SODBatch A&B SPM Comments co-chair response final ... - ipcc-wg3

Chapter-
Comment
SPM-
856
SPM-
857
para
Batch
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Comments
IPCC WGIII Fourth Assessment Report, Second Order Draft
14 A 12 14 12 16
(Andy Reisinger, TSU IPCC Synthesis Report)
Change the sentence, "A critical issue is how quickly new coal
plants are going to be equipped with CCS, because retrofitting
power plants with CCS later is generally economically
unattractive.", to "One important issue is to speed up considering
the feasibility of new coal plants to be equipped with CCS, because
retrofitting power plants with CCS later is generally economically
unattractive."
According to the "SPM Carbon Dioxide Capture and Storage",
"Costs vary considerably in both absolute and relative terms from
country to country. Since neither Natural Gas Combined Cycle,
Pulverized Coal nor Integrated Gasification Combined Cycle
systems have yet been built at a full scale with CCS, the costs of
these systems cannot be stated with a high degree of confidence at
this time."(Chapter 14) and "Currently available literature regarding
the matches between large CO2 point sources with suitable
geological storage formations is limited. "(Chapter 12) Such being
the case, uncertainties still remain and a lot of factors including
costs, public response and environmental impacts etc. to be
investigated before concluding that CCS can be applied to each coal
plant in each country.The original expression is policy prescriptive.
14 A 12 14 12 16
(Shigeo Murayama, The Federation of Electric Power Companies)
The description of "…, because retrofitting power plants with CCS
later is generally economically unattractive" is unclear. For
example, the description should be changed to "... with CCS later is
more expensive than the new plants".
(Keigo Akimoto, Research Institute of Innovative Technology for
the Earth (RITE))
Expert Review of Second-Order-Draft
Confidential, Do Not Cite or Quote
Response suggested by cochairs
Action
for
chapter
Considerations
by the writing
team
See A-855 See A-855
(4)
DISCUSS; reformulate to focus
on the issue of “capture ready”
on which AR4 has new
literature compared to SRCCS;
message could maybe say:
“capture ready is as expensive
as retrofitting (which is more
costly that integrated design)”
4 Rejected. We
don’t have
enough
information to
state that adding
CCS later is
costlier than a
new plant.
(4)
SPM- 14 A 12 14 12 16 The question of retrofitting CCS economics is debateable and See A-857 Noted and
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