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SUMMARY:Noble Gases Release after Underground Nuclear Explosions
DTSTART;VALUE=DATE-TIME:20190624T134500Z
DTEND;VALUE=DATE-TIME:20190624T140000Z
DTSTAMP;VALUE=DATE-TIME:20210727T021122Z
UID:indico-contribution-261@conferences.ctbto.org
DESCRIPTION:Speakers: Yurii Dubasov (Khlopin Radium Institute)\nUndergroun
 d nuclear explosion may be follow of the noble gases release. 493 undergro
 und nuclear tests and explosions of different purposes and in the differen
 t rocks were conducted in the Soviet Union over period in 1961-1990. A tot
 al of 340 underground nuclear tests were conducted at the Semipalatinsk Te
 st Site. 179 explosions (52.6%) among them were classified as these of com
 plete containment\, 145 explosions (42.6%) as explosions with weak release
  of radioactive noble gases (RNG)\, 12 explosions (3.5%) as explosions wit
 h nonstandard radiation situation. Thirty-nine nuclear tests had been cond
 ucted at the Novaya Zemlya Test Site\; six of them ? in shafts (vertical b
 oreholes) and 33 tests in the horizontal tunnels. In 14 tests (36%) there 
 were no RNG release. Twenty-three tests have been accompanied by RNG relea
 se into the atmosphere without residual contamination. Nonstandard radiati
 on situation occurred in two tests. In incomplete containment explosions b
 oth early-time RNG release (up to ~1 h) and late-time release from 1 to 28
  h after the explosion were observed. Sometimes gas release took place for
  several days\, and it occurred either through tunnel portal or epicentral
  zone\, depending on atmospheric air temperature and pressure. Figures of 
 stemming complexes will presented.\n\nhttps://conferences.ctbto.org/event/
 3/contributions/261/
LOCATION:Hofburg Forum
URL:https://conferences.ctbto.org/event/3/contributions/261/
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