Regulatory Guide 3.2

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Efficiency Testing of Air-Cleaning Systems Containing Devices for Removal of Particles
ML12184A010
Person / Time
Issue date: 01/31/1973
From:
Office of Nuclear Regulatory Research
To:
References
RG-3.002
Download: ML12184A010 (1)


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1/8/73 U.S. ATOMIC ENERGY COMMISSION

REGULATORY

DIRECTORATE OF REGULATORY STANDARDS

GUIDE

REGULATORY GUIDE 3.2 EFFICIENCY TESTING OF AIR-CLEANING SYSTEMS CONTAINING

DEVICES FOR REMOVAL OF PARTICLES

A. INTRODUCTION

The in-place test method measures the particle-removal efficiency of the syste

m. The installed

10 CFR Part 20, "Standards for Protection Against air-cleaning device, or devices when more than one is Radiation", specifies permissible concentrations in air used in a system, is confronted with an aerosol of DOP

and water above natural background in restricted and (dioctyl phthalate) of proper particle size. The Unrestricted areas which may result from the possession, concentration of the aerosol is measured before and use and transfer of licensed radioactive material by any after the device(s) by means of light-scattering, licensee. It also provides that licensees, in addition to photometric or other suitable techniques. The overall complying with the requirements set forth in Part 20, system filtration efficiency is then calculated from the make every reasonable effort to maintain radiation two aerosol concentration values. The purpose of the exposures, and releases of radioactive materials in test is to determine the efficiency of the system in such effluents to unrestricted areas, as far below the limits a manner that any penetration of the test aerosol specified in Part 20 as practicable (§20.1(c)). through the device(s) or any leakage of the test aerosol around the device(s) is included in the results. The High efficiency particle filters and other types of standard does not specify performance criteria for the air-cleaning devices are installed in the air-cleaning purpose of evaluating systems for specific service systems of nuclear facilities to remove particulate matter conditions. This standard was approved by the American from process air or gas streams. In order to ensure that National Standards Institute (ANSI) on February 16, the requirements of 10 CFR Part 20 are met, users of 1972 and designated ANSI NI01.1-1972.

these systems should assess the performance of installed filters, or more specifically, of the entire system and

C. REGULATORY POSITION

locate damaged filters or other leakage paths. This regulatory guide describes a method of assessing the The test method contained in ANSI N101.l-1972 overall efficiency of air-cleaning systems containing "American National Standard - Efficiency Testing of devices for removal of particles acceptable to the AEC Air-Cleaning Systems Containing Devices for Removal of regulatory staff. Particles,"' constitutes a generally acceptable procedure for assessing the filtration efficiency of systems

B. DISCUSSION

containing one or more particulate-air cleaning devices. 2 Subcommittee NI01-7, Radiation Waste Management, of the American National Standards Institute Standards Committee on Atomic Industry Copies may be obtained from the American Institute of Chemical Engineers, United Engineering Center, 345 East 47th Facility Design, Construction, and Operating Criteria, Street, New York, N.Y. 10017.

N 101, has developed a standard presenting a test method to provide a uniform basis for assessing the filtration -In equations 3 and 5, X1 should be corrected to Xi and in equation 5, the entire expression on the right hand side of the efficiency of systems containing one or more particulate equality sign should be raised to the one-half power instead of air-cleaning devices. the first power.

USAEC REGULATORY GUIDES Copies of published guides may be obtained by request indicating the divisions desired to the US. Atomic Energy Commission, Washington, D.C. 20545, Regulatory Guides are issued to describe and make available to the public Attention: Director of Regulatory Standards. Comments and suggestions for methods acceptable to the AEC Regulatory staff of implementing specific parts of improvements in these guides are encouraged and should be sent to the Secretary the Commission's regulations, to delineate techniques used by the staff in of the Commission, U.S. Atomic Energy Commission. Washington, D.C. 20545, evaluating specific problems or postulated accidents, or to provide guidance to Attention: Chief, Public Proceedings Staff.

applicants. Regulatory Guides are not substitutes for regulations and compliance with them is not required. Methods and solutions different from those set out in The guides are issued in the following ten broad divisions:

the guides will be acceptable it they provide a basis for the findings requisite to the issuance or continuance of a permit or license by the Commission. 1. Power Reactors

6. Products

2. Research and Test Reactors

7. Transportation

3. Fuels and Materials Facilities 8. Occupational Health Published guides will be revised periodically, as appropriate, to accommodate 4. Environmental and Siting 9. Antitrust Review commetnts and to reflect new information or experience. 5. Materials and Plant Protection 10. General