ML17348A404

Forwards Addl Info Re Responses to NRC Questions on Piping Codes Used for Emergency Power Sys Enhancement Project

ML17348A404
Person / Time
Site:	Turkey Point
Issue date:	07/12/1990
From:	Harris K FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-90-255, NUDOCS 9007170323
Download: ML17348A404 (8)

Text

t ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM t

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9007170323 DOC.DATE: 90/07/12 NOTARIZED: NO DOCKET FACIL:50-250 Turkey Point Plant, Unit 3, Florida Power and Light C 05000250 50-251 Turkey Point Plant, Unit 4, Florida Power and Light C 05000251 AUTH. NAME AUTHOR AFFILIATION HARRIS,K.N. Florida Power 6 Light Co.

RECIP.NAME 'ECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Forwards addi info re responses to emergency power sys enhancement project.

DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR ENCL SIZE:(

TITLE: OR Submittal: General Distribution NOTES RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-2 LA 1 1 PD2-2 PD 1 1 EDISON,G 5 5 INTERNAL: NRR/DET/ECMB 9H 1 1 NRR/DOEA/OTSBll 1 1 NRR/DST 8E2 1 1 NRR/DST/SELB 8D 1 1 NRR/DST/SICB 7E 1 1 NRR/DST/SRXB 8E 1 1 NUDOCS-ABSTRACT 1 1 GG/LFEB 1 0 OGC/HDS2 1 0 ~EG FILE -..~81" 1 1 RES/DSIR/EIB 1 1 EXTERNAL: LPDR 1 1 NRC PDR 1 1 NSIC 1 1 NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE iVASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED- LTTR 21 ENCL 19

Ay pp JUL 12 1990 L-90-255 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555 Gentlemen:

Re: Turkey Point Units 3 and 4 Docket No. 50-250 and 50-251 Emer enc Power S stem Enhancement Pro ect By letter L-90-228, dated July 3, Florida Power and Light provided responses to questions on the piping codes used for the Emergency Power System Enhancement Project. Enclosed please find additional information related to the above responses.

Should there be any questions, please contact us.

Very truly yours, Vic resident Tur y Point Plant Nuclear KNH/GS enclosure cc: Stewart D. Ebneter, Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, Turkey Point Plant 9007i70323 900712 PDR ADOCK OS0002SO P PDC op n FPL Group company /go/

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Question 1: What is the basis for using ANSI B31.1 in lieu of ASME Section III for installation?

Answer 1: Installation of safety related piping and supports for the new EDG's will be to ANSI B31.1 in lieu of ASME Section III. Turkey Point is an ANSI B31.1 code plant as originally licensed. There are no programs in place to perform ASME code work, and neither FPL nor any of our contractors have their "N" or "U" stamps authorized at Turkey Point. FPL has reviewed and compared installation requirements between ASME Section III Class C and ANSI B31.1. The results of this review are contained in Attachments 1 and 2. The installation requirements for both codes are essentially equivalent. Where minor differences occur (ASME requires additional weld inspection on butt welds greater than 2" NPS and a larger weld size for fillet welds joining pipe to flanges) FPL has added the additional technical requirements on a case by case basis to the appropriate installation documents. Although the piping installation will not be "N" stamped per the ASME code, the installation is in accordance with 10CFR50 Appendix B with regards to quality assurance. FPL therefore believes that there is little value for full compliance with the ASME codes when compared to the above methodology.

Question 2: What Inservice Inspection requirements will be applied to the new emergency diesel piping systems?

Answer 2: The Inservice Inspection requirements of Section XI IWD-2500 will be applied as follows:

l) Fuel Oil Transfer System up to the EDG Skid

2) Air Start System up to the EDG Skid

3) Cooling Water System up to the EDG Skid

4) Exhaust System up to the EDG Skid

+* r Page 1 of 1 COMPARISON OF HANGER INSTALLATION REQUIREMENTS

~Sob 'ect ASME Sect III Cl 3 ANSI B31.1 NSS-SP-5B ~Con arison Welding Qualifications- NF-4320 5.2.1 (HSS-SP-58) Identical Procedures 8 Performance Welding Filler Material NF-4125 5.2. 1 (MSS-SP-58) Equivalent Preheat Appendix D 5.2.4 (HSS-SP-58) Equivalent Post Weld Heat Treatment Table NF-4622.7(b)-l 5.2.4 (HSS-SP-58) Equivalent-Not Required Butt Weld Alignment Table NF-4232-1 Not Specified ASME is equivalent to B31. 1 Butt Weld Reinforcement NF-4426 Not Specified ASME maximum is 0.030" less than B31. 1 maximum Undercut NF-4424(c) 127.4.2(D.3) Identical Weld Surfaces NF-4424 5.3.2(HSS-SP-58) Identical Weld NDE NF-5230 5.3.2 (HSS-SP-58) ASHE requires surface exam HPT/PT for welds greater than 1" thick. All other welds get visual inspection Code Stamping NF-8100 Not Addressed ASHE requires installer to have an ASME approved Quality System

Page 1 of 2 t

a COMPARISON OF PIPING INSTALLATION REQUIREMENTS.

~Sob 'ect ASHE Sect III Cl 3 ANSI B31.1 ~Com ari son Welding gualifications- ND-4320 127.5 Identical as practiced by FPL Procedures & Performance Welding Filler Haterial ND-4125 127.2.1 Identical as practiced by FPL Socket Weld Details Fig. ND-4427-1 Fig. 127.4.4(c) Identical Larger weld size for flanges required by ASME (30% larger)

Preheat Appendix D 131.4.2 & 131.4.8 Identical Post Weld Heat Treatment Table ND-4622.7(b)-1 Table 132 Identical - Not Required Butt Weld Alignment ND-4233 127.3.1(c) Identical Butt Weld Reinforcement ND-4426.2 Table 127.4.2 ASHE maximum is 0.030" less than 831. 1 for material less than 1/2" thick Undercut ND-4424(c) 127.4.2(D.3) Identical Weld Surfaces ND-4424 127.4.2(D) Identical Weld NDE ND-5222 Table 136.4 ASME requires PT/HT for butt welds over 2" NPS. All other welds require visual inspection NDE qualifications ND-5111 136.1 Identical Procedures & Performance Hydrotest Pressure ND-6221 137.3.4 B31. 1 requires higher pressure 1.5 X design vs. 1.25 X design for ASHE. Owner may change pressure for B31.1 Hydro Hold Time ND-6223 137.3.5 Identical

Page 2 of 2 COMPARISON OF PIPING INSTALLATION RE(UIREHENTS

~Sub ect ASME Sect III Cl 3 ANSI B31.1 ~Com arison Material Identification ND-4122 Not Addressed ASHE requires traceability of material Code Stamping ND-8100 Not Addressed ASME requires installer to have an ASHE approved equality .System