ML20024E920

Submits Addl Info Re Spent Fuel Storage Racks Requested by NRC 830819 Telcon.Any Postulated Load Drop During Rack Removal Process Will Not Endanger Safety Injection Refueling Water Storage Tank

ML20024E920
Person / Time
Site:	Fort Calhoun
Issue date:	08/23/1983
From:	William Jones OMAHA PUBLIC POWER DISTRICT
To:	Clark R Office of Nuclear Reactor Regulation
References
LIC-83-216, NUDOCS 8309070213
Download: ML20024E920 (3)

Text

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l Omaha Public Power District 1623 Harney Omana. Nebraska 68102 402/536-4000 August 23, 1983 j LIC-83-216 -

Mr. Robert A. Clark, Chief U. S. Nuclear Regulatory Commission Of fice of Nuclear Reactor Regulation Division of Licensing Operating Reactors Branch No. 3 Washington, D.C. 20555

Reference:

Docke t No. 50-285

Dear Mr. Clark:

Spent Fuel Storage Racks As requested by Mr. John Ridgley of your staff during a tele-phone conversation on August 19, 1983, the following addi-tional information is provided.

The Omaha Public Power District's letter to the Commission dated August 1, 1983 transmitted a document entitled " Safe Load Path for Removal and Installation of the Spent Fuel Storage Racks." In Sections V.A.4 and V.B., references are made to a specific location for the movement of the spent fuel rack, followed by a statement that "By stopping here, the safety injection refueling water tank will be cleared."

The intention of that statement was to document the fact that the integrity of the safety injection refueling water tank would not be jeopardized during the movement of the new or old spent fuel storage rack. The area bounded by column 4B and beam B-123 at elevation 1025'-0" (see attached sketch) is provided with a 2-1/4" thick steel plate 8'-0" wide and 13'-8" long to protect the 6" thick slab. This 2-1/4" thick steel plate is adequate to handle any postu-lated load drop in this area during the rack removal pro-cess. The existing racks weigh less than 10,000 lbs. each.

A detailed load drop analysis was performed for this area for a 15,000 lb. load drop. This analysis was performed by Stone & Webster as part of the study entitled " Sample Cask Drop Analysis and Removal Procedure." This analysis, in part, concluded that subject to installation of the 2-1/4" thick plate discussed above, a cask drop accident in the area bounded by column line 4B and beam B-123 at elevation 1025'-0" will not endanger the safety injection refueling water storage tank located directly underneath this area.

8309070213 830823 PDR ADOCK 05000285 p PDR [()C),

455124 Employment with Equal Opportunatu Male / Female I O

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Mr. Robert A. Clark-LIC-83-216 Page Two

' Considering the' fact that-the existing racks weigh less than the. spent fuel cask referenced in thc above analysis and will not be raised any~ higher than the postulated drop height-for the spent. fuel cask, it can be safely concluded that any postulated load drop during the rack removal pro-cess will not endanger the -safety _ injection refueling water storage tank.

If you have any additional questions on this, please advise.

Sin ely, b

W. C. Jones Divis n Manager Produl tion Operations WCJ/KJM:jmm cc: LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.

Washington, D.C. 20036 Mr. E. G. Tourigny, Project Manager Mr. L. A. Yandell, Senior Resident Inspector 4

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