Home | Services | Projects | Profiles | Consultants | Papers | Applications | Contact Us

Technical Papers

Inquiry of these papers can be direct your request to mdong@unisont.com
Here are some of our technical papers:
  
  • "Study of the Effects of Environment in the Fatigue Analysis on Existing LWR As Proposed in USNRC RG 1.207", PVP 2009-77915, 2009.  
  • "Seismic Analysis of a Buried Jacket Piping System", ICONE-11, 2003.
  • "A Complete Piping Analysis with Thermal Stratification Loads", ICONE-10, 2002.
  • "Dynamic Load Analyzer in Structural Analysis", PVP-426, 2001.
  • "A Complete Water Hammer Analysis Solution Using HSTA and ME101", PVP-426, 2001.
  • "Design Guide for Cold Pipe Support Spacing and Support Loads", the 10th Pacific Basic Nuclear Conference, Kobe, Japan, 1996.
  • "Assessment of Stress Indices and Stress Intensification Factor for Un-reinforced Fabricated Tees", PVP 275-1, 1994.
  • "Automation in Local Stress Evaluation for Pipe Support and Pipe Attachment", PVP 256-1, 1993.
  • "An Efficient Method for Dynamic Analysis of a Linearly Elastic Piping System with Nonlinear Supports",PVP-187, 1990.
  • "Rigid Range Correction in Dynamic Transient Analysis", PVP-182, 1989.
  • "Correlation of Various Response Spectrum Methods with Time History Analysis for a Tuned Subsystem", PVP 144, 1988.
  • "A Study of Snubber Reduction Program Using Independent Support Motion Absolute Grouping with Code Case N-411 Damping", PVP 144, 1988.
  • "Acceleration Activation Acceptance Criteria for Mechanical Snubbers", PVP 144, 1988.
  • "Energy Absorbing Support-An Alternative Piping Support System", K14/10, 9th SMiRT, 1987.
  • "Effect of Stem Stiffness and Operator Mass on Valve Dynamic Response", PVP 127, 1987.
  • "Impact Analysis for Piping Restraint Gap Effect under Dynamic Loading", PVP 127, 1987.
  • "Application of Energy Absorber as Crane Support", PVP Presentation", 1987.
  • "The Verification Basis of the ESPROSE.m Code", Nuclear Engineering and Design 189, 1999.
  • "On the Existence of Multiphase Thermal Detonation", International Journal of Multiphase Flow 25,  1999.
  • "Lower Head Integrity under Steam Explosion Loads", Nuclear Engineering and Design 189, 1999.

Area in Thermal Hydraulic by Asif H. Arastu, et. al.

  • “Fluid Transients – Analysis and Simulation of Real Life Water Hammer Events”, Paper PVP2008-61380, Presented at the 2008 Pressure Vessels & Piping Conference, July 27-31, 2008, Chicago, Illinois.
  • “FSI – Fluid Transient Loads in Nuclear Power Plant Piping Systems”, Paper ICONE16-48968, FSI Workshop, Presented at the 16th International Conference on Nuclear Engineering, May 11-15, 2008, Orlando, Florida.
  • “Water Hammer Analysis in Containment Fan Cooler Systems”, Presented at the 2005 International Congress on Advances in Nuclear Power Plants, May 15-17, 2005, Seoul, Korea.
  • “Tutorial on Water Hammer Computer Simulations”, Presented at the 2004 Forum on Fluid Transients, ASME International Mechanical Engineering Congress And Exposition, Anaheim, California, November, 2004.
  • “Water Hammer Analysis/Prevention/Mitigation in Fire Protection Systems at Power Plants”, Presented at the 4th ASME_JSME Joint Fluids Engineering Conference, FEDSM2003-45679, Water Hammer, Honolulu, Hawaii, July, 2003.
  • “Diagnostic Evaluation of a Severe Water Hammer Event in the Fire Protection System of a Nuclear Power Plant”, Proceedings of the 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM99-6891, San Francisco, California, July 1999.  Bechtel Outstanding Technical Paper Award.
  • "Analysis Of Passive Water Hammer”, Proceedings Of The ASME Fluids Engineering Division, FED-Vol. 250, ASME International Mechanical Engineering Congress And Exposition, Nashville, Tennessee, November, 1999. Bechtel Outstanding Technical Paper Award.
  • "Column Separation in Inclined Pipes”, Proceedings Of The ASME Fluids Engineering Division, FED-Vol. 247, ASME International Mechanical Engineering Congress And Exposition, Anaheim, California, November, 1998.
  • "Root Cause Analysis of Valve Failures in the Feedwater Heater Drain System”, Presented at the ASME Symposium On Cavitation And Gas-Liquid Flows In Fluid Machinery And Devices, Proceedings Of The ASME Fluid Engineering Conference & Exhibition, ASME Fluids Engineering Division Summer Meeting, San Diego, California, July, 1996.
  • "A Comprehensive Check Valve Dynamics Model for Water Hammer Applications,” Presented at the Proceedings of the ASME Fluids Engineering Division, FED-Vol. 234, ASME International Mechanical Engineering Congress and Exposition, San Francisco, California, November, 1995.
  • "Computer Models for The Analysis of Severe Water Hammer Initiating Mechanisms,” Presented in Fluid Transients, FED-Vol. 198, PVP-Vol. 291, International Mechanical Engineering Congress And Exposition, ASME, Chicago, Illinois, November, 1994.
  • "Analysis of Water Hammer Due to Loss Of Offsite Power in a Complex Service Water System with High Elevation Components,” Presented at the 7th Service Water System Reliability Improvement Seminar, EPRI, St. Louis, Missouri, June, 1994.
  • “Capability Requirements of a Service Water System Water Hammer Analysis Computer Program and its Application,” Presented at the 7th Service Water System Reliability Improvement Seminar, EPRI, St. Louis, Missouri, June, 1994.
  • “Two Phase Flow in a Passive Cooler Concept with Condensing Heat Transfer in the Presence of Non-Condensibles,” Presented at the 4th International Topical Meeting On Nuclear Thermal Hydraulics, Operations And Safety, Taipei, Taiwan, April, 1994.
  • "Expert System for Water Hammer Diagnosis in Nuclear Power Plants," Presented at the International Conference And Exhibition, Expert Systems Applications For The Electric Power Industry, Phoenix, Arizona, December, 1993.
  • "Water Hammer in Low Elevation System Due to Column Separation and Rejoining,” Presented at Unsteady Flows, PVP-Vol. 267, ASME Winter Annual Meeting, New Orleans, Louisiana, November, 1993.
  • "Water Hammer Prevention, Mitigation, And Accommodation, Volume 6: Review Of Plants Systems And Procedures," EPRI Report NP-6766, Volume 6, Research Project 2856-03, July 1992.
  • "Water Hammer Prevention, Mitigation, and Accommodation, Volume 4: Review Of Analytic Models and Computer Codes," EPRI Report NP-6766, Volume 4, Parts 1 & 2, Research Project 2856-03, July 1992.
  • “Reducing the Frequency of Water Hammer in Nuclear Power Plants,” Presented at the ASME Pressure Vessels And Piping Conference, Nashville, Tennessee, June, 1990.
  • “Systematic Methodology for Diagnosis of Water Hammer in LWR Power Plants,” Published in the Nuclear Engineering and Design Journal, 122, 1990.
  • “Water Hammer Events Under Two-Phase Flow Conditions,” Presented at the 2nd International Multiphase Fluid Transient Symposium, FED-Volume 87, ASME Winter Annual Meeting, San Francisco, California, December, 1989.
  • “Simplified Decay Heat Rejection Concept For BWR Plants,” Presented at the ASME Pressure Vessels And Piping Conference, Hawaii, July, 1989.
  • “Systematic Methodology For Diagnosis Of Water Hammer In LWR Power Plants,” Presented at the 3rd International Topical Meeting On Nuclear Power Thermal Hydraulics And Operations, Seoul, Korea, November, 1988.
  • “Generalized Application Of The Method Of Characteristics For The Analysis Of Hydraulic Transients Involving Empty Sections,” Presented at the 5th International Conference BHRA On Pressure Surges, Hannover, F. R. Germany, September, 1986.
  • “Study Of Check Valve Slamming In A BWR Feed Water System Following A Postulated Pipe Break,” Presented at the Forum On Unsteady Flow, ASME Winter Annual Meeting, Miami Beach, Florida, November, 1985.
  • “A Case Study Of A Pump-Restart Transient Involving Water Column Separation,” Presented at the 7TH International Round Table On Hydraulic Transients With Water Column Separation, IAHR-International Association For Hydraulic Research, Alvkarleby, Sweden, September, 1985.
  • “Water Hammer Loads In BWR Control Rod Drive Systems,” Presented at the Forum On Unsteady Flow, Winter Annual Meeting Of ASME, New Orleans, Louisiana, December, 1984.
  • “Analysis Of Water Hammer In Control Rod Drive Systems Of Boiling Water Reactor Nuclear Power Plants,” Presented at the 4th International BHRA Conference On Pressure Surges, Bath, England, 1983.
  • "Flow Data For The Thermal Design Of Gas-Cooled Porous Fuel Elements," Presented at the 6th International Heat Transfer Conference, Toronto, Canada, August, 1978.

1988 Outstanding Technical Paper - Correlation of Various Response Spectrum Methods with Time History Analysis for a Tuned Subsystem

1994 Technical Grant - Hanger Auto Located and Optimized System

Unisont Engineering, Inc. * 333 Hegenberger Rd, #310 * Oakland, CA 94621