Incoming Goods, Hazardous Materials and Aging of Plant Chemicals

The objective of this Report is to provide a comprehensive understanding of controlling the quality of incoming goods in Nuclear Power Plants. The Report will help utilities with checking that their Quality Assurance system is appropriate or modifying it. The Report will also be useful for manufacturers at properly implementing manufacturing, protection, shipping, labelling, etc for avoiding degradation that may be discovered at the very beginning of plant operation. Finally, regulators will have a complete view of the possible risks of degradation and how to verify that the Quality Assurance programs are implemented.

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Operational Issues and Practices in PWRs

Operational Issues and Practices are important issues for plant personnel. These issues may require optimization or an exchange of knowledge to improve plant operation in a safe, economical, environmentally sustainable way. This report combines the following topics of potentially important consequences:

• Total Organic Carbon (TOC) in primary and secondary system water
• Best practices for corrosion products removal in reactor coolant systems (RCS) of VVERs and the use of mechanical filters or macroporous resins
• Best practices for the use of Ion Exchange Resins for RCS, SG blowdown, and the spent fuel pool
• Best practices to mitigate condenser leakages and recommendations for Operation procedures in case of large impurities ingress
• The Use of Dispersant to Mitigate Steam Generator Corrosion Product Deposition In addition to the help for utilities, this report may be of interest for manufacturers and regulators in understanding some plant issues.

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PWR and VVER Secondary System Water Chemistry

Adequate secondary side water chemistry is crucial for safe and economical PWR and VVER plant operation. A good practised water chemistry control avoids degradation problems of the key components, sucj as steam generators (SG), carbon steeel components and turbine. The PWR and VVER Secondary System Water Chemistry Report gives a complete overview of the various rationale approaches to optimize the water chemistry according to the design and materials as well as the specific situation of each Nuclear Power Plant.

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PWR/VVER Primary Side Coolant Chemistry, Volume II – Water Chemistry Tool to Mitigate the Concerns

(LCC8 STR)
This report is the second volume out of two focusing on PWR/VVER chemistry. Volume II covers the following topics: Chronology of Coolant Chemistry, Current Coolant Chemistry Programs, Coolant Chemistry Guidelines & Practices, Purification and Filtration of the Coolant Monitoring Concept.

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PWR/VVER Primary Side Coolant Chemistry, Volume I – Technical Basis and Recent Discussions

(LCC7 STR)
This report is the first volume out of two focusing on PWR/VVER chemistry. This document is intended to provide a detailed description of the PWR/VVER Primary Side Coolant Chemistry. Furthermore, it should provide a strong support to the utilities for establishing a responsive plant specific chemistry program. It may also help the Manufacturers and Regulators at having a detailed approach of primary water chemistry and corresponding issues.

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Decontamination and Steam Generator Chemical Cleaning

(LCC5 STR)
The objective of this Report is to help the reader to gain a basic understanding of the mechanisms involved in the Decontamination and the Steam Generator Chemical Cleaning Processes. The processes described do not only deal with the basic description but also with application considerations. A second approach to Decontamination is a chronology of the plant applications which range from components to subsystem and full system Decontamination.

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Radiochemistry in Nuclear Power Reactors (Light Water Reactors)

VOLUME I
The objective of this Report is to provide a comprehensive understanding of radiochemistry in Nuclear Power Plants which has a large impact on dose rates, operational exposures, maintenance activities, shutdown process, safety issues, environmental constraints and control of proper plant operation.

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Key Emerging Issues and Recent Progress Related to Plant Chemistry/Corrosion in BWR Reactors

(LCC10 AR)
This Report furnished in the LCC10 Programme cover the key information presented at the Nuclear Power Chemistry Conference, in October 2014. The Report not only summarise but also analyse the results to assess in which specific situation the results are applicable.

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Effects of Coolant Chemistry on Fuel Performance

(LCC9 STR)
The intent of this Report is to provide a state-of-the-art knowledge of the mechanisms of the various forms of Zr-alloy corrosion and hydrogen pickup (HPU) and how water chemistry impacts fuel performance, including corrosion and HPU. This knowledge will help implement actions to reduce Zr alloy corrosion and hydrogen pickup.

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LCC9 AR Operational Issues, Practice and Remedies

Operational Issues, Practices and Remedies are important issues for plant personnel and designers. This report combines the following subjects of limited extent but potentially important consequences:

• Degradation of the primary coolant barrier together with mechanical remedies.
• The potential benefits of Enriched Boric Acid (EBA).
• Primary coolant (Co-58, colloids) inventory.
• Degradation of concrete structures in NPPs.
• Colloids, Zeta Potential and Activity Transport.
• Electrochemical Corrosion Potential (ECP) measurements.
• Key points, ”lessons learned” and ”best practices” of several recent conferences.

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