Arne Kjolle. Hydropower in Norway. Mechanical equipment
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Condition Control 15.4
Runner chamber
The narrow gap between runner and the runner chamber should be checked if foreign objects may
have passed the gap and made scratches in the chamber.
Guide vane mechanism
For guide vane mechanism with individual vane servomotors on Bulb turbines it should be checked
that the vanes have an identical movement.
Shaft seal box
For Bulb turbines at standstill it should be checked that the water does not flow out of the box along
the shaft into the turbine bearing.
Generally for Bulb turbines
Special attention should be paid to changes in the sound when the unit is in operation.
References
Kværner Brug: COURSE III, Lecture compendium, Oslo 1986
Quality Assurance 16.1
CHAPTER 16
Quality Assurance (QA)
The organisation for building a hydropower plant performs a quantity of specifications, expectations
and goals for the project with respect to economy, time and quality. The requirements for carrying
out the project are that it is equally important that all sub suppliers are capable of delivering their
supply in accordance with demands as those performed by the project organisation.
There are several ways to ensure the requirements above. The most common however, is to apply
and follow an international quality standard. The most applied standard in Europe is EN ISO 9001
which specifies requirements aimed primarily at preventing nonconformity at all stages from design
through servicing.
The requirements may be divided in two parts. The one part is aimed at organisational matters and
the other specifically at the project.
Examples of organisational requirements are:
• Policy, objectives and commitment to quality shall be documented by the management.
• Responsibility, authority and interrelation of all personnel who manage, perform and verify
work affecting quality shall be defined.
• A management representative shall, irrespective of other responsibilities, have defined
authority and responsibility for the Quality System and its maintenance.
• Quality audits shall be carried out to verify whether quality activities comply with planned
arrangements and to determine the effectiveness of the quality system.
The requirements through a project life are shown in the flow-chart defining period, activities and
end results of different QA - activities.
One may say that the picture differs depending on whether You are a customer or a supplier.
However, whatever role an organisation have in a hydropower project, there is always a customer of
Your services. The Operational Organisation will be customer of the Project Organisation as the
consumers will be customers of the Operational Organisation.
Hence, the need for a Quality system in order to avoid nonconformity is equally important to
everybody involved in a
hydropower plant.
Quality Assurance 16.2
QUALITY ASSURANCE ROUTINES
PERIOD
OFFER
ORDER
TAKING OVER
GUARANTEE
PERIOD
DELIVERY
FINALIZATION
ACTIVITY
GUARANTEE INSPECTION
ASSESSMENT OF
PRODUCT QUALITY
COMMISSIONING
ERECTION
PRODUCTION FOLLOW UP
SUB-CONTRACTOR
CONTROL
DESIGN REVIEW
CONTRACT REVIEW
OFFER REVIEW
STARTING UP MEETING
RESULT
WORK DISTRIBUTION
OFFER SCHEDULE
PROJECT
ORGANIZATION
SCHEDULE
DESIGN
VERIFICATION QUALITY
PLAN
VERIFICATION
VERIFICATION
TEST RESULT
COMMISIONING
REPORT
DELIVERY ASSESSMENT
REPORT
Quality Assurance 16.3
References
Kværner Brug: COURSE III, Lecture compendium, Oslo 1986