ML18114A725

From kanterella
Jump to navigation Jump to search
Forwards Addl Info Re PWR Feedwater Lines,In Response to NRC 790525 Request.Util 771202 Ltr & NRC 780607 Ltr Re Feedwater Lines Encl
ML18114A725
Person / Time
Site: Surry  Dominion icon.png
Issue date: 06/20/1979
From: Stallings C
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To: Stello V
Office of Nuclear Reactor Regulation
Shared Package
ML18114A726 List:
References
492, NUDOCS 7906250311
Download: ML18114A725 (6)


Text

  • f e VIRGINIA ELECTRIC AND PowER COMPANY RICHMOND,VIRGIN.J:A 23261 June 20, 1979 Mr. Victor Stello, Jr., Director Serial No: 492 Division of Operating Reactors PO/FHT:baw Office of Nuclear Reactor Regulation Docket No. 50-280 U. S. Nuclear Regulatory Commission 50-281 Washington, D. C. 20555 License No: DPR-32 DPR-37

Dear Mr. Stello:

Surry Power Station Units No. 1 and 2 Information on PWR Feedwater Lines We have reviewed your letter of May 25, 1979, requesting information concerning feedwater piping. In response, the Virginia Electric and Power Company hereby submits the attached documents for Surry Power Station Units 1 and 2. Any additional information will be forwarded as a supplemental response by July 27, 1979.

Very truly yours, C. M. Stallings Vice President-Power Supply and Production Operations Attachment Nof e. *. Ottaw ,.,.~.r ii ola1t:r re e f ;,/ To

£~'3,. l~f'O"' C' ~

II()()/ I s

r',*

  • I SURRY POWER STATION UNITS NO_. 1 AND 2 RESPONSE TO NRC REQUEST FOR INFORMATION ON PWR FEEDWATER LINES

,.. REF: REQUEST DATED MAY 25, 1979 TO ALL PWR LICENSEES

Pag2 1 of 4

, I. ,.

.' I. DESIGN

1. Feedv1ater Pipe: 14" Searuess l\STI-'r-Al06, Gr. B; Sch. 80; Mark Ho. P58-106B See attachment for isorretrics:

12846.22-r1KS-100Gl Unit 1 Loop A 12846.22-MKS-lOlGl Unit 1 Loop B 12846.22-r1KS-102Gl Unit 1 Loop C 12846. 27-Ii.1KS-l00Gl Unit 2 Loop A l2846.27-l'1KS-l01Gl Unit 2 Loop B 12846. 27--1'1KS-i02Gl Unit 2 IDop C 1105 J28 (Sheets 1 through 3) Feedwater Ring Assy.

2. Unit 1: See Stone and Webster Nozzle and PenetrationSurrmary, dated 6/03/79.

In particular, see Table 3- 2, System and Problem ]\1a. 's 323B, 322B, 334B. (attachrrent)

Unit 2: Sumnary not complete.

I I

Page 2 of 4 e

II. FABRICATION HISTORY Steam Generator Feedwater ring:

SAlOG; Gr. B; 10" Sch. 80; Wt. -2050ft (also see attached drawings 1105J28, sheets 1-3)

b. Steam Generator Feedwater Hozzles:

SA508; Class 2, lG" :tbzzle O.D.

Hi" x 14" Sch. 80 Reducer A234 WPB

c. Piping:

1\106; Gr. B; Sch. 80

d. Feedv1ater Crossover .Assenbly:

SAl06; Gr. B; Wt. 450#; 16" 0.D. x 52.21" LG.

2. a. lbzzle to Pi:r::e: 16" X 14" Reducer to Steam Generator Feedwa~r Nozzle Preheat: 200° Root: Heliarc Remainder: Electric Stick J-Bevel: EB Insert Stress Relief: 1140° 6 hrs. 25 min.
b. Pir:e Welds:

Preheat 200° Root: .MIG .

Remainder: Electric Stick Open Butt

Page 3 of 4 II. FABRICATION HISTORY (CONT'D.)

c. Pipe to feedwater ring: Not available
3. a. Nozzle to Pipe:

Radiography, Magnetic particle

b. Pipe to Pipe:

Radiography, Liquid Penetrant

c. Pipe to feedwater ring: N.A.
4. USAS B31.l 1967
5. N.A.

.! .J Page 4 of 4 e e III. PRESERVICE/INSERVICE INSPEcrION AND OPERATING HISTORY

1. Ho - Prese:rvice ~,as based on Section XI of the 1970 edition of the ASME Boiler and Pressure Vessel Code; Feedwater line inspection was not required.
2. IJo - Inservice inspection was based on Section XI of the 1970 edition of the ASME Boiler and Pressure Vessel Code through 1972 addenda; Feedwater line inspection was not required.
  • Ha,.1ever, the Feedwater Line Nozzle area* in Unit 1 was examined with Radiography and Liquid Penetrant in June 1979, for information only.

The inspection area included 12" from the nozzle weld. NJ rep:::>rtable

  • indications were noted.
3. Surry Unit 1 and 2 are in the process of updating the Technical Specifications to conform with later editions of the code. The extent of future inservice .

inspectio::1S on the Feedwater Line is not known at this tine.

4. Reference f ollcwing attached corresp:::>ndence behveen Vepco and NRC dated Dec. 2, 1977 through Jan. 12, 1978. Also NUREG-0291 dated Oct. 5, 1977.
5. Both Units 1 and 2 used Phosphate chemistry prior to 1979.

Unit 1 changed to AVT Jan. 2, 1979 Unit 2 changed to AVT ,Jan~ 4, 1979 For control data, see attachrrent.