View source for U-602791, Documents Util Plans to Conduct Mid Cycle Outage.Primary Purpose of Outage Will Be to Improve Matl Condition of Plant.Schedule Encl

{{Adams
| number = ML20141H086
| issue date = 07/16/1997
| title = Documents Util Plans to Conduct Mid Cycle Outage.Primary Purpose of Outage Will Be to Improve Matl Condition of Plant.Schedule Encl
| author name = Romberg W
| author affiliation = ILLINOIS POWER CO.
| addressee name = Beach A
| addressee affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION III)
| docket = 05000461
| license number = 
| contact person = 
| document report number = U-602791, NUDOCS 9707210170
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE
| page count = 3
}}

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* libnois Power Company Chnton Power Station P O Box 678 Chnton, IL 61727 Tel 217 935-0220 Fax 217 935-4632 Ass stan V         dent - Nuclear An lihoova Company
                                                            .                                       U-602791 July 16, 1997 Docket .No. 50-461 Mr. A. Bill Beach Regional Administrator, Region III U. S. Muclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 l
I

==Subject:==
Mid Cycle Outage Planned At Clinton Power Station I

==Dear Mr. Beach:==

This letter is written to document Illinois Power's plans to conduct a mid cycle outage. The primary purpose of this outage will be to improve the materiel condition of the plant. We currently have the outage scheduled to begin in April 1998 and is planned to have a duration of approximately 30 days.
A mid-cycle outage gives Illinois Power a significant opportunity to accomplish tasks that will provide additional assurance of safe, reliable operation ofimportant systems. Major items included in the scope of the outage will include:
e    Feedwater check valve testing e    Selected Technical Specification Surveillance testing
                             . Thermo-Lag rework / removal e    Required divisional outages                                                              /
e    Contingency items as indicated by plc.at performance                                         /
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Tl'is schedule and scope is still in the preliminary planning stages and specific dates, duration's and items may change as we approach the Spring of 1998. We remain commit'ed to conducting an outage to further improve our plant's performance. Ifyou hve any questions on this subject, please contact me directly.
Sincerely yours, fNW '
Wayne D. Romberg Assistant Vice President MDS/Irh Attachment cc:     J. L. Caldwell, USNRC, Region III G. C. Wright, USNRC, Region III G. E. Grant, USNRC, Region III NRC Resident Office, V-690 Document Control Desk, USNRC Dave Zemel, T-31Z i

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I Reauirement "One of these circuits shall be designed to be available within a few seconds following a loss-of-coolant accident to assure that core cooling, containment integrity, and other vital safety functions are maintained."
                                                     - CPS Compliance The ERAT (138kV system) and RAT (345kV system) are each capable of being continuously available to supply all safety-related loads following a LOCA.
)                                                      Recent grid voltage history demonstrates that the 138kV system-voltage is more constant than that of the 345kV system.
J Reauirement Each of these circuits shall be designed to be available in sufficient time following a loss of all onsite attemating current power supplies and the other offsite electric power circuit, to assure that specified acceptable fuel design limits and design conditions of the reactor coolant pressure boundary are not exceeded.
                                                     - CPS Compliance Both the ERAT (138kV system) and RAT (345kV system) are immediate access circuits. However, if the voltage of either source is too low (such that the source may not be available following a plant     4 trip), the source effectively becomes a delayed access circuit that can be recovered in a reasonably short period of time (i.e., well within the coping time established for a station blackout at CPS).
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