Обзор ядерных аварий с возникновением СЦР
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149
è ïðîâîäèëèñü ñ öåëüþ äàëüíåéøåãî ïîíèìàíèÿ òåõíîëîãè÷åñêèõ àâàðèé. ÑÖÐ èíèöèèðîâàëàñü
â öèëèíäðè÷åñêèõ åìêîñòÿõ äèàìåòðîì 300 ìì è 800 ìì, íàïîëíåííûõ ðàñòâîðàìè
âûñîêîîáîãàùåííîãî óðàíà ñ êîíöåíòðàöèåé îò 48,2 ã/ë äî 298 ã/ë.  áîëüøåé ÷àñòè
ýêñïåðèìåíòîâ ðàñòâîðû ïîäàâàëèñü â åìêîñòü ñ ïîñòîÿííîé ñêîðîñòüþ äî òåõ ïîð, ïîêà âûñîòà
ñóùåñòâåííî íå ïðåâûøàëà êðèòè÷åñêîå ñîñòîÿíèå.  íåêîòîðûõ ýêñïåðèìåíòàõ èñïîëüçîâàëñÿ
íåéòðîííûé èñòî÷íèê äîñòàòî÷íîé èíòåíñèâíîñòè, ÷òîáû íà÷àëàñü âñïûøêà ìîùíîñòè, êàê
òîëüêî ñèñòåìà äîñòèãàëà êðèòè÷íîñòè, â òî âðåìÿ êàê îòñóòñòâèå òàêîãî èñòî÷íèêà â äðóãèõ
ýêñïåðèìåíòàõ ïîçâîëÿëî ñèñòåìå îêàçàòüñÿ â íàäêðèòè÷åñêîì ñîñòîÿíèè íà ìãíîâåííûõ
íåéòðîíàõ äî ðàçâèòèÿ öåïíîé ðåàêöèè, â ðåçóëüòàòå ÷åãî ïîëó÷àëñÿ áîëåå âûñîêèé ýíåðãîâûõîä.
 ïðèñóòñòâèè èñòî÷íèêà íåéòðîíîâ âåëè÷èíà ýíåðãîâûõîäà â ïèêå õîðîøî êîððåëèðîâàëà
ñî ñêîðîñòüþ ââåäåíèÿ ðåàêòèâíîñòè. Äëÿ ïåðèîäà êîðî÷å 10 ìèëëèñåêóíä óäåëüíàÿ ìîùíîñòü
â ïèêå, êàê áûëî íàéäåíî, èçìåíÿëàñü êàê îáðàòíûé ïåðèîä â ñòåïåíè 3/2, ÷òî íàõîäèòñÿ
â ñîãëàñèè ñ ïðåäñêàçàíèÿìè, îñíîâàííûìè íà ðåçóëüòàòàõ ýêñïåðèìåíòîâ KEWB
6
.
Ðåçóëüòàòîì âûïîëíåíèÿ ïðîãðàììû CRAC
5
ÿâëÿåòñÿ òàêæå ïîëó÷åíèå ïîëåçíûõ äàííûõ
î ìîùíîñòè äîçû, îæèäàåìîé âáëèçè åìêîñòåé ñ ðàñòâîðàìè, â êîòîðûõ ïðîèçîøëà ÑÖÐ (â
îòñóòñòâèå áèîëîãè÷åñêîé çàùèòû). Äëÿ öèëèíäðà äèàìåòðîì 300 ìì íà ðàññòîÿíèè 4 ì îò åãî
ïîâåðõíîñòè äîçà ñîñòàâèëà îêîëî 3 × 10
—15
Ð íà àêò äåëåíèÿ, à äëÿ öèëèíäðà äèàìåòðîì 800 ìì —
îêîëî 5 × 10
—16
Ð íà àêò äåëåíèÿ.
Àêòèâíûå çîíû ðåàêòîðà SPERT I (ðåàêòîð ãåòåðîãåííûé, çàìåäëèòåëü è îòðàæàòåëü
íåéòðîíîâ — âîäà) áûëè äâóõ îñíîâíûõ òèïîâ
93
. Òîïëèâî çîíû ïåðâîãî òèïà áûëî â ôîðìå
àëþìèíèåâî — óðàíîâûõ ïëàñòèí, êàê â ðåàêòîðå äëÿ èñïûòàíèÿ ìàòåðèàëîâ (MTR), è àêòèâíûå
çîíû ñïðîåêòèðîâàíû òàê, ÷òî â íèõ èìåëèñü ðàçíûå îáëàñòè: îò îáëàñòè ñî ñëàáûì
çàìåäëåíèåì äî áîëåå îïàñíîé îáëàñòè ñî ñëèøêîì áîëüøèì çàìåäëåíèåì. Àêòèâíàÿ çîíà
âòîðîãî òèïà áûëà ñîñòàâëåíà èç çàêëþ÷åííûõ â îáîëî÷êó ñòåðæíåé UO
2
äèàìåòðîì
ïðèáëèçèòåëüíî 10 ìì. Îáîãàùåíèå óðàíà â ýòèõ ñòåðæíÿõ ñîñòàâëÿëî 4%.
Ðàçãîíû â ðåàêòîðàõ ñ òåïëîâûäåëÿþùèìè ýëåìåíòàìè ïëàñòèí÷àòîãî òèïà øèðîêî
èçó÷àëèñü, íà÷èíàÿ ñ 1957 ãîäà, â ïîïûòêå ðàçðåøèòü ïðîáëåìû êîíñòðóêöèè àêòèâíîé çîíû
è íàéòè îãðàíè÷åíèÿ äëÿ òàêèõ ðåàêòîðîâ.  ÷àñòíîñòè, áûëè òùàòåëüíî îïðåäåëåíû ïåðèîä
è âåëè÷èíà ýíåðãèè, ìîãóùàÿ âûçâàòü ïîâðåæäåíèå. Çàòóõàíèå ïåðåõîäíîé ìîùíîñòè â ñèñòåìàõ
SPERT áîëåå ñëîæíî, ÷åì â áîëåå ïðîñòûõ ðåàêòîðàõ. Ðàçðàáîòàííàÿ ìîäåëü ó÷èòûâàåò íàãðåâ
è èçìåíåíèå ïëîòíîñòè âîäû; íàãðåâ è èçìåíåíèå ñòðóêòóðû àêòèâíîé çîíû, âêëþ÷àÿ èçìåíåíèå
ãåîìåòðèè è âûáðàñûâàíèå çàìåäëèòåëÿ èç-çà òàêèõ èçìåíåíèé; è, íàêîíåö, êèïåíèå âîäû ðÿäîì
ñ ïëàñòèíàìè è ïîòåðè çàìåäëèòåëÿ, êîãäà âîäà âûòåñíÿåòñÿ èç àêòèâíîé çîíû. Êîãäà àêòèâíàÿ
çîíà ïëàñòèí÷àòîãî òèïà áûëà ðàçðóøåíà, ðåàêòèâíîñòü, ïåðèîä, ïèê ìîùíîñòè è âûäåëåíèå
ýíåðãèè äåëåíèÿ áûëè ñóùåñòâåííî òàêèå, êàêèå áûëè ïðåäñêàçàíû. Ðàçðóøèòåëüíûé èìïóëüñ
äàâëåíèÿ ïàðà, íà÷àâøèéñÿ ãäå-òî ÷åðåç 15 ìèëëèñåêóíä ïîñëå çàâåðøåíèÿ ýíåðãîâûäåëåíèÿ çà
ñ÷åò ÑÖÐ, íå ïðåäâèäåëñÿ è, êàê ïîëàãàþò, áûë âûçâàí î÷åíü áûñòðîé ïåðåäà÷åé ýíåðãèè îò
ïî÷òè ðàñïëàâëåííûõ àëþìèíèåâûõ ïëàñòèí ê òîíêîìó ñëîþ âîäû ìåæäó ïëàñòèíàìè. Ýòà
ïåðåäà÷à, ïðîèñøåäøàÿ ïðåæäå, ÷åì èìåëî ìåñòî ñêîëüêî-íèáóäü çíà÷èòåëüíîå èçìåíåíèå
îáúåìà, è âîçíèêøåå â ðåçóëüòàòå âûñîêîå äàâëåíèå ðàçðóøèëè àêòèâíóþ çîíó. Êàæåòñÿ, ÷òî
ýòîò æå ýôôåêò ó÷àñòâîâàë â ðàçðóøåíèè ÁÎÐÀÊÑ, SPERT è SL-1.
Âòîðîé òèï àêòèâíîé çîíû SPERT I
93
(ñòåðæíè UO
2
â âîäå, îáîãàùåíèå óðàíà 4%)
èñïûòûâàëñÿ â òå÷åíèå 1963 ã. è 1964 ã. Ýêñïåðèìåíòû ïî èçó÷åíèþ ïåðåõîäíûõ ïðîöåññîâ
ñ òàêîé àêòèâíîé çîíîé ïîêàçàëè äåéñòâåííîñòü ýôôåêòà Äîïëåðà â ñàìîãàøåíèè è ñîçäàëè
îñíîâó äëÿ àíàëèçà àâàðèé ïîäîáíûõ ýíåðãåòè÷åñêèõ ðåàêòîðîâ. Äâå ïîïûòêè ðàçðóøèòü
àêòèâíóþ çîíó ïóòåì âûâîäà ðåàêòîðà íà î÷åíü êîðîòêèå ïåðèîäû (2,2 è 1,55 ìèëëèñåêóíä) áûëè
íåóäà÷íûìè.  êàæäîì ñëó÷àå ýôôåêò Äîïëåðà îêàçûâàëñÿ ýôôåêòèâíûì, è äîïîëíèòåëüíîå
ãàøåíèå ðàçâèâàëîñü ïîòîìó, ÷òî îäèí èëè äâà òîïëèâíûõ òîíêèõ ñòðåæíÿ (èç íåñêîëüêèõ ñîòåí)
òðåñêàëñÿ è âûçûâàë ëîêàëüíîå êèïåíèå. Ñ÷èòàëîñü, ÷òî òîíêèå ñòåðæíè áûëè íàñûùåíû
âîäîé ïåðåä èñïûòàíèåì.
150
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ÐÔßÖ-ÂÍÈÈÝÔ”, Àòîìíàÿ ýíåðãèÿ, òîì 85, âûï. 2, ñ. 153—158, àâãóñò 1998 ã.
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68. W. B. Lewis, “The Accident to the NRX Reactor on December 12, 1952,” Atomic Energy of
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69. W. J. Henderson, A. C. Johnson, and P. R. Tunnicliffe, “An Investigation of Some of the
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70. J. R. Dietrich, et al., “Experimental Investigation of the Self-limitation of Power During Reactivity
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71. “Reactors, Operational Power Reactors,” Nucleonics 13
13 13
13 (9), 40—45 (September 1955).
72. J. R. Dietrich, “Experimental Determinations of the Self-regulation and Safety of Operating
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73. J. R. Dietrich and D. C. Layman, “Transient and Steady State Characteristics of a Boiling Reactor,
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74. T. J. Thompson, “Chapter 11 — Accidents and Destructive Tests,” The Technology of Nuclear
Reactor Safety (The M. I. T. Press, Cambridge, MA), Vol. 1, pp. 609—610, 699 (1964).
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1717
17 (4), 106, 154—156
(April 1959).
76. C. C. Lushbaugh, “Reflections on Some Recent Progress in Human Radiobiology,” in Advances in
Radiation Biology (Academic Press Inc., New York), Vol. 3, pp. 292—293 (1969).
77. A. N. Tardiff, “Some Aspects of the WTR and SL-1 Accidents,” in Proceedings of the IAEA
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79. R. W. Miller, A. Sola, and R. K. McCardell, “Report of the SPERT I Destructive Test Program on
an Aluminum, Plate-type, Water-moderated Reactor,” Phillips Petroleum Company report
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80. D. M. Parfanovich, “Summary of Two Criticality Accidents at the Russian Research Center
Kurchatov Institute,” Idaho National Engineering and Environmental Laboratory report
INEEL/EXT-98-00409 (August 1998).
81. A. Yu. Gagarinski and V. D. Pavlov, “Water-moderated Hexagonally Pitched Lattices of
U(90%)O
2
+ Cu Fuel Rods with GD or SM Rods,” HEU-COMP-THERM-004 in International
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(September 2002).
82. D. Beninson, “Report of the Accident that Occurred to the Critical Assembly RA—2 Reactor on
September 23, 1984,” [The accident actually took place September 23, 1983], US NRC Information
Notice No. 83-66, Supplement 1 (May 1984).
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24
2424
24
(40), 1 (October 1983).
84. O. R. Frisch, et al., “Controlled Production of an Explosive Nuclear Chain Reaction,” Los Alamos
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85. F. De Hoffmann, B. T. Feld, and P. R. Stein, “Delayed Neutrons from U
235
After Short Irradiation,”
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7474
74 (10), 1330—1337 (November 1948).
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87. J. H. Kittel, M. Novick, and R. F. Buchanan, “The EBR-1 Meltdown – Physical and Metallurgical
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88. “Summary Report of HTRE No. 3 Nuclear Excursion,” General Electric Company report APEX-509
(August 1959).
89. M. E. Remley, et al., “Experimental Studies on the Kinetic Behavior of Water Boiler Type
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Program,” Transactions of the American Nuclear Society 2 (1), A Supplement to Nuclear Science
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91. D. L. Hetrick, et al., “Preliminary Results on the Kinetic Behavior of Water Boiler Reactors,” North
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35,35,
35, pp. 279—280 (November 1980).
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2 2
2 (1), 96—115 (February 1957).
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6 6
6 (4), 255—259
(October 1959).
97. S. L. Koutz, et al., “Design of a 10-kw Reactor for Isotope Production, Research and Training
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99. G. E. Hansen, “Burst Characteristics Associated with the Slow Assembly of Fissionable Materials,”
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(August 1946).
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Nuclear Science and Engineering 8
8 8
8 (6), 709—719 (December 1960).
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88
8 (6), 670—690 (December 1960).
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Reactor,” supplemental material presented at the 1959 Annual Meeting of the American Nuclear
Society (June 1959).
A-1
Ïðèëîæåíèå À
Ãëîññàðèé òåðìèíîâ ïî àâàðèÿì
ñ âîçíèêíîâåíèåì ÑÖÐ
Íåñêîëüêî ëåò íàçàä áûë ñîñòàâëåí àâòîðèòåòíûé ãëîññàðèé òåðìèíîâ ïî êðèòè÷íîñòè,
óïîòðåáëÿåìûõ â ÿäåðíîé íàóêå è òåõíèêå. Ìû ðåøèëè âêëþ÷èòü åãî â äàííûé îò÷åò öåëèêîì
êàê ïðèëîæåíèå, à íå òîëüêî òó ÷àñòü, êîòîðàÿ îòíîñèòñÿ íåïîñðåäñòâåííî ê àâàðèÿì
ñ âîçíèêíîâåíèåì êðèòè÷íîñòè. Òàêèì îáðàçîì, ìû íàäååìñÿ, ÷òî íàñòîÿùèé îò÷åò â áóäóùåì
íàéäåò åùå îäíî ïðàêòè÷åñêîå ïðèìåíåíèå êàê ñâîåîáðàçíûé ñòàíäàðò äëÿ îïðåäåëåíèé
è òåðìèíîâ.
Ïðåäëàãàåìûé íèæå Ãëîññàðèé òåðìèíîâ ïî êðèòè÷íîñòè ÿäåðíûõ óñòðîéñòâ ñîñòàâëåí
Õüþ Ïàêñòîíîì (LA-11627-MS)
3
. Äàííûé ãëîññàðèé ñîäåðæèò òåðìèíû, èñïîëüçóåìûå
â ëèòåðàòóðå ïî êðèòè÷íîñòè ÿäåðíûõ óñòðîéñòâ è ïî áåçîïàñíîñòè ïðè âîçíèêíîâåíèè ÑÖÐ.
Íèæåñëåäóþùàÿ ïàðà òåðìèíîâ ÿâëÿåòñÿ íàñòîëüêî çíà÷èìîé è ÷àñòî óïîòðåáëÿåìîé, ÷òî
ìû ðåøèëè ðàññìîòðåòü åå îòäåëüíî è ïðåäîñòàâèëè åé ââîäíîå ìåñòî.
critical, criticality [êðèòè÷åñêèé, êðèòè÷íîñòü]:
critical, criticality [êðèòè÷åñêèé, êðèòè÷íîñòü]:critical, criticality [êðèòè÷åñêèé, êðèòè÷íîñòü]:
critical, criticality [êðèòè÷åñêèé, êðèòè÷íîñòü]:
ïðàâèëüíîå èñïîëüçîâàíèå îáû÷íî ñîîòâåòñòâóåò
ñëåäóþùåìó îïðåäåëåíèþ, ïðèâîäèìîìó â Ìåæäóíàðîäíîì ñëîâàðå Âåáñòåðà, èçäàíèå
âòîðîå, ïîëíîå:
-
--
-ity [
ity [ity [
ity [-
--
-ñòü]:
ñòü]:ñòü]:
ñòü]:
cóôôèêñ, îáîçíà÷àþùèé ñîñòîÿíèå, óñëîâèå, êà÷åñòâî, ñòåïåíü, èñïîëüçóåìûé äëÿ
îáðàçîâàíèÿ àáñòðàêòíûõ ñóùåñòâèòåëüíûõ îò ïðèëàãàòåëüíûõ, íàïðèìåð, êèñëîòíîñòü
(acidity), íåñ÷àñòüå (calamity).
Òàêèì îáðàçîì, âûðàæåíèÿ “delayed criticality” (êðèòè÷íîñòü íà çàïàçäûâàþùèõ íåéòðîíàõ)
è “delayed critical state” (êðèòè÷åñêîå ñîñòîÿíèå íà çàïàçäûâàþùèõ íåéòðîíàõ) ÿâëÿþòñÿ
ýêâèâàëåíòíûìè. Ñëîâî “critical” íå èñïîëüçóåòñÿ êàê ñóùåñòâèòåëüíîå, íî ìîæåò
óïîòðåáëÿòüñÿ â ýòîé ðîëè â îáîçíà÷åíèÿõ, íà ñõåìàõ è ãðàôèêàõ, òàì, ãäå èìååòñÿ
äåôèöèò ìåñòà, îçíà÷àÿ “critical state”.  ñëó÷àÿõ, êîãäà çíà÷åíèå ïðèëàãàòåëüíîãî
“critical” ìîæåò áûòü íåïðàâèëüíî èñòîëêîâàíî, íàïðèìåð, “critical terms”, “critical
accidents”, åãî ìîæíî çàìåíèòü äëÿ ÿñíîñòè ñóùåñòâèòåëüíûì “criticality”. Èñïîëüçîâàíèå
òåðìèíà “criticality” äëÿ îáîçíà÷åíèÿ “critical condition”, êàê ìû ìîæåì ÷àñòî ýòî ñëûøàòü,
ÿâëÿåòñÿ íåïðèåìëåìûì. Ñìîòðè: êðèòè÷íîñòü íà çàïàçäûâàþùèõ íåéòðîíàõ,
êðèòè÷íîñòü íà ìãíîâåííûõ íåéòðîíàõ.
Albedo, neutron [àëüáåäî íåéòðîíîâ]
Albedo, neutron [àëüáåäî íåéòðîíîâ]Albedo, neutron [àëüáåäî íåéòðîíîâ]
Albedo, neutron [àëüáåäî íåéòðîíîâ]: âåðîÿòíîñòü òîãî, ÷òî ïðè îïðåäåëåííûõ óñëîâèÿõ íåéòðîí,
âõîäÿùèé â íåêóþ îáëàñòü ÷åðåç íåêóþ ïîâåðõíîñòü, âåðíåòñÿ îáðàòíî ÷åðåç ýòó æå
ïîâåðõíîñòü.
absorbed dose
absorbed doseabsorbed dose
absorbed dose [ïîãëîùåííàÿ äîçà]:
[ïîãëîùåííàÿ äîçà]:[ïîãëîùåííàÿ äîçà]:
[ïîãëîùåííàÿ äîçà]:
ýíåðãèÿ, ïåðåäàííàÿ âåùåñòâó ïðÿìî èëè êîñâåííî ÷åðåç
âîçäåéñòâèå èîíèçèðóþùåãî èçëó÷åíèÿ, íà åäèíèöó ìàññû îáëó÷åííîãî ìàòåðèàëà â äàííîé
êîíêðåòíîé òî÷êå; åäèíèöåé ïîãëîùåííîé äîçû ÿâëÿåòñÿ ðàä; â íàñòîÿùåå âðåìÿ
â Ìåæäóíàðîäíîé ñèñòåìå åäèíèö (ÑÈ) èñïîëüçóåòñÿ ãðåé (Ãð). 100 ðàä = 1 ãðåé. Ñìîòðè:
ðàä, ãðåé.
A-2
absorption, neutron [ïîãëîùåíèå íåéòðîíîâ]:
absorption, neutron [ïîãëîùåíèå íåéòðîíîâ]:absorption, neutron [ïîãëîùåíèå íåéòðîíîâ]:
absorption, neutron [ïîãëîùåíèå íåéòðîíîâ]:
ðåàêöèÿ, èíèöèèðóåìàÿ íåéòðîíàìè, âêëþ÷àÿ
äåëåíèå, â ðåçóëüòàòå êîòîðîé íåéòðîí ïåðåñòàåò ñóùåñòâîâàòü êàê ñâîáîäíàÿ ÷àñòèöà.
Ñå÷åíèå ðåàêöèè ïîãëîùåíèÿ îáîçíà÷àåòñÿ êàê σ
a
. Ñìîòðè: çàõâàò íåéòðîííûé, ñå÷åíèå
ðåàêöèè íåéòðîíîâ.
alarm system, criticality accident [ñèñòåìà àâàðèéíîé ñèãíàëèçàöèè, àâàðèÿ ñ
alarm system, criticality accident [ñèñòåìà àâàðèéíîé ñèãíàëèçàöèè, àâàðèÿ ñalarm system, criticality accident [ñèñòåìà àâàðèéíîé ñèãíàëèçàöèè, àâàðèÿ ñ
alarm system, criticality accident [ñèñòåìà àâàðèéíîé ñèãíàëèçàöèè, àâàðèÿ ñ
âîçíèêíîâåíèåì
âîçíèêíîâåíèåì âîçíèêíîâåíèåì
âîçíèêíîâåíèåì
êðèòè÷íîñòè]:
êðèòè÷íîñòè]:êðèòè÷íîñòè]:
êðèòè÷íîñòè]:
ñèñòåìà, ñïîñîáíàÿ ïîäàâàòü çâóêîâîé ñèãíàë ïðè îáíàðóæåíèè íåéòðîííîãî
èëè ãàììà-èçëó÷åíèÿ âî âðåìÿ àâàðèè ñ âîçíèêíîâåíèåì êðèòè÷íîñòè. Ñìîòðè: àâàðèÿ
ñ âîçíèêíîâåíèåì ÑÖÐ.
alpha particle [àëüôà ÷àñòèöà]:
alpha particle [àëüôà ÷àñòèöà]:alpha particle [àëüôà ÷àñòèöà]:
alpha particle [àëüôà ÷àñòèöà]:
ÿäðî ãåëèÿ-4, èñïóñêàåìîå â ïðîöåññå ïðåâðàùåíèÿ ÿäðà.
beta particle [áåò
beta particle [áåòbeta particle [áåò
beta particle [áåòà
àà
à-
--
-÷àñòèöà]
÷àñòèöà]÷àñòèöà]
÷àñòèöà]: ýëåêòðîí èëè ïîçèòðîí, èñïóñêàåìûé â ïðîöåññå ïðåâðàùåíèÿ ÿäðà.
buckling [ëàïëàñèàí, îïåðàòîð Ëàïëàñà]:
buckling [ëàïëàñèàí, îïåðàòîð Ëàïëàñà]:buckling [ëàïëàñèàí, îïåðàòîð Ëàïëàñà]:
buckling [ëàïëàñèàí, îïåðàòîð Ëàïëàñà]:
â íàøåì ñëó÷àå ýòî — àëãåáðàè÷åñêèå âûðàæåíèÿ,
óñòàíàâëèâàþùèå ñîîòíîøåíèå ìåæäó êðèòè÷åñêèìè ðàçìåðàìè ïðîñòûõ ôîðì (ñôåðà,
öèëèíäð, êóá) àêòèâíîé çîíû îäíîãî ñîñòàâà è òàêèìè æå îòðàæàòåëÿìè. Íàïðèìåð,
èçâåñòíûé ðàäèóñ êðèòè÷åñêîé ñôåðû ìîæíî èñïîëüçîâàòü äëÿ îïðåäåëåíèÿ ðàäèóñà
è äëèíû ñîîòâåòñòâóþùåãî êðèòè÷åñêîãî öèëèíäðà. Ñìîòðè: àêòèâíàÿ çîíà,
îòðàæàòåëü.
burst, prompt [èìïóëüñ íà ìãí
burst, prompt [èìïóëüñ íà ìãíburst, prompt [èìïóëüñ íà ìãí
burst, prompt [èìïóëüñ íà ìãíîâåííûõ íåéòðîíàõ]:
îâåííûõ íåéòðîíàõ]:îâåííûõ íåéòðîíàõ]:
îâåííûõ íåéòðîíàõ]:
îáû÷íî èìååò îòíîøåíèå ê èìïóëüñó ýíåðãèè
ïðè äåëåíèè â ðåàêòîðå èìïóëüñíîãî òèïà. Ñìîòðè èìïóëüñíûé ðåàêòîð íà ìãíîâåííûõ
íåéòðîíàõ, âñïëåñê (ìãíîâåííûé âñïëåñê ìîùíîñòè).
capture, neutron [çàõâàò íåéòðîííûé]
capture, neutron [çàõâàò íåéòðîííûé]capture, neutron [çàõâàò íåéòðîííûé]
capture, neutron [çàõâàò íåéòðîííûé]: ïîãëîùåíèå íåéòðîíà, íå ïðèâîäÿùåå ê äåëåíèþ èëè
îáðàçîâàíèþ äðóãîãî íåéòðîíà. Ñå÷åíèå çàõâàòà îáîçíà÷àåòñÿ êàê σ
ñ
.
Ñìîòðè:ïîãëîùåíèå íåéòðîíîâ, ñå÷åíèå ðåàêöèè íåéòðîíîâ.
cent [öåíò]
cent [öåíò]cent [öåíò]
cent [öåíò]: åäèíèöà ðåàêòèâíîñòè, ðàâíàÿ îäíîé ñîòîé äîëè ïðèðàùåíèÿ ìåæäó êðèòè÷íîñòüþ íà
çàïàçäûâàþùèõ íåéòðîíàõ è êðèòè÷íîñòüþ íà ìãíîâåííûõ íåéòðîíàõ (β). Ñìîòðè: áåòà,
ðåàêòèâíîñòü.
chain reaction, fission [öåïíàÿ ðåàêöèÿ äåëåíèÿ]:
chain reaction, fission [öåïíàÿ ðåàêöèÿ äåëåíèÿ]:chain reaction, fission [öåïíàÿ ðåàêöèÿ äåëåíèÿ]:
chain reaction, fission [öåïíàÿ ðåàêöèÿ äåëåíèÿ]:
ïîñëåäîâàòåëüíîñòü ðåàêöèé äåëåíèÿ ÿäðà,
â êîòîðûõ ïðîöåññ äåëåíèÿ èíèöèèðóåòñÿ íåéòðîíàìè, îáðàçîâàííûìè â ïðåäûäóùåì àêòå
äåëåíèÿ.  çàâèñèìîñòè îò òîãî, ÿâëÿåòñÿ ëè ÷èñëî äåëåíèé, íåïîñðåäñòâåííî
èíèöèèðîâàííûõ íåéòðîíàìè îäíîãî äåëåíèÿ, â ñðåäíåì ìåíüøèì, ðàâíûì èëè áîëüøèì
åäèíèöû, ðàçëè÷àþò öåïíûå ðåàêöèè ñõîäÿùèåñÿ (ïîäêðèòè÷åñêèå),
ñàìîïîääåðæèâàþùèåñÿ (êðèòè÷åñêèå) è ðàñõîäÿùèåñÿ (íàäêðèòè÷åñêèå).
core [àêòèâíàÿ çîíà]
core [àêòèâíàÿ çîíà]core [àêòèâíàÿ çîíà]
core [àêòèâíàÿ çîíà]: ÷àñòü äåëÿùåéñÿ ñèñòåìû, ñîäåðæàùàÿ íàèáîëüøåå êîëè÷åñòâî
äåëÿùåãîñÿ ìàòåðèàëà, îòäåëÿåìàÿ îò âíåøíåãî îòðàæàòåëÿ. Ñìîòðè: ñèñòåìà
ñ äåëÿùèìñÿ ìàòåðèàëîì, îòðàæàòåëü.
critical infinite cylinder [áåñêîí
critical infinite cylinder [áåñêîícritical infinite cylinder [áåñêîí
critical infinite cylinder [áåñêîíå÷íûé êðèòè÷åñêèé öèëèíäð]
å÷íûé êðèòè÷åñêèé öèëèíäð]å÷íûé êðèòè÷åñêèé öèëèíäð]
å÷íûé êðèòè÷åñêèé öèëèíäð]: äëÿ îïðåäåëåííîé äåëÿùåéñÿ ñðåäû
è îêðóæàþùåãî îòðàæàòåëÿ áåñêîíå÷íî äëèííûé öèëèíäð ñ äèàìåòðîì, ñïîñîáñòâóþùèì
êðèòè÷åñêîìó ñîñòîÿíèþ.
critical infinite slab [áåñêîíå÷íàÿ êðèòè÷åñêàÿ ïëèòà]:
critical infinite slab [áåñêîíå÷íàÿ êðèòè÷åñêàÿ ïëèòà]:critical infinite slab [áåñêîíå÷íàÿ êðèòè÷åñêàÿ ïëèòà]:
critical infinite slab [áåñêîíå÷íàÿ êðèòè÷åñêàÿ ïëèòà]:
äëÿ îïðåäåëåííîé äåëÿùåéñÿ ñðåäû
è îòðàæàòåëÿ íà êàæäîé èç ïîâåðõíîñòåé - ïëèòà ñ áåñêîíå÷íûìè áîêîâûìè ðàçìåðàìè
è òîëùèíîé, îáåñïå÷èâàþùåé åå êðèòè÷íîñòü.
criticality accident [àâàðèÿ ñ
criticality accident [àâàðèÿ ñcriticality accident [àâàðèÿ ñ
criticality accident [àâàðèÿ ñ
âîçíèêíîâåíèåì ÑÖÐ]
âîçíèêíîâåíèåì ÑÖÐ]âîçíèêíîâåíèåì ÑÖÐ]
âîçíèêíîâåíèåì ÑÖÐ]: âûáðîñ ýíåðãèè â ðåçóëüòàòå íåîæèäàííî
âîçíèêøåé ñàìîïîääåðæèâàþùåéñÿ èëè íåîãðàíè÷åííî ðàñòóùåé öåïíîé ðåàêöèè.
A-3
criticality safety [ÿäåðíàÿ áåçîïàñíîñòü]
criticality safety [ÿäåðíàÿ áåçîïàñíîñòü]criticality safety [ÿäåðíàÿ áåçîïàñíîñòü]
criticality safety [ÿäåðíàÿ áåçîïàñíîñòü]: êîìïëåêñ ìåð è ñðåäñòâ çàùèòû îò ïîñëåäñòâèé àâàðèè
ñ âîçíèêíîâåíèåì ÑÖÐ, ïðåäïî÷òèòåëüíî, ïóòåì ïðåäîòâðàùåíèÿ ýòîé àâàðèè. Âêëþ÷àåò
ìåòîäèêè, ïîäãîòîâêó ïåðñîíàëà è äðóãèå ìåðû äîïîëíèòåëüíî ê ôèçè÷åñêîé çàùèòå.
Ñìîòðè: àâàðèÿ ñ âîçíèêíîâåíèåì ÑÖÐ.
criticality safety standards
criticality safety standardscriticality safety standards
criticality safety standards [ñòàíäàðòû îáåñïå÷åíèÿ ÿäåðíîé áåçîïàñíîñòè]
[ñòàíäàðòû îáåñïå÷åíèÿ ÿäåðíîé áåçîïàñíîñòè][ñòàíäàðòû îáåñïå÷åíèÿ ÿäåðíîé áåçîïàñíîñòè]
[ñòàíäàðòû îáåñïå÷åíèÿ ÿäåðíîé áåçîïàñíîñòè]: äàííûå ñòàíäàðòû
îïèñûâàþò ìåòîäû îáåñïå÷åíèÿ ÿäåðíîé áåçîïàñíîñòè, îáùèå äëÿ ïðîìûøëåííîñòè. Èõ
ñîãëàñîâàíèå è ïðèíÿòèå îáåñïå÷èâàåòñÿ Àìåðèêàíñêèì íàöèîíàëüíûì èíñòèòóòîì
ñòàíäàðòîâ.
ñross section
ñross section ñross section
ñross section σ
σσ
σ, neutron [ñå÷åíèå ðåàêöèè íåéòðîíîâ]
, neutron [ñå÷åíèå ðåàêöèè íåéòðîíîâ], neutron [ñå÷åíèå ðåàêöèè íåéòðîíîâ]
, neutron [ñå÷åíèå ðåàêöèè íåéòðîíîâ]: êîýôôèöèåíò ïðîïîðöèîíàëüíîñòè,
ñâÿçûâàþùèé ñêîðîñòü äàííîé êîíêðåòíîé ðåàêöèè (íàïðèìåð, çàõâàòà èëè äåëåíèÿ)
ñ ïðîèçâåäåíèåì êîëè÷åñòâà íåéòðîíîâ â ñåêóíäó, ïàäàþùèõ ïåðïåíäèêóëÿðíî íà åäèíèöó
ïëîùàäè òîíêîé ìèøåíè, íà êîëè÷åñòâî ÿäåð ìèøåíè íà åäèíèöå ïëîùàäè. Äëÿ êàæäîãî
ÿäðà ìèøåíè ðàññìàòðèâàåòñÿ ìàëàÿ ïëîùàäü, âûðàæàåìàÿ â áàðíàõ, ò. å. 10
—24
ñì
2
.
Ñìîòðè: ïîãëîùåíèå íåéòðîíîâ, çàõâàò íåéòðîííûé, äåëåíèå ÿäðà.
decay, radioactive [ðàñïàä ðàäèîàêòèâíûé]:
decay, radioactive [ðàñïàä ðàäèîàêòèâíûé]:decay, radioactive [ðàñïàä ðàäèîàêòèâíûé]:
decay, radioactive [ðàñïàä ðàäèîàêòèâíûé]:
ïðîöåññ ñïîíòàííîãî ÿäåðíîãî ïðåâðàùåíèÿ, â õîäå
êîòîðîãî èñïóñêàþòñÿ ÷àñòèöû èëè ãàììà-èçëó÷åíèå, ðåíòãåíîâñêîå èçëó÷åíèå êàê
ñëåäñòâèå çàõâàòà îðáèòàëüíîãî ýëåêòðîíà, èëè â õîäå êîòîðîãî ïðîèñõîäèò ñïîíòàííîå
äåëåíèå ÿäðà. Ñìîòðè: äåëåíèå ÿäðà, ãàììà-èçëó÷åíèå.
delayed criticality
delayed criticalitydelayed criticality
delayed criticality [êðèòè÷íîñòü íà çàïàçäûâàþùèõ íåéòðîíàõ]:
[êðèòè÷íîñòü íà çàïàçäûâàþùèõ íåéòðîíàõ]:[êðèòè÷íîñòü íà çàïàçäûâàþùèõ íåéòðîíàõ]:
[êðèòè÷íîñòü íà çàïàçäûâàþùèõ íåéòðîíàõ]:
ñîñòîÿíèå äåëÿùåéñÿ ñèñòåìû,
ïðè êîòîðîì k
eff
= 1, ò. å. óñòîé÷èâîå ñîñòîÿíèå. Ñìîòðè: êîýôôèöèåíò ðàçìíîæåíèÿ.
delayed neutrons [çàïàçäûâàþùèå íåéòðîíû]:
delayed neutrons [çàïàçäûâàþùèå íåéòðîíû]:delayed neutrons [çàïàçäûâàþùèå íåéòðîíû]:
delayed neutrons [çàïàçäûâàþùèå íåéòðîíû]:
íåéòðîíû, èñïóñêàåìûå âîçáóæäåííûì ÿäðîì
â ðåçóëüòàòå áåòà-ðàñïàäà ïîñëå äåëåíèÿ â èíòåðâàëå âðåìåíè îò ñåêóíä äî íåñêîëüêèõ
ìèíóò. Ñìîòðè: ìãíîâåííûå íåéòðîíû.
dollar [áåòà]:
dollar [áåòà]:dollar [áåòà]:
dollar [áåòà]:
åäèíèöà ðåàêòèâíîñòè, ðàâíàÿ ðàçíèöå ìåæäó êðèòè÷íîñòüþ íà çàïàçäûâàþùèõ
íåéòðîíàõ è íà áûñòðûõ íåéòðîíàõ äëÿ ôèêñèðîâàííîé ñèñòåìû îñóùåñòâëåíèÿ öåïíîé
ðåàêöèè. Ñìîòðè: ðåàêòèâíîñòü.
dose equivalent [ýêâèâàëåíòíàÿ äîçà ]:
dose equivalent [ýêâèâàëåíòíàÿ äîçà ]:dose equivalent [ýêâèâàëåíòíàÿ äîçà ]:
dose equivalent [ýêâèâàëåíòíàÿ äîçà ]:
ïîãëîùåííàÿ äîçà, óìíîæåííàÿ íà êîýôôèöèåíò êà÷åñòâà
è äðóãèå ìåíåå çíà÷èìûå ïðåîáðàçóþùèå êîýôôèöèåíòû ñ öåëüþ ñëîæåíèÿ äîç îò
ðàçëè÷íûõ èçëó÷åíèé (àëüôà, áåòà, ãàììà, ìåäëåííûå íåéòðîíû, áûñòðûå íåéòðîíû) äëÿ
ïîëó÷åíèÿ ýôôåêòèâíîé ïîëíîé äîçû â äàííîé êîíêðåòíîé òî÷êå. Îáùåïðèíÿòîé åäèíèöåé
èçìåðåíèÿ ÿâëÿåòñÿ áýð; â íàñòîÿùåå âðåìÿ, ñîãëàñíî Ìåæäóíàðîäíîé ñèñòåìå åäèíèö
(CÈ), ýòî çèâåðò (Çâ), 100 áýð = 1 Çâ. Ñìîòðè: áýð, çèâåðò.
dose rate [ìîùíîñòü äîçû]:
dose rate [ìîùíîñòü äîçû]:dose rate [ìîùíîñòü äîçû]:
dose rate [ìîùíîñòü äîçû]:
ïîãëîùåííàÿ äîçà â åäèíèöó âðåìåíè. Ñìîòðè: ïîãëîùåííàÿ äîçà.
excursion, nuclear [âíåçàïíîå âîçðàñòàíèå
excursion, nuclear [âíåçàïíîå âîçðàñòàíèå excursion, nuclear [âíåçàïíîå âîçðàñòàíèå
excursion, nuclear [âíåçàïíîå âîçðàñòàíèå êðèòè÷íîñòè]:
êðèòè÷íîñòè]:êðèòè÷íîñòè]:
êðèòè÷íîñòè]:
ðåçêîå, â âèäå ïèêà, âîçðàñòàíèå
ñêîðîñòè äåëåíèÿ â íàäêðèòè÷åñêîé ñèñòåìå ñ ïîñëåäóþùèì ñíèæåíèåì äî íèçêîãî
çíà÷åíèÿ.
excursion, prompt
excursion, promptexcursion, prompt
excursion, prompt-
--
-power [ìãíîâåííîå ðåçêîå óâåëè÷åíèå ìîùíîñòè, ðàçãîí íà ìãíîâåííûõ
power [ìãíîâåííîå ðåçêîå óâåëè÷åíèå ìîùíîñòè, ðàçãîí íà ìãíîâåííûõ power [ìãíîâåííîå ðåçêîå óâåëè÷åíèå ìîùíîñòè, ðàçãîí íà ìãíîâåííûõ
power [ìãíîâåííîå ðåçêîå óâåëè÷åíèå ìîùíîñòè, ðàçãîí íà ìãíîâåííûõ
íåéòðîíàõ]:
íåéòðîíàõ]:íåéòðîíàõ]:
íåéòðîíàõ]:
âíåçàïíîå âîçðàñòàíèå ìîùíîñòè, âîçíèêàþùåå êàê ðåçóëüòàò ñîçäàíèÿ
êðèòè÷åñêîé êîíôèãóðàöèè äåëÿùåãîñÿ ìàòåðèàëà íà ìãíîâåííûõ íåéòðîíàõ. Êàê
ïðàâèëî, ýòî ðåçêèé âñïëåñê ìîùíîñòè, çà êîòîðûì ñëåäóåò ïîëîãèé ó÷àñòîê êðèâîé
ñ âîçìîæíûì ïðåðûâàíèåì åå íåáîëüøèìè ïèêàìè. Ñìîòðè: âíåçàïíîå âîçðàñòàíèå
êðèòè÷íîñòè, âñïëåñê (ìãíîâåííûé âñïëåñê ìîùíîñòè).