20170926PAC to Staff 48-51.pdf

ROCKY MOUNTAINPOWER
A DIVISION OF PACIFICORP 1407 W North Temple,Suite 330
Salt Lake City,Utah 84116
September 26,2017
Diane Hanian
Idaho Public Utilities Commission
472 W.Washington
Boise,ID 83702-5918
[e-mail] (C)
RE:ID PAC-E-17-07
IPUC 16*Set Data Request (48-51)
Please find enclosed Rocky Mountain Power's Responses to IPUC 211d Set Data Requests 48-51.
Provided on the enclosed CD are Confidential Attachments IPUC 48 and 50.Confidential
information is provided subject to the terms and conditions of the protective agreement in this
proceeding.
If you have any questions,please feel free to call me at [phone].
Sincerely,
J.Ted Weston
Manager,Regulation
Enclosures
C.c.:Ronald L.Williams/PIIC ron@wilianlsbadbury_.co_rn(C)
Jim Duke/PIIC iduke@idahoangen(W)
Kyle Williams/PIIC [e-mail](W)
Val Steiner/PIIC (W)
Brian C.Collins/Brubaker &Associates (C)(W)
James R.Smith/Monsanto [e-mail] (C)(W)
Maurice Brubaker/Monsanto [e-mail](C)(W)
Katie Iverson/Monsanto [e-mail] (C)
Eric Olsen/IIPA [e-mail]_m (C)
AnthonyYankel/IIPA (C)
Randall C.Budge/Monsanto [e-mail](C)
Thomas J.Budge/Monsanto [e-mail] (C)(W)
PAC-E-17-07 /Rocky Mountain Power
September 26,2017
IPUC 2nd Set Data Request 48
IPUC Data Request 48
Please compare in detail the Naughton plant's contribution to PacifiCorp's
system,with and without the Company's proposed project throughout the defined
remaining life.Further,please provide the followingfor each plant unit from
2017 to the plant end of life:
(1)Total Variable Costs ($)-(i.e.fuel,start-up,CO2,operation and maintenance,
(2)Total Fixed Costs ($)-(fixed operation and maintenance,depreciation,...)
(3)Net Generation (MWh)
(4)Capacity Factor (%)
(5)Cost per mega-watt hour ($/MWh)based on Total Variable Cost
(6)Cost per mega-watt hour ($/MWh)based on Total Variable and Fixed Cost
Response to IPUC Data Request 48
Please refer to Confidential Attachment IPUC 48,which provides the Naughton
plant's contribution to PacifiCorp's system.
(1)Please refer to the confidential work papers supporting the Direct Testimony
of Company witness,Rick T.Link:
System Optimizermodel (SO model)-The variable costs are "Existing
Station Fuel Costs","Existing Station Variable O&M Costs"and "Existing
Station Emission Costs"in millions of dollars are provided in the confidential
folder "SO Model Summary Reports",then select a study,for example,the
file "SO Portfolio RPCC-RPN-EGI-MM_1706041757".Open tab
"PaR StationData"and sort column b "Resource for the Naughton units"(i.e.
CL Ñaughtonl,CL Naughton2,CL Naughton3).
Planning and Risk (PaR)model-The variable costs are "Fuel Costs
($000)","Start Cost ($000),"VOM Costs ($000)"and "CO2 Costs ($000)"in
thousands of dollars are provided in the confidential folder "PaR Summary
Reports",then select a study,for example the file "PaR Stochastic Summary
PRPCC-RPN-EGI-MM _1706050906".Open tab "PVRRby Station"and
filter column f "Entity for the Naughton units"(i.e.CL Naughtonl,
CL_Naughton2,CL_Naughton3).
PAC-E-17-07 /Rocky Mountain Power
September 26,2017
IPUC 2nd Set Data Request 48
(2)Please refer to the Company's response to subpart (1)above.For the SO
model fixed costs by unit,look for "Existing Station Fixed Costs"which
reports the total fixed costs as the model does not breakdown by item.
The PaR model fixed costs are taken directly from SO model.
(3)Please refer to the Company's response to subpart (1)above.For SO model
net generation,go to tab "Existing Generationby Station"reported in
gigawatt-hours (GWh)annually,and look for Naughton by unit.To convert to
megawatt-hours (MWh)multiplyGWh by 1,000.For PaR model net
generation,look for the "Generation GWh"column.The data is the same as
the Net Output (GWh).
(4)Please refer to the Company's response to subpart (1)above.For SO model
capacity factor,go to tab "Capacity factor"reported annuallyand look for
Naughton by unit.PaR does not report capacity factor.The capacity factor can
be calculated by taking the generation in GWh as referenced in subpart (3)
above,multiplyby 1,000 and divide by the Capacity @peakhr (megawatt
(MW))multipliedby hours per year,8,760 except in leap years.
(5)Please refer to the Company's response to subpart (1)above for variable costs
in dollars millions for the SO model and divide by the referenced net
generationby unit in GWh referenced in subpart (3)above,multiplyby 1,000
to calculate the cost per MWh ($/MWh)for total variable cost.Also refer to
subpart (1)above for variable costs in dollars thousands for PaR,and divide
by the generationby unit in GWh referenced in subpart (3)above,multiplyto
calculate the $/MWh for total variable cost.
(6)Please refer to the Company's response to subpart (1)above for variable costs
plus subpart (2)above Fixed Costs in dollars millions by unit for the SO
model,and divide by subpart (3)generationby unit in GWh,multiplyby
1,000 to calculate the $/MWh for total variable and fixed cost.Also refer to
subpart (1)above for variable costs in dollars thousands for PaR,plus subpart
(2)above Fixed Costs in dollars millions by unit for SO model,but convert to
thousand dollars by multiplyby 1,000,and divide by subpart (3)above PaR
generationby unit in GWh to calculate the $/MWh for total variable and fixed
cost.
Confidential information is provided subject to the terms and conditions of the
protective agreement in this proceeding.
Recordholder:Dan Swan
Sponsor:Rick Link
PAC-E-17-07 /Rocky Mountain Power
September 26,2017
IPUC 2nd Set Data Request 49
IPUC Data Request 49
In the context of Production Request No.49,did the Company evaluate an earlier
closure of the Naughton units based on implementation of this project?If so,
please provide any analysis.If not,does the Company believe this should be
evaluated?Please explain.
Response to IPUC Data Request 49
The Company assumes that the reference in the request to "Request No.49"is
intended to reference IPUC Data Request 48.Based on this assumption,the
Company responds as follows:
The Company has not performed the evaluation of early closure of Naughton
Unit 1 or Naughton Unit 2.Naughton Unit 3 is retired at the end of 20 18 in the
studies.
PacifiCorp analyzed a range of alternative coal-plant retirement scenarios in its
2017 IntegratedResource Plan (IRP).This analysis was used to identify least-
cost coal-retirement assumptions that are maintained in the economic analysis
performed by the Company in this proceeding.
The analysis described in the request is not needed at this time as alternative coal-
unit retirement assumptions for the Naughton units would be independentof the
proposed projects in this proceeding and therefore would be the same in the
simulations performed with or without the proposed new wind and transmission
projects.
Recordholder:Dan Swan
Sponsor:Rick Link
PAC-E-17-07 /Rocky Mountain Power
September 26,2017
IPUC 2nd Set Data Request 50
IPUC Data Request 50
Please compare in detail the Hayden plant's contribution to PacifiCorp's system
with and without the Company's proposed project throughout the defined
remaining life.Further,please specifically provide the followingfor each plant
unit from 2017 to the plant end of life:
1.Total Variable Costs ($)-(i.e.fuel,start-up,CO2,operation and maintenance,
2.Total Fixed Costs ($)-(fixed operation and maintenance,depreciation,...)
3.Net Generation (MWh)
4.Capacity Factor (%)
5.Cost per mega-watt hour ($/MWh)based on Total Variable Cost
6.Cost per mega-watt hour ($/MWh)based on Total Variable and Fixed Cost
Response to IPUC Data Request 50
Please refer to Confidential Attachment IPUC 50,which provides the Hayden
plant's contribution to PacifiCorp's system.
Please refer to the Company's response to IPUC Data Request 48,subparts (1)
through (6),to locate the requested information and follow the same steps.
Replace references to "Naughton"with "Hayden",specifically "CL_Hayden1"
and "CL Hayden2".
Confidential information is provided subject to the terms and conditions of the
protective agreement in this proceeding.
Recordholder:Dan Swan
Sponsor:Rick Link
PAC-E-17-07 /Rocky Mountain Power
September 26,2017
IPUC 2nd Set Data Request 51
IPUC Data Request 51
In the context of Production Request No.51,did the Company evaluate a sale or
early closure of the Hayden units based on implementation of this project?If so,
please provide any analysis.If not,does the Company believe this should be
evaluated?Please explain.
Response to IPUC Data Request 51
The Company assumes that the reference in the request to "Request No.51"is
intended to reference IPUC Data Request 50.Based on this assumption,the
Company responds as follows:
PacifiCorp analyzed a range of alternative coal-plant retirement scenarios in its
2017 Integrated Resource Plan (IRP).This analysis was used to identify least-
cost coal-retirement assumptions that are maintained in the economic analysis
performed by the Company in this proceeding.
The analysis described in the request is not needed at this time as alternative coal-
unit retirement assumptions for Hayden units would be independentof the
proposed projects in this proceeding and therefore would be the same in the
simulations performed with or without the proposed new wind and transmission
projects.
Recordholder:Dan Swan
Sponsor:Rick Link