Engineering Services

Nuclear Analysis

Nuclear Analysis covers plant design and licensing, as well as plant operation. The basic areas include safety analysis, radiation analysis, health physics, high and low level waste management, radiation transport, occupational and public dose assessments, and preparation of safety analysis reports.

Radiation Analysis

• Accident Analysis
• Atmospheric dispersion dose assessment (normal/accident)
• Radiation transport analysis
• Shielding design and calculation
• Equipment qualification
• Habitability

Health Physics

• Radiation monitoring systems
• ALARA
• Offsite-dose calculation manual support
• Plant outage and refueling support

Nuclear Waste Management

• Liquid, solid and gaseous radwaste systems
• On-site low level waste storage
• High level waste management
• High density spent fuel storage

Thermal Fluid Analysis

Thermal Fluid analysis includes services in the area of thermodynamics, heat transfer and fluid mechanics applied in the design, engineering and licensing of nuclear plants. Activities include accident and safety analysis, system transients, system simulation for performance evaluation, steam cycle analysis and optimization, and computational fluid dynamics (CFD).

Accident and Safety Analysis

• Containment and subcompartment pressure-temperature analysis
• Engineered safety features performance evaluation
• High energy line break (HELB)

Thermal and Fluid Transients

• Water/steam hammer analysis and mitigation
• Transient loads on piping and supports
• Systems with flashing fluids
• Thermal transients Equipment qualification - thermal lag analysis

System Performance Evaluation

• Flow balance in piping networks with heat transfer
• Thermal performance of heat exchangers, air-coolers, chillers, etc.
• Computer simulation of thermal/fluid systems
• Plant cooling water and chilled water systems

Power Conversion Systems

• Steam cycle, gas turbine and combined cycle analysis
• Performance evaluation of components - condensers, heaters, moisture separators, drain tanks, etc.

Field Testing

• Performance evaluation and trouble shooting for components - pumps, heat exchangers, etc.
• System thermal/hydraulic performance evaluation for benchmarking computer models

Computational Fluid Dynamics (CFD)

• Thermal hydraulic modeling of systems and components
• Process simulation

Mechanical Services

Services in this area include HVAC and fire protection systems. Holtec has extensive experience in the analytical as well as practical aspects of these systems.

Analytical tools are developed for determining transient plant heat-up scenarios in the event of loss of cooling. Special expertise exists in the area of chilled water system performance optimization.

Structural Mechanics

Services are provided in the areas of structural dynamics, stress analysis, piping and pipe support analysis, and equipment qualification.

Structural Analysis

• Static and dynamic analysis
• Linear and nonlinear finite element analysis
• Seismic analysis of structures
• Elastic-plastic analysis

Piping Analysis

• ASME Class I/II/III and ANSI B31.1 piping qualification
• Seismic analysis
• Fluid transient loads analysis
• Finite element analysis

Pipe Support Design

• Design and analysis of pipe supports, pipe rupture restraints

Equipment Qualification

• Seismic qualification of Category I equipment components
• Fatigue Analysis
• Structural integrity - life expectancy of components
• Heat exchanger tube vibration prediction and elimination