ML17340A432

Forwards Response to IE Bulletin 79-03A, Longitudinal Weld Defects in ASME SA-312,Type 304 Stainless Steel Pipe. Hoop Stress for All Fusion Welded Stainless Steel Piping Used in safety-related Sys within 85% of Code Allowable Stress

ML17340A432
Person / Time
Site:	Turkey Point
Issue date:	10/31/1980
From:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-79-03A, IEB-79-3A, L-80-362, NUDOCS 8011260147
Download: ML17340A432 (6)

Text

FLORIDA POWER & LIGHT COMPANY October 31 , 1980 L-80-362 CP P7 CO mphCll 2 a~

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Mr. James P. O'Reilly, Director, Region II Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303

Dear Mr. O'Reilly:

Re: RI I.

0 0-251 IE Bulletin -03A Florida Power 8 Light has reviewed the subject Bulletin and has determined that the hoop stress for all fusion welded stainless steel piping used in safety related systems is within 85 percent of the Code allowable stress.

Supporting information is included as an attachment.

Very truly yours,

)

Robert E. Uhrig Vice President l Advanced Systems 5 Technology REU/PLP/Ald cc: Director, Office of Inspection and Enforcement Harold Reis, Esquire

CI' ATTACHMENT Re: RI I: JPO 50-250, 50-251 IE Bulletin 79-03A LONGITUDINAL HELD DEFECTS IN ASME SA-312 TP-304 STAINLESS STEEL PIPE The original IE Bulletin 79-03 was directed at ASME SA-312 TP 304 or other fusion welded pipe manufactured by Youngstown Welding and Engineering and used in safety related piping systems. Because of the use of the term "other fusion welded pipe," the use of ASTM A-312 pipe was pursued in Turkey Point Plants Units 3 and 4.

The information requested in IE Bulletin 79-03A supersedes the requests for information in the IE Bulletin 79-03. This bulletin specifically requests hoop stress calculations on all SA-312 and A-312 type 300 series fusion welded pipe. For those piping components using greater than 85/ of the Code allowable stress, the licensee is expected to identify the application and supply other information.

We have determined that only pipe designed to ASME Section III is affected by this request. Whereas ASME Section III provides only one allowable stress for both seamless and welded pipe, ANSI B31. 1 provides two. ANSI B31.1:.has accounted for a possible lack of fusion by reducing the allowable stress by a joint efficiency of .85. This efficiency corresponds to the 855 of the Code allowable for seamless. Attachment 1 summarizes the stress allowables for SA-312 TP,'304 and TP 316 for ASME Section III and ANSI B31.1, respectively.

The potential for material substitutions was evaluated by performing Code hoop stress calculations using 85% joint efficiency. The results of this evaluation are summarized in Attachment 2. It is concluded that the hoop stress for all fusion welded stainless steel pipinq used in safety related systems is within 85/ of the ANSI B31.1, 1967 Code allowable for seamless piping.

ATTACHMENT 1 Sheet 1 of 1 RESPONSE TO IE BULLETIN 79-03A 1971 ASME SECTION III CODE ALLOWABLE Tem erature oF Material 100 200 300 400 500 600 SA-312 TP 304 and 304H (Seamless 18.8 17.8 16.6 16.2 15.9 15.9 and Welded)

SA-312 TP 316 18.8 18.8 18.4 18.1 18.0 17.0 and 316H (Seamless and Welded) 1967-ANSI B31.1 CODE ALLOWABLE Te erature F Material 100 200 300 400 500 600 A-312 TP 304H 18.75 16.55 15.55 14.95 14.55 14. 35 (Seamless) 18.75 16.00 '3.75 12.25 11.40 10.80 A-312 TP 304H 15.95 14.05 13.20 12.70 12.35 12.20 (Fusion Welded) 15.95 13.60 11.70 10.40 9.70 9.20

/

A-312 TP 316H 18.75 17.50 16.90 16.30 16.20 16.00 (Seamless) 18.75 16.10 14.60 13.50 12.60 11.90 A"312 TP 316H 15.95 14.85 14.35 13.85 13.60 13.60 (Fusion Welded) 15.95 13.70 12.00 11.45 10.70 10.10

ATTAQBKHT 2 Sheet 1 of 2 RESPONSE TO USNRC IE BULLETIN 79-03A

SUMMARY

OF POSSIBLE USE OF FUSION WELDED STAINLESS STEEL PIPING PIPE DESIGN ALLOWABLE PIPE PIPE SIZE PRESS/TEMP PRESS' 600 F P&ID NUMBER SYSTEM CLASS l&T' 5610-M-12 Containment Sump Pumps to Waste Hold- 151 A-312 TP 304 10S 3 45/220 750

-Rev. 0 up Tank 5610-M-410-91 Connections to Reactor Coolant Pump 151 A-312 TP 304 10S 6 200/100 438 Rev. 7 - Sh.l (Stand Pipe)

Sh .2 Primary Water (CVCS) to Pressurizer 151 A-312 TP 304 10S 3 200/100 750 Relief Tank 5610-M-420-3 Boric Acid Tanks to DH 151 A-312 TP 304 10S 3 150/250 750 Rev, 9 - Sh.2 Rev. 8 - Sh.3 Chemical and Volume Control System 151 A-312 TP 304 10S 3 75/250 750 151 A-312 TP 304 10S 4 75/250 580 5610-M-2 Auxiliary Feedvater Pump Suction T A-312 TP 304 40S 8 ATM/100 818 Rev. 13 T A-312 TP 304 40S 6 ATM/100 930 5610-M-470-5 Safety Injection 151 A>>312 TP 304 10S 16 210/300 253 Rev. 8 - Sh, 1 151 A-312 TP 304 10S 14 210/300 289 151 A"312 TP 304 10S 10 210/300 331 151 '-312 TP 304 10S 8 210/300 371 151 A>>312 TP 304 10S 4 210/300 580

ATTACHMENT 2 Sheet 2 of 2

'IPE .DESIGN ALLOWABLE NUMBER SYSTEM CLASS PIPE MAT'L

,PIPE SIZE

~/

'RESS/TEMP PRESS. g 600 F

<-470-5 Saf ety Inj ection 151 A-312 TP 304 . 10S 6 210/300 438

- Sh.2 301 A-312 TP 304 40S . 6 300/300 930-6P1 A-312 TP 304 40 14 700/400 814 9 400 F 6PI A-312 TP 3P4 40S 8 700/400 '818 6P1 A-312 TP 304 40S 6 700/400 930 1501 A-312 TP 316 1500/300 2170 15P1 A-312 TP 316 80S 4 1500/300 1881 Safety In]ection ]5P1 A-312 TP 316 80S 6 1500/300 1626 601 A-312 TP 304 40S 10 700/400 743 M-500-27 Reactor Coo1ant Drain 151 A-312 TP 304 10S 3 100/267 750 2 - Sh.2 151 A-312 TP 304 10S 4 100/267 580 M-450-53 Auxiliary Coolant System (RHR) 6P1 A-312 TP 304 40S 14 600/400 814 6 400 F 7

6PI A<<312 TP 3P4 40S 12 -

600/400 667 8 400'F 6P1 A-312 TP 3P4 '40S

. 10 600/400 743 .

6P1 A-312 TP 304 40S 8 600/400 818 601 A-312 TP 304 40S 600/400 1377