Kalsi Valve & Actuator Program — The AOV Software with Technology

Main Menu showing the variety of common linear and quarter- turn valves and actuators that KVAP is capable of evaluating

KVAP™ Product Description

KVAP™, the Kalsi Valve & Actuator Program, is a state-of-the-art software that efficiently performs reliable design basis calculations for all common types of globe, gate, diaphragm, butterfly, ball, and plug valves as well as linear and quarter-turn actuators used in AOV and MOV applications.

A number of utilities, while implementing their AOV programs, found that the industry was lacking validated models for predicting performance of many types of AOVs used in safety-related applications. To address this major generic industry-wide need, Kalsi Engineering, Inc. initiated a comprehensive flow loop testing program which led to the development of improved and validated methodologies that accurately predict torque requirements for all types of quarter-turn valves prevalent in AOV applications.

The KVAP software and its extensive database capabilities incorporate the new validated models for quarter-turn valves developed under this program. KVAP also includes industry-established models for all other common types of globe, gate, and diaphragm valves and actuators to offer a complete software package for AOV and MOV calculations.

All testing, analytical model development, software development, and verification and validation activities were performed under the Kalsi Engineering, Inc. quality assurance program, which meets 10CFR50 Appendix B requirements.

The improved models in KVAP represent a significant advancement in the valve prediction methodologies, which can eliminate unnecessary equipment modification and provide an alternative to expensive dynamic testing as a means of demonstrating valve operability.

KVAP was developed by Kalsi Engineering, Inc., which is recognized as the leader in the industry to support utilities in their AOV, MOV, and check valve programs.

KVAP Software Capabilities

The Kalsi Valve & Actuator Program is a state-of-the-art software that efficiently performs reliable design basis calculations for all common types of globe, gate, diaphragm, butterfly, ball, and plug valves as well as linear and quarter-turn actuators used in AOV and MOV applications.

KVAP is the only AOV software in the industry that includes a number of new validated models based on first principles supported by extensive CFD analyses and 10CFR50 Appendix B testing. These new models are applicable to several types of valves that are common to AOV applications which had not been addressed by the EPRI MOV PPM, JOG AOV, NSSS Owners Groups, valve manufacturers, or other organizations marketing competing software.

KVAP includes a comprehensive database of 10CFRR50 Appendix B test results to accurately predict torque/thrust requirements for various types of AOVs under design basis conditions. The flow loop test matrix to support KVAP development and validation included over 2,000 static and dynamic tests to cover variations in valve/disc geometry, elbow orientation, elbow distance, fluid type, flow direction, flow rates, and maximum DP. KVAP provides geometry-specific torque and flow coefficients for baseline conditions and for elbow effects.

In many AOV applications, the new KVAP models for quarter-turn valves provide a substantial increase in margin between valve requirements and actuator capabilities, thus eliminating unnecessary equipment modifications. The KVAP database and the more accurate models have already demonstrated substantial cost savings for the plants.

From inception, KVAP software development was planned with a well-structured modular approach to minimize the cost and time associated with the V&V effort for upgrades and revisions. This ensures that new data and improvements to address emerging industry issues for AOVs can be efficiently incorporated, verified, and validated in KVAP.

The KVAP software input and output screens are heavily supported by graphics that illustrate critical features and dimensions of the valve being analyzed, valve orientation, flow direction, elbow orientation, required valve thrust/torque throughout the stroke, minimum and maximum actuator capability throughout the stroke, and margin throughout the stroke. This user-friendly graphic interface eliminates mistakes and errors commonly made during AOV calculations.

KVAP was developed by a team of Kalsi senior specialists who are recognized as leaders in the industry for technological advances in AOV's, MOV's, and check valves. Our specialists have more than 20 years of continuous involvement in R&D to develop validated first principles models and software for valves and actuators to address generic industry-wide issues, including the EPRI MOV Performance Prediction Program and MOV guides. This experience is supplemented by performing design basis calculations and implementing AOV, MOV, and Check Valve programs at more than 30 power plants.

KVAP Scope of Valves and Actuators

KVAP software is capable of evaluating the following types of valves and actuators used in AOVs and MOVs. These cover all common types of AOVs used in the U.S. nuclear power plants.

Linear Valves

  • Unbalanced disc globe valves
  • Balanced disc, cage-guided globe valves
  • Balanced, double disc globe valves
  • Pilot balanced disc globe valves
  • Three-way globe valves (diverging and converging)
  • Diaphragm valves
  • Gate valves (flexible, solid wedge)

Quarter-Turn Valves

  • Symmetric disc butterfly valves
  • Single-offset disc butterfly valves
  • Double-offset disc butterfly valves
  • Spherical ball valves – floating ball
  • Spherical ball valves – trunnion mounted
  • Partial/segmented ball valves (e.g., Fisher V-notch)
  • Plug valves
  • Eccentric plug valves (e.g., Masoneilan Camflex)

Linear & Quarter-Turn Actuators

Actuator Type Actuator Design
Cylinder Double-acting, double-acting with double-ended, double-acting with spring, and single-acting with spring
Diaphragm Single-acting with spring
Scotch Yoke Double-acting and single-acting with spring
Rack & Pinion Double-acting and single-acting with spring
Cylinder with Linkage (Types 1 & 2) Double-acting and single-acting with spring
Diaphragm with Lever Double-acting and single-acting with spring
Electric Motor Limitorque and Rotork with quarter turn gear operator

Other KVAP Features/Capabilities

  • Analyzes incompressible, compressible, choking, flashing flow
  • Includes valve geometry-specific upstream elbow effect coefficients for butterfly, ball, eccentric plug, and plug valves
  • Evaluates mid-stroke margins
  • Provides extremely user-friendly, intuitive graphical user interface and comprehensive database capabilities
  • Well planned modular structure for efficient V&V to support upgrades/new capabilities
  • Operates on Windows operating systems

Applications, Advantages, and Benefits

  • Performs reliable AOV valve and actuator design basis calculations, including minimum required thrust/torque, actuator capabilities and margin
  • Eliminates the need for dynamic DP testing, saving tens of thousands of dollars per valve
  • Provides models for double-offset butterfly, full ball, segmented ball, eccentric plug, and plug valves, for which no validated models were available in the industry
  • Eliminates excessive conservatism in EPRI PPM models; increases margin
  • Eliminates unnecessary equipment modifications and/or repeat calculations to address low/negative margins
  • Extremely intuitive, user-friendly graphical interface improves efficiency and eliminates errors
  • Troubleshoots valve performance problems

Quality Assurance

  • Meets 10CFR50 Appendix B requirements

Training, Technical Support & Upgrades

  • Comprehensive KVAP, AOV, and MOV training seminars
  • Technical support & upgrades for emerging issues

KVAP Licensing options

There are several options for licensing KVAP:

  • Full KVAP
  • KVAP with Electric Motor Actuator
  • KVAP AOV Setup Utility

The price for each option depends upon the number of licenses purchased by the utility. For specific cost information for your need, please contact Dr. M.S. Kalsi or P.D. Alvarez  at 281-240-6500.

KVAP Overview in PDF format (left click to view, right click to download)

 

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