ML20084M198

Deficiency Rept Re Three Bent Instrument Nozzles on Reactor Coolant Pipe Spool 42-inch RC-503-01.Caused by Rigging &/Or Transportation of Spool to Reactor Containment Area.Nozzles Replaced

ML20084M198
Person / Time
Site:	Saint Lucie, Turkey Point, 05000000
Issue date:	05/30/1973
From:	Coughlin J FLORIDA POWER & LIGHT CO.
To:	Kruesi F US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084M161	List: ML20084M198 ML20084M205
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8306020038
Download: ML20084M198 (5)

Text

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O O P.O. BOX 3100 #AIAtAl, FLORIDA 33101 r_ mr y

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J u c-mm FLORIDA POWER & UGHT COMPANY May 30, 1973 Mr. Frank E. Kruesi, Director Directorate of Regulatory Operations U. S. Atomic Energy Commission Washington, D. C. 20545

Dear Mr. Kruesi:

Re: St. Lucie Plant Unit No. 1 Docket No. 50-335 Reactor Coolant Piping Incident Report .

As required by 10 CFR 50.55(e), we are filing a femal report covering an abnormal occurrence that occurred during cons.truction of St. Lucie Unit No. 1. This report covers bending of three instrunent piping nozzles on a pipe spool of the reactor coolant piping. The occurrence was previously reported verbally at the site to members of the Directorate ci. Regulatory Operations.

ours very truly, i

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• ames Coughlin YcePresident 4

JC:sd Attachment ec: Mr. Noman C. Moseley, AEC-Atlantit Mr. Jack R. Newman 1

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8306020038 730629

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REACTOR COOLANT PIPING INSTRUMENT N0ZZLE REPLACEMENT I Summary on May 1, 1973 it was reported by site quality control that three instrument nozzles appeared to be bent on reactor coolant pipe spool 42" RC-503-01 (see attached Exhibit A). The nozzles were the RTD nozzle, 510-01, and two Flow Measurement nozzles, 507-13.

The spool was removed from the reactor containment building and shipped back to Combustion Engineering's shop at Chattanooga for repairs. s -

II Description of Incident l

The subject spool was received on December 31, 1971. The spool was shipped.in a clear poly wrapping and secured to a wooden skid.

The spool was received and handled in accordance with CEND-353,

" Field Handling, Maintenance, and Storage Requirements for Combustion Engineering Furnished Equipment". In accordance with CEND-353, a visual inspection of the spool was performed by site Ebasco Quality Compliance. No bent instrument nozzles were noted. The spool was then covered by an additional green poly wrapping and stored.

Further, Material Receiving Report No. 849 was prepared and filed by Ebasco Site quality Control Personnel. No bent instrument nozzles were noted.

I The subject spool was removed from storage on April 26, 1973. A P&H Motor Crane with nylon slings was used to lift the spool to a flatbed. The flatbed was transported to the vicinity of the RCB Construction hatch and off-loaded with a P&H Motor Crane with nylon slings. No handling difficulties were reported.

On April 30th the night shif t piping crew rigged and moved the pipe spool piece into the reactor containment building and supported it approximately in its final location.

On the morning of Tuesday, Iby 1,1973, Broaddus Garnett, Quality l Control Welding Specialist, reported observing three instrument nozzles on Reactor Coolant Pipe Spool 42" RC-503-01 bent. Following Mr. Garnett's report, the night shift Quality Control and Construction logs were reviewed. Both logs indicated the nozzles were bent prior to rigging the subject spool into the containment.

! Further investigation revealed that Ballard Scalf, night shift Quality l

Control representative, had been requested by Harold Howel, night l shift Piping Supervisor, to inspect the instrument nozzles. Mr. Scalf confirmed that the nozzles were bent prior to rigging the subject spool into the containment. The procedure for moving the spool into place was continued with the thought that repairs might be made with it in its final location.

It may be inferred from the accumulated data that the bending of the instrument nozzles occurred during rigging and or transportation of Gke O@ool t@ the _ gcactor__ containment area. This is credible since

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the spool was covered with an opaque green poly wrapping.

III Corrective Action A - Repairs Pipe spool 42" RC-503-01 was shipped .back to Combustion Engineering's thattanooga shop on May 3, 1973. .Tius three bent nozzles were removed from the spool and replacements were attached using the same material and procedures utilized in the initial fabrication.

NDT was also the same as for the initial fabrication (see Exhibit B ASIE Forn NPP-1) . The spool was returned to the site May 14, 1973.

B - Action to Prevent Re-occurrence Procedures are being prepared to delineate the requirements for removal of wrappings prior to rigging and protection of appurtenances of ' reactor coolant piping prior to transportation.

IV Safety Implications There are no effects on the safety op'erations of the,St. Lucie Plant -

Unit 1 due to this incident as repairs and testing were performed in accordance with original Combustion Engineering procedures.

The adherence to new procedures regarding handling of such items will.

reduce the change of a reoccurrence of an incident of this type.

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A351 CFS'f: four flow neasurement nor les 3" Feh. 1AO. F166 A 11 M Ta 316: __

one shutdown cooline out, nozzle 12' 3/4"0D Sch. 160. A105-TT F '191 CFSM: ~

five R.T.D. nor:les 1" Sch. 160 B164 $

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R. H. Felton December 31. 1074 cemruoe of Ainthemats.n E apere.

' .CERTil'ICATE OF 51101' INSPEC110N -

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ihe sta .e Pr.eante o, Ohio on ,,.,,,,, ,a ,,, H . S . B . T . & T . ,,Unrt.. Cnnn. ,

haes entpected the paping de.cribes in this data report .n 'N 10.2 ?}._ . me J . tate that to the b.et of my knowle4e es.$ bolsif. the gnaer.f actiare r he. con.tructed this pip:ng.in ac cordanc e with t*te appi.c able .ection. of AS'.Id C.d e. Seetesa III. .<

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..e Dy Elgal A4 " hag cettsfieste nea'her the Inser gene nee hsa employer melse ene weer.nty, espee..eJ er imp!seJ. Concernen t the n 34;enJ JFaceite d en ths. Jef e repset. Feari'iemote, neiehee the in.p.et.,e rio, he. e-stseer shall be liab!e in any menner f.* ear par:ene.t insure er p.aperty desia g e .e e lo.. of .any h nJ e.i.ang from se eennect es wnh the. a.,.pect6on. .

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