Přístroje jaderné techniky

Oblast zaměření: Přístroje jaderné techniky
Komise : IEC/SC 45A (Instrumentation and control of nuclear facilities)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 27.08.2019
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This International Standard describes methods for establishing seismic qualification procedures that will yield quantitative data to demonstrate that the equipment can meet its performance requirements. This standard is applicable to electrical, mechanical, instrumentation and control equipment/components that are used in nuclear facilities. This standard provides methods and documentation requirements for seismic qualification of equipment to verify the equipment’s ability to perform its specified performance requirements during and/or after specified seismic demands. This standard does not specify seismic demand or performance requirements. Other aspects, relating to quality assurance, selection of equipment, and design and modification of systems, are not part of this standard. As seismic qualification is only a part of equipment qualification, this standard shall be used in conjunction with IEC/IEEE 60780-323.

The seismic qualification shall demonstrate equipment’s ability to perform its safety function(s) during and/or after the time it is subjected to the forces resulting from at least one safe shutdown earthquake (SSE/S2). This ability shall be demonstrated by taking into account, prior to the SSE/S2, the ageing of equipment and the postulated occurrences of a given number of earthquakes of lower intensity operating basis earthquake (OBE/S1). Ageing phenomena to be considered, if specified in the design specification, are those which could increase the vulnerability of equipment to vibrations caused by an SSE/S2.

Oblast zaměření: Přístroje jaderné techniky
Komise : IEC/SC 45B (Radiation protection instrumentation)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 25.09.2019
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This document defines the performance requirements of installed monitors used for the detection and identification of gamma emitters and the detection of neutron radiation emitters.  These monitors are commonly known as spectrometric radiation portal monitors or SRPMs.  They are used to monitor vehicles, cargo containers, people, or packages and are typically used at national and international border crossings and ports of entry.  SRPMs may be used at any location where there is a need for this type of monitoring.

This document establishes the general, radiological, climatic, mechanical, electric and electromagnetic and documentation requirements and associated test methods.  A summary of the performance requirements is provided in Table 11.  An informative listing of environmental requirements from IEC 62706 is provided in Table 12.

This document does not apply to the performance of non-spectroscopic portal monitors covered in IEC 62244.

Oblast zaměření: Přístroje jaderné techniky
Komise : IEC/SC 45A (Instrumentation and control of nuclear facilities)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 1.10.2019
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This International Standard:

provides requirements and recommendations (see Note) for the overall Electrical Power System. In particular, it covers interruptible and uninterruptible Electrical Power Systems including the systems supplying the I&C systems;

is fully consistent and coherent with IEC 61513. Like IEC 61513, this standard also highlights the need for complete and precise requirements, derived from the plant safety goals. Those requirements are prerequisites for generating the comprehensive requirements for the overall I&C and Electrical Power System architecture, and for the electrical power supply sub-systems;

has to be considered in conjunction with and at the same level as IEC 61513. These two standards provide a complete framework establishing general requirements for instrumentation, control, and Electrical Power Systems for nuclear power plants.

Note: In the following, the word “requirement” is used as a comprehensive term for both requirements and recommendations. The distinction appears at the level of the specific provisions where requirements are expressed by “shall” and recommendations by “should.”

This International Standard establishes:

the high level specification and requirement to implement a suitable Electrical Power System in a NPP that supports reactor safety systems. It also enables electrical energy production providing the transmission grid with active, reactive power and electro-mechanical inertia;

the relationships between:

the plant safety requirements and the architecture of the overall Electrical Power System and its sub-systems (see Figure 1) including:

the contribution to the plant Defence in Depth;

the independency and redundancy provisions;

the electrical requirements and the architecture of the Electrical Power System and its sub-systems;

the functional requirements and the architecture of the Electrical Power System and its sub-systems;

the requirements associated with the maintenance strategy and the architecture of the Electrical Power System and its sub-systems;

the design of Electrical power sub-systems (e.g. interruptible and uninterruptible);

the requirements to supporting systems of Electrical Power System (HVAC, I&C, etc.);

the Electrical Power System life-cycle framework.

The standard does not cover the specification of:

I&C systems;

the transmission lines connecting to outdoor switchyards;

electrical equipment requirements already defined in the industrial IEC standards;

electrical power for security systems (e.g., fences, surveillance systems, entrance control);

lighting and socket facility.