Infoteenus
27 ELEKTRI- JA SOOJUSENERGEETIKA
Uued standardid
ISO 11483:2026
Nuclear fuel technology — Preparation of plutonium sources and determination of 238Pu/239Pu isotope ratio by alpha spectrometry
Käsitlusala: This document describes the procedures to prepare plutonium sources and to measure the activity ratio of 238Pu to (239Pu + 240Pu) by alpha spectrometry. The alpha spectrometry method is used for the determination of isotopic abundance of 238Pu in combination with isotope-amount ratios determined by mass spectrometry after a preliminary separation of plutonium from uranium and fission products which eliminates the possible isobaric interferences of 238U in the latter method. It is applied to the analysis of purified solutions of plutonium in 2 mol/l to 4 mol/l of nitric acid containing 50 µg to 200 µg of plutonium per millilitre, as can result from the chemical treatment and purification preceding plutonium isotopic analysis by mass spectrometry.
This document is applied to plutonium solutions free from 241Am and those containing less than 10 % of other non-volatile impurities relative to the plutonium content. Otherwise purification is carried out in accordance with ISO 8299.
The methods provided in this document are intended for use in conjunction or in parallel with mass spectrometry for the isotopic analysis of plutonium in spent-fuel solutions or nuclear-grade plutonium products.
This document is applied to plutonium solutions free from 241Am and those containing less than 10 % of other non-volatile impurities relative to the plutonium content. Otherwise purification is carried out in accordance with ISO 8299.
The methods provided in this document are intended for use in conjunction or in parallel with mass spectrometry for the isotopic analysis of plutonium in spent-fuel solutions or nuclear-grade plutonium products.
Alusdokumendid:
Asendab: ISO 11483:2005
IEC 62817:2014+AMD1:2017+AMD2:2026 CSV
Photovoltaic systems - Design qualification of solar trackers
Käsitlusala: IEC 62817:2014+AMD1:2017+AMD2:2026 CSV is a design qualification standard applicable to solar trackers for photovoltaic systems, but may be used for trackers in other solar applications. The standard defines test procedures for both key components and for the complete tracker system. In some cases, test procedures describe methods to measure and/or calculate parameters to be reported in the defined tracker specification sheet. In other cases, the test procedure results in a pass/fail criterion. This standard ensures the user of the said tracker that parameters reported in the specification sheet were measured by consistent and accepted industry procedures. The tests with pass/fail criteria are engineered with the purpose of separating tracker designs that are likely to have early failures from those designs that are sound and suitable for use as specified by the manufacturer.
Alusdokumendid:
IEC PAS 61400-60:2026
Wind energy generation systems - Part 60: Validation of computational models
Käsitlusala: IEC PAS 61400-60:2026 will be applied to existing models already in use within the wind energy sector, as well as to future models (and updates of models) that will be used within the wind energy sector. As such, this document does not set specific requirements to model accuracy and precision but aims to transparently establish the performance of models in terms of accuracy and precision, both for the intended use as covered by measurements as well as the predictive capability of the model.
This document (and all documents under IEC PAS 61400-60 (all parts) aims at model validation but not model development. Specifically, this document further defines the model validation requirements in the following standards and operational documents:
- IEC 61400-1:2019,
- IEC 61400-5:2020,
- IEC 61400-27-2:2020,
- OD-501:2018 [2],
- OD-501:2022 [3],
- IECRE Clarification sheet CSH022 Ed 2.0
This document (and all documents under IEC PAS 61400-60 (all parts) aims at model validation but not model development. Specifically, this document further defines the model validation requirements in the following standards and operational documents:
- IEC 61400-1:2019,
- IEC 61400-5:2020,
- IEC 61400-27-2:2020,
- OD-501:2018 [2],
- OD-501:2022 [3],
- IECRE Clarification sheet CSH022 Ed 2.0
Alusdokumendid:
IEC 62862-3-5:2026
Solar thermal electric plants - Part 3-5: Laboratory reflectance measurement of solar reflectors
Käsitlusala: IEC 62862-3-5:2026 specifies laboratory methods to measure reflectance of all types of reflectors for use in concentrating solar thermal (CST) plants.
Alusdokumendid:
IEC 62817:2014/AMD2:2026
Amendment 2 - Photovoltaic systems - Design qualification of solar trackers
Käsitlusala: Amendment to IEC 62817:2014
Alusdokumendid:
Asendatud standardid
ISO 11483:2005
Nuclear fuel technology -- Preparation of plutonium sources and determination of 238Pu/239Pu isotope ratio by alpha spectrometry
Käsitlusala: ISO 11483: 2005 describes three simple and fast procedures to prepare plutonium sources and a procedure to measure the activity ratio of 238Pu to (239Pu + 240Pu) by alpha spectrometry. The alpha spectrometry method is used for the determination of isotopic abundance of 238Pu in combination with mass spectrometry and eliminates the possible interferences of 238U in the latter method. It applies to the analysis of purified solutions of plutonium in 2 mol/l to 4 mol/l nitric acid containing 50 micrograms to 200 micrograms of plutonium per millilitre, as may result from the chemical treatment and purification preceding plutonium isotopic analysis by mass spectrometry.
Alusdokumendid:
Asendatud: ISO 11483:2026
Kavandid
EN IEC 60335-2-104:2025/prAB:2026
Household and similar electrical appliances - Safety - Part 2-104: Particular requirements for appliances to recover and/or recycle refrigerant from air conditioning and refrigeration equipment
Käsitlusala: Amendment to EN IEC 60335-2-104:2025
Alusdokumendid: EN IEC 60335-2-104:2025/prAB:2026