Pub Date : 2024-01-05DOI: 10.1007/s10512-023-01025-z
O. V. Goryunov, S. V. Evropin, S. V. Slovtsov
Due to the current standards providing failing to account for the entire spectrum of loading amplitudes under broadband vibration exposure, durability can be significantly overestimated. The consideration of several harmonics in isolation is insufficient to evaluate actual maximum values and loading amplitudes, which are determined by integrating the spectral density depending on the interval width ∆f. Based on the damageability equivalence principle, a method for reducing broadband exposure to a harmonic equivalent is proposed taking into account the slope of the fatigue curve in the area with the number of cycles exceeding 107. A comparison of equivalent loading parameters obtained using the proposed approach with a shadow-method schematization demonstrated satisfactory results.
{"title":"Assessing the durability of nuclear plant elements under high‑frequency broadband loading","authors":"O. V. Goryunov, S. V. Evropin, S. V. Slovtsov","doi":"10.1007/s10512-023-01025-z","DOIUrl":"https://doi.org/10.1007/s10512-023-01025-z","url":null,"abstract":"<p>Due to the current standards providing failing to account for the entire spectrum of loading amplitudes under broadband vibration exposure, durability can be significantly overestimated. The consideration of several harmonics in isolation is insufficient to evaluate actual maximum values and loading amplitudes, which are determined by integrating the spectral density depending on the interval width ∆<i>f</i>. Based on the damageability equivalence principle, a method for reducing broadband exposure to a harmonic equivalent is proposed taking into account the slope of the fatigue curve in the area with the number of cycles exceeding 10<sup>7</sup>. A comparison of equivalent loading parameters obtained using the proposed approach with a shadow-method schematization demonstrated satisfactory results.</p>","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139376272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-05DOI: 10.1007/s10512-023-01026-y
L. A. Karpyuk, V. I. Kuznetsov, V. V. Novikov, E. N. Mikheev, A. V. Fedotov, A. V. Lysikov, R. B. Sivov, N. M. Rysev, O. A. Bakhteev, M. A. Lutkov
The study aims to determine the corrosion stability of triuranium disilicide pellets under the conditions similar to small-nuclear plant (SNPP) modes. For this, corrosion tests were carried out in comparison with uranium dioxide in zirconium mini-autoclaves with distilled (deionized) water at a pressure of 16.2 MPa using a Nabertherm muffle furnace (Germany) at a temperature of 331 ± 3 °C and isothermal exposure of 4 and 10 h. The temperature of isothermal sections was calibrated and controlled using a rhenium-tungsten thermocouple located near the mini-autoclaves. After a 4h exposure, the surface of the triuranium disilicide sample was slightly oxidized without destruction. After 10 h, it was oxidized with a slight detachment of fine particles. The mass gain of the sample together with exfoliated fine particles comprised 0.5% (25 mg). No uranium dioxide was detected on the standard fuel pellet under these oxidation modes.
{"title":"Corrosion tests of triuran disilicide fuel pellets","authors":"L. A. Karpyuk, V. I. Kuznetsov, V. V. Novikov, E. N. Mikheev, A. V. Fedotov, A. V. Lysikov, R. B. Sivov, N. M. Rysev, O. A. Bakhteev, M. A. Lutkov","doi":"10.1007/s10512-023-01026-y","DOIUrl":"https://doi.org/10.1007/s10512-023-01026-y","url":null,"abstract":"<p>The study aims to determine the corrosion stability of triuranium disilicide pellets under the conditions similar to small-nuclear plant (SNPP) modes. For this, corrosion tests were carried out in comparison with uranium dioxide in zirconium mini-autoclaves with distilled (deionized) water at a pressure of 16.2 MPa using a Nabertherm muffle furnace (Germany) at a temperature of 331 ± 3 °C and isothermal exposure of 4 and 10 h. The temperature of isothermal sections was calibrated and controlled using a rhenium-tungsten thermocouple located near the mini-autoclaves. After a 4h exposure, the surface of the triuranium disilicide sample was slightly oxidized without destruction. After 10 h, it was oxidized with a slight detachment of fine particles. The mass gain of the sample together with exfoliated fine particles comprised 0.5% (25 mg). No uranium dioxide was detected on the standard fuel pellet under these oxidation modes.</p>","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139376046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-22DOI: 10.1007/s10512-023-01023-1
S. Dmitriev, T. D. Demkina, A. Dobrov, D. Doronkov, D. S. Doronkova, D. D. Kuritsyn, M. Legchanov, A. Pronin, A. Ryazanov, D. Solntsev, D. L. Shipov
{"title":"Flow formation features at the inlet to the fuel catridge of a ritm snpp reactor","authors":"S. Dmitriev, T. D. Demkina, A. Dobrov, D. Doronkov, D. S. Doronkova, D. D. Kuritsyn, M. Legchanov, A. Pronin, A. Ryazanov, D. Solntsev, D. L. Shipov","doi":"10.1007/s10512-023-01023-1","DOIUrl":"https://doi.org/10.1007/s10512-023-01023-1","url":null,"abstract":"","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138945061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-21DOI: 10.1007/s10512-023-01034-y
D. Desyatov, A. Ekidin, S. G. Goliboroda
{"title":"Release of radioactive cesium to the environment during standard npp operations","authors":"D. Desyatov, A. Ekidin, S. G. Goliboroda","doi":"10.1007/s10512-023-01034-y","DOIUrl":"https://doi.org/10.1007/s10512-023-01034-y","url":null,"abstract":"","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138950597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-21DOI: 10.1007/s10512-023-01035-x
I. A. Kirillov, N. L. Kharitonova, V. A. Simonenko, V. M. Kryukov
{"title":"Development of approaches to regulatory safety in industrial water-electrolysis production of hydrogen at NPPs","authors":"I. A. Kirillov, N. L. Kharitonova, V. A. Simonenko, V. M. Kryukov","doi":"10.1007/s10512-023-01035-x","DOIUrl":"https://doi.org/10.1007/s10512-023-01035-x","url":null,"abstract":"","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138951555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-21DOI: 10.1007/s10512-023-01032-0
A. S. Gryaznov, E. A. Ivanov, A. S. Korotkov, S. S. Selkin, L. E. Sukhikh, D. A. Sharov
{"title":"Scientific and practical aspects of a radiation inspection for a decommissioned NPP unit","authors":"A. S. Gryaznov, E. A. Ivanov, A. S. Korotkov, S. S. Selkin, L. E. Sukhikh, D. A. Sharov","doi":"10.1007/s10512-023-01032-0","DOIUrl":"https://doi.org/10.1007/s10512-023-01032-0","url":null,"abstract":"","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138951432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-21DOI: 10.1007/s10512-023-01022-2
M. Kormilitsyn, L. A. Kormilitsyna, Ya. A. Kotov, V. Nevinitsa, S. B. Pustovalov, A. A. Sedov, S. S. Simonov, S. Subbotin, P. Fomichenko
{"title":"Analysis of fuel cycle scenarios for a two-unit SCWR NPP","authors":"M. Kormilitsyn, L. A. Kormilitsyna, Ya. A. Kotov, V. Nevinitsa, S. B. Pustovalov, A. A. Sedov, S. S. Simonov, S. Subbotin, P. Fomichenko","doi":"10.1007/s10512-023-01022-2","DOIUrl":"https://doi.org/10.1007/s10512-023-01022-2","url":null,"abstract":"","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-20DOI: 10.1007/s10512-023-01019-x
O. I. Chertovskikh, A. A. Belov, O. N. Andrianova
Features and capabilities of the SUN BPSD module for assessing the error in fuel burnup calculations due to the uncertainty of nuclear data and reactor plant process parameters, as well as fuel irradiation conditions, are described. Using the SUN module, two different methods for estimating the uncertainty of irradiated fuel characteristics were implemented. The post-reactor studies of fuel rods irradiated in a BN-350 reactor with mixed uranium-plutonium oxide fuel were considered as a demonstration calculation test using the SUN module.
{"title":"Uncertainty Assessment and Sensitivity Analysis in the Problems of Nuclide Kinetic Modeling Using the Sun Module of BPSD Software","authors":"O. I. Chertovskikh, A. A. Belov, O. N. Andrianova","doi":"10.1007/s10512-023-01019-x","DOIUrl":"10.1007/s10512-023-01019-x","url":null,"abstract":"<div><div><p>Features and capabilities of the SUN BPSD module for assessing the error in fuel burnup calculations due to the uncertainty of nuclear data and reactor plant process parameters, as well as fuel irradiation conditions, are described. Using the SUN module, two different methods for estimating the uncertainty of irradiated fuel characteristics were implemented. The post-reactor studies of fuel rods irradiated in a BN-350 reactor with mixed uranium-plutonium oxide fuel were considered as a demonstration calculation test using the SUN module.</p></div></div>","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-20DOI: 10.1007/s10512-023-01007-1
D. M. Arkhangelsky, D. S. Oleynik
The results of calculating the βeff effective fraction of delayed neutrons and the Λ lifetime of prompt neutrons, both when taking into account and excluding the value function, are presented. The analysis, concerning the effects of accounting for the neutron value function at various degrees of its expansion, as well as depending on the physical and geometric parameters of the system, is conducted. The calculations were performed for twelve experiments from the ICSBEP collection. The analysis of the results states the necessity of accounting for the value function in small systems with a reflector and a large number of neutrons. No accounting for the value function is required for estimating the kinetic functionals in systems that are close to infinite.
{"title":"Study of Effects Caused by the Neutron Value Function on Kinetic Functionals Using the MCU Software","authors":"D. M. Arkhangelsky, D. S. Oleynik","doi":"10.1007/s10512-023-01007-1","DOIUrl":"10.1007/s10512-023-01007-1","url":null,"abstract":"<div><div><p>The results of calculating the β<sub>eff</sub> effective fraction of delayed neutrons and the Λ lifetime of prompt neutrons, both when taking into account and excluding the value function, are presented. The analysis, concerning the effects of accounting for the neutron value function at various degrees of its expansion, as well as depending on the physical and geometric parameters of the system, is conducted. The calculations were performed for twelve experiments from the ICSBEP collection. The analysis of the results states the necessity of accounting for the value function in small systems with a reflector and a large number of neutrons. No accounting for the value function is required for estimating the kinetic functionals in systems that are close to infinite.</p></div></div>","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-20DOI: 10.1007/s10512-023-01011-5
V. I. Malkovsky
The paper analyzes the effect of tectonic activity on the safety of the geological repository at the Yeniseisky radioactive waste (RW) repository (Nizhnekansky massif, Krasnoyarsk Krai) in the event of the formation of faults in the host rocks following the loading of wastes into the repository. A 3D model of the radioactive contamination transfer from the repository by groundwater is considered, taking into account the inhomogeneous permeability of rocks. The orientation and location of the faults are set based on the modeled stress-strain state of the rocks in this area, as well as data obtained from field and spatial surveys on contemporary tectonic activity in the considered area. Submeridional faults were demonstrated to have no significant effect on the spread rate of the radioactive contamination. However, the activation of the most probable latitudinal fault may lead to the rapid movement of contaminated groundwater in the fault zone towards the Yenisei. The efficacy of plugging various areas in the sublatitudinal fault zone to reduce the migration rate of contaminating radionuclides is considered.
{"title":"Effects of Tectonic Faults on the Safety of a Geological Repository at the Yeniseysky Site","authors":"V. I. Malkovsky","doi":"10.1007/s10512-023-01011-5","DOIUrl":"10.1007/s10512-023-01011-5","url":null,"abstract":"<div><div><p>The paper analyzes the effect of tectonic activity on the safety of the geological repository at the Yeniseisky radioactive waste (RW) repository (Nizhnekansky massif, Krasnoyarsk Krai) in the event of the formation of faults in the host rocks following the loading of wastes into the repository. A 3D model of the radioactive contamination transfer from the repository by groundwater is considered, taking into account the inhomogeneous permeability of rocks. The orientation and location of the faults are set based on the modeled stress-strain state of the rocks in this area, as well as data obtained from field and spatial surveys on contemporary tectonic activity in the considered area. Submeridional faults were demonstrated to have no significant effect on the spread rate of the radioactive contamination. However, the activation of the most probable latitudinal fault may lead to the rapid movement of contaminated groundwater in the fault zone towards the Yenisei. The efficacy of plugging various areas in the sublatitudinal fault zone to reduce the migration rate of contaminating radionuclides is considered.</p></div></div>","PeriodicalId":480,"journal":{"name":"Atomic Energy","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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