What is BS IEC/IEEE 62582-4 - Oxidation induction techniques for NPPs about?
Oxidation induction methods are based on the detection of the oxidation exotherm that occurs when a sample is heated in the presence of oxygen.
IEC/IEEE 62582 is an international standard series that discusses instrumentation and control important to safety of nuclear power plants.
BS IEC/IEEE 62582-4 is the fourth part of the IEC/IEEE 62582 series that specifies methods for condition monitoring of organic and polymeric materials in instrumentation and control systems using oxidation induction techniques in the detail necessary to produce accurate and reproducible measurements. BS IEC/IEEE 62582-4 the requirements for sample preparation, the measurement system and conditions, and the reporting of the measurement results.
The different parts of IEC/IEEE 62582 are measurement standards, primarily for use in the management of ageing in initial qualification and after installation. Part 1 of BS IEC/IEEE 62582 includes requirements for the application of the other parts of BS IEC/IEEE 62582 and some elements which are common to all methods. Information on the role of condition monitoring in the qualification of equipment important to safety is found in IEEE Std 323.
Who is BS IEC/IEEE 62582-4 - Oxidation induction techniques for NPPs for?
BS IEC/IEEE 62582-4 on oxidation induction techniques for NPPs is useful for:
- Nuclear power plants (NPP)
- Atomic energy agencies
- Atomic research organizations
- Nuclear power plants electrical systems and equipment manufacturers
- Operators of NPP, systems evaluators and licensors
- Nuclear safety authorities
- Regulatory authorities
Why should you use BS IEC/IEEE 62582-4 - Oxidation induction techniques for NPPs?
BS IEC/IEEE 62582-4 specifically focuses on oxidation induction methods for condition monitoring for the management of ageing of electrical equipment installed in nuclear power plants. The methods are primarily suited to samples taken from materials that are polyolefin-based, but they can also be used for some materials based on ethylene-propylene polymers and for some ethylene vinyl acetate materials.
BS IEC/IEEE 62582-4 contains detailed descriptions of condition monitoring based on oxidation induction measurements.
There are two oxidation induction methods available, based on the time required to reach the onset of oxidation at a constant temperature (oxidation induction time – OIT) or based on the temperature at the onset of oxidation during a constant temperature ramp rate (oxidation induction temperature – OITP). The two methods are complementary, in that OITP is often effective in those materials where OIT is difficult to determine. OIT and OITP decrease with increasing degradation. The methods are related to the amount of antioxidants present in the material. As degradation proceeds, these antioxidants are depleted.
Thus, BS IEC/IEEE 62582-4-compliant test methods play a significant role when it comes to quality control, ensuring that materials of components that are a part of I&C systems, do not in any manner compromise the safety and performance of nuclear power plants.
