Regulatory Guide 3.2
| ML003740241 | |
| Person / Time | |
|---|---|
| Issue date: | 01/31/1973 |
| From: | Office of Nuclear Regulatory Research |
| To: | |
| References | |
| RG-3.2 | |
| Download: ML003740241 (1) | |
A. INTRODUCTION
10 CFR Part 20, "Standards for Protection Against Radiation", specifies permissible concentrations in air and water above natural background in restricted and unrestricted areas which may result from the possession, use and transfer of licensed radioactive material by any licensee. It also provides that licensees, in addition to complying with the requirements set forth in Part 20,
make every reasonable effort to maintain radiation exposures, and releases of radioactive materials in effluents to unrestricted areas, as far below the limits specified in Part 20 as practicable (§20.1(c)).
High efficiency particle filters and other types of air-cleaning devices are installed in the air-cleaning systems of nuclear facilities to remove particulate matter from process air or gas streams. In order to ensure that the requirements of 10 CFR Part 20 are met, users of these systems should assess the performance of installed filters, or more specifically, of the ertire system and locate damaged filters or other leakage paths. This regulatory guide describes a method of assessng the overall efficiency of air-cleaning systems containing devices for removal of particles acceptable to the AEC
regulatory staff.
B. DISCUSSION
Subcommittee NI01-7, Radiation Waste Management, of the American National Standards Institute Standards Committee on Atomic Industry Facility Design, Construction, and Operating Criteria, NI01, has developed a standard presenting a test method to provide a uniform basis for assessing the filtration efficiency of systems containing one or more particulate air-cleaning devices.
1/8/73 IDE
The in-place test method measures the particle-removal efficiency of the system. The installed air-cleaning device, or devices when more than one is used in a system, is confronted with an aerosol of DOP
(dioctyl phthalate) of proper particle size.
The concentration of the aerosol is measured before and after the device(s)
by means of light-scattering, photometric or other suitable techniques. The overall system fdtration efficiency is then calculated from the two aerosol concentration values. The purpose of the test is to determine the efficiency of the system in such a manner that any penetration of the test aerosol through the device(s) or any leakage of the test aerosol around the device(s) is included in the results. The standard does not specify performance criteria for the purpose of evaluating systems for specific service conditions. This standard was approved by the American National Standards Institute (ANSI) on February 16,
1972 and designated ANSI N 101.1-1972.
C. REGULATORY POSITION
The test method contained in ANSI N101.1-1972
"American National Standard - Efficiency Testing of Air-Cleaning Systems Containing Devices for Removal of Particles," 1 constitutes a generally acceptable procedure for assessing the filtration efficiency of systems containing one or more particulate-air cleaning devices.2
'Copies may be obtained from the American institute of Chemical Engineers, United Engineering Center, 345 East 47th Street. New York, N.Y. 10017.
2In equations 3 and 5, X, should be corrected to X and in equation S, the entire expression on the right hand side of the equality alp should be raised to the one-half power instead of the first power.
USAEC REGULATORY GUIDES
Copres of pubished pJ.dss may be ottained by requet indicating the drvito0n dissrtld to the US. Atomic Ewirgvy Commisson. Wrlunt-on. OLC. 20645.
Regulalory Guides ae iuued 1o describe ind mike availab1l to the public Anorevson: Owtsior of Regilatory Standlrds Comments and sugsgattrons for methods acceptable to the AEC Regulatory staff of .mfmermtsniq seschc pens of imtprovemairts it the"
uldSe ot
.riouauqed and should be sentt to the Sotretat the Comm*ss,on's reglulatson
s. to delnt e
tebchniqus used by the staff in of the Cometimeon , U.S. AtoUsc Energy Commis,oin. Wahington. D.C. 20645.
.vl.uatofno specifc problems of poltulated GMcWn.
or to provide guidence So Artem*ng.: Chif. Public ProcaidinflsStaff applicnts. Re*guitory Guilds airet sof batitute; for regulatiOns anId co*rtplWl with them 4 nof required. Metho ad solutlorw diffaeret from thoso uo t it The quides a*e imued in the follontorr ton brood divisOins t he guide$ ii1 Doe acceptable if they Provide a binste for the 01 ld feip eq"st to the sutsne ori tot¢unlftCE of *h
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1. Poem Komolri
. Products Re¢t.2.
Resae*nd Test Reactors
7 Transportation
3. Fuels fid Materiels Failities
8 Occupetion*l Health Published guidas will be revlied pe*sodically. o efrooprute. to ac*wnmodete"
4 Enwonmertal and Sit.ng
9 Anti1truat Revnev comments end to reflect n* w ,1rrto*rti*ont or e*xt*ar*-e.
S. Matrs*ols and Plant Protetclt n
10
General j
U.$. ATOMIC ENERGY COMMISS8ION
REGULATORY GU
DIRECTORATU Of1 R1USLATORY STANDARDS
REGULATORY GUIDE 3.2 EFFICIENCY TESTING OF AIR-CLEANING SYSTEMS CONTAINING
DEVICES FOR REMOVAL OF PARTICLES