Nuclear facilities are required to install a Radiation Monitoring System (RMS) that monitors contaminated Airborne particles and radioactive gases emitted from stacks and ducts. The performance of the sampling system (nozzle, transport line, and sampling location) for RMS is essential.

Confirmation of the installation location suitability of sampling nozzles and transport systems for accurate delivery of gases and particles must be verified for public confidence and safety.

1. Sampling Location Verification Test

Uniformity of flow angle , velocity distribution, particle concentration distribution, tracer gas concentration distribution

2. Sampling Nozzle Verification Test

Nozzle transmission and aspiration ratio

3. Sampling Transport System Verification Test

Transport system deposition loss ratio

Applicable Standards

ANSI/HPS N13.1 / KEPIC-NRB 6000 / ISO 2889