ventilation system. Arrangements are as shown in Tab F-1 and detailed working plans listed therein. Ducts 3.1.1 Distribution of Deposited Radioactive liaterial Throughout information desired is: ae Representation of activity as a function of position and distance in ducts. walls of ducts. b. Absolute magnitude of activity deposited on inside ST, LOUIS He Item a will be obtained on Rfél-day by means of a survey of exterior surfaces of ducts with beta and gamma survey instruments. Item >will be obtained by installing small rectangular sampling surfaces over rectangular holes cut from the ducts in various locations prior to test. These sampling surfaces will be removed on R¢l-day for counting, decay measurements, and readiochemical analysis. The proper location of these sampling surfaces will be determined by pre-test experimental work at USNRDL using a 1/6-scale boiler system and a full-scale ventilation system. 3 qn 92