ML20135F753

Submits Tornado Missile Protection for Ultimate Heat Sink Update

ML20135F753
Person / Time
Site:	Waterford
Issue date:	12/10/1996
From:	James Fisicaro ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
W3F1-96-0216, W3F1-96-216, NUDOCS 9612130314
Download: ML20135F753 (3)

Text

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y Entt gy perations, Inc.

Killona. LA 70066 Tel 504 739 6242 mes J. Fisicato l

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W3F1-96-0216 A4.05 PR t

December 10,1996 l U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555

Subject:

Waterford 3 SES Docket No. 50-382 License No. NPF-38 l Tornado Missile Protection for the Ultimate Heat Sink Update l

Gentlemen:

! On October 21,1996, Waterford 3 submitted letter W3F1-96-0188 to the Nuclear Regulatory Commission (NRC) to address specific issues related to tornado missiles and the ultimate heat sink cooling towers. In the Concluding Remarks section of this letter, tentative completion dates were given for the rerouting of the affected conduit j and cables. The letter also stated that conditions may arise as work on the modification progresses that may require reevaluation or affect the scope and l

schedule of the modification. It was stated that Waterford 3 would apprise the NRC should this occur and if the schedule were to be revised.

On December 2,1996, a call was made to NRR to inform them of a delay in the original schedule. During the conversation, Waterford 3 agreed to provide a letter l with an update on completed work and a new schedule for completing the remaining )

work. That information is provided herein.

The original schedule to complete the conduit and cable relocation was underestimated. The factors listed below resulted in additional work or additional j time being required to safely and satisfactorily complete the modification: \0

. The time necessary to mobilize a work force of qualified electrical craft l

. The quantity and complexity of the seismically qualified conduit supports ADO 3

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9612130314 961210 l PDR ADOCK 05000382 P PDR l

Tornado Missile Protection for Ultimate Heat Sink Update W3F1-96-0216 Page 2 December 10,1996

. The number of and degree of difficulty required for concrete core holes

. The amount of 2" and 4" conduit to be routed (East and West Side)

. Other emerging plant issues of equal or higher priority

. The need to route additional 500 MCM cable for the Fuel Handling Building (FHB)

Motor Control Centers (MCCs)

Design work and field work proceeded concurrently to resolve the conduit routing problems in the West Cooling Towers. Design is presently over 95% complete for rerouting conduit and cable on the West side. Installation of the control cables for the Dry Cooling Tower (DCT) bypass and isolation valves (CC-134A and CC-135A),

CCW surge tank level indication and West DCT fans has proceeded to the point that termination and testing is in progress. Conduit for the DC voltage cables has been installed and the conduit for the 500 MCM cables is approximately 85% complete in the West Cooling Towers.

Design work to resolve the conduit routing problems in the East Cooling Towers is approximately 60% complete. Field work to penetrate the walls and floor of the Fuel Handling Building for the rerouted conduit is in progress.

With the exception of the termination and testing of the 500 MCM cables, all conduit and cable work in both cooling tower areas is expected to be complete by March 2, 1997. As discussed above, conditions have arisen that have resulted in the modification schedule being extended. All efforts are being made to support a completion date of March 2, but plant conditions and/or unexpected field conditions may still adversely affect the proposed schedule. Should any additional delays occur, it is anticipated that the amount of work involved will be minimal and will be completed prior to the beginning of Refuel 8. The start date for Refuel 8 is tentatively scheduled for April 11,1997.

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I l Tornado Missile Protection for Ultimate Heat Sink Update W3F1-96-0216 Page 3

December 10,1996 l The present schedule for completion of the 500 MCM cable work for both Cooling l Towers is March 7,1997. To complete this work, busses 3A314-S and 3B314-S l have to be removed from service. Each of these electrical busses supplies power to l a number of components in the FHB required for receipt of new fuel. The date for .

! completing work on the 500 MCM cables has therefore been established to ensure '

all work affecting the 3A314-S and 38314-S electrical busses is complete prior to beginning fuel receipt for Refuel 8.

Should you have questions regarding this matter, please contact Tim Gaudet at (504) 739-6666.

Very truly yours,

'\ Scaud l J.J. Fisicaro l Director Nuclear Safety JJF/DMU/ssf cc

L.J. Callan, NRC Region IV C.P. Patel, NRC-NRR R.B. McGehee N.S. Reynolds NRC Resident inspectors Office i

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