New Start, New Standard
Bid Notice
| Bid No | 52 |
|---|---|
| Item for Bid | Development of a CVAP for APR1400 DC |
| Notice Date | 2014-05-29 |
| Deadline for Bid Submission | 2014-06-02 |
| Content |
KEPCO E&C wishes to develop a comprehensive vibration assessment program (CVAP) for the APR1400 nuclear power plant. The desired program is expected to provide for detailed analysis of potential adverse flow effects (both flow-excited acoustic resonances and flow-induced vibrations) in accordance with NRC Regulatory Guide (RG) 1.20, Rev.3. KEPCO E&C seeks technical support from a consulting company which has sufficient capabilities and experience relative to the RG and its implementation for nuclear power plant design, commissioning, and operation. The consultancy support covered by this work scope includes the development of a CVAP for the portions of the main steam (MS) and feedwater (FW) piping systems that are attached to the steam generator (SG), includingcondensate system. Note that, RG 1.20 also addresses reactor internals and SG internals. The consulting support covered by this work scope does not address the direct vibration testing, monitoring, or assessment for components internal to the reactor or SG. The work package (WP) is therefore defined as follows: A. Scope for Acoustic Resonance Evaluation The main steam (MS), feedwater (FW) (Secondary Side Pipe Line attached to the SGs, excluding SG Internal) and condensate (CD) system B. Activities 1. Flow-excited acoustic resonance analysis program 1) Performing an analysis of acoustic resonance due to attached piping, control valve, pump in the MS and FW lines using Strouhal number which is a function of stand pipe diameter & length, upstream elbows, and free stream velocity. 2. Flow-Excited Acoustic Resonance Measurement and Inspection Program 1) Identification of acoustic resonance by testing A. Acoustic resonance caused by flow past standpipes B. Acoustic resonance caused by Control Valve and Pump C. Acoustic resonance detection method - Hoop strain gauges for acoustic resonance detection (Four spaced around the circumference and longitudinally placed in at least two points of each MS and FW Line) - Constitutive equation to convert the strain gauge signal by acoustic pressure waves to the pressure amplitude and its frequency 2) Uncertainties and bias errors associated with the following: A. Acoustic frequency of the cavity B. Free stream velocity C. Branch opening diameter 3) Vibration measurement Instrumentation A. Consideration for lower frequency limit of the piping B. Choice of locations for vibration Instrumentation 4) Acceptance criteria in accordance with ASME OM-Part 3
|
| Attachments |
|