K-DELIS Reliability Engineering

• Since 2026

Reliability Expert / Consultant – CEO|Founder of K-DELIS Reliability Engineering

Main mission: Lead K‑DELIS operations and deliver support across all service areas, including RAMS studies, reliability data management, methodological and modelling expertise, business and research project management, and training

Other activities: French representative to the ISO 14224 (Reliability Data Collection) and ISO 20815 (Production Assurance) standards committees, Member of the Program Committee of ESREL and Lamda-Mu congresses.

• From 2020 to 2025

Head of RAMS activities at TotalEnergies OneTech

Main mission: Ensure the role of referent in the field of Reliability/SIL*/HIPS** studies and Production Availability Studies (PAS) and drive properly RAMS activities into all the businesses addressed by TotalEnergies OneTech (new and legacy).

*SIL = Safety Integrity Level

**HIPS = High Integrity Protection System

• From 2014 to 2020

Specialist in Reliability and Production Availability at Total S.A., Exploration-Production

Main mission: Ensure the role of competent entity to technical authority for predictive reliability of safety systems and Production Availability Studies (PAS) within Total E&P.

• From 2006 to 2014

Reliability Engineer / Consultant at Fractal Système

Main mission: Achievement of Reliability, Availability and Production Availability studies essentially for the Oil & Gas, the petrochemicals and the aeronautics industries.

Other activitivies: Lecturer on stochastic Petri nets during professional seminars in France (SAE), Trainer on GRIF-SIL module (© TotalEnergies) in France and abroad.

• ISO organisation

ISO = International Organization for Standardization

Since 2015, French representative to ISO TC67/WG4 “Oil and gas industries including lower carbon energy / Reliability Engineering and Technology” and more especially to WG4/PG1 (ISO 14224 – “Reliability data collection and exchange”) and WG4/PG2 (ISO 20815 – “Production assurance and reliability management”)

• IEC organisation

IEC = International Electrotechnical Commission

Since 2022, French representative to IEC 61508 (“Functional safety of electrical/electronic/programmable electronic safety-related systems”) and IEC 61511 (“Functional safety – Safety instrumented systems for the process industry sector”)

• OREDA JIP / OREDA CLG (www.oreda.com)

OREDA = Offshore and onshore REliability DAta

JIP = Joint Industry Project

CLG = Company Limited by Guarantee

TotalEnergies’s Representative from 2016 to 2023, and Deputy Representative in 2024 and 2025.

Chairman of the Method WorkGroup in 2016 and 2017, and Chairman of the Steering Committee from 2017 to 2023.

• IMdR

IMdR = French National Institute for Risk Management

Since 2016, Member of the Program Committee of the bi-annual French Reliability, Availability and Maintainability conference (Lambda-Mu)

Since 2015, Member of the Working Group “Methodological Research”

• ESREL

ESREL = European Safety and RELiability Conference

Since 2026, Member of the Program Committee of the annual European Safety and Reliability Conference (ESREL).

• Peer‑review contributions

From 2016 to 2020, reviewer for different international scientific journals like SIMULATION: Transactions of The Society for Modeling and Simulation International published by The Society for Modeling and Simulation International (SCS) and RESS (Reliability Engineering and System Safety) published by Elsevier in association with the European Safety and Reliability Association, and the Safety Engineering and Risk Analysis Division.

Highest degree obtained

Nicolas Clavé earned in 2005 a Master’s degree in Stochastic Modeling and Operations Research from the University of Bordeaux (France), with a specialization in Reliability Engineering.

2025

• “From theory to practice applying multistate modelling techniques to boost the efficiency of offshore wind farm projects”, JRESS-D-25-04788, Reliability Engineering & System Safety (RESS) – not published yet

2024

• “Evaluate the production availability of an offshore wind farm with a MBSA model”, Offshore Technology Conference (OTC) 2024

• “Data-driven Reliability: Insights from Field to Headquarters”, SPE-222229-MS, ADIPEC conference 2024

2023

• “Optimizing the balance between production availability, CAPEX and OPEX of projects while managing environmental aspects with a simulation tool”, SPE-216865-MS, ADIPEC conference 2023

• “Industry Application and Benefits of ISO/TR 12489 for Reliability Modelling and Calculation of Safety Systems”, Offshore Technology Conference (OTC) 2023

2022

• “Offshore & onshore REliability DAta (OREDA®) collection – OREDA JIP current challenges and presentation of the new digital handbook: OREDA@Cloud”, 5^th ISO Seminar on International Standardization in the Reliability Technology and Cost Area, Dec. 1st, 2022

• “Availability study of an installation dedicated to CO2 capture, optimization of the design and of the injection strategy via Petri nets”, 23^rd French Reliability, Availability and Maintainability conference (Lambda-Mu 23)

2020

• “Streamlining the design of existing facilities through multi-flow production availability models”, 22^nd French Reliability, Availability and Maintainability conference (Lambda-Mu 22)

2019

• “OR03: A new Bayesian estimator of failure rates to deal with heterogeneous data from the OREDA database”, European Safety and Reliability Conference (ESREL 2019)

2018

• “OR03: A new Bayesian estimator of failure rates to deal with heterogeneous data from the OREDA database”, 21^st French Reliability, Availability and Maintainability conference (Lambda-Mu 21)

2017

• “Offshore & Onshore reliability data (OREDA) collection – Snapshots from an OREDA JIP member company”, International ISO standardization seminar for the reliability technology and cost area, NEN, Delft, Netherlands

2016

• “GRIF-BOOL: Risk assessment with an analysis tool handling multiple types of Boolean modelling”, 20^th French Reliability, Availability and Maintainability conference (Lambda-Mu 20)                           

• “Uncertainties in reliability calculations according to IEC 61508 & 61511 standards”, 20^th French Reliability, Availability and Maintainability conference (Lambda-Mu 20)

• “ISO/TR 12489 – Reliability modeling and calculation of safety systems: Business case application by TOTAL”, International ISO standardization seminar for the reliability technology and cost area, Statoil Business Centre, Stavanger, Norway

2008

• “Assessment and control of the air pollution generated by an Oil & Gas production plant”, 16^th French Reliability, Availability and Maintainability conference (Lambda-Mu 16)