Maintenance of Process Instrumentation in Nuclear Power Plants


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A showcase of the highly reliable technical skill necessary to support the electrical instrumentation and maintenance needs of modern power plants. Photovoltaic generation facility construction Kurihalant is active in the creation of photovoltaic generation facilities, which are being employed globally in an earnest effort to move society towards the creation of clean, green energy.

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Thermal power plant construction When creating next-generation power plants, Kurihalant employs new, highly heat-efficient technologies that take the environment into account. Nuclear power plant construction From the pre-construction stage onwards, Kurihalant participates in many aspects of nuclear power plant construction, including electrical work and the installation of instrumentation and facilities both in and outside the plant.

Plant maintenance Once construction of a power plant is complete, Kurihalant deploys the very people who were involved in its construction and tasks them with conducting on-site maintenance derived from their deep knowledge of the construction process.


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Ohi Nuclear Power Station. The Kansai Electric Co. Himeji No. Japan Nuclear Fuel Limited. Uranium Enrichment Plant. Tohoku Electric Power Co. Onagawa Nuclear Power Plant. Tokyo Electric Power Co.

They also feature enhanced human-machine interfaces such as more versatile displays with integrated process information ACRS, These features, along with the other features of advanced plants, are intended to make the advanced plants simpler and safer. Certification of these designs has been sought under the provisions of 10 CFR Licensing of any systems for use in a nuclear power plant is governed by formal, documented criteria.

The GDC were written early in the development of commercial nuclear power, before digital equipment, advanced materials, or modern fire-fighting systems such as halon were used in nuclear plants. The GDC requirements are nevertheless very important in guiding the design of digital systems in nuclear power plants. Examples of requirements from the GDC of particular interest for this report are contained in Appendix E.

Instrumentation & control systems

In order to make the requirements more specific and useful on a day-to-day basis, the USNRC provides extensive supplemental guidance in a variety of forms see Table For example, numerous regulatory guides have been issued that describe interpretations of the regulations acceptable to the USNRC staff. These "reg guides" are not mandatory, but if they are followed by the licensing applicant they provide a basis upon which the applicant's proposal will be accepted. Other regulatory guidance is provided by endorsement of a wide variety of industry standards and through the promulgation of branch technical positions, which are technical positions adopted by various branches offices of the USNRC regulatory staff.

The Standard Review Plan provides detailed guidance to the USNRC reviewers as to what is needed from the licensee to assess the adequacy of a proposed design; it also defines a satisfactory method of complying with the licensing requirements.

Assessing Nuclear Safety Related Control and Instrumentation Systems

The guidance provided by the regulatory guides, branch technical positions, and industry standards is still more detailed. A major revision of the Standard. The nuclear industry and the U. Nuclear Regulatory Commission USNRC have been working for several years on the development of an adequate process to guide the replacement of aging analog monitoring and control instrumentation in nuclear power plants with modern digital instrumentation without introducing off-setting safety problems.

This book identifies criteria for the USNRC's review and acceptance of digital applications in nuclear power plants. It focuses on eight areas: software quality assurance, common-mode software failure potential, systems aspects of digital instrumentation and control technology, human factors and human-machine interfaces, safety and reliability assessment methods, dedication of commercial off-the-shelf hardware and software, the case-by-case licensing process, and the adequacy of technical infrastructure. Based on feedback from you, our users, we've made some improvements that make it easier than ever to read thousands of publications on our website.

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Looking for other ways to read this? No thanks. Plant Protection and Mitigation Systems. Page 15 Share Cite. Operating Conditions for Instrumentation and Control Systems. Page 16 Share Cite. Applications to Nuclear Plants.

Page 17 Share Cite. Page 14 Share Cite.


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  • Login or Register to save! Stay Connected! As part of this solution, ABS Group adapted a client supplied methodology to perform the in-depth modern standards review of complex, nuclear safety related control systems. For each location, ABS Group engineers examined a wide range of design, commissioning and testing documentation to gain an understanding of the data processing and control systems which provide information to operators, raise alarms and perform automatic reactor control.

    Topic areas included system architecture, technology, development processes and design substantiation. Our engineers worked closely with the client to clarify technical points and to verify that the review information was accurate. The design reviews identified several potential shortfalls for which mitigation and additional recommendations were presented, including design documentation not providing sufficient substantiation of reliability to satisfy modern standards and a risk that self-diagnostics might be inadequate.

    For the first potential shortfall, we recommended a review to reduce reliability claims, if possible, combined with additional documentation and analysis to fully support the remaining claims. For the second potential shortfall, we recommended a review of diagnostic capability to determine if the systems were consistent with modern standards requirements.

    Maintenance of Process Instrumentation in Nuclear Power Plants Maintenance of Process Instrumentation in Nuclear Power Plants
    Maintenance of Process Instrumentation in Nuclear Power Plants Maintenance of Process Instrumentation in Nuclear Power Plants
    Maintenance of Process Instrumentation in Nuclear Power Plants Maintenance of Process Instrumentation in Nuclear Power Plants
    Maintenance of Process Instrumentation in Nuclear Power Plants Maintenance of Process Instrumentation in Nuclear Power Plants
    Maintenance of Process Instrumentation in Nuclear Power Plants Maintenance of Process Instrumentation in Nuclear Power Plants

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