Radiological Surveys and Data Trending cont'd

DOE-STD-1128-98

-- To provide a basis for evaluating potential worker exposure on a job

and in ALARA preplanning.

-- to provide a baseline for trend analysis, investigation, and correction

of unusual conditions.

-- to track the status of jobs (including identification of good practices)

and to detect departures from good operating procedures and/or the

failure of radiation controls.

-- to identify the origin of radiation exposures in the plant by location,

system, or component.

Health physics personnel should post the results of radiation surveys or

survey maps at the entrance to all permanent radiation areas, high

radiation areas, and very high radiation areas. The results should be

posted in the form of a survey map so that personnel can be aware of the

locations of higher and lower levels of radiation within the area.

A survey data trending program should be conducted; to indicate the

continuing effectiveness of existing control; to warn of deterioration of

control equipment or effectiveness of operating procedures; to show

long-term variations in radiation levels; and to identify and correct

improper radiation work practices.

Health physics should perform trend analyses on all permanent radiation,

high radiation, and very high radiation areas. At a minimum, one

complete survey record should be evaluated and included in the trend

analysis program for each survey required to be performed by the facility

routine control program.

Health physics should use the facility reporting system to identify

discrepancies and abnormal trends and should summarize the data review

results in their monthly reports to the Radiological Protection Manager.

Survey data trends should be investigated when either:

-- an upward trend in general area radiation level occurs, causing a

significant increase.

-- an abrupt change in radiation level occurs that cannot be directly

correlated to normal activities.

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