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Radioactive dust in the air

Journal Article:

Abstract

An electric precipitator is used to collect dust in the air because its collection efficiency for radioactive substances is up to 10 times that of the impactor of filter-paper types. About 10 cu m of air is filtered during 5 hours, and the trapped dust is measured more than 24 hours after collection to avoid the influence of naturally active substances. The average radioactivity of the air is approximately 10/sup -16/ c/cc. During the period of observation 4 peaks occurred. The dates and maximum levels of artificial activity, respectively, are November 4 to 10, 1954, 1.2 x 10/sup -7/ uc/l; April 11 to 13, 1955, 4.3 x 10/sup -8/ uc/l; November 25 to 28, 1955, maximum unknown; and March 22 to 25, 1956, 1.- x 10/sup -7/ uc/l. The presumed dates and places of detonation corresponding to the peaks are October 31, 1954 northwest of Japan; March 29, 1955, Nevada, US; November 22, 1955, near L. Baikal, USSR; and March 13 to 15, 1956 unknown.
Authors:
Publication Date:
Jan 01, 1956
Product Type:
Journal Article
Reference Number:
EDB-81-011958
Resource Relation:
Journal Name: Pap. Meteorol. Geophys. (Tokyo); (Japan); Journal Volume: 7:1
Subject:
54 ENVIRONMENTAL SCIENCES; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; AIR; RADIATION MONITORING; DUSTS; RADIOACTIVITY; JAPAN; NUCLEAR EXPLOSION DETECTION; NEVADA TEST SITE; USSR; AIR SAMPLERS; FILTRATION; NATURAL RADIOACTIVITY; NUCLEAR EXPLOSIONS; ASIA; DETECTION; EASTERN EUROPE; EQUIPMENT; EUROPE; EXPLOSIONS; FLUIDS; GASES; LABORATORY EQUIPMENT; MONITORING; SAMPLERS; SEPARATION PROCESSES; 500300* - Environment, Atmospheric- Radioactive Materials Monitoring & Transport- (-1989); 450300 - Military Technology, Weaponry, & National Defense- Nuclear Explosion Detection
OSTI ID:
6857813
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: PMGTA
Submitting Site:
TIC
Size:
Pages: 34-41
Announcement Date:

Journal Article:

Citation Formats

Yano, N. Radioactive dust in the air. Japan: N. p., 1956. Web.
Yano, N. Radioactive dust in the air. Japan.
Yano, N. 1956. "Radioactive dust in the air." Japan.
@misc{etde_6857813,
title = {Radioactive dust in the air}
author = {Yano, N}
abstractNote = {An electric precipitator is used to collect dust in the air because its collection efficiency for radioactive substances is up to 10 times that of the impactor of filter-paper types. About 10 cu m of air is filtered during 5 hours, and the trapped dust is measured more than 24 hours after collection to avoid the influence of naturally active substances. The average radioactivity of the air is approximately 10/sup -16/ c/cc. During the period of observation 4 peaks occurred. The dates and maximum levels of artificial activity, respectively, are November 4 to 10, 1954, 1.2 x 10/sup -7/ uc/l; April 11 to 13, 1955, 4.3 x 10/sup -8/ uc/l; November 25 to 28, 1955, maximum unknown; and March 22 to 25, 1956, 1.- x 10/sup -7/ uc/l. The presumed dates and places of detonation corresponding to the peaks are October 31, 1954 northwest of Japan; March 29, 1955, Nevada, US; November 22, 1955, near L. Baikal, USSR; and March 13 to 15, 1956 unknown.}
journal = {Pap. Meteorol. Geophys. (Tokyo); (Japan)}
volume = {7:1}
journal type = {AC}
place = {Japan}
year = {1956}
month = {Jan}
}