Radiological Surveys and Data Trending - Continued

DOE-STD-1128-98

Guide of Good Practices for Occupational Radiological Protection in Plutonium Facilities

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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