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E DIN IEC 61250 VDE 0491-3-13:2026-04

Nuclear power plants

Instrumentation and control systems important to safety – Detection of leakage in coolant systems

(IEC 45A/1633/CDV:2025); Text in German and English
Class/Status: Draft, valid
Released: 2026 -04   Published: 2026-03 -06
VDE Art. No.: 1400654
End of objection deadline: 2026-05-06

Note: You can pre-order this document (delivery subject to availability). Valid from 2026-04-01.

The document defines the requirements for instrumentation needed to detect leakage from reactor coolant systems of light water nuclear reactors. Methods of leak detection and characteristics of different methods of detection are described, and the differentiating between allowable and abnormal leakages are given.