Regulatory Guide 8.5

Immediate Evacuation Signal

ML13350A230
Person / Time
Issue date:	02/16/1973
From:	US Atomic Energy Commission (AEC)
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References
RG-8.005
Download: ML13350A230 (1)

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2/16/73 U.S. ATOMIC ENERGY COMMISSION

REGULATORY

DIRECTORATE OF REGULATORY STANDARDS

GUIDE

REGULATORY GUIDE 8.5 IMMEDIATE EVACUATION SIGNAL

A. INTRODUCTION

October .3, 1967. The standard defines the characteristics of an immediate evacuation alarm systcm.

Section 70.24 of 10 CFR Part 70 requires criticality detection and alarm systems in any area containing

C. REGULATORY POSITION

special nuclear material when the licensee is authorized to possess more than 500 grams of U-235, 300 grams of The characteristics of an immediate evacuation Pu, or 300 grams of U-233. This guide defines the signal described in ANSI N2.3.1967, "Immediate characteristics of an acceptable audible alarm for use in Evacuation Signal for Use in Industrial Installations this and other instances where prompt, complete Where Radiation Exposure May Occur," are generally evacuation is required to prevent serious injury from acceptable for use wherever such a system may be radiation exposure. needed or required, subject to the following:

B. DISCUSSION

1. The minimum duration of the signal should be sufficient to ensure evacuation and permit United States of America Standards Institute implementation of access control.

Subcommittee N2.1, Ionizing Radiation Symbols, Color Codes and other Identifying or Warning Devices, 2. Within a given facility or plant, the unique signal prepared standard N2.3-19671 which was approved by described in N2.3-1967 should be consistent if used in the United States of America Standards Institute on more than one location.

'The United States of America Standards Institute became 3. In some cases, plant design features or operating the American National Standards Institute, Inc., in 1969. Copies conditions may require alarms different from that of ANSI N2.3-1967 may be obtained from the American National Standards Institute, Inc., 1430 Broadway, New York, described in the standard. This determination will be New York 10018. made on an individual basis.

USAEC REGULATORY GUIDES Copies of published guide-- may be obtained by rerust Indicating the divisions desired to the US. Atomic Energy Commission, Washlngton, D.C. 20545, Rogulatory Guidueare issued to describe Snd mtkre available to the public Atltetion: Director of Regulatory Standards. Comments arid suggestiornt fOr methods acceptable to the AEC Regulatory staff of implementing Stcilsic Patis of . Imptovementl In these guidet ate Icourrd anid IhouJld be Sin to thesecretary the Commissions regulations, to delineate teoniques used by the stall in of the Commission. US. Atomic Energy Commission. Washington, D.C. 20545.

evaluating Specific probltms or postulated accidents. or to provide guidance to Attention: Chief. Public Proceedings Stiff.

applicannt. Regulatory Outdes ar*,not substitutas for regulationt and complience with them is not requited. Methods and tolutlons dilferent from those set out in The guides are issued in the tollowing ten broad divisions:

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2. Reseach and Test Reactors 7. TranspOrtation .

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