ML19269E772

Forwards Info in Response to 790525 Ltr Re Feedwater Line Cracking.Addl Info Will Be Submitted by 790727

ML19269E772
Person / Time
Site:	Three Mile Island
Issue date:	06/26/1979
From:	Herbein J METROPOLITAN EDISON CO.
To:	Reid R Office of Nuclear Reactor Regulation
References
GQL-0807, GQL-807, NUDOCS 7906290608
Download: ML19269E772 (11)

Text

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Metropolitan Edison Company j e Post Office Box 542 i

'- Reading Pennsylvania 19640 l 215 929-3601 Wnter's Derect Dial Number i

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.' June 26,1979

- GQL 0$0'7 1

Director of Nuclear Reactor Regulation Attn: ?. W. Reid, Chief

{ Operating Beactors Eranch No. k i U.S. Nuclear Regulator" Cc= mission l Washington, D.C. 20555 i

Dear Sir:

l Three Mile Island Nuclear Station, Unit 1 (DE-1) l Operating License Nc. DPR-50 q

} Docket No. 50-289 l Feedveter Line Cracking h

Enclosed please find the first part of our response to your letter of May 25, 1979 (received May 29, 1979) eeneerning feedvater line cracking. The balance of the information for DE-1 vill be submitted by July 27, 1979 3

Sincerely, t

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{ v. G. Herbein i Vice President Generation I. JGE:WSS :cr=

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, Enclosure I

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! 2143 008 7906290 Gdf Metropo::*an Edison Company is a Memt.er of tne Genera' Pubhc Utt!:es Syaern

i Design I

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1. Provide as-built piping or isometric drawings of the feedvater line to f steam generatsr sparger within containment.

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i Answer: The requested information concerning the feedvater piping is j shown on Gilbert Associates drawings B-312-506 and B-312-507, which are i enclosed. Details of the feedvater header and no::les are shown on f

Babcock & Wilcox drawings 131150E,131123E, and 131122E, all enclosed, i

t 2. Provide the results of any stress or fctigue analyses which were per-formed for this system.

Answer: The results of the stress analyses for deadweight, thermal and seismic stress are attached. No fatigue analysis was performed.

Fabrication History

, 1. Supply a list of the materials for the steam generator sparger, steam

! generator feedvater no::les and feedvater piping within containment.

i Answer: Gilbert Associates line specification 900-1 attached, lists the materials used in the feedvater piping between the penetration and feed-vater header.

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Materials for the feedvater header and no::les are provided in the attached

? Table-1. Part nunbering is identical to that on the previously listed

' Eabcock & Wilcox drawings.

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j 2. Provide the details of the velding process (es) used to make the nozzle-to-pipe, pipe to sparger and piping velds.

Answer: Details of the velding procedure used in the field to make the piping velds and pipe to header velds are listed in Table II. Weld joint configuration is detailed in Gilbert Associates, Inc. drawing no. D-301-001, Figure 3, which is attached.

DetLils of the feedvater he,ader and no::le velds procedures are being assenbled by Babcock and Wilcox and vill be supplied by July 27,1979 as requested in the NEC letter. Joint designs are shown on the previously referenced B&W drawings and are su--arized in Table III.

3 Provide the NDE perfor=ed during and after fabrication of the veld seints requested in question 2.

? Answer: The NDE requirements for these velds are summarized in Table IV.

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h. Provide the Code edition to which the feedvater piping system was fabricated.

Ansver: The feedvater piping for TMI-1 was designed and erected in accordance with USAS B31.1, Power Piping.

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i i Fabrication History (continued) 1 5 State the fracture toughness requiremen+s, if any, for the feedvater 5 piping syst=.

4 Answer: No fracture toughness requirements were imposed on the feedvater

, piping system.

i Preservice/ Inservice Inspection and Operating Eisto:y tv r To be supplied by July 27, 1979 ,p 1

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Table 1 - Material list, feedvater header, and no: les l

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PART NO. USED FOR PART NAME MATERIAL 120-121 FW header Feedwater inlet header SA-106 Grade B 122-123 .

12k FW header 1k" sch. 80 tee A-23k-WPB 127 FW header End cap inlet header A-234-WPB 301/20h FW header Feedwater riser connection A-508-6h c1 1 320 Spray no::le Reducer SA-106 Grade B 321 Spray no::le Flange SA-105-2 322 Stray no::le Transition ring SA-106-B 323 connecting pipe Bolting 11ng SA-516-70 133 Connecting pipe Pipe SA-106 Crade B l

!i 134 Connecting pipe Long tanbent elbow A-23h-WPB n

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I Table II - Su-an of Weldine Procedures Procedure Number 1-20 Various Contractor UE&C B&W Construe +' u )

Welds Feedvater niping Various y Process Consu=able Insert To be supplied Root, GTAW fill, by 7/27/7,9 )

Finish with SMAW

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- Joint Design Single 37% bevel, Ref: GAI D-301-001, Tig. 3 .,

h Preheat Temperature 60 F Interpass Te=perature Hone - Do not

- ._ interrupt velding l until 3/8" is co=plete I

! Fostheat Te=perature 1100-1200F Time 1 hr.

Heat / Cool Heat - LOOF /hr. nax.

Rates Cool - 200F/hr. mar.

to 9007 then slow cool v/ insulation on Details of Welding Root rass Process GTAW Filler - Tepe Consu=able Insert Size 1/16 x 3/16 Chem. P-1 Qpe Electrical Current DC 2143 012 Folarity Straight Volts 9-12 fcps95-105 Gas & flow rate h gon, 20 CFM GTr4 tasses V

- Filler Type E60S-2 or RG-65 Page 1 of 2

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I Table II - S"~av of Weldine Procedures 4

i GTAW passes (cont.)

Siz- 1/16 or 3/32 .

Electricta Current DC Polarity Straight Volts 9-13 A=ps95-105 Gas Argon F1bv rate 20 CFM -

SYAW

! Filler Type E-7016 or 7018 i Size 3/32 - 1/8 - 5/3?

! Electrical i Current DC I Polarity Reverse Volts 20-26 A=ps 3/32 80

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1/8 - 100-125 5/32 - 125-160 t

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i Table III - B&W Joint Design References B&W B&W Joint Description Numbers Joined Drawing Weld Prep. Detail Completed Weld Detail Riser pipe to elbow 133-134 131123E B C h" pipe to reducer 137-320 131123E S T  ;

Reducer to transition ring 320-322 131123E U V Flange to transition ring 321-322 131123E K L Feedwater pipe to nozzle A134-A137 131150E B C Feedwater pipe to header A134-A122/A123 131150E B C Feedwater header to riser connection 20h-120/123 131122E A-A A-A Feedwater i to 14" tee 124-120/123 131122E B F Feedwater .g to 1h" tee 124-FW piping 131122E C GAI D301-001 Fig. 3 Feedwater header to 14" cap 127-120/123 131122E B F i

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Table IV - Weld Non-destructive Encination f

B&W Fart B&W EE Required Joint Description Nu=bers Joined Drawing RT MT Visual Notes (Note 3) _

Riser pipe to elbov 133-13h 131123E X 1 h" pipe to reducer f 137-320 131123E 1 '..

Reducer to transition ring 320-322 131123E 1 Flange to transition ring 321-322 13n23E I 1 Feedwater pipe to nozzle A134-A137 131150E X 1 Feedwater pipe to header A13k-A122/A123 131150E I 1 Feedwater header to riser connection 20k-120/123 131122E I 1 Feedvater header to 14" tee 12k-120/123 131122E X X 1 Feedvater piping to 14" tee 12k-FW Piping 131122E X X _X 1,2 Feedwater header to 1k" can 127-120/123 131122E I I 1 l Feedvater piping GAI D301- X X 2 001

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s Notes:

1) Additional information on inspections being compiled by B&W - vill be provided by 7/27

2) 5% rando= radiography on butt velds

3) Visual on final veld only 2143 015

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3 SP-5661 1 Reissued 4-20-71 nevised 4-7-72

(/ Line Spec, No. 900-1 Symbol A Pine Scamless Carbon Steel, ASTM A 106-67, Grade B 8" and larger - Schedule 100 6" and smaller - Schedule 80 Fittings 2-1/2" and larger - Carbon Steel, ASTM A 234-65, Grade WPB, same schedule as pipe, butt wcld 2" and smaller - Forged carbon steel, ASTM A 105-65 or A 105-71, Grade II, 3000 psi, socket weld Flances i Iorged carbon steel, ASTM A 105-65 or A 105-71, Grade.II

_s 2-1/2" and larger - 900 lb R.F. welding neck k/

2" and smaller - 1500 lb socket veld Gaskets Flexitallic gasket Style CC, Type 304 SS and asbestos filler, 0.125 in. to 0.135 in. thickness after compression. f-Boltine ASTM A 193-68, Grade B7 Hex Nuts ASIM A 194-68, Grade 2H Joints 2-1/2" and larger - Butt veld 2143 018 2" and smaller - Socket wcld Final FW Header

.. Final FW Header to bc 30 in. OD ASTM A 155-6L, Grade KC 60, Class I pressure

'( * 'j vessel or firebox quality, including supplementary test S4 (Magnetic Particle Inspection). Minimum uall thickness to be 1.70 inches. Nozzles to be Weldolets or EQUAL.

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