ML20033C118
| ML20033C118 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 11/25/1981 |
| From: | Parker W DUKE POWER CO. |
| To: | Adensam E, Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-44, REF-GTECI-EL, TASK-A-44, TASK-OR GL-81-04, GL-81-4, NUDOCS 8112020682 | |
| Download: ML20033C118 (2) | |
Text
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}lt;/,*L Dunn POWER COMI%NY y
Powru Dutt.otNo i
I; 422 SouTu Cnuncu STREET, CHARIDTTI:, N. C. 2824a
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November 25, 1981
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Mr. Harold R. Denton, Director
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Office of Nuclear Reactor Regulation b
U. S. Nuclear Regulatory Commission
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Washington, D. C.
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DEC1 19816. To Attention:
Ms. E. G. Adensam, Chief visi mosa nusanne -
Licensing Branch No. 4 3
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s Re: McGuire Nuclear Station 9
(,y Docket Nos. 50-369, 50-370 Loss of All AC Power (Generic Letter 81-04)
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Dear Mr. Denton:
Mr. D. G. Eisenhut's (NRC/NRR) letter of February 25, 1981 (generic letter a
81-04) discussed unresolved safety issue A-44 (station blackout events),
and requested we review current plant operations and provide an assessment of the existing or planned facility procedures and training programs with respect to several items related to loss of all AC power.
Duke Power Company is participating in the program outlined in Westinghouse Owner's Group letter OG-56, dated April 9, 1981, and as a result revised the schedule for completicm of the actions specified in generic letter 81-04 (reference letter W. O. Parker to H. R. Denton, dated June 1, 1981).
Please find attacned the requested assessment for the McGuire Nuclear Station (units 1 and 2).
Note that several items are ge.eric to Westinghouse plants and are principally addressed in the Westinghouse Owners Group procedure guideline for loss of all AC power (submittal will be via Westinghouse Owners Group letter OG-64, dated November 30, 1981), while the remainder are plant specific. Should you have any questions concerning the information, please advise.
Y truly yours, w_._
William O. Parker, J.
PBN:ls Attachment cc: Faul Bemis Mr. James P. O'Reilly, Director Sr. Resident Inspector U. S. Nuclear Regulatory Commission McGuire Nuclear Station Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 PDR ADOCK 05000369
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'Dt;ke Power Company McGuire Nuclear Station Response {.o NRC Generic Letter 81-04 Concerns C
DukePowerCompanyconddctedareviewofthecurrentplantoperationsfor
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h t event and to implement, as necessary, emergency procedures and a training the McGuire Station to determine the capability to mitigate a station black-
\\l' program.for station blackout events. As a result of this review and our e
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p,articipation in the preg' ram outlined in Westinghouse Owners Group Letter
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AG-56 (dated April 9, 1981) the following assessment of McGuire procedures
'aud training programs was made with respect to the concerns expressed in NRC c -
generic letter 81-04.
As a result of generic letter 81-04, a station procedure covering loss of all AC power was, written. Among the considerations used to develop this procedure
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were the maAntenance of heat removal capability and reactor coolant inventory b
control with availabld equipment (including possible unavailability of auxiliary systems such as ventiletion and component cooling); the estimated time available AC power, including, and its basis; actions required to restore emergency onsite to restore'AC power diesel generator loading sequence considerations and the unavailability of AC power; and precautions to prevent consequential equipment f
damage due to th$ return of AC power. These considerations were also used by Westinghouse in the development of their generic guideline for loss of all r AC power. The relommendations in this guideline with respect to the above considerations have been incorporated into the loss of all AC power procedure.
l In addition to the above generic considerations, various plant specific considerations were included in the development of the procedure. Restoring offsite AC power in the event of a loss of the grid by connecting to Cowans Ford Hydro Electric Station through the switchyard was incorporated into the procedure. Resteration of offsite AC power when the loss of power is due to postulated onsite equipment failures was considered in the development of the
' procedure. One method for power restoration is installation of a spare main f ' step-up t3ansformer which is maintained onsite for emergency use.
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y-Considera'tio. of emergency lighting tequirements in equipment areas where operator or mintenance actions may be necersary is accounted for in the plants design, which provides two separate DC emergency lighting systems for the control room, duxiliary building, turbine building, and reactor building.
In Gddition, on,-shift training has been conducted to familiarize licensed l
personnel wit", the " loss of all AC power" procedure and its bases. Annual requalification' training will include simulator exercises involving loss of all l*
AC power and training in the use of the new procedure. The loss of all AC 7 power procedure was developed using the considerations of genrric letter 81-04.
Therefore, it is concluded that McGtdre Nuclear Station has met the requirements l
, established in this letter.
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