Risk analysis study for wall washing test (WWT) applied to chemical cargo tanks.

Year 2023, Volume: 4 Issue: 2, 172 - 186, 31.12.2023

Mehmet Kaptan

https://doi.org/10.53501/rteufemud.1362325

Abstract

High sensitivity must be shown during the transportation of chemical cargoes due to their flammability, toxicity, purity and incompatibility with each other. Therefore, one of the most crucial procedures in chemical tankers is cleaning the tanks of cargo residues and getting them ready for loading the cargo. Inspection of the tank's suitability for the loading is first performed by a wall wash test (WWT). Evaluation of the errors made during WWT application is essential to prevent cargo contamination with costly consequences. In this study, the risks associated with the application of WWT are analyzed using the Bayes technique in a fuzzy environment. The Bayesian network is used to detect hazards and calculate the probabilities of contributing sub-causes, while fuzzy logic is utilized to quantify the uncertainty in risk assessment. The paper provides practical contributions to all maritime stakeholders in assessing and preventing risks in WWT to the contamination problem, which is one of the most critical problems of chemical tanker transport.

Keywords

Wall washing test, Chemical tanker, Fuzzy bayesian networks, Contamination

Kimyasal Kargo Tankına Uygulanan Duvar Yıkama Testine İlişkin Risk Analizi Çalışması

Abstract

Kimyasal yüklerin taşınması sırasında yanıcılığı, toksisitesi, saflığı ve birbiriyle uyumsuzluğu nedeniyle yüksek hassasiyet gösterilmesi gerekmektedir. Bu nedenle kimyasal tankerlerde en önemli işlemlerden biri tankların yük kalıntılarından temizlenmesi ve yük yüklemeye hazır hale getirilmesidir. Tankın yüklemeye uygunluğunun kontrolü öncelikle duvar yıkama testi (WWT) ile gerçekleştirilir. WWT uygulaması sırasında yapılan hataların değerlendirilmesi, maliyetli sonuçlar doğurabilecek kargo kontaminasyonunun önlenmesi açısından önemlidir. Bu çalışmada, WWT'nin uygulanmasıyla ilişkili riskler bulanık ortamda Bayes tekniği kullanılarak analiz edilmiştir. Bayes ağı, tehlikeleri tespit etmek ve katkıda bulunan alt nedenlerin olasılıklarını hesaplamak için kullanılırken, risk değerlendirmesindeki belirsizliği ölçmek için bulanık mantık kullanılır. Makale, kimyasal tanker taşımacılığının en kritik sorunlarından biri olan kontaminasyon sorununa yönelik WWT'deki risklerin değerlendirilmesi ve önlenmesi konusunda tüm denizcilik paydaşlarına pratik katkılar sunmaktadır.

Keywords

Duvar yıkama testi, Kimyasal tanker, Bulanık bayes ağları, Bulaşma

Ethical Statement

The author declared that He have no conflict of interest.

Supporting Institution

The author received no financial support for this article's research, authorship, and publication

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