Effects of reaction temperature and inlet oxidizing gas flow rate on IG-110 graphite oxidation used in HTR-PM
The oxidation behavior of a selected nuclear graphite (IG-110) used in Pebble-bed Module High Temperature gas-cooled Reactor was investigated under the condition of air ingress accident. The oblate rectangular specimen was oxidized by oxidant gas with oxygen mole fraction of 20% and flow rates of 12...
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| Veröffentlicht in: | Journal of nuclear science and technology 2017-02, Vol.54 (2), p.196-204 |
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| container_title | Journal of nuclear science and technology |
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| creator | Sun, Ximing Dong, Yujie Zhou, Yangping Li, Zhengcao Shi, Lei Sun, Yuliang Zhang, Zuoyi |
| description | The oxidation behavior of a selected nuclear graphite (IG-110) used in Pebble-bed Module High Temperature gas-cooled Reactor was investigated under the condition of air ingress accident. The oblate rectangular specimen was oxidized by oxidant gas with oxygen mole fraction of 20% and flow rates of 125-500 ml/min at temperature of 400-1200 °C. Experiment results indicate that the oxidation behavior can also be classified into three regimes according to temperature. The regime I at 400-550 °C has lower apparent activation energies of 75.57-138.59 kJ/mol when the gas flow rate is 125-500 ml/min. In the regime II at 600-900 °C, the oxidation rate restricted by the oxygen supply to graphite is almost stable with the increase of temperature. In the regime III above 900 °C, the oxidation rate increases obviously with the increase of temperature. With the increase of inlet gas flow from 125 to 500 ml/min, the apparent activation energy in regime I is increased and the stableness of oxidation rate in regime II is reduced. |
| doi_str_mv | 10.1080/00223131.2016.1233080 |
| format | Article |
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The oblate rectangular specimen was oxidized by oxidant gas with oxygen mole fraction of 20% and flow rates of 125-500 ml/min at temperature of 400-1200 °C. Experiment results indicate that the oxidation behavior can also be classified into three regimes according to temperature. The regime I at 400-550 °C has lower apparent activation energies of 75.57-138.59 kJ/mol when the gas flow rate is 125-500 ml/min. In the regime II at 600-900 °C, the oxidation rate restricted by the oxygen supply to graphite is almost stable with the increase of temperature. In the regime III above 900 °C, the oxidation rate increases obviously with the increase of temperature. With the increase of inlet gas flow from 125 to 500 ml/min, the apparent activation energy in regime I is increased and the stableness of oxidation rate in regime II is reduced.</description><identifier>ISSN: 0022-3131</identifier><identifier>EISSN: 1881-1248</identifier><identifier>DOI: 10.1080/00223131.2016.1233080</identifier><language>eng</language><publisher>Tokyo: Taylor & Francis</publisher><subject>Activation energy ; gas chromatography ; Gas flow ; Graphite ; HTGR ; HTR-PM ; IG-110 ; Inlets ; nuclear graphite ; Nuclear reactions ; Oxidation ; Oxidation rate ; Oxygen</subject><ispartof>Journal of nuclear science and technology, 2017-02, Vol.54 (2), p.196-204</ispartof><rights>2016 Atomic Energy Society of Japan. All rights reserved. 2016</rights><rights>2016 Atomic Energy Society of Japan. 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The oblate rectangular specimen was oxidized by oxidant gas with oxygen mole fraction of 20% and flow rates of 125-500 ml/min at temperature of 400-1200 °C. Experiment results indicate that the oxidation behavior can also be classified into three regimes according to temperature. The regime I at 400-550 °C has lower apparent activation energies of 75.57-138.59 kJ/mol when the gas flow rate is 125-500 ml/min. In the regime II at 600-900 °C, the oxidation rate restricted by the oxygen supply to graphite is almost stable with the increase of temperature. In the regime III above 900 °C, the oxidation rate increases obviously with the increase of temperature. With the increase of inlet gas flow from 125 to 500 ml/min, the apparent activation energy in regime I is increased and the stableness of oxidation rate in regime II is reduced.</description><subject>Activation energy</subject><subject>gas chromatography</subject><subject>Gas flow</subject><subject>Graphite</subject><subject>HTGR</subject><subject>HTR-PM</subject><subject>IG-110</subject><subject>Inlets</subject><subject>nuclear graphite</subject><subject>Nuclear reactions</subject><subject>Oxidation</subject><subject>Oxidation rate</subject><subject>Oxygen</subject><issn>0022-3131</issn><issn>1881-1248</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9kUFr3DAQhUVJoZu0P6Eg6CUXbzWSVpZvDctmE0hpCclZyPZoq2BbW8lmk_z6yN3k0kNOwzy-95jhEfIV2BKYZt8Z41yAgCVnoJbAhcjqB7IAraEALvUJWcxMMUOfyGlKD3lVUukF6TfOYTMmGhyNaJvRh4GO2O8x2nGKSO3QUj90ONLw6Fv_7Icd3dlEXRcONDNIs-F6WwAwuot2_8fPUkbtv6gp4eynV3e3xe-fn8lHZ7uEX17nGbm_3Nytr4qbX9vr9cVN0YgSxsKtoKxaJxrFaw1MCalbqWsu5fyNaMGCFWhZLWruuMYSVV1jU4tKybKuUJyR82PuPoa_E6bR9D412HV2wDAlAxWTXCgmq4x--w99CFMc8nUG9IqJsmQKMrU6Uk0MKUV0Zh99b-OTAWbmEsxbCWYuwbyWkH0_jj4_uBB7ewixa81on7oQXbRD45MR70e8AF04jBU</recordid><startdate>20170201</startdate><enddate>20170201</enddate><creator>Sun, Ximing</creator><creator>Dong, Yujie</creator><creator>Zhou, Yangping</creator><creator>Li, Zhengcao</creator><creator>Shi, Lei</creator><creator>Sun, Yuliang</creator><creator>Zhang, Zuoyi</creator><general>Taylor & Francis</general><general>Taylor & Francis Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-1037-8248</orcidid></search><sort><creationdate>20170201</creationdate><title>Effects of reaction temperature and inlet oxidizing gas flow rate on IG-110 graphite oxidation used in HTR-PM</title><author>Sun, Ximing ; Dong, Yujie ; Zhou, Yangping ; Li, Zhengcao ; Shi, Lei ; Sun, Yuliang ; Zhang, Zuoyi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c371t-f5179df3c62b8106348d48b24412483d1a1a3ea0b3b2f28e7e6bbecb39647b9e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Activation energy</topic><topic>gas chromatography</topic><topic>Gas flow</topic><topic>Graphite</topic><topic>HTGR</topic><topic>HTR-PM</topic><topic>IG-110</topic><topic>Inlets</topic><topic>nuclear graphite</topic><topic>Nuclear reactions</topic><topic>Oxidation</topic><topic>Oxidation rate</topic><topic>Oxygen</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sun, Ximing</creatorcontrib><creatorcontrib>Dong, Yujie</creatorcontrib><creatorcontrib>Zhou, Yangping</creatorcontrib><creatorcontrib>Li, Zhengcao</creatorcontrib><creatorcontrib>Shi, Lei</creatorcontrib><creatorcontrib>Sun, Yuliang</creatorcontrib><creatorcontrib>Zhang, Zuoyi</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of nuclear science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sun, Ximing</au><au>Dong, Yujie</au><au>Zhou, Yangping</au><au>Li, Zhengcao</au><au>Shi, Lei</au><au>Sun, Yuliang</au><au>Zhang, Zuoyi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of reaction temperature and inlet oxidizing gas flow rate on IG-110 graphite oxidation used in HTR-PM</atitle><jtitle>Journal of nuclear science and technology</jtitle><date>2017-02-01</date><risdate>2017</risdate><volume>54</volume><issue>2</issue><spage>196</spage><epage>204</epage><pages>196-204</pages><issn>0022-3131</issn><eissn>1881-1248</eissn><abstract>The oxidation behavior of a selected nuclear graphite (IG-110) used in Pebble-bed Module High Temperature gas-cooled Reactor was investigated under the condition of air ingress accident. The oblate rectangular specimen was oxidized by oxidant gas with oxygen mole fraction of 20% and flow rates of 125-500 ml/min at temperature of 400-1200 °C. Experiment results indicate that the oxidation behavior can also be classified into three regimes according to temperature. The regime I at 400-550 °C has lower apparent activation energies of 75.57-138.59 kJ/mol when the gas flow rate is 125-500 ml/min. In the regime II at 600-900 °C, the oxidation rate restricted by the oxygen supply to graphite is almost stable with the increase of temperature. In the regime III above 900 °C, the oxidation rate increases obviously with the increase of temperature. With the increase of inlet gas flow from 125 to 500 ml/min, the apparent activation energy in regime I is increased and the stableness of oxidation rate in regime II is reduced.</abstract><cop>Tokyo</cop><pub>Taylor & Francis</pub><doi>10.1080/00223131.2016.1233080</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-1037-8248</orcidid></addata></record> |
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| issn | 0022-3131 1881-1248 |
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| source | Alma/SFX Local Collection |
| subjects | Activation energy gas chromatography Gas flow Graphite HTGR HTR-PM IG-110 Inlets nuclear graphite Nuclear reactions Oxidation Oxidation rate Oxygen |
| title | Effects of reaction temperature and inlet oxidizing gas flow rate on IG-110 graphite oxidation used in HTR-PM |
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