NDLI: A Self-Checking Radiation Monitor

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A Self-Checking Radiation Monitor

Content Provider	IEEE Xplore Digital Library
Author	Speh, K. C. Landauer, W. E.
Copyright Year	1955
Abstract	A self-checking system of circuits is expected to provide a new high in operational reliability for the set of radiation monitors described. Developed under sponsorship of the Bureau of Ships, these monitors can readily be adapted for application in any nuclear installation where radiation monitoring must be performed. Three basic channels are provided to measure accurately the gamma radiation in the range from 1 to 1000 mr/hr, the thermal neutron flux from 20 to 20,000 thermal neutrons/cm2 sec, and the air-particle concentration from 10-9 to 10-6, ¿C/cm3 or from 10-8 to 10-5 ¿C/cm3. Checking of each channel is performed by periodically (and automatically) placing a small radioactive source next to the detecting element in each channel. This results in a signal near the maximum range of each channel. During such checks, the alarm-indicating circuit is disconnected and the channel output applied to a comparator circuit; there will result a "circuit fault" indication if any part of the signal-handling or the checking circuits has failed. The philosophy and the limitations of the checking scheme are discussed. The calibration of the air-particle channel is in terms of a specific isotope. Calibrations for other isotopes can be prepared. Shielding is applied to the detecting element in the air-particle channel in order to minimize counts due to the ambient gamma background. The gamma detector has shielding to equalize its response to radiation at energies between 80 kev and 2 mev.
Starting Page	19
Ending Page	25
Page Count	7
File Size	4035210
File Format	PDF
ISSN	00962015
Volume Number	4
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1957-03-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radiation monitoring Neutrons Calibration Isotopes Gamma ray detection Gamma ray detectors Marine vehicles Gamma rays Circuit faults Chemical elements
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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