What is BS IEC 62765‑2- Management of the ageing of temperature sensors in NPPs about?
BS IEC 62765 is an international standard that discusses instrument and control (I&C) components important to the safety of nuclear powers plants (NPPs). The main objective of BS IEC 62765 is to maintain integrity of safety systems containing devices and equipment used in NPPs.
BS IEC 62765‑2 is the second part of the series that specifies minimum requirements and applicable practices for correcting and preventing any potential impacts on NPP safety due to the ageing of temperature sensors, such as NPP resistance temperature detectors (RTDs) and thermocouples (TCs).
BS IEC 62765‑2 provides strategies, technical requirements, and recommended practices for managing the ageing of temperature sensors critical to plant safety in NPPs to ensure that ageing can be identified and that appropriate corrective actions are taken as needed to demonstrate that the plant's safety will not be impaired.
Who is BS IEC 62765‑2- Management of the ageing of temperature sensors in NPPs for?
BS IEC 62765‑2 on nuclear powers plants is relevant to:
- Nuclear power stations
- Electric power plants
- Atomic research organizations
- Nuclear power plants electrical systems and equipment manufacturers
- Operators of NPP, system evaluators and licensors
- Regulatory authorities
Why should you use BS IEC 62765‑2-Management of the ageing of temperature sensors in NPPs?
With the majority of nuclear power plants being over 30 years old, the management of ageing of temperature sensors is currently an important topic, especially for those plants that have extended their operating licenses or are considering this option.
BS IEC 62765‑2 aids in the calibration of measuring and test equipment for temperature sensors used in NPPs by providing minimum requirements and procedures for correcting and preventing any potential hazards.
There are no functional criteria for safety systems in BS IEC 62765‑2. However, it facilitates in performance assessments and enhances sensor reliability by reducing the ageing of temperature sensor systems. Following are the aspects in BS IEC 62765‑2 for which particular recommendations and limitations are intended to be used:
- Criteria for the evaluation of ageing of temperature sensors in NPPs
- Steps to be followed to establish the temperature sensor testing requirements for an
- Ageing management program for NPP instrumentation systems
- Relationships between on-going qualification analysis and ageing management program with regard to temperature sensors
BS IEC 62765‑2 sets minimal requirements aimed at ensuring that any potential implications on NPP safety owing to the ageing of temperature sensors are identified and that appropriate actions are taken to demonstrate that the plant's safety is not compromised. You can thus maximize plant efficiency and safety as well as increase service-life of existing NPPs.
