Low-Flow Alternative Test System

DOE-STD-3025-99

3.10

Low-Flow Alternative Test System

A test method to evaluate penetration characteristics of HEPA filters with design air flow

rates of 250 cfm or less. The measurement technique is the same as that for the High-

Flow Alternative Test System.

3.11

Nuclear Facility

Nuclear Facility - Nuclear facility means reactor and nonreactor nuclear facilities. This

definition is taken from 10 CFR 830, Nuclear Safety Management, Section 830.3,

Definitions. "Nonreactor nuclear facility" as well as "reactor" are defined in detail in

this section of the Code of Federal Regulations.

3.12

Nominal Airflow Rating

The flow rate at which HEPA filters are identified by the manufacturer and confirmed by

the FTF. Nominal airflow ratings for various size filters are listed in DOE-STD-3020-97

(Section 5.2.2, Table 1).

3.13

Operating Technician

An individual who has been trained and qualified in accordance with Section 9 of this

standard to inspect and test HEPA filters.

3.14

Particle Collection Efficiency

For FTF activities, the measure of filter effectiveness, expressed as a percent, determined

from the equation:

E = 100 - P

where P = percent penetration

3.15

Penetration

The downstream test aerosol concentration, expressed as a percentage of the upstream

test aerosol concentration.