ML19256E316

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Requests Analysis Showing That Reactor Cavity Annulus Seal Ring Cannot Become Destructive Missile During Continued long-term Operation or Statement That Seal Ring Will Be Removed by Next Refueling Outage
ML19256E316
Person / Time
Site: Farley Southern Nuclear icon.png
Issue date: 10/02/1979
From: Schwencer A
Office of Nuclear Reactor Regulation
To: Barton A
ARKANSAS POWER & LIGHT CO.
References
NUDOCS 7911020085
Download: ML19256E316 (2)


Text

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NUCLEAR REGULATORY COMMISSION If ;}

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50-348 Mr. Al an R. Earton Senior Vice President Ai abana Pcwer Ccm:any Fest Office Sex 2641 Birmingham, Alabama 35291

Dear Mr. Bart:

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We have reviewed ycur res:ense to cur letter dated February 2,1978, ir regard to the p tential for the reacter cavity annulus seal ring c beccme a destructive missile in the event cf a less-cf-ccolant accident pipe break inside the reactor cavity.

In your response, you indicated that the seal ring is in a raised

csition and dces not form a seal between the vessel and the cavity during reacter cperation. One licensee has informed h"RC that for their seal ring the raised position does not eliminate ;he ;essibility that the seal ring could beccme a missile folicwing a ;cstulated reactor coolans pipe rupture inside the reactor vessel cavity. Therefore, pursuant to 10 CFR 50.54 (f) of the Ccmmission's regulations you are requested to (a) demonstrate by appropriate analysis that the seal ring c,annot become a destructive aissile during centinued long-t,erm cperation
nd that it poses no threat to the health and safety of the y:ublic; or (b) furnish, a statement that the seal ring will be removed by no later than the nex refueling cutage.

Please respend witnin 60 days of ycur receipt of this letter.

Si ncerely,

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