NOTICE DATE:  September 26, 2012

NOTICE TYPE:  W-C083112-02 Operations

SHORT DESCRIPTION: Initial determination of RMR status for Luminant Generation Company LLC, Monticello Units 1 & 2


DAY AFFECTED:  September 26, 2012

LONG DESCRIPTION:  On August 31, 2012, ERCOT received Notification of Suspension of Operations (NSO) for the following Generation Resources with a proposed effective date of December 1, 2012 for a period not less than six months and not greater than 7 months:

*       Luminant Generation Company LLC  - MNSES_UNIT1 and MNSES_UNIT2

Pursuant to requirements under ERCOT Protocol (3), ERCOT is issuing an initial determination that these units may be needed for Reliability Must Run service.

ERCOT intends to continue to review the impacts of this NSO on transmission system reliability, in coordination with the impacted transmission owners, in an effort to develop alternative solutions.  Following that continued review, and taking into account alternative solutions that may be developed, ERCOT will issue its final determination of whether the Generation Resource is required to provide voltage support, stability or management of localized transmission constraints under first contingency criteria by October 30. 2012.

CONTACT:  If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask]<mailto:[log in to unmask]>.

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