Environmental Engineering Reference
In-Depth Information
be used by the CVA as a framework providing consistency in evaluating
prescriptive standards and elements within a basis of design and the con-
struction and installation documents.
SUMMARY
In the late 1970s, the development of oil and gas facilities in offshore envi-
ronments began accelerating in areas posing more severe challenges (e.g.,
deeper water, earthquake zones, and unstable seafloor sediments) and in
areas with little or no historical operating experience. Similarly, in the past
20 years, wind energy facilities in Europe have spread from land to off-
shore environments. In both of these situations, regulators have used
third-party review protocols to assist in the oversight of design, fabrica-
tion, and installation of facilities and to provide a higher level of assur-
ance that the interests of the public and the regulations governing these
facilities are being met.
FINDINGS AND RECOMMENDATIONS FOR TASK II
The findings and recommendations for Task II of the statement of task
are given below.
Findings
1. Wind turbine type certification in accordance with IEC 61400 pro-
vides effective oversight and third-party review for
a. Design of the nacelle;
b. Design of the blades if the type certification criteria match the instal-
lation conditions; and
c. Design of the tower provided the foundation stiffness matches the
design assumptions and specifications of the tower, blades, and
nacelle.
2. Type certification does not cover fabrication, transportation, or instal-
lation activities.
3. Type certification of blades addresses only design conditions and
requires testing of only one blade. There are no fabrication quality
assurance/quality control requirements for production.
Search WWH ::
Custom Search