General Provisions

DOE-STD-3022-98

Airfow ResistanceAn 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 of DOE Standard

DOE-STD-3020-97). Note: The initial airflow resistance of a new filter serves as an

index of the filter' potential loading capacity.

Approved Test AerosolParticle-generating materials approved by DOE for test

activities at a DOE HEPA Filter Test Facility (FTF). Test aerosols currently approved by

the DOE for tests conducted in a DOE FTF are di-octyl phthalate (DOP), also known as

DEHP, and di-octyl sebacate (DOS), also known as DEHS.

Filter Test Facility (FTF)A facility accepted by the DOE specifically to conduct quality

assurance tests of HEPA filters.

High Efficiency Particulate Air (HEPA) FilterA throwaway, extended-media, dry type

filter with a rigid casing enclosing the full depth of the pleats. The filter shall exhibit a

minimum efficiency of 99.97% when tested at an aerosol diameter of 0.3 micrometers

aerodynamic diameter. The maximum airflow resistance shall be as specified in

Section 5.2, Table 1 of DOE Standard DOE-STD-3020-97.

Nuclear FacilityNuclear 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.

PenetrationThe downstream test aerosol concentration, expressed as a percentage

of the upstream test aerosol concentration.

Preparing ActivityThe DOE organization responsible for issuance and interpretation

of this standard.

4.0

GENERAL PROVISIONS

This standard is applicable to all HEPA filters defined as performance Type B filters in

the Institute of Environmental Sciences publication "HEPA and ULPA Filters,"IES-RP-