{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T15:00:37Z","timestamp":1787238037904,"version":"build-2736575974"},"reference-count":13,"publisher":"Wiley","license":[{"start":{"date-parts":[[2021,10,4]],"date-time":"2021-10-04T00:00:00Z","timestamp":1633305600000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Scanning"],"published-print":{"date-parts":[[2021,10,4]]},"abstract":"<jats:p>A circulating water pump is a key equipment of cooling systems in nuclear power plants. Several anchor bolts were broken at the inlet rings of the same type of pumps. The bolts were turned by a special material for seawater corrosion protection. There were obvious turning tool marks at the root of the thread, which was considered as the source of the crack. The fatigue crack extended to the depth of the bolt, causing obvious radiation stripes on the fracture surface, which was a typical fatigue fracture. Obvious overtightening characteristics were found at the head of the broken bolt. Fracture and energy spectrum analysis showed that the bolt was not corroded. The axial vibration of the pump was measured. The static tensile stress along the bolt axis caused by the preload, the axial tensile stress caused by the axial vibration, and the torsional stress were calculated, respectively. According to the fatigue strength theory, the composite safety factor of the bolt fatigue strength was 1.37 when overtightening at 1.2 times the design torque, which was less than the allowable safety factor of 1.5-1.8, so the bolt was not safe, which further verified the conclusion of fracture analysis. The reason for the low safety factor was caused by the overtightening force. The improvement method was to control the bolt preload or increasing the bolt diameter.<\/jats:p>","DOI":"10.1155\/2021\/7019861","type":"journal-article","created":{"date-parts":[[2021,10,4]],"date-time":"2021-10-04T17:44:42Z","timestamp":1633369482000},"page":"1-8","source":"Crossref","is-referenced-by-count":1,"title":["Fracture Analysis and Fatigue Strength Calculation of Anchor Bolt Used in Circulating Water Pump in Nuclear Power Plant"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4153-2869","authenticated-orcid":true,"given":"Qiang","family":"Chen","sequence":"first","affiliation":[{"name":"Suzhou Nuclear Power Research Institute Co., Ltd., Shenzhen 518120, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuai","family":"Zu","sequence":"additional","affiliation":[{"name":"Suzhou Nuclear Power Research Institute Co., Ltd., Shenzhen 518120, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yinhui","family":"Che","sequence":"additional","affiliation":[{"name":"Suzhou Nuclear Power Research Institute Co., Ltd., Shenzhen 518120, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dongxiong","family":"Feng","sequence":"additional","affiliation":[{"name":"Suzhou Nuclear Power Research Institute Co., Ltd., Shenzhen 518120, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yang","family":"Li","sequence":"additional","affiliation":[{"name":"Suzhou Nuclear Power Research Institute Co., Ltd., Shenzhen 518120, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1016\/j.engfailanal.2019.104355"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.1016\/j.engfailanal.2021.105369"},{"key":"3","doi-asserted-by":"crossref","first-page":"439","DOI":"10.1016\/j.engfailanal.2013.09.009","article-title":"Failure analysis on fracture of worm gear connecting bolts","volume":"36","author":"L. 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Jinfeng","year":"2021","journal-title":"Building science"},{"key":"11","first-page":"1","article-title":"Strength analysis of blade root bolts in hoisting process of single blade of wind turbine","volume":"326","author":"W. Hui","year":"2021","journal-title":"Solar energy"},{"key":"12","doi-asserted-by":"publisher","DOI":"10.1016\/j.engfailanal.2021.105333"},{"issue":"3","key":"13","first-page":"1","article-title":"Fatigue analysis of top cover bolts pumped storage power station based on fatigue cumulative damage theory","volume":"7","author":"Z. Fa","year":"2021","journal-title":"Hydropower and pumped storage"}],"container-title":["Scanning"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/scanning\/2021\/7019861.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/scanning\/2021\/7019861.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/scanning\/2021\/7019861.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,10,4]],"date-time":"2021-10-04T17:44:51Z","timestamp":1633369491000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.hindawi.com\/journals\/scanning\/2021\/7019861\/"}},"subtitle":[],"editor":[{"given":"Jian","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]}],"short-title":[],"issued":{"date-parts":[[2021,10,4]]},"references-count":13,"alternative-id":["7019861","7019861"],"URL":"https:\/\/doi.org\/10.1155\/2021\/7019861","relation":{},"ISSN":["1932-8745","0161-0457"],"issn-type":[{"value":"1932-8745","type":"electronic"},{"value":"0161-0457","type":"print"}],"subject":[],"published":{"date-parts":[[2021,10,4]]}}}