20240422PAC to Staff 5.pdf

R13JTVID
Mxlday,Apri122,20244:07:06PM
IDAHO PUBLIC
UIILITIFSCONNIS'SION
_ ROCKY MOUNTAIN
POWER
A DIVISION OF PACIFICORP
1407 W North Temple, Suite 330
Salt Lake City, Utah 84116
April 22, 2024
Monica Barrios-Sanchez
Commission Secretary
Idaho Public Utilities Commission
11331 W. Chinden Blvd.
Bldg. 8, Ste. 201-A
Boise, ID 83714
monica.barriossanchez(ir,puc.Idaho.gov
S ecre1M(-,puc.idaho.gov
RE: ID PAC-E-24-05
IPUC Set 1 (1-5)
Please find enclosed Rocky Mountain Power's Response to IPUC 1st Set Data Request 5. The
remaining responses will be provided under separate cover. The Confidential Attachment IPUC
5 is provided via BOX. Confidential information is provided subject to protection under IDAPA
31.01.01.067 and 31.01.01.233, the Idaho Public Utilities Commission's Rules of Procedure No.
67—Information Exempt from Public Review.
If you have any questions, please feel free to call me at [phone].
Sincerely,
/s/
Mark Alder
Manager, Regulation
Enclosures

PAC-E-24-05 /Rocky Mountain Power
April 22, 2024
IPUC Data Request 5
IPUC Data Request 5
Please provide the 2023 outage data for each resource type(Thermal, Wind,
Hydro) in sortable spreadsheets. Please explain the differences between the three
outage types (Forced, Maintenance, Planned).
Response to IPUC Data Request 5
Please refer to the Company's response to IPUC Audit Data Request 6,
specifically Confidential Attachment IPUC Audit 6, which provides forced and
maintenance outage information, longer than 72 hours, for PacifiCorp's owned
thermal generation resources during calendar year 2023. Please refer to
Confidential Attachment IPUC 5 which provides the Company's full outage log
for the Company's owned thermal generation resources during calendar year
2023.
Please refer to Confidential Attachment IPUC 5 which provides the Company's
outage logs for the Company's owned hydroelectric and owned wind resources
for calendar year 2023.
Definitions of outage types are publicly available and are in accordance with the
data reporting instructions established by the North American Electric Reliability
Corporation (NERC) Generating Availability Data System (GADS). Please refer
to the following website links for NERC GADS data reporting instructions which
provides full definitions of outage types:
https://www.nerc.com/pa/RAPA/gads/Pages/GeneratingAvailabilityDataSystem-
(GADS).aspx
https://www.nerc.com/pa/RAPA/gads/Pages/Data%2OReporting%20Instructions.
aspx
GADS Wind Turbine Generation Data Reporting Instructions (nerc.com)
The provided outage logs for the Company's hydroelectric and thermal operations
generally include categories for forced, planned and/or maintenance outage
types. A summary is provided below:
• Forced—(when a unit trips off-line or is required to be taken off-line
within a few days)
— U1 -This is an outage that requires immediate removal of a unit from
service, another outage state, or a reserve shutdown state.

PAC-E-24-05 /Rocky Mountain Power
April 22, 2024
IPUC Data Request 5
— U2 -This is an outage that does not require immediate removal of a unit
from the in-service state, instead requiring removal within six hours.
— U3 -This is an outage that can be postponed beyond six hours but requires
that a unit be removed from the in-service state before the end of the next
weekend (Sunday at 2400 or before Sunday turns into Monday).
— SF - Startup Failure. This is an outage that results when a unit is unable to
synchronize within a specified startup time following an outage or reserve
shutdown.
• Planned—(this designation is used for scheduled overhauls and
inspections)
— PO - An outage that is scheduled well in advance and is of a
predetermined duration, can last for several weeks, and occurs only once
or twice a year.
— PE -GADS defines a planned outage extension as an extension of a PO
beyond its estimated completion date.
• Maintenance—(periodic maintenance or repairs that did not result in a
forced outage)
— MO - An outage that can be deferred beyond the end of the next weekend
(defined as Sunday at 2400 hours or as Sunday turns into Monday), but
requires that the unit be removed from service, another outage state, or
Reserve Shutdown state before the next PO.
The provided outage log for the Company's wind operations generally includes
categories for planned and/or forced outage types. A summary is provided
below:
• Planned -Any outage that required a circuit of wind turbines to be out of
service for a predetermined amount of time. Such outages are scheduled in
advance and allow for the safe shutdown of the turbines before the circuit is
disconnected.
• Forced outage -Any outage that affects a circuit of turbines but was not
scheduled and does not have a predetermined duration.
Confidential information is provided subject to protection under IDAPA
31.01.01.067 and 31.01.01.233, the Idaho Public Utilities Commission's Rules of
Procedure No. 67—Information Exempt from Public Review, and further subject
to the non-disclosure agreement(NDA) executed in this proceeding.

PAC-E-24-05 /Rocky Mountain Power
April 22, 2024
IPUC Data Request 5
Recordholder: Gavin Mangelson/Tom Hickey/Devin Hutchinson
Sponsor: To Be Determined