IEC 60965 pdf download.Nuclear power plants – Control rooms – Supplementary control room for reactor shutdown without access to the main control room
1 Scope
This International Standard establishes requirements for the Supplementary Control Room provided to enable the operating staff of nuclear power plants to shut down the reactor, where previously operating, and maintain the plant in a safe shut-down state in the event that control of the safety functions can no longer be exercised from the Main Control Room, due to unavailability of the Main Control Room or its facilities. The design has to ensure that the Supplementary Control Room is protected against the hazards, including any localised extreme hazards, leading to the unavailability of the Main Control Room. The standard also establishes requirements for the selection of functions, the design and organisation of the human-machine interface, and the procedures which shall be used systematically to verify and validate the functional design of the supplementary control room. It is assumed that supplementary control room provided for shutdown operations from outside the main control room would be unattended during normal plant conditions other than for periodic testing. The requirements reflect the application of human engineering principles as they apply to the human-machine interface during such periodic testing and during abnormal plant conditions. This standard does not cover special emergency response facilities (e.g. a technical support centre) or facilities provided for radioactive waste handling. Detailed equipment design is also outside the scope of the standard. This standard follows the principles of IAEA Specific Safety Requirements SSR-2/1 and IAEA Safety Guide NS-G-1 .3. The purpose of this standard is to provide functional design requirements to be used in the design of the supplementary control room of a nuclear power plant to meet safety requirements. This standard is intended for application to a supplementary control room whose conceptual design is initiated after the publication of this standard. If it is desired to apply it to existing plants or designs.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. For other terms, refer to the general terminology defined in IEC 60964, IEC 61 51 3 and in the IAEA NUSS programme, such as Safety Guide NS-G-1 .3 or the safety glossary. 3.1 control room staff group of plant personnel stationed in the control room, which is responsible for achieving the plant operational goals by controlling plant through the human-machine interface. Typically, the control room staff consists of supervisory operators, and operators who actually monitor plant and plant conditions and manipulate controls, but may also include those staff members and experts who are authorised to be present in the control room, e.g. during long lasting event sequences [SOURCE: IEC 60964:2009, 3.4] 3.2 design extension conditions postulated accident conditions that are not considered for design basis accidents, but that are considered in the design process of the facility in accordance with best estimate methodology, and for which releases of radioactive material are kept within acceptable limits. Design extension conditions include conditions in events without significant fuel degradation and conditions with core melting [SOURCE: IAEA SSR-2/1 :201 2, definitions revised as DS462] 3.3 local control points local control facilities points (or facilities) located outside the control room where local operators perform control activities [SOURCE: IEC 60964:2009, 3.1 7] 3.4 local operators operating staff that perform tasks outside the control room [SOURCE: IEC 60964:2009, 3.1 8] 3.5 operating staff plant personnel working on shift to operate the plant. The operating staff includes the control room staff, maintenance engineers, etc. [SOURCE: IEC 60964:2009, 3.20] 3.6 supplementary control room location from which limited plant control and/or monitoring can be carried out to accomplish the safety functions identified by the safety analysis as required in the event of a loss of ability to perform those functions from the Main Control Room Note 1 to entry: For existing plants, the Supplementary Control Room may be a special control room, but in many cases comprises sets of control panels and displays in switchgear rooms or similar areas. In the latter case, the term ‘supplementary control point’ is used in this standard.
IEC 60965 pdf download
