Near Area Active Leakage (NAAL) Subsea Leak Monitoring
Subsea leak monitoring
Monitor known areas of leakage in high resolution
Near Area Active Leakage (NAAL) System
Monitor known areas of leakage in high resolution.
Introduction
The Imenco Near Area Active Leakage (NAAL) System is used to monitor known areas of leakage in high resolution. The system utilizes multiple acoustic transducers to accurately measure the leakage rate, frequency and distribution for any change which could indicate an increasing risk of loss of containment.
NAAL can be supplied as a standalone system or as an additional component on the WAAM System. Depending on the monitoring need, a specific transducer package will be selected to ensure maximum performance in that application. NAAL Systems can be supplied with additional capability, such as low light video cameras and light sources where visual observations are of interest.
Specifications
Same specifications as for main sonar head used for long range.
The only difference is beam with:
18 degrees compared to 9 degrees on Long range.
Size: ( l x w x h) 589 x 404 x 230 mm
Weight on land:49,7 kg
Transducer spec
Options
- ES80-7CD
- Nominal frequency: 70 kHz
- Frequency range: 55 to 90 kHz
- ES120-7CD
- Nominal frequency: 120 kHz
- Frequency range: 90 to 170 kHz
- ES200-7CD
- Nominal frequency: 200 kHz
- Frequency range: 160 to 260 kHz
- ES333-7CD
- Nominal frequency: 333 kHz
- Frequency range: 280 to 450 kHz
The following specifications are valid for the nominal frequency
- Beamwidth: 18 degrees
- Figure of merit: –12 dB
- Max. source level: 216 dB
- Transmit sensitivity (Su): 178 dB
- Receive sensitivity (Mt): –190 dB
- Sidelobelevel: –18 dB
- Back radiation level: –30 dB
- Impedance (each sector): 60 Ω