Document: NUREG-1555
Document ID: d62aa925-a135-4ee2-ba79-f6e4292edb17
Document Type: esrp
Title: RADIOLOGICAL MONITORING
Source: NUREG-1555
Source URL: https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1555/initial/
Revision Date: 2007-10
Chapter: 6
Section ID: 6.2
CFR Part: 
CFR Title: 

Content:
obtain background information. If it is not practical to establish control locations in accordance with the distance and wind direction criteria, other sites that provide valid background data may be substituted. Table 6.2-2. Radiological Environmental Monitoring Program (contd) Exposure Pathway and Sample Number of Samples(a) and Locations Sampling and Collection Frequency(a) Type and Frequency of Analysis October 1999 6.2-9 NUREG-1555 (f) Regulatory Guide 4.13, Rev. 1, Performance, Testing, and Procedural Specifications for Thermoluminescence Dosimetry: Environmental Applications (NRC 1977), provides minimum acceptable performance criteria for thermoluminescence dosimetry (TLD) systems used for environmental monitoring. One or more instruments, such as a pressurized ion chamber, for measuring and recording dose rate continuously may be used in place of, or in addition to, integrating dosimeters. For the purposes of this table, a thermoluminescence dosimeter may be considered to be one chip, and two or more chips in a packet may be considered as two or more dosimeters. (g) The “upstream sample” should be taken at a distance beyond significant influence of the discharges. The “downstream” sample should be taken in an area beyond but near the mixing zone. “Upstream” samples in an estuary must be taken far enough upstream to be beyond the plant influence. (h) Generally, saltwater is not sampled except when the receiving water is used for recreational activities. (I) Composite samples should be collected with equipment (or equivalent) that is capable of collecting an aliquot at time intervals that are very short (e.g., hourly) relative to the composition period (e.g., monthly). (j) Groundwater samples should be taken when this source is tapped for drinking or irrigation purposes in areas in which the hydraulic gradient or recharge properties are suitable for contamination. (k) If harvest occurs more than once a year, sampling should be performed during