---
title: "Convention on Supplementary Compensation (CSC)"
description: "The Convention on Supplementary Compensation for Nuclear Damage (CSC) is crucial for establishing a global nuclear liability regime, especially for operators."
url: "https://modeldiplomat.com/learn/glossary/convention-on-supplementary-compensation"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The CSC is an IAEA treaty establishing a global nuclear liability regime that channels compensation to operators and adds a supplementary international fund for transboundary damage.
- How does the CSC channel liability to the operator, and why does this matter for suppliers?
- What is the difference between the CSC and the Vienna and Paris Conventions?
- How large is the compensation available under the CSC?
- When did the CSC enter into force and who are its key parties?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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## Timeline

1. 29 September 1997

   The Convention on Supplementary Compensation for Nuclear Damage (CSC) was adopted at a diplomatic conference convened by the International Atomic Energy Agen…

2. 15 April 2015

   The Convention entered into force on , ninety days after Japan deposited its instrument of acceptance, meeting the threshold of at least five states with a m…

3. 4 February 2016

   India signed the Convention in 2010 and deposited its instrument of ratification on , a step the Ministry of External Affairs framed as completing the archit…

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Example

India deposited its instrument of ratification of the CSC with the IAEA on 4 February 2016, completing a commitment made alongside the 2008 India-US civil nuclear agreement to align its liability regime with global norms.

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