Risk-Based Design Approval Framework for Dual Fuel LNG Retrofits in Aging Fleets: An Indonesian Maritime Case Study
M. R. F. Hariadi, M. A. Kurniawan
🤖 gxceed AI 要約
日本語
老朽化した国内船隊におけるLNG二元燃料レトロフィットは、メーカー文書が不十分な場合にコンプライアンス上の空白が生じる。本論文はIGFコードの目標志向型安全目的に沿ったハザード解析により、機能的安全等価性を示すリスク基準設計承認枠組みを提案する。閉鎖空間制約下では冗長ガス検知・強制換気・自動緊急停止を組み合わせた能動的バリア戦略を、FMEA・HAZID・HAZOPで補完し、残存リスクをALARP範囲に収め概念段階のAiPを可能にする。
English
Aging domestic fleets face compliance gaps for LNG dual-fuel retrofits when manufacturer documentation is unavailable. This paper proposes a risk-based design approval framework demonstrating functional safety equivalence via hazard analysis aligned with IGF Code goal-based objectives. Applied to Indonesian retrofits, it combines active-barrier strategies (redundant gas detection, forced ventilation, emergency shutdown) with FMEA, HAZID and HAZOP to drive residual risk into ALARP range, enabling concept-stage Approval in Principle.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本は海運・造船でLNG二元燃料船の導入を進めており、老朽船レトロフィットの承認実務は国内海事GX・Class規則対応に示唆を与える。ただし開示・金融枠組みとの接続は弱く、SSBJ・有報対応への直接寄与は限定的。
In the global GX context
As IMO decarbonization targets push LNG dual-fuel adoption, this work addresses a real gap in alternative-design approval under the IGF Code, relevant to classification societies and flag states globally. It complements transition-finance and fleet-decarbonization discussions but does not engage TCFD/ISSB disclosure directly.
👥 読者別の含意
🔬研究者:海運脱炭素における目標志向型安全規制とリスク基準承認の実証事例として参照可能。
🏢実務担当者:老朽船のLNGレトロフィット検討時、メーカー保証が乏しい場合の承認エビデンス設計に活用できる。
🏛政策担当者:代替設計承認の枠組み整備やClass審査ガイドライン策定の参考になる。
📄 Abstract（原文）
Aging domestic fleets often face a compliance gap for LNG dual-fuel retrofits when manufacturer documentation is unavailable or inconclusive. This paper proposes a risk-based design approval framework that demonstrates functional safety equivalence through structured hazard analysis aligned with the goal-based safety objectives of the IGF Code. The framework is applied to representative Indonesian retrofits to show how concept-stage approval can proceed when reliance on conventional type-approval pathways is impractical. In configurations with confined-space constraints, an active-barrier strategy combining redundant gas detection, high-intensity forced ventilation, and automatic emergency shutdown is accepted as a functionally equivalent alternative to more intrusive structural solutions. To address uncertainty at the system–engine interface under limited manufacturer support, Failure Modes and Effects Analysis complements HAZID and HAZOP by verifying fail-safe behavior of control and protection functions and by documenting Risk Control Options and shutdown logic that meet the intent of the IGF objectives. The case studies contribute a class-reviewable evidence workflow derived from IGF goal-based objectives and IMO guidance on alternative design, clarifying how risk controls at the system–engine interface can be demonstrated for third-party dual-fuel retrofits in the absence of robust manufacturer assurances. The results indicate that residual risks can be driven into the ALARP or acceptable range, enabling concept-stage Approval in Principle while preserving a transparent, performance-based rationale suitable for classification review and subsequent implementation.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1115/omae2026-174239first seen 2026-10-02 05:44:54
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