ML19261E412

Forwards Partial Response to IE Bulletin 79-03 Re Use of Youngstown Longitudinal Welded Pipe in safety-related Sys. Volumetric Examination of Longitudinal Welds Has Begun.Fully Developed Program Will Be Submitted by 790622

ML19261E412
Person / Time
Site:	Arkansas Nuclear
Issue date:	05/14/1979
From:	Trimble D ARKANSAS POWER & LIGHT CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
NUDOCS 7907060417
Download: ML19261E412 (1)

Text

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/ /C ARKANSAS POWER & LIGHT COMPANY POST OFFICE 80x 551 UTTLE ROCK. AFMANSAS 72203 (501)371-4000 May 14, 1979 1-059-14 2-059-10 Mr. K.V. Seyfrit, Director .

Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011

Subject:

Arkansas Nuclear One- Units 1 & 2 Docket Nos. 50-313 & 50 368 License Nos. DPR-51 & NPF-6 IE Bulletin No. 79-03 (File: 1510.1 & 2-1510.1)

Gentlemen:

We have completed our review of the safety-related piping for Arkansas Nuclear One - Units 1 and 2 (ANO-1 & 2) to detemine the extent of use of Youngstown longitudinal welded pipe. The attached report will complete our response to requested action Itens 1 & 2 of the subject bulletin.

In response to requested action Item 3, development of a program for volumetric examination of the longitudinal welds and acceptance criteria has begun. However, due to the extent of the requested exam and the potential impact of the choice of the acceptance criteria, we will not be able to submit a fully developed program until June 22, 1979. Development of the program and accessibility of the piping will determine the completion date for the program. We will also supply this intended completion date when we submit the examination program.

Very truly yours, bcwv) 0 f David C. Trimble Manaaer, Licensing DCT: ERG:gw Attachmen t ,,,, ,iw<

74

{

cc: Mr. W.D. Johnson U.S. Nuclear Regulatory Commission P. O. Box 2090 Russellville, AR 72801 _

7 9 0,* u,6 0 % 7 p MEMOE A M'OOLE COUTH UTIUTIES SYSTEM

~

ARKANSAS NUCLEAR 1 ,

. UNITS 1 6 2 ARKANSAS POh":R 6 LIGHT COMPANY RUSSELLVILLE, ARYANSAS INVESTIGATION OF LOSGITUDISAL h' ELD DEFECTS IN ASIE S.^.-312 TYPE 304 STAINLESS STEEL USED IN SA:ETY-RELATED SYSTD!

NRC BULLETIN IE 79-03 DATEC fuRCH 12, 1979 A

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N by: \ i

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M. R. Osborne

CONTENTS

1.

SUMMARY

OF FINDINGS

2. FLOW DIAGRAM PROCEDURE "

e UNIT 1 PIPE o UNIT 1 PIPE SUPPORTS o UNIT 2 PIPE o UNIT 2 PIPE SUPPORTS

3. Lt.ST OF SUSPECT PIPE o UNIT 1 s UNIT 2

4. LIST OF SUSPECT PIPE SUPPORTS e UNIT 2 a

.,.q

,I+

r.

1. Summary During the period April 17, 1979 through April 23,1979 c systematic search wa c. ie of the piping documentation of '

Arkansas Nuclear One, L. sit I and 2. This scarch was initi-ated at the request of Arkansas Power 5 Light Co. for the purpose of satisfying steps 1 and 2 of NRC Bulletin IE 79-03.

The procedure used for the search is diagrammed in Section 2.

The results as summari:ed below are listed in detail in Sections 3 and 4 Initially the search covered all sizes of stainless steel pipe. The site was eventually licited to 6" and larger with approval from the resident NRC representative at the j obsite. This was based upon affirmation by the NRC that Youngstown Welding 5 Engineering had not produced any seam-welded ASTM A-312 or ASME SA-312 Type 304 stainless steel pipe less than 6" diameter.

Unit 1 Piping Decay Heat Removal System 166.68 ft.

Reactor Bldg. Spray System 513.75 ft.

Reactor Coolant System 13.0 ft.

Total 693.43 ft.

Pine Sucoorts None Unit 2 Piping Containment Spray System 3.36 ft.

Sace.y Injection System 69.5 ft.

Total 72.86 ft.

Pipe Succorts Containment Spray Sy.etem 7 ea.

Safety Injection System 10 ca.

Fuel Pool Cooling System 3 ea.

Total 20 ea.

, . b'

()

I

Tne footage *4 '

could not celisted located.includes some pipe spools for which These have been included as a precaution doct=enta$on

,n

- e. 1 caterial has been identified. For specific details, see

' til 2:1 ana'.ysis of the Unit 2 pipe supports was performed assuming no weld (C-Section) . Tne results indicated all but six (6) of the rupports would not fail even if there was a cocplete loss of the longitudinal .

weld.

The retaining six (6) supports' are carginal as their pipe tenbers would be in torsion during operation. These six (6) are listed below:

Dwg. No. Mark No- Dwg. No. Mark No.

H25-1304 2HCB-13-H H20-707 2GCB-7-H7 H20-703 '

GCB-7 u-a H20 <18 2cc3 7_g13 H20-721 2GC3-7-H21 H26-593C 2HCC-59-H30

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AREANSAS t.UCLEAR ONE NRC BULLETIN [E 79-03 j

00ccMENTArInti SE ARai 4/1/-4/23/ /9

! 2. Pipe Supports - Unit 2

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t i

/ \

List all suspect is *s Obtain line nos. Mark-up hanger index for pipe less s \ No Review hangers, supports f ro,n P&lD's

> which indicate STAR T (']h--is (safety,related) ----> all hangers on >/ than 6"?

,r

)  ? hanger sk e tclies- 55 pipe was used line nos. /

/ Yes

" /

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Stop o

Analyze to verify intergrity assum- Final N 3 ing total loss of Report - h END

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3. List of Suspect Pipe - Unit 2 System Iso. No. Spool No. Size Thickness Longht Ileat No. d d .

Containment 211CB-15-1 211CB-15-1-1 24" 10s O'-4 9/16" 521463 150 psi 300 F Spray 2'-11 3/4" 410427 Safety Injection 2GCB-9-1 2 GCII- 9 6 8" 20S l'-1 5/8" 37726 550 psi 400 F O'-3 3/8" l'-9/16" 0'-1" 2'-0" 2GCB-5-4 2GCD-5-4-3 14" 20S 18'-0" F44198 55 psi "

141000W 2GCB-5-4 2GCD-5-4-4 '

14" 20S 3'-9 3/8" "

550 psi "

9'-5 9/16" " " "

2GCD-5-4 2GCD-5 4-5 14" 20S 11'-0" 2GCB 4 2GCD-5-4-2 14" 20S 22'-9 1/2" F4 4198 " "

Totals Containment Spray 3'- 4-5/16" Safety Injection 69'-6" pc s .

s m

+

4.  ;.

List of Suspect Pipe Supports - Unit 2 Safety-Related I! angers, Supports suspected of containing Youngstown Welding and Engineering Co. stainless steel:

llanger No. Iso. No.

2GCB-3-Ill6 2GCD-3-3 2GCD-7-II3 2GCB-7-1 2GCB-7-Il7 2GCB-7-1 2GCD-7-Il9 2GCD-7-1 2GCB-7-Ill5 2GCB-7-1 2GCB-7-Ill7 2GCB-7-1 2GCD-7-Ill8 2GCD-7-1 2GCD-7-!!21 ' 2GCD-7-1 2GCD-7-Il23 2GCB-7-1 2 GCll- 8 -Ill 2GCB-8-1 2GCB-16-Il2 2GCD-16-1 2GCD-16-il10 2GCD-16-1 2GCD-17-II3 2GCB-17-1 2GCB-17-II4 2CCB-17-1 211CB-13-l!4 211CD-13 -1 211CD- 2 7-I!4 211CD-27-1 211CB-2 7 -II0 2ilCB-27-1 211CC- 5 9-!!5 211CC-59-2 pc 211CC- 5 9 -II2 5 211CC-59-2 211CC-5 9 -II3 0 211CC- 5 9 - 2 W

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