ML19319D272

Transfer of Lead Responsibility for Burnable Poison Rod Assemblies Movement from IE to Div of Operating Reactors

ML19319D272
Person / Time
Site:	Crystal River
Issue date:	04/07/1978
From:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:	Stello V Office of Nuclear Reactor Regulation
References
IE-ROI:78-03, IE-ROI:78-3, NUDOCS 8003130910
Download: ML19319D272 (2)

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SUBJECT:

. !OVEMENT OF BURNABLE POISON ROD ASSE?iBLIES FROM CRYSTAL RIVER WIT 3 COPr U RESPONSI3LE ASSISTANT DIRECTOR: ~ K. V. Seyfrit y DESCRIPTION OF ITEM REQUIRING RESOUlTION: Florida Po-ter Corporation has discovere.1 that two burahm poisen rod assecblies have noved out of their neraal' positica in the Crystal River Unit 3 core. The probica was disclosed as a resait of noise signals frcn the "B" steam ocnerator noise ronitor, detected during reactor operatica. On the sixth of March, felicwing reactor shutdc% battered parts n ca a burnable poison rod assachly were found. in the tcp of the 3 steam generator. -These inc1 M ed tna coupling asse dly;and pieces of paisen rod. After vossal head remal a second poison; rcd csserchly was found to have teved about six feet.out of the core.phere it remainod fixed. Sone of the poison rods have brokca':frca this assembly and rc: rained down in the' core. Fire fuel assedlies!were reaoved from the core, by the licensen, to disclose note pieces of broken poisdonrod -in the structure belerthe core."Significant dacage was: caused by carts of. the first assembly impi.nging oni the."B" steam generator. upper tube .-414 %[.W ends. ( .;.7 =, ' ?f > y). ? vn ' l'. '% f, 4 sThe licensee plans;tofcompletely).defun'h.a.,..z,-11thefreactor and:currentlyr EL Ami estimates that. the." reactor.4111 remain; shutdown for froetlthree to ~. 3 M Mstimenths.r ?Thicadsefof thatburnable' poison'a'ssemblyim6vement'is not'. T'~ byet-kncwn. aThe coupling: assed11es'and some'of-the broken pieces of ^ ~ rod.fron both assemblies h~ ave beert sent to the <BBW facilities at ' - -""E ~

a. Lynchburs: Va.cfor ehmination.:1The poHon burnout of tile Crystal -

F" M River 7 core'is' reported'to".have :procsaded for enoughithatsthere is'no'" " M1onger:anyJsignificanttreact.tvity^affact-in:the burnablejpoison assembites. l l CJMDavistBe'ssefand1hree? Rile 0 Island?Uriit 2 ' however, toth havefsimilarN ~ e:-pym m:~rpp=Mhqy gl are}in early first. cycle 4perationh r i bhrnable p6isenbseeliefand l 1

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~. ' ~* are:~any r41ated generic problems with other Babcock-.and Wilcox plants' containing burnable pounn nserblics. 3. The Office of Inspection and Enforcement will follow the examina. i ..t on and corrective' efforts at.the site and,cif appropriate, at

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