critical · anode_depletion
NCS-JACKET-DEMO-001 (offshore_platform_jacket) · Leg B2 lower section anode array
Sacrificial anode array now 94% depleted (7 of 8 anodes fully consumed). Cathodic protection capacity critically below design margin per DNV-RP-B401 — accelerated free-corrosion risk on the lower jacket section.
→ Anode retrofit is now urgent — clamp-on or pile-driven supplementary anodes within 30 days; potential survey immediately.
critical · crack
NCS-JACKET-DEMO-001 (offshore_platform_jacket) · B2-C2 K-joint, brace-side weld toe
NDT-confirmed surface-breaking crack, grown from 38 mm to 54 mm length since baseline inspection. Engineering critical assessment per BS 7910 indicates the defect now exceeds acceptance criteria for continued operation without intervention.
→ Immediate engineering review; impose operational restriction or temporary clamp; grind-out and re-weld at earliest accessible window — do not defer to next planned shutdown.
critical · net_damage
DEMO-MERD-7 (illustrasjon) (aquaculture_net_pen) · Notpanel 3, ~6 m dyp
Hull i notpanel, anslått 14 mm, med løse masker rundt. Fiskepasserbar åpning — rømmingsrisiko.
→ Umiddelbar tiltak: tett/skift panel, varsle Fiskeridirektoratet. Klassifisert som vesentlig avvik (NYTEK23).
severe · anode_depletion
NCS-JACKET-DEMO-001 (offshore_platform_jacket) · Leg B2 lower section anode array
Sacrificial anode array 76% depleted (4 of 8 anodes fully consumed, 4 partially). Cathodic protection capacity below design margin per DNV-RP-B401.
→ Plan anode retrofit (clamp-on or pile-driven supplementary) before next inspection cycle; potential survey recommended within 90 days.
severe · anode_depletion
NCS-MANIFOLD-DEMO-M-08 (subsea_structure) · Primary anode array A1-A4, north side
Anode array 82% depleted across A1-A4. Exceeds DNV-RP-B401 80% threshold for subsea structures where retrofit options are limited.
→ Urgent CP retrofit design study. Anode-clamp or pile-driven supplementary anodes required before next campaign. Potential survey within 60 days to confirm protection adequacy.
severe · biofouling
IMO9876543 (vessel_hull) · Vertical sides, midship, 60-100 m from bow
IMO biofouling rating BR3-4 over ~38% of midship vertical sides. Heavy slime + barnacles + tubeworms. Consistent with extended idle period or out-of-spec anti-fouling performance.
→ Hull cleaning before next loaded leg; investigate ROV-confirmed anti-fouling depletion zones; review next drydock specifications.
severe · pitting
REFINERY-TANK-DEMO-T42 (industrial_tank) · Tank bottom plate, NE quadrant, plates B7-B9
Pitting cluster with max depth 5.4 mm across a 4.2 m² area of bottom plate. Exceeds API 653 5 mm renewal threshold. Likely under-deposit corrosion from water-bottom over service life.
→ Plate replacement at next planned shutdown; consider bottom-replacement vs internal-coating-system upgrade based on API 653 RBI analysis.
severe · erosion
NSW-BLADE-DEMO-A17-B2 (wind_turbine_blade) · Leading edge, 50-70 m from root
Leading-edge erosion estimated 32% of LEP (leading-edge-protection) coating loss over 20 m outer span. AEP loss correlation: 1.5-2.5% per DNV-RP-0573 erosion-impact curves.
→ Plan LEP reapplication at next planned maintenance window. AEP loss correction adequate to scope mid-cycle repair vs end-of-cycle.
severe · corrosion
DEMO-QUAY-K3 (harbor_quay) · Sheet pile, splash zone, K3-S22 to K3-S28
Steel sheet-pile section loss estimated 42% in splash zone, 6 m length. Approaching structural-reassessment threshold.
→ Engineering critical assessment for load-bearing capacity; plan cathodic-protection upgrade + clad-welding restoration within 12 months.
severe · corrosion
NCS-PIPELINE-DEMO-T17 (pipeline) · KP 8+420, 12 o'clock orientation
General corrosion with 58% wall-thickness loss over a 1.2 m × 0.4 m area at top-of-line. Consistent with TLC (top-of-line corrosion) signature from sour-gas service.
→ DNV-RP-F101 / B31G fitness-for-service assessment; consider pressure derating until repair scheduled; plan composite-wrap reinforcement at next inhibitor campaign.
severe · corrosion
DEMO-BRIDGE-SECTION-S3 (bridge_section) · Underside of box girder, midspan, drainage outlet
Section loss estimated 24% on primary box-girder web plating below drainage outlet. NCHRP Report 833 CS-3 (severe), approaching CS-4 (load-posting trigger).
→ Engineering critical assessment for load capacity. Plan composite-FRP wrap reinforcement; redirect drainage to prevent further damage.
severe · biofouling
DEMO-NAVAL-F-04 (naval_hull) · Vertical sides, midship, 40-80 m from bow
Biofouling estimated 22% coverage across midship vertical sides. Above naval 15% threshold — performance penalty affects top-speed reserve and acoustic signature.
→ Hull cleaning prior to next operational deployment. Review anti-fouling system performance vs spec.
severe · crack
NCS-JACKET-DEMO-001 (offshore_platform_jacket) · B2-C2 K-joint, brace-side weld toe
Surface-breaking crack, 38 mm length, oriented transverse to weld toe. Consistent with fatigue propagation per DNV-RP-C203 S-N curves for offshore tubular joints.
→ NDT confirmation (MPI/PA-UT) within 30 days; engineering critical assessment per BS 7910; plan grind-out and re-weld at next planned shutdown.
severe · marine_growth
NSW-MONOPILE-DEMO-A17 (wind_monopile) · Upper monopile 10-20 m depth band
Mussel + barnacle growth 110-140 mm thickness. Exceeds 100 mm hydrodynamic re-analysis threshold per DNV-ST-0126 + NORSOK N-003 conventions.
→ Trigger hydrodynamic load re-analysis for current fatigue assumptions; assess economic case for growth-removal campaign before next 100-year storm season.
severe · coating_breakdown
IMO9988776 (cargo_hold) · Tank top plating, starboard inner-bottom
Coating breakdown estimated 22% across tank-top plating, consistent with grab-impact abrasion from previous unloading operations. Active corrosion visible at breakdown edges.
→ Spot-blast + recoat affected zones before next loaded voyage; review cargo-handling SOPs to reduce future grab impact.
severe · coating_breakdown
IMO9776655 (ballast_tank) · Inner bottom plating, forward 1/3 of tank
IMO PSPC coating breakdown estimated 21% over forward inner-bottom area. Exceeds 10% touch-up threshold, approaching 20% area renewal trigger.
→ Schedule spot-blast + recoat at next drydock. If breakdown progresses >25% before drydock, advance scheduling.
severe · coating_breakdown
DEMO-PYLON-T-4218 (power_pylon) · Cross-arm 1, north side, members M14-M22
Hot-dip galvanizing loss estimated 68% across cross-arm north members. Active red rust visible — base steel exposed.
→ Schedule on-tower zinc-rich-paint touch-up within 12 months. If progression continues, plan tower-level re-galvanization at next outage window.
severe · corrosion
DEMO-ARENDAL-POLLEN-KAI (harbor_quay) · Stålspunt, skvalpesone, midtre seksjon
Tverrgående tykkelsestap på stålspunt i skvalpesonen, anslått 38 % over ~5 m. Aktiv rust uten intakt belegg.
→ Ingeniørvurdering av bæreevne; planlegg katodisk beskyttelse + påsveis innen 12 måneder.
severe · corrosion
NCS-JACKET-DEMO-001 (offshore_platform_jacket) · Leg B2, splash zone
UT thickness mapping confirms general corrosion accelerated to 18–21% wall-thickness loss (up from 11–13% at baseline) over the splash-zone band. Now above NORSOK N-005 severe-degradation threshold.
→ Remaining-life reassessment against design fatigue; TSA coating retrofit or splash-zone cladding at the next accessible campaign; shorten re-inspection interval.
severe · marine_growth
IMO9876543 (vessel_hull) · Propeller blades + boss
Heavy biofouling on propeller blades, with visible barnacle attachments on leading edges. Estimated 6-9% fuel-consumption penalty per typical IMO calibration curves.
→ Propeller polishing prior to next voyage; cost-recovery vs fuel savings typically <60 days.
severe · coating_breakdown
REFINERY-TANK-DEMO-T42 (industrial_tank) · Shell course 2, 360° circumferential, lower 1.5 m
Internal lining (phenolic epoxy) breakdown estimated 38% in lower shell-course-2 band. Active corrosion visible at breakdown perimeters. Consistent with end-of-life coating per design service window.
→ Full lower-shell re-lining required before next service. Scope blast-clean + epoxy phenolic system; coordinate with bottom-plate work.
severe · crack
DEMO-QUAY-K3 (harbor_quay) · Quay deck, midpoint, longitudinal crack
Longitudinal crack 2.4 mm width, 35 m length on quay deck. Above NS-EN 1992-1 immediate-review threshold (>1 mm in XS3 marine exposure).
→ Crack injection per NS-EN 1504 within 60 days; investigate substructure for differential settlement causes.
severe · coating_breakdown
NCS-JACKET-DEMO-001 (offshore_platform_jacket) · Leg B2, mid-section below splash zone
Newly detected protective-coating breakdown over a ~2.1 m² area, exposing bare steel. Not present at the baseline inspection — consistent with mechanical damage or coating-system end-of-life per NORSOK M-501.
→ Spot-blast and re-coat at next accessible campaign; monitor for corrosion initiation on exposed steel in the interim.
severe · crack
DEMO-BRIDGE-SECTION-S3 (bridge_section) · Concrete deck top, expansion joint approach slab
Concrete crack 2.1 mm width at expansion joint approach. Above NS-EN 1992-1 immediate-review threshold; chloride ingress risk in marine environment.
→ Crack injection within 30 days; replace expansion joint seal; revise inspection cycle to 6-monthly until stabilized.
severe · biofouling
DEMO-MERD-7 (illustrasjon) (aquaculture_net_pen) · Not, øvre halvdel, rundt hele merden
Begroing (hydroider + blåskjell) anslått 65 % dekning på øvre not. Øker drag og fortøyningslast og reduserer vanngjennomstrømning/oksygen.
→ Spyling/rengjøring; vurder antifouling-behandling. Følg opp deformasjon.