Definitions - std30250008

DOE-STD-3025-99

2.2

Department of Defense Military (MIL) Specifications

MIL-F-51079 - Filter, Medium, Fire Resistant, High Efficiency

2.3

National Consensus Standards

2.3.1

American Society of Mechanical Engineers (ASME)

ASME AG-1 Code, section FC - HEPA Filters

ASME 510-1980 - Testing of Nuclear Air-Cleaning Systems

2.3.2

Institute of Environmental Sciences, Mt. Prospect, Illinois

IES-RP-CC-001.3 - Recommended Practices for HEPA Filters

2.3.3

Underwriter Laboratories

UL 586 - Standard for High Efficiency, Particulate, Air Filter Units

DEFINITIONS

3.1

Acceptance Test

Inspection and testing of a nuclear grade filter to verify certain characteristics or

properties which determine acceptance or rejection of that filter.

3.2

Airflow Resistance

An index of the energy required to maintain airflow through a filter. Airflow resistance

is measured in terms of the air pressure difference (pressure drop) across a filter at a

specified flow rate (e.g. see section 5.2.2, Table-1, Standard DOE-STD-3020-97).

Note: The initial airflow resistance of a new filter serves as an index of the filter's

potential loading capacity.

3.3

Count Geometric Mean Diameter (dg)

ln dg = 3 ni ln di

where ni = the number of particles in the ith size category,

di = diameter of particles in the ith size category, and

N = 3 ni = the total number of particles.