Calculation of the effective delayed-neutron fraction and prompt-neutron lifetime in IBR-2M
The main parameters of IBR-2M are presented: the effective delayed-neutron fraction β eff and the promptneutron lifetime τ, calculated using the DORT two-dimensional multigroup neutron-transport compute code and the SCALE4 code with a system of multigroup nuclear constants. For a regular IBR-2M regi...
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| Veröffentlicht in: | Atomic energy (New York, N.Y.) N.Y.), 2011-12, Vol.111 (2), p.122-126 |
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| creator | Pepelyshev, Yu. N. Rogov, A. D. Taiybov, L. A. Min, Jang Chang Mekhtieva, R. N. |
| description | The main parameters of IBR-2M are presented: the effective delayed-neutron fraction β
eff
and the promptneutron lifetime τ, calculated using the DORT two-dimensional multigroup neutron-transport compute code and the SCALE4 code with a system of multigroup nuclear constants. For a regular IBR-2M regime β
eff
= 0.00216 ± 0.00007, τ = (6.5 ± 0.5)·10
–8
sec, the delay-neutron value γ = 0.980, the prompt-neutron decay constant in the critical state α = 3.5·104 sec
–1
. The calculations showed that the effective delayed-neutron fraction for IBR-2M is identical, within the error limits, to the measured value for IBR-2, the prompt-neutron lifetime is approximately 5% longer (β
eff
= 0.00216, τ = (6.2 ± 0.2)·10
–8
sec). It is shown that β
eff
and τ increase somewhat as the IBR-2 core size increases in the radial direction. |
| doi_str_mv | 10.1007/s10512-011-9463-8 |
| format | Article |
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eff
and the promptneutron lifetime τ, calculated using the DORT two-dimensional multigroup neutron-transport compute code and the SCALE4 code with a system of multigroup nuclear constants. For a regular IBR-2M regime β
eff
= 0.00216 ± 0.00007, τ = (6.5 ± 0.5)·10
–8
sec, the delay-neutron value γ = 0.980, the prompt-neutron decay constant in the critical state α = 3.5·104 sec
–1
. The calculations showed that the effective delayed-neutron fraction for IBR-2M is identical, within the error limits, to the measured value for IBR-2, the prompt-neutron lifetime is approximately 5% longer (β
eff
= 0.00216, τ = (6.2 ± 0.2)·10
–8
sec). It is shown that β
eff
and τ increase somewhat as the IBR-2 core size increases in the radial direction.</description><identifier>ISSN: 1063-4258</identifier><identifier>EISSN: 1573-8205</identifier><identifier>DOI: 10.1007/s10512-011-9463-8</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>Accuracy ; Approximation ; Atomic energy ; Codes ; Constants ; Decay ; Energy ; Error analysis ; Errors ; Hadrons ; Heavy Ions ; International ; Mathematical analysis ; Neutrons ; Nuclear Chemistry ; Nuclear Energy ; Nuclear Physics ; Nuclear power generation ; Nuclear reactors ; Physics ; Physics and Astronomy ; Studies ; Systems design ; Two dimensional</subject><ispartof>Atomic energy (New York, N.Y.), 2011-12, Vol.111 (2), p.122-126</ispartof><rights>Springer Science+Business Media, Inc. 2011</rights><rights>COPYRIGHT 2011 Springer</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c373t-79feadd65821193019a94d8978a2d688645be43de8b21f9a00a39590432821573</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10512-011-9463-8$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10512-011-9463-8$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Pepelyshev, Yu. N.</creatorcontrib><creatorcontrib>Rogov, A. D.</creatorcontrib><creatorcontrib>Taiybov, L. A.</creatorcontrib><creatorcontrib>Min, Jang Chang</creatorcontrib><creatorcontrib>Mekhtieva, R. N.</creatorcontrib><title>Calculation of the effective delayed-neutron fraction and prompt-neutron lifetime in IBR-2M</title><title>Atomic energy (New York, N.Y.)</title><addtitle>At Energy</addtitle><description>The main parameters of IBR-2M are presented: the effective delayed-neutron fraction β
eff
and the promptneutron lifetime τ, calculated using the DORT two-dimensional multigroup neutron-transport compute code and the SCALE4 code with a system of multigroup nuclear constants. For a regular IBR-2M regime β
eff
= 0.00216 ± 0.00007, τ = (6.5 ± 0.5)·10
–8
sec, the delay-neutron value γ = 0.980, the prompt-neutron decay constant in the critical state α = 3.5·104 sec
–1
. The calculations showed that the effective delayed-neutron fraction for IBR-2M is identical, within the error limits, to the measured value for IBR-2, the prompt-neutron lifetime is approximately 5% longer (β
eff
= 0.00216, τ = (6.2 ± 0.2)·10
–8
sec). It is shown that β
eff
and τ increase somewhat as the IBR-2 core size increases in the radial direction.</description><subject>Accuracy</subject><subject>Approximation</subject><subject>Atomic energy</subject><subject>Codes</subject><subject>Constants</subject><subject>Decay</subject><subject>Energy</subject><subject>Error analysis</subject><subject>Errors</subject><subject>Hadrons</subject><subject>Heavy Ions</subject><subject>International</subject><subject>Mathematical analysis</subject><subject>Neutrons</subject><subject>Nuclear Chemistry</subject><subject>Nuclear Energy</subject><subject>Nuclear Physics</subject><subject>Nuclear power generation</subject><subject>Nuclear reactors</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Studies</subject><subject>Systems design</subject><subject>Two dimensional</subject><issn>1063-4258</issn><issn>1573-8205</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kUFv1DAQhSMEEqXwA7hFnOCQMrbj2D6WFYWVipBKe-JgufF4cZU4S-xU9N93tkGgIiEfPJr53uiNXlW9ZnDCANT7zEAy3gBjjWk70egn1RGTigoO8inVQM2WS_28epHzDQCYzuij6vvGDf0yuBKnVE-hLj-wxhCwL_EWa4-Du0PfJFzKTECYXf9AuuTr_TyN-_JnNsSAJY5Yx1RvP1w0_MvL6llwQ8ZXv__j6urs4-Xmc3P-9dN2c3re9EKJ0igT0HnfSc0ZMwKYcab12ijtuO-07lp5ja3wqK85C8YBOGGkgVZwUtCNx9XbdS85-rlgLnaMucdhcAmnJVtGKzuuWs0JffMPejMtcyJ31oARHLTQBJ2s0M4NaGMKU6G76XkcYz8lDJH6p0JKpZQAIMG7RwJiCv4qO7fkbLffLh6zbGX7ecp5xmD3cxzdfEc27SFKu0ZpKUp7iNIeDPFVk4lNO5z_uv6_6B4sV53V</recordid><startdate>201112</startdate><enddate>201112</enddate><creator>Pepelyshev, Yu. 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N.</au><au>Rogov, A. D.</au><au>Taiybov, L. A.</au><au>Min, Jang Chang</au><au>Mekhtieva, R. N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Calculation of the effective delayed-neutron fraction and prompt-neutron lifetime in IBR-2M</atitle><jtitle>Atomic energy (New York, N.Y.)</jtitle><stitle>At Energy</stitle><date>2011-12</date><risdate>2011</risdate><volume>111</volume><issue>2</issue><spage>122</spage><epage>126</epage><pages>122-126</pages><issn>1063-4258</issn><eissn>1573-8205</eissn><abstract>The main parameters of IBR-2M are presented: the effective delayed-neutron fraction β
eff
and the promptneutron lifetime τ, calculated using the DORT two-dimensional multigroup neutron-transport compute code and the SCALE4 code with a system of multigroup nuclear constants. For a regular IBR-2M regime β
eff
= 0.00216 ± 0.00007, τ = (6.5 ± 0.5)·10
–8
sec, the delay-neutron value γ = 0.980, the prompt-neutron decay constant in the critical state α = 3.5·104 sec
–1
. The calculations showed that the effective delayed-neutron fraction for IBR-2M is identical, within the error limits, to the measured value for IBR-2, the prompt-neutron lifetime is approximately 5% longer (β
eff
= 0.00216, τ = (6.2 ± 0.2)·10
–8
sec). It is shown that β
eff
and τ increase somewhat as the IBR-2 core size increases in the radial direction.</abstract><cop>Boston</cop><pub>Springer US</pub><doi>10.1007/s10512-011-9463-8</doi><tpages>5</tpages></addata></record> |
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| subjects | Accuracy Approximation Atomic energy Codes Constants Decay Energy Error analysis Errors Hadrons Heavy Ions International Mathematical analysis Neutrons Nuclear Chemistry Nuclear Energy Nuclear Physics Nuclear power generation Nuclear reactors Physics Physics and Astronomy Studies Systems design Two dimensional |
| title | Calculation of the effective delayed-neutron fraction and prompt-neutron lifetime in IBR-2M |
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