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  <id>https://arxiv.org/api/m9A/71G4hH6NGyarIQjqA3n6Zzk</id>
  <title>arXiv Query: search_query=abs:"pressure vessel"&amp;id_list=&amp;start=0&amp;max_results=10</title>
  <updated>2026-06-13T21:57:59Z</updated>
  <link href="https://arxiv.org/api/query?search_query=abs:%22pressure+vessel%22&amp;start=0&amp;max_results=10&amp;id_list=" type="application/atom+xml"/>
  <opensearch:itemsPerPage>10</opensearch:itemsPerPage>
  <opensearch:totalResults>89</opensearch:totalResults>
  <opensearch:startIndex>0</opensearch:startIndex>
  <entry>
    <id>http://arxiv.org/abs/1209.2405v1</id>
    <title>A Survey of Pressure Vessel Code Compliance for Superconducting RF Cryomodules</title>
    <updated>2012-09-11T19:34:46Z</updated>
    <link href="https://arxiv.org/abs/1209.2405v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/1209.2405v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>Superconducting radio frequency (SRF) cavities made from niobium and cooled with liquid helium are becoming key components of many particle accelerators. The helium vessels surrounding the RF cavities, portions of the niobium cavities themselves, and also possibly the vacuum vessels containing these assemblies, generally fall under the scope of local and national pressure vessel codes. In the U.S., Department of Energy rules require national laboratories to follow national consensus pressure vessel standards or to show "a level of safety greater than or equal to" that of the applicable standard. Thus, while used for its superconducting properties, niobium ends up being treated as a low-temperature pressure vessel material. Niobium material is not a code listed material and therefore requires the designer to understand the mechanical properties for material used in each pressure vessel fabrication; compliance with pressure vessel codes therefore becomes a problem. This report summarizes the approaches that various institutions have taken in order to bring superconducting RF cryomodules into compliance with pressure vessel codes.</summary>
    <category term="physics.acc-ph" scheme="http://arxiv.org/schemas/atom"/>
    <published>2012-09-11T19:34:46Z</published>
    <arxiv:comment>7 pp</arxiv:comment>
    <arxiv:primary_category term="physics.acc-ph"/>
    <author>
      <name>Thomas Peterson</name>
      <arxiv:affiliation>Fermilab</arxiv:affiliation>
    </author>
    <author>
      <name>Arkadiy Klebaner</name>
      <arxiv:affiliation>Fermilab</arxiv:affiliation>
    </author>
    <author>
      <name>Tom Nicol</name>
      <arxiv:affiliation>Fermilab</arxiv:affiliation>
    </author>
    <author>
      <name>Jay Theilacker</name>
      <arxiv:affiliation>Fermilab</arxiv:affiliation>
    </author>
    <author>
      <name>Hitoshi Hayano</name>
      <arxiv:affiliation>KEK, Tsukuba</arxiv:affiliation>
    </author>
    <author>
      <name>Eiji Kako</name>
      <arxiv:affiliation>KEK, Tsukuba</arxiv:affiliation>
    </author>
    <author>
      <name>Hirotaka Nakai</name>
      <arxiv:affiliation>KEK, Tsukuba</arxiv:affiliation>
    </author>
    <author>
      <name>Akira Yamamoto</name>
      <arxiv:affiliation>KEK, Tsukuba</arxiv:affiliation>
    </author>
    <author>
      <name>Kay Jensch</name>
      <arxiv:affiliation>DESY</arxiv:affiliation>
    </author>
    <author>
      <name>Axel Matheisen</name>
      <arxiv:affiliation>DESY</arxiv:affiliation>
    </author>
    <author>
      <name>John Mammosser</name>
      <arxiv:affiliation>Jefferson Lab</arxiv:affiliation>
    </author>
    <arxiv:doi>10.1063/1.4707088</arxiv:doi>
    <link rel="related" href="https://doi.org/10.1063/1.4707088" title="doi"/>
  </entry>
  <entry>
    <id>http://arxiv.org/abs/2003.02057v1</id>
    <title>Investigation of Unit-1 Nuclear Reactor of the Fukushima Daiichi by Cosmic Muon Radiography</title>
    <updated>2020-03-03T03:21:53Z</updated>
    <link href="https://arxiv.org/abs/2003.02057v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/2003.02057v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>We have investigated the status of the nuclear fuel assemblies in Unit-1 reactor of the Fukushima Daiichi Nuclear Power plant by the method called Cosmic Muon Radiography. In this study, muon tracking detectors were placed outside of the reactor building. We succeeded in identifying the inner structure of the reactor complex such as the reactor containment vessel, pressure vessel, and other structures of the reactor building, through the concrete wall of the reactor building. We found that a large amount of fuel assemblies was missing in the original fuel loading zone inside the pressure vessel. It can be naturally interpreted that most of the nuclear fuel was melt and dropped down to the bottom of the pressure vessel or even below.</summary>
    <category term="physics.ins-det" scheme="http://arxiv.org/schemas/atom"/>
    <category term="hep-ex" scheme="http://arxiv.org/schemas/atom"/>
    <published>2020-03-03T03:21:53Z</published>
    <arxiv:comment>14 pages, 17 figures</arxiv:comment>
    <arxiv:primary_category term="physics.ins-det"/>
    <author>
      <name>Hirofumi Fujii</name>
      <arxiv:affiliation>High Energy Accelerator Research Organization</arxiv:affiliation>
    </author>
    <author>
      <name>Kazuhiko Hara</name>
      <arxiv:affiliation>University of Tsukuba</arxiv:affiliation>
    </author>
    <author>
      <name>Kohei Hayashi</name>
      <arxiv:affiliation>High Energy Accelerator Research Organization</arxiv:affiliation>
    </author>
    <author>
      <name>Hidekazu Kakuno</name>
      <arxiv:affiliation>Tokyo Metropolitan University</arxiv:affiliation>
    </author>
    <author>
      <name>Hideyo Kodama</name>
      <arxiv:affiliation>High Energy Accelerator Research Organization</arxiv:affiliation>
    </author>
    <author>
      <name>Kanetada Nagamine</name>
      <arxiv:affiliation>High Energy Accelerator Research Organization</arxiv:affiliation>
    </author>
    <author>
      <name>Kotaro Sato</name>
      <arxiv:affiliation>High Energy Accelerator Research Organization</arxiv:affiliation>
    </author>
    <author>
      <name>Shin-Hong Kim</name>
      <arxiv:affiliation>University of Tsukuba</arxiv:affiliation>
    </author>
    <author>
      <name>Atsuto Suzuki</name>
      <arxiv:affiliation>High Energy Accelerator Research Organization</arxiv:affiliation>
    </author>
    <author>
      <name>Takayuki Sumiyoshi</name>
      <arxiv:affiliation>Tokyo Metropolitan University</arxiv:affiliation>
    </author>
    <author>
      <name>Kazuki Takahashi</name>
      <arxiv:affiliation>University of Tsukuba</arxiv:affiliation>
    </author>
    <author>
      <name>Fumihiko Takasaki</name>
      <arxiv:affiliation>High Energy Accelerator Research Organization</arxiv:affiliation>
    </author>
    <author>
      <name>Shuji Tanaka</name>
      <arxiv:affiliation>High Energy Accelerator Research Organization</arxiv:affiliation>
    </author>
    <author>
      <name>Satoru Yamashita</name>
      <arxiv:affiliation>University of Tokyo</arxiv:affiliation>
    </author>
  </entry>
  <entry>
    <id>http://arxiv.org/abs/1609.07515v1</id>
    <title>Low Background Stainless Steel for the Pressure Vessel in the PandaX-II Dark Matter Experiment</title>
    <updated>2016-09-21T10:33:04Z</updated>
    <link href="https://arxiv.org/abs/1609.07515v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/1609.07515v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>We report on the custom produced low radiation background stainless steel and the welding rod for the PandaX experiment, one of the deep underground experiments to search for dark matter and neutrinoless double beta decay using xenon. The anthropogenic 60 Co concentration in these samples is at the range of 1 mBq/kg or lower. We also discuss the radioactivity of nuclear-grade stainless steel from TISCO which has a similar background rate. The PandaX-II pressure vessel was thus fabricated using the stainless steel from CISRI and TISCO. Based on the analysis of the radioactivity data, we also made discussions on potential candidate for low background metal materials for future pressure vessel development.</summary>
    <category term="physics.ins-det" scheme="http://arxiv.org/schemas/atom"/>
    <category term="hep-ex" scheme="http://arxiv.org/schemas/atom"/>
    <published>2016-09-21T10:33:04Z</published>
    <arxiv:primary_category term="physics.ins-det"/>
    <author>
      <name>Tao Zhang</name>
    </author>
    <author>
      <name>Changbo Fu</name>
    </author>
    <author>
      <name>Xiangdong Ji</name>
    </author>
    <author>
      <name>Jianglai Liu</name>
    </author>
    <author>
      <name>Xiang Liu</name>
    </author>
    <author>
      <name>Xuming Wang</name>
    </author>
    <author>
      <name>Chunfa Yao</name>
    </author>
    <author>
      <name>Xunhua Yuan</name>
    </author>
    <arxiv:doi>10.1088/1748-0221/11/09/T09004</arxiv:doi>
    <link rel="related" href="https://doi.org/10.1088/1748-0221/11/09/T09004" title="doi"/>
  </entry>
  <entry>
    <id>http://arxiv.org/abs/2308.09786v1</id>
    <title>Mechanical design of the optical modules intended for IceCube-Gen2</title>
    <updated>2023-08-18T19:20:09Z</updated>
    <link href="https://arxiv.org/abs/2308.09786v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/2308.09786v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>IceCube-Gen2 is an expansion of the IceCube neutrino observatory at the South Pole that aims to increase the sensitivity to high-energy neutrinos by an order of magnitude. To this end, about 10,000 new optical modules will be installed, instrumenting a fiducial volume of about 8 km^3. Two newly developed optical module types increase current sensitivity per module by a factor of three by integrating 16 and 18 newly developed four-inch PMTs in specially designed 12.5-inch diameter pressure vessels. Both designs use conical silicone gel pads to optically couple the PMTs to the pressure vessel to increase photon collection efficiency. The outside portion of gel pads are pre-cast onto each PMT prior to integration, while the interiors are filled and cast after the PMT assemblies are installed in the pressure vessel via a pushing mechanism. This paper presents both the mechanical design, as well as the performance of prototype modules at high pressure (70 MPa) and low temperature (-40 degree Celsius), characteristic of the environment inside the South Pole ice.</summary>
    <category term="astro-ph.IM" scheme="http://arxiv.org/schemas/atom"/>
    <category term="astro-ph.HE" scheme="http://arxiv.org/schemas/atom"/>
    <published>2023-08-18T19:20:09Z</published>
    <arxiv:comment>Presented at the 38th International Cosmic Ray Conference (ICRC2023). See arXiv:2307.13048 for all IceCube-Gen2 contributions</arxiv:comment>
    <arxiv:primary_category term="astro-ph.IM"/>
    <author>
      <name>Yuya Makino</name>
      <arxiv:affiliation>for the IceCube-Gen2 Collaboration</arxiv:affiliation>
    </author>
  </entry>
  <entry>
    <id>http://arxiv.org/abs/0804.0261v1</id>
    <title>Circulation in Blowdown Flows</title>
    <updated>2008-04-01T22:22:32Z</updated>
    <link href="https://arxiv.org/abs/0804.0261v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/0804.0261v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>  The blowdown of high pressure gas in a pressure vessel produces rapid adiabatic cooling of the gas remaining in the vessel. The gas near the wall is warmed by conduction from the wall, producing radial temperature and density gradients that affect the flow, the mass efflux rate and the thermodynamic states of both the outflowing and the contained gas. The resulting buoyancy-driven flow circulates gas through the vessel and reduces, but does not eliminate, these gradients. The purpose of this note is to estimate when blowdown cooling is rapid enough that the gas in the pressure vessel is neither isothermal nor isopycnic, though it remains isobaric. I define a dimensionless number, the buoyancy circulation number BC, that parametrizes these effects.</summary>
    <category term="physics.flu-dyn" scheme="http://arxiv.org/schemas/atom"/>
    <published>2008-04-01T22:22:32Z</published>
    <arxiv:comment>5 pp., no figures</arxiv:comment>
    <arxiv:primary_category term="physics.flu-dyn"/>
    <arxiv:journal_ref>J. Pressure Vessel Tech. 131, 034501 (2009)</arxiv:journal_ref>
    <author>
      <name>J. I. Katz</name>
    </author>
  </entry>
  <entry>
    <id>http://arxiv.org/abs/1204.0234v1</id>
    <title>Substantiation of Thermodynamic Criteria of Explosion Safety in Process of Severe Accidents in Pressure Vessel Reactors</title>
    <updated>2012-03-27T11:21:14Z</updated>
    <link href="https://arxiv.org/abs/1204.0234v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/1204.0234v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>The paper represents original development of thermodynamic criteria of occurrence conditions of steam-gas explosions in the process of severe accidents. The received results can be used for modelling of processes of severe accidents in pressure vessel reactors.</summary>
    <category term="physics.gen-ph" scheme="http://arxiv.org/schemas/atom"/>
    <published>2012-03-27T11:21:14Z</published>
    <arxiv:comment>5 pages, 1 figure</arxiv:comment>
    <arxiv:primary_category term="physics.gen-ph"/>
    <author>
      <name>V. I. Skalozubov</name>
    </author>
    <author>
      <name>V. N. Vashchenko</name>
    </author>
    <author>
      <name>S. S. Jarovoj</name>
    </author>
    <author>
      <name>V. Yu. Kochnyeva</name>
    </author>
  </entry>
  <entry>
    <id>http://arxiv.org/abs/2511.11485v1</id>
    <title>Data-efficient U-Net for Segmentation of Carbide Microstructures in SEM Images of Steel Alloys</title>
    <updated>2025-11-14T17:01:02Z</updated>
    <link href="https://arxiv.org/abs/2511.11485v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/2511.11485v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>Understanding reactor-pressure-vessel steel microstructure is crucial for predicting mechanical properties, as carbide precipitates both strengthen the alloy and can initiate cracks. In scanning electron microscopy images, gray-value overlap between carbides and matrix makes simple thresholding ineffective. We present a data-efficient segmentation pipeline using a lightweight U-Net (30.7~M parameters) trained on just \textbf{10 annotated scanning electron microscopy images}. Despite limited data, our model achieves a \textbf{Dice-Sørensen coefficient of 0.98}, significantly outperforming the state-of-the-art in the field of metallurgy (classical image analysis: 0.85), while reducing annotation effort by one order of magnitude compared to the state-of-the-art data efficient segmentation model. This approach enables rapid, automated carbide quantification for alloy design and generalizes to other steel types, demonstrating the potential of data-efficient deep learning in reactor-pressure-vessel steel analysis.</summary>
    <category term="cs.LG" scheme="http://arxiv.org/schemas/atom"/>
    <category term="cond-mat.mtrl-sci" scheme="http://arxiv.org/schemas/atom"/>
    <published>2025-11-14T17:01:02Z</published>
    <arxiv:primary_category term="cs.LG"/>
    <arxiv:journal_ref>Machine Learning and the Physical Sciences Workshop @ NeurIPS 2025 https://openreview.net/forum?id=xYY5pn4f8N</arxiv:journal_ref>
    <author>
      <name>Alinda Ezgi Gerçek</name>
    </author>
    <author>
      <name>Till Korten</name>
    </author>
    <author>
      <name>Paul Chekhonin</name>
    </author>
    <author>
      <name>Maleeha Hassan</name>
    </author>
    <author>
      <name>Peter Steinbach</name>
    </author>
  </entry>
  <entry>
    <id>http://arxiv.org/abs/2511.09689v1</id>
    <title>An ASME-Compliant Helium-4 Evaporation Refrigerator for the SpinQuest Experiment</title>
    <updated>2025-11-12T19:45:47Z</updated>
    <link href="https://arxiv.org/abs/2511.09689v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/2511.09689v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>This paper presents the design, safety basis, and commissioning results of a 1 K liquid helium-4 (4He) evaporation refrigerator developed for the Fermilab SpinQuest Experiment (E1039). The system represents the first high power helium evaporation refrigerator operated in a fixed target scattering experiment at Fermilab and was engineered to comply with the Fermilab ES\&amp;H Manual (FESHM) requirements governing pressure vessels, piping, cryogenic systems, and vacuum vessels. The design is mapped to ASME B31.3 (Process Piping) and the ASME Boiler and Pressure Vessel Code (BPVC) for pressure boundary integrity and overpressure protection, with documented compliance to FESHM Chapters 5031 (Pressure Vessels), 5031.1 (Piping Systems), and 5033 (Vacuum Vessels). This work documents the methodology used to reach compliance and approval for the 4He evaporation refrigerator at Fermilab which the field lacks. Design considerations specific to the high radiation target-cave environment including remotely located instrumentation approximately 20 m from the cryostat are summarized, together with the relief-system sizing methodology used to accommodate transient heat loads from dynamic nuclear polarization microwaves and the high-intensity proton beam. Commissioning data from July 2024 confirms that the system satisfies all thermal performance and safety objectives.</summary>
    <category term="physics.ins-det" scheme="http://arxiv.org/schemas/atom"/>
    <published>2025-11-12T19:45:47Z</published>
    <arxiv:comment>For IEEE Transactions in Nuclear Physics, 11 pages, 14 figures</arxiv:comment>
    <arxiv:primary_category term="physics.ins-det"/>
    <author>
      <name>Jordan D. Roberts</name>
    </author>
    <author>
      <name>Vibodha Bandara</name>
    </author>
    <author>
      <name>Kenichi Nakano</name>
    </author>
    <author>
      <name>Dustin Keller</name>
    </author>
  </entry>
  <entry>
    <id>http://arxiv.org/abs/1507.04072v1</id>
    <title>High-Voltage Terminal Test of Test Stand for 1-MV Electrostatic Accelerator</title>
    <updated>2015-07-15T02:41:11Z</updated>
    <link href="https://arxiv.org/abs/1507.04072v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/1507.04072v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>The Korea Multipurpose Accelerator Complex (KOMAC) has been developing a 300-kV test stand for a 1-MV electrostatic accelerator ion source. The ion source and accelerating tube will be installed in a high-pressure vessel. The ion source in the high-pressure vessel is required to have a high reliability. The test stand has been proposed and developed to confirm the stable operating conditions of the ion source. The ion source will be tested at the test stand to verify the long-time operating conditions. The test stand comprises a 300-kV high-voltage terminal, a battery for the ion-source power, a 60-Hz inverter, 200-MHz RF power, a 5-kV extraction power supply, a 300-kV accelerating tube, and a vacuum system. The results of the 300-kV high-voltage terminal tests are presented in this paper.</summary>
    <category term="physics.acc-ph" scheme="http://arxiv.org/schemas/atom"/>
    <published>2015-07-15T02:41:11Z</published>
    <arxiv:comment>International Conference on Accelerators and Beam Utilization (ICABU2014)</arxiv:comment>
    <arxiv:primary_category term="physics.acc-ph"/>
    <arxiv:journal_ref>Yong-Sub Cho KNS (2014); W. Sima IEEE (2004) 480-483; LA-UR-87-126 (1987); Jeong-tae Kim KNS (2014)</arxiv:journal_ref>
    <author>
      <name>Sae-Hoon Park</name>
    </author>
    <author>
      <name>Yu-Seok Kim</name>
    </author>
    <arxiv:doi>10.3938/jkps</arxiv:doi>
    <link rel="related" href="https://doi.org/10.3938/jkps" title="doi"/>
  </entry>
  <entry>
    <id>http://arxiv.org/abs/2005.05585v1</id>
    <title>Investigation of the Status of Unit 2 Nuclear Reactor of the Fukushima Daiichi by the Cosmic Muon Radiography</title>
    <updated>2020-05-12T07:26:37Z</updated>
    <link href="https://arxiv.org/abs/2005.05585v1" rel="alternate" type="text/html"/>
    <link href="https://arxiv.org/pdf/2005.05585v1" rel="related" type="application/pdf" title="pdf"/>
    <summary>We have investigated the status of the nuclear debris in the Unit-2 Nuclear Reactor of the Fukushima Daiichi Nuclear Power plant by the method called Cosmic Muon Radiography. In this measurement, the muon detector was placed outside of the reactor building as was the case of the measurement for the Unit-1 Reactor. Compared to the previous measurements, the detector was down-sized, which made us possible to locate it closer to the reactor and to investigate especially the lower part of the fuel loading zone. We identified the inner structures of the reactor such as the containment vessel, pressure vessel and other objects through the thick concrete wall of the reactor building. Furthermore, the observation showed existence of heavy material at the bottom of the pressure vessel, which can be interpreted as the debris of melted nuclear fuel dropped from the loading zone.</summary>
    <category term="physics.ins-det" scheme="http://arxiv.org/schemas/atom"/>
    <published>2020-05-12T07:26:37Z</published>
    <arxiv:comment>11 figures and 2 tables</arxiv:comment>
    <arxiv:primary_category term="physics.ins-det"/>
    <author>
      <name>Hirofumi Fujii</name>
    </author>
    <author>
      <name>Kazuhiko Hara</name>
    </author>
    <author>
      <name>Shugo Hashimoto</name>
    </author>
    <author>
      <name>Kohei Hayashi</name>
    </author>
    <author>
      <name>Hidekazu Kakuno</name>
    </author>
    <author>
      <name>Hideyo Kodama</name>
    </author>
    <author>
      <name>Gi Meiki</name>
    </author>
    <author>
      <name>Masato Mizokami</name>
    </author>
    <author>
      <name>Shinya Mizokami</name>
    </author>
    <author>
      <name>Kanetada Nagamine</name>
    </author>
    <author>
      <name>Kotaro Sato</name>
    </author>
    <author>
      <name>Shunsuke Sekita</name>
    </author>
    <author>
      <name>Hiroshi Shirai</name>
    </author>
    <author>
      <name>Shin-Hong Kim</name>
    </author>
    <author>
      <name>Takayuki Sumiyoshi</name>
    </author>
    <author>
      <name>Atsuto Suzuki</name>
    </author>
    <author>
      <name>Yoshihisa Takada</name>
    </author>
    <author>
      <name>Kazuki Takahashi</name>
    </author>
    <author>
      <name>Yu Takahashi</name>
    </author>
    <author>
      <name>Fumihiko Takasaki</name>
    </author>
    <author>
      <name>Daichi Yamada</name>
    </author>
    <author>
      <name>Satoru Yamashita</name>
    </author>
  </entry>
</feed>
