ML17338A942

Responds to 790525 Request for Info Re Fabrication,Insp & Operating History of Feedwater Lines

ML17338A942
Person / Time
Site:	Turkey Point
Issue date:	07/31/1979
From:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
To:	Stello V Office of Nuclear Reactor Regulation
References
L-79-209, NUDOCS 7908030171
Download: ML17338A942 (8)

Text

RKGULATORY 'FORMATION DISTRIBUTION SY~M (RIDS)

ACCESSION NSR:79080S017'OC.DATE: 79/07/21 ROTARIES: NO DOCKET 0 FACIL:50-250 Turkey Point Plant~ Unit 3~ Florida Power and Light C 05000250 50-251 Turkey Point PlantE Unit 4i Florida Power and Light C 05000251 AUTH, NAME AUTHOR AFFILIATION UHRI G R ~ E ~ Florida Power 8 Liaht Co RECIPSNAME RECIPIENT AFFILIATION STELLOrVS Division of Operating Reactors

SUBJECT:

Responds to 790525 request for info re fabricationpinsp 8 operating history of feedwater CODEt A001S COPIES RECEIVED:LTR lines'ISTRIBUTION ENCL .SIZE:

TITLE: GENERAL DISTRIBUTION FOR AFTFR ISSUXHCE OF OPE~XTTivC CIC N PCe OTESe<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<w <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<s <<<<<<<<<<~<<<<<<<<<<<<<<pr<<<<<<<<<<<<

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL ACTION: 05 B 7 7 INTERNAL: 0 02 NRC PDR 12 iu TA/EDO 15 CORE,PERF BR 16 AD SYS/PROJ 17 ENGR BR 18 REAC SFTY BR 1,9 PLANT SYS BR 20 EEB 21 EFLT TRT SYS 22 BRINKMAN OELD EXTERNAL: 03 LPDR 23 ACRS '6 1 1 16 00 NSIC 1 1 AUG 6 >S)S TOTAL NUMBER OF COPIES REQUIRED: LTTR 39 FNCL 38

t o. BOX 629100, MIAMI,FL 33162

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Ak~~v~~kx FLORIDA POWER 4 LIGHT COMPANY July 31, 1979 8Eiggg $gg L-79-209 p pe(()

FIQt'jjj Office of Nuclear Reactor Regulation Attention: Mr. Victor Stello, Director Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Stello:

Re: Turkey Point Units 3 & 4 Docket.;Nos. 50-250 8 50-251 Feedwater Nozzles Our letter of June 19, 1979 (L-79-169) responded in part to your May 25, 1979 request for inforgation concerning PWR feedwater lines.

The remajning information on fabrication, inspection, and operating history is attached.

Very truly yours, robert E, Uhrig Vice President Advanced Systems & Technology REU/MAS/paf Attachment cc; J. P, OIRejlly, Region II Harold Reis, Esquire veo8osolg t PEOPLE... SERVING PEOPLE

DESIGN ITEM I EEIEUEST Provide as-built piping or isometric drawings of the 'feedwater line to steam sparger within containment. Show details of the support 'type and locations, design'uch as dimensions, pipe schedule, and valve(s). pipe'estraints, RESPONSE Addendum to L-79-169 dated June 19 1979)

As a result of Plant Change Modification (PC/H)74-102, hydraulic snubbers indicated on the support sketches, forwarded with FPL letter L-79-169 have been replaced with mechanical snubbers.

FABRICATION HISTORY ITEN 2 REBEUEST Provide the details fo the welding process(es) used to make the nozzle-to-pipe to sparger and piping welds. Include details of welding such as'preheat, joint configuration (include with or without backing ring), and post weld treatment, if any.

RESPONSE (Addendum'to"L-'79-,169"dated'June 19,'1979 The second sentence of the response in L-79-169 should be revised to read:

"The welding was performed with a backing ring and post weld heat treatment was not required,'owever, the nozzle to reducer weld did

. receive post weld heat treatment."

ITEN 3

~E(EUEST Provide the NDE performed during and after fabrication of the weld joints requested in question 2.

RESPONSE

All feedwater piping welds were 100% radiographed and surface examined as required by Specification 5610-H-50 Sections 6.113(a)2 and 6.11.5(a)..

Nondestructive examination was not performed on the steam generator spargers.

ITEN 4 RE UEST

,Provide the Code edition to which the feedwater piping system was fabricated.

RESPONSE

The feedwater pipin'g system was fabricated in accordance with ASHE.

Section I, 1965 including.all Addenda thru the 1966 Hinter Addenda, which was the Code in effect at the time of purchase.

ITEN 5 RE UEST State the fracture toughness requirements, if any, for the feedwater piping system,

RESPONSE

Neither the construction code nor the piping specification required impact testing for the teedwater piping.

PRESERVICE/INSERVICE INSPECTION AND OPERATING HISTORY ITEM I

~E(EUEST whether the feedwater system welds received

'tate a preservice inspection in accordance with ASNE B&PV Code,Section XI.,

RESPONSE

The Turkey Point Units 3 & 4 feedwater system welds did not receive a preservice inspection in accordance with the ASHE B&PV Code,Section XI.

ITEN 2

~RE UEST Provide the extent of inservice inspection performed on the feedwater pipe to steam generator nozzle welds. Include the results of the examinations, any corrective actions taken and causes of any failures;

RESPONSE

The nozzle welds on both Units 3 & 4 have not been radiographically tested as part of the routine Inservice Inspection Program. In addition, the nozzle welds on Units 3 & 4, have been inspected as described in FPL letter L-79-199 dated July 23, 1979 (supplementary response to IE Bulletin 79-13).

ITEM 3 RE(EUEST Provi de the schedule and extent of inservi ce inspection for the feedwater system for the next inspection interval.

RESPONSE

The feedwater system is a Class 2 system, therefore, inservice inspections are spread throughout the entire 40 year life of the plant. In accomplishing the routine Inservice Inspection Program, only a small portion of the feedwater system need be inspected during each period. However, feedwater system welds inside containment,- including the connection to the auxiliary feedwater system outside containment, either have been or will be inspected in accordance with IE Bulletin 79-13. (Refer to FPL letter L-79-199 dated July 23, 1979).

ITEN 4 RE(EUEST Provide any history of water hammer or vibration in the feedwater system and design changes and/or..actions taken to prevent these occurrences.

RESPONSE

The information .on water hammer forwarded to Nr.:George Lear on July 3, 1975.

in FPL letter L-75-246 is still applicable, i.e., there have been no.

confirmed water hammer occurrences in steam generator,feedwater piping since implementation'f the modifi cations described in the letter to ter. Lear .

t NOTE: With respect to the water hammer issue, an evaluation is being conducted by our Architect-Engineer in conjunction with recent feedwater'nubber damage,]

ITEN 5

~E(EUEST Provide a'description of feedwater chemistry controls and a summary of chemistry data.

RESPONSE

A description of chemistry specifications can be found in westinghouse proprietary i<CAP 73-33, Book 4 entitled "Stearq Side Wqter Chemistry Control Speci ficati ons."

A summary of minimum and maximum values of pH, conductivity, Amerzine, and disso1ved oxygen is contained in Table 1 (attached).

period from July, 1978 through June, 1979.

It covers the one-year

TABLE 1 Conductivitv Amerzine'issolved Ox en ml n. max. min. max. min.:.. max. =

min. max.

Unit 3 7/7,8 8.88 9.16 2. 56 5.0 <1 58 <5 <5 8/Z8 8.68 9 '6 2-.4 4. 0 7 40 <5 <5

-9/78 8.85 9.24 3.2 5.5 <1 82 <5 <5 10/78 8. 77 9.15 2.5 5 '5 4 54 <5 <5 11/78 8.67 9.38 1.6 4.2 <1 191 <5 <5 12/78 8.38 9.27 1. 17 4.95 <1 110 <5 5 1/79 COLD SHUTDOHN 2/79 COLD SHUTDOWN 3/79 COLD SHUTDOWN 4/79 5/79 6/79 8.46 8.80

8. 59 9.32 9.25 9.16 2.15 2.0 1.65

'.38. 25 4.25

<1 3

0 70 49 44

<5

<5

<5 10 5

Unit 4 7/78 8. 91 9.16 2. 55 4.10 <1 157 8/78 8. 89 9.16 2.6 4. 55 9 187 <5 <5 9/78 COLD SHUTDOWN 10/78 8.80 9.09 3,55 <1 73 <5 11/78 8.69 9.26 1.5 6.25 13 54 <5 <5 12/78 8. 77 9. 26 2.3 6.4 5 .80 <5 <5 1/79 8.73 9.35 1.8 6. 45 <1 56 <5 2/79 3/79 8.46 8 '2 8.93 9.32 9.35 9.21 2.15

2. 05 2.7 8.25 5 '5 3.5

<1 1

'0,70 28

<5

<5

<5

<5 5

5 4/79 11 5/79 REFUELING 6/79 8. 82 9-18 2. 5 4.3 6 50 <5