siemens - Public Service Commission

Attachment A to Request No. KS12007
Certain bidders have asked the following questions in regards to RFP No. KS12007, so this addendum is
in answer to those questions and available to all bidders. A question and answer format has been used.
Turbine building structural evaluation commentslclarifications:
Question: Sections 1.2.13 and 1.9.15 discuss "Conduct an evaluation of the Turbine Building structure
considering the expected additional loads resulting from installation of new and larger equipment"
and "Perform an evaluation of the Turbine Building structure and supports to identify if any significant
changes are required to accommodate the expected increases in loads resulting from new and larger
equipment such as turbine motors, main generator, etc.". Both statements imply there is an evaluation
for the existing building loads. What calculations cover the existing TB evaluations, and will these be
made available?
Answer: Original calculations are Gilbert Commonwealth structural calculations and will be made
available. Estimate 200 hours to review and revise calculations as necessary.
Question: The statements in sections 1.2.13 and 1.9.15 ask for an evaluation to see if significant
changes are required. Please define the term "significant" changes versus others?
Answer: "Significant changes" in design loads would be those that would not meet current acceptance
criteria and would require modifications to the existing floor or support columns.
Question: There is no mention of what to do when changes are required. When changes are required,
are they included with this scope or handled separately outside of this scope?
Answer: The modifications would be scope addition and would be priced separately as T&M, if required
Question: Section 1.12 discusses the schedule for the Turbine Building evaluation (Item 15) and is
scheduled to be completed 12/13/07. It is noted that a PO will not be submitted to anyone before late
August. Before the TB evaluation can be done, inputs for the weights and footprints of all equipment
must be known. This includes major components such as the turbine and MSRs. When will the detailed
vendor information be available and the locations within the TB be defined? The schedule indicates that
equipment information will not be known until after the deadline for the TB evaluation, which would
invalidate the TB evaluation schedule. It appears the schedule needs to be reworked to define
predecessor activities for all tasks.
Answer: The weights of the replacement components are readily available and will be provided as part of
the Owners deliverables within the schedule.
Electrical commentslclarifications:
Question: Section 1 9 5 asks for the complete replacement of the existing system with the 2 X 100%
new system each with 100% motor/fan and cooling coils. while Section 1 2 1 discusses upgrade cooling
unit to have redundant fadmotor and cooling coils The existing unit can not be upgraded to have
redundant fans Therefore two 100% new units would be required
Is the plant replacing the existing cooling unit with two new 100% redundant units or upgrading the
existing unit with redundant motors to meet the design requirements7
Answer: Is0 phase bus duct coolers should be replaced with 2 X 100% redundant coolers and fans.