ANSI N42.54:2018 pdf download.Instrumentation and Systems for Monitoring Airborne Radioactivity.
ANSI N42.54 encompasses monitoring all types of airborne radioactivity including aerosols, noble gases, iodines, and tritiurn in the workplace. in effluent, and in the environment. This standard includes initial design, manufacture, mini mum performance, performance testing, calibration, and maintenance requirements. This standard covers both real-time monitors and air samplers.
1.2 Purpose
The purpose of this standard is to integrate the relevant materials from ANSI N42.17B, ANSI N42.l8, ANSI N42.30, and ANSI N323C into a single standard. The intended users would be government and commercial facilities having the potential for airborne radioactivity.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must he understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
ANSI N42. 17B, Performance Specifications for Health Physics Instrumentation—Occupational Airborne Radioactivity Monitoring Instrumentation. American National Standard.
ANSI N42. 18, Specification and Performance of On-site Instrumentation for Continuous Monitoring Radioactivity in Effluents.
ANSI N42.22, American National Standard Traceability of Radioactive Sources to NIST and Associated Instrument Quality Control.
3. Definitions
For the purposes of this document, the following terms and definitions apply. Terms not defined in this list shall be taken to agree with the IAEA Safety Glossary (IAEA 2007) or with 10 CFR 20.1003 definitions.
acceptance tests: A contractual test to prove to the purchaser that an instrument meets conditions of its specification.
accuracy: A lack of systematic bias in a measured value that is independent of the dispersion or precision from sequential measurements.
activity median aerodynamic diameter (AMAD): Fifty per cent of the activity in the aerosol is associated with particles of aerodynamic diameter greater than the AMAD.
aerosol: Airborne particulate matter that may be either solid or liquid as a colloidal suspension in air. air: The mixture of gasses filling a local environment of interest.
alarm: Audible or visual indication of measurand that trips the set point. NOTE—May be local and/or remote.13
analyte: The radionuclide being monitored; also known as the measurand.
assay: A quantitative measure of a physical quantity. typically material activity.atmosphere: The air or volume of gas in which measurement is made.
bulk stream: The air flow in a stack or duct, as opposed to the sample flow rate.
calibration: Comparison with possible adjustment of a measurement system to agree with the conventionally true value for select points in the range.ANSI N42.54 pdf download.