RBG-21787, Updates Info Re Qualification Status of Seismic Category I safety-related Equipment.Seismic Qualification for NSSS Equipment Storage Rack F16-E011 Complete.Confirmation Encl Per Format Requested in NRC

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Updates Info Re Qualification Status of Seismic Category I safety-related Equipment.Seismic Qualification for NSSS Equipment Storage Rack F16-E011 Complete.Confirmation Encl Per Format Requested in NRC
ML20134G698
Person / Time
Site: River Bend Entergy icon.png
Issue date: 08/05/1985
From: Booker J
GULF STATES UTILITIES CO.
To: Harold Denton
Office of Nuclear Reactor Regulation
References
RBG-21787, NUDOCS 8508280036
Download: ML20134G698 (2)


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GULF STATES UTILITIES COMPANY POSTOFFICE BOX 2951 . BEAUMONT. TEXAS 77704 AREACOOZ 409 838-6631 August 5, 1985 RBG-21787 File G9.5, G9.20.8 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555

Dear Mr. Denton:

River Bend Station-Unit 1 Docket No. ~ 50-458 This response provides an update to previously supplied information regarding the: qualification status of seismic Category I safety-related equipment.

~ Seismic qualification for the Nuclear, Steam Supply System (NSSS)

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equipment storage rack (F16-E011) has been completed. The attached confirmation is being provided in the requested format of Enclosure 1 to the Staff's July 9,1985 letter.

Borg Warner globe valves, Specification 247.497, are currently scheduled to be seismically qualified before exceeding five percent of rated power. These valves were previously classified under Item 3 (b) of Gulf States Utilities Company's (GSU) July 22, 1985 letter (RBG-21,606).

The valves are now being classified under Item 3(a) of Enclosure 3 to the Staff's July 9,1985 letter which states the following:

... equipment necessary for low power operation (< 5%) which will not

-be qualified during low power operation...".

A justification for interim operation has been provided.previously as referenced in GSU's July 22, 1985 .l etter.

Sincerely, 8508280036 850805 8 PDR ADOCK 050

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J. E. Booker Manager-Engineering, Nuclear Fuels & Licensing River Bend Nuclear Group JEB/RJK/kt Attachment I

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ATTACHMENT RBS Seismic Qualification Program MPL No. F16-E011:" Equipment Storage-Rack"

1. .The analysis for the qualification of F16-E011 is complete.

, 2. The qualification report has been reviewed for the River Bend specific appl.ication and is acceptable.

3. The qualification documentation is .available for review.
4. The b' asis for seismic qualification of this device is' by analysis.

Since the rack structure is essentially a.large frame type structure, the analysis was based on finite element _ methods using an array of box beams, cruciform beams and fuel racks.

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