L-79-170, Forwards Requested Info Re Feedwater Line Design & Fabrication History
| ML17206A865 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 06/20/1979 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| L-79-170, NUDOCS 7906220309 | |
| Download: ML17206A865 (6) | |
Text
REGULATORY-INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:7906220309 DOC ~ DATE: 79/06/20 NOTARIZED!
NO FACIL:50-335 St. Lucie Plant~
Unit ii Florida Power 8 Light Co>
- AUTH,NAME AUTHOR AFFILIATION UHRIGiR E ~
Florida Power L Light Co ~
RECIP INANE" RECIPIENT AFFILIATION STELLOrV Division of Operating Reactors DOCKET 05000335 SUBJECT; Forwards requested info re feedwater line design 8
fabrication history'ISTRIBUTION CODE:
A001S COPIES RECEIVED:LTR +'NCL SIZE:
TITLE: GENERAL DISTRIBUTION FOR AFTER lSSUANCE'F OPERATING'O'IC gpyg8; E4QLQ, g>CI+IUCE> 73, EAggggg REC IP IENT ID CODE/NAME ACTION:
05 BC ega INTERNAL:
REG 12 15 CORE', PERF BR 17 ENGR BR 19 PLANT SYS BR 21 EFLT TRT SYS OELD EXTERNAL: 03 LPDR 23 ACRS 1
COPIES CTTR ENCL "7
7 1
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2 1
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16 16 RECIPIENT ID CODE/NAME 02 NRC PDR ill TA/EDO 16 AD SYS/PROJ 18 REAC SFTY BR 20 EEB 22 BRINKMAN 00 NSIC COPIES LTTR ENCL 1
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'1 JVH g5 Q7g TOTAL NUMBER OF COPIES REQUIRED:
LTTR 39 ENCL 38
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Box 529100
'ami, Florida 33152
~~tI <flA'glop FLORIDA POWER & LIGHTCOMPANY June 20, 1979 L-79-170 Office of Nuclear Reactor Regulation Attention:
Nr. Victor Stello, Director Division of Operating Reactors U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555
Dear Nr. Stello:
Re:
St. Lucie Unit 1 Docket No. 50-335 Feedwater Line Information Enclosed for your information and use is Florida Power
& Light Company's response for St. Lucie Unit 1 to the information on feedwater line design and fabrication history requested in your letter of May 25, 1979.
Due to the amount of'aterial and the short time period required to
- respond, we are providing one copy of the attached information.
Please advise us if additional copies
,are necessary for your review.
The remaining information requested in your,'ay 25, 1979 letter will be forwarded to you by July 30, 1979.
Very truly yours, Robert E. Uhrig Vice President Advanced Systems
& Technology REU:TCG:cf Enclosure cc:
J.
P. O'Reilly, Region II Harold F. Reis, Esquire e><: Ae Ls scag p~
So V968IIM 3af PEOPLE... SERVING PEOPLE
DESIGN ITEM 1
~Re uest "Provide as-built piping or isometric drawings of the feedwater line to steam generator sparger within containment.
Show details of the design such as dimensions, pipe schedule, support type and locations, pipe restraints, and valve(s)."
~Res onse a.
As-built piping isometrics are shown in Ebasco drawing No. 8770-3596 (Attachment 1).
b.
Feedwater pipes inside containment as shown in above drawings are 20" and 18" schedule 80 Carbon Steel ASTM A-106 Grade B.
There is only one valve (check valve) located below the Steam Generator Nozzle for each Feedwater line.
c.
Piping restraints and support location are indicated in the stress isometric drawings BF-147-1 and BF-147-4 provided in Attachment 2.
Piping Support locations and types are provided in Attachment l.
ITEM 2
~Re uest "Provide the results of any stress or fatique analyses which was performed for this system."
~Res onse The stress analysis results for the feedwater piping inside containment are given in the summary table provided in Attachment 2.
The stress analysis detai1 calculation and results are also given in Attachment 2.
FABRICATION HISTORY ITEM 1 Receuest "Supply a list of the materials for the steam generator
- sparger, steam generator feedwater nozzels and feedwater piping inside containment."
~Res onse The requested materials are as follows:
a.
Feedwater ring assembly (See attachment 4 for details).
Feedwater ring 12", schedule 40, Carbon steel, SA-106-Grade B.
Feedwater sleeve 16", schedule 30, carbon steel, SA-106-Grade B.
b.
Feedwater nozze1 assembly.
(See attachment 4 for details).
- Nozzel forging alloy steel, SA-508, Class II.
Safe end carbon steel, SA-508, Class X.
c.
Feedwater piping seamless pipe, schedule 80, carbon steel, ASTM-A-106, Grade B.
ITEM 2 Receue st "Provide the details of the welding process(es) used to make the nozzel-to-pipe, pipe to sparger and piping welds.
Include details of welding such as preheat, joint configuration (include with our without backing ring), and post weld heat treatment.."
~nes onse Feedwater piping and nozzel-to-pipe welds.
Welding of feedwater piping inside containment including nozzel-to-pipe welds was performed in accordance with welding Procedures WP-24 and WP-39 which are included in Attachment 3.
The steps followed in the welding process are given below:
l.
Welding joint configuration was prepared per Ebasco Design Guide M4-4 for consumable insert or open root welding.
2.
Gas Tungsten arc welding process was used for first (SFA 5.18, E70S-2 filler metal).
Remainder of weld using manual shielded. metal arc welding process with electrodes.
2 weld 1ayers joints were welded SFA 5.1, E7018
FABRICATION HISTORY (Continued) 3.
Preheat temperature requirement was 250'F Min.
4.
Postweld heat treatment was specified at 1150-1250'F for one hour per inch of thickness.
5.
Required NDE was 100% radiography, 100% magnetic particle or liquid penetrant plus 100% visual examination.
Pipe-to-sparger welding refer to attachement 4 for details.