Foreword?(This Foreword is not a part of ANSI N320-1979@ American National Standard Performance Specifications for Reactor Emergency Radiological Monitoring Instrumentation.)This standard was prepared under the joint sponsorship of the American National Standards Committee N42 on Radiation Instrumentation and the American National Standards Committee N13 on Radiation Protection. The members of both N42 and N13 reviewed and approved this standard.The performance specifications herein were developed by Battelle Northwest Laboratory through collaboration with principal manufacturers and industry as well as with acknowledged experts in principal government laboratories. The work was performed under USAEX contract.At the time it approved this standard@ the American National Standards Committee on Radiation Instrumentation had? the following personnel:Louis Costrell@ Chairman D. C. Cook@ Recording Secretary Organization Represented Name of RepresentativeAmerican Chemical Society VacantAmerican Conference of Governmental Industrial Hygienists Jesse LiebermanAmerican Industrial Hygiene Association VacantAmerican Nuclear Society F. W. ManningAmerican Society of Mechanical Engineers P.E. GreenwoodAmerican Society of Safety Engineers VacantAtomic Industrial Forum VacantHealth Physics Society J. B. Horner KuperRobert L. Butenhoff (Alt)Institute of Electrical and Electronics Engineers Louis CostrellD. C. Cook (Alt)P. J. Spurgin (Alt)J. Forster (Alt)Instrument Society of America M. T. SlindJ. E. Kaveckis (Alt)Manufacturing Chemists Association VacantNational Electrical Manufacturers Association Theodore HamburgerOak Ridge National Laboratory Frank W. ManningD. J. Knowles (Alt)Scientific Apparatus Makers Association VacantUS Department of the Army@ Materiel Command Abraham E. CohenUS Department of Commerce@ National Bureau of Standards Louis CostrellUS?Civil Defense?Preparedness Agency Carl R. Siebentritt@ Jr?US Naval Research Laboratory David C. CookMembers-at-Large J. G. BellianO. W. BilharzS. H. HanauerJohn M. Gallagher@ JrVoss A. MooreR. F. SheaR. J. VallarioThe American National Standards Committee N13 on Radiation Protection@ had the following representative at the time of approval:John Poston@ Chairman R. J. Burk@ SecretaryOrganization Represented Name of RepresentativeAmerican Chemical Society Ira B. WhitneyAmerican Conference of Governmental Industrial Hygienists D. E. Van FarroweAmerican Industrial Hygiene Association H. W. SpeicherW. D. Kelly (Alt)American Insurance Association Karl H. CarsonAmerican Mutual Insurance Alliance William J. UberAmerican Nuclear Society Eric T. ClarkeAmerican Occupational Medical Association William W. Burr@ JrAmerican Public Health Association Simon KinsmanGerald S. Parker (Alt)American Society of Mechanical Engineers Monte HawkinsAmerican Society for Testing and Materials L. B. GardnerJ. H. Bystrom (Alt)A. N. TschaecheAssociation of State and Territorial Health Officers Sherwood DaviesAtomic Industrial Forum James E. SohngenElectric Light and Power Group Marvin K. SullivanGordon A. Olson?(Alt)Environmental Protection Agency David S. SmithHealth Physics Society Vernon ChilsonJohn J. Ferry (Alt)Institute of Electrical and Electronics Engineers@ Inc C. D. WilkinsonInstitute of Nuclear Materials Management Kenneth G. OkolowitzInternational Association of Governmental Labor Officials Jacqueline MessiteFrank J. Bradley (Alt)International Brotherhood of Electrical Workers Paul R. ShoopManufacturing Chemist Association@ Inc P. W. McDanielPaul Estey (Alt)National Bureau of Standards Thomas P. LoftusNuclear Regulatory Commission Walter CoolUranium Operators Association L. W. SwentR. T. Zittling (Alt)U.S. Department of Labor John P. O'NeillG. Walker Daubenspeck (Alt)U.S. Department of Energy Edward J. VallarioU.S. Public Health Service Richard F. BoggsGail D. Schmidt (Alt)Individual Members William O. ChatfieldHugh F. HenryRemus G. McAllisterThomas PhilbinThe American National Standards joint subcommittee N13 and N42@ Working Group 6@ which was responsible for developing this standard had the following membership:Edward J. Vallario@ ChairmanJoseph G. Bellian*Lyle A. Carter*Vernon T. ChilsonWalter S. CoolRonald L. KathrenJack M. SelbyRobert W. Van Wyck*ConsultantScopeThis standard defines@ for various types of instrumentation@ the essential performance parameters@ and general placement for monitoring the release of radionuclides associated with a postulated serious accident at a reactor facility. This standard does not specify which of the instruments or systems are required nor does it consider the number or specific locations of such instruments. This standard also does not address single failure criteria associated with nuclear safety instrumentation. For the purpose of this standard@ the predominant consideration in the assessment of radiation emergencies is the measurement of fission products promptly enough to permit timely emergency decisions to be made.Where instruments utilized for routine operations fulfill the criteria herein@ they need not be duplicated in order to have separate emergency instrumentation. Dual purpose instrumentation must meet the requirements of this standard.