ML17221A762

Responds to NRC 880405 Second Request for Addl Info Re ASME Code Relief Requests for safety-related pumps.W/21 Oversize Drawings

ML17221A762
Person / Time
Site:	Saint Lucie
Issue date:	05/12/1988
From:	Conway W FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML17221A763	List: ML17221A762 ML17221A764 ML17221A765 ML17221A766 ML17221A767 ML17221A768 ML17221A769 ML17221A770 ML17221A771 ML17221A772 ML17221A773 ML17221A774 ML17221A775 ML17221A776 ML17221A777 ML17221A778 ML17221A779 ML17221A780 ML17221A781 ML17221A782 ML17222A237 ML17222A238
References
L-88-223, TAC-64819, NUDOCS 8805190020
Download: ML17221A762 (6)

Text

ACCELEEATED DIA21BUTJON DEMONS'ZION SYSTEM REGULATORY INFORMATION DISTRIBUTXON SYSTEM (RIDS)

ACCESSION NBR:8805190020 DOC.DATE: 88/05/12 NOTARXZED: NO DOCKET,C FACXL:50-389 St. Lucie Plant, Unit 2, Florida Power & Light Co. 05000389 AUTH. NAME AUTHOR AFFILIATION Florida Power 6 Light Co.

'ONWAY,W.F.

RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Responds to NRC 880405 second ASME Code relief requests for request 'kr addi info re safety-related'umps. '1R DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: OR Submittal: General Distribution NOTES

'ECIPIENT" COPIES " RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME ENCL'

'TTR PD2-2 LA 1 0 PD2-2 PD 5 TOURIGNY,E 1 1 A

INTERNAL: ACRS ARM/DAF/LFMB 1 ~ 0 NRR/DEST/ADS 7E NRR/DEST/CEB 8H 1 1 NRR/DEST/ESB 8D NRR/DEST/MTB 9H 1 1 NRR/DEST/RSB 8E NRR/DOEA/TSB 11 1 1 NRR/PMAS/ILRB12 NUDQG~% RACT 1 1 OGC 15-B-18 FIL 01 1 1 RES/DE/EIB EXTERNAL: LPDR NRC PDR 1 1 NSIC

+ra.&iAb T< 4g F> (es,

'A

,I D

TOTAL NUMBER OF COPIES REQUIRED: LTTR 28 ENCL 25

P. BOX 14000, JUNO BEACH, FL 3340B-0420

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/fIA MAY, 1 2 1988 L-88-223 10 CFR 50.55a U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555 Gentlemen:

Re: St. Lucie Unit 2 Docket No. 50-389 2nd Request for Additional Information ASME Code Relief Re uests for Various Safet -Related Pum s The purpose of this letter is to provide the additional information requested in your April 5, 1988 letter, "Request for Additional Information ASME Code Relief Requests for Various Safety-Related Pumps" (TAC No. 64819). Attached is the additional information.

Should there be further questions, please contact us.

Very truly yours, W. . Conw Senior Vi e President Nuclear WFC/MSD/gp Attachment cc: Dr. J. Nelson Grace, Regional Administrator, Region USNRC II, Senior Resident Inspector, USNRC, St. Lucie Plant MSD2nd. RAI SS05190020 SS0512 PDR ADOCK 050003S9 an FPL Group company P DCD

pi INFORMATION PROVIDED i, D~rawin s - All drawings are the latest revision per the "St. Lucie-Unit i Mechanical Drawing Index" dated 4/1/88 or the "St. Lucie-Unit 2 Drawing list" dated 3/31/88.

A. The following P&IDs are attached as requested:

~grawin No.

2998-G-079 Main Steam 2998-G-079 16 Main Steam 2998-G-079 16 Extraction Steam 2998-G-079 Extraction

'5 16 Steam 2998-G-079 13 Auxiliary Steam 2998-G-079 15 Air Evacuation 2998-G-080 18 Feedwater 2998-G-080 15 Feedwater 2998-G-086- 16 Diesel Fuel Oil (Unit 2) 2998-G-088 18 Containment Spray 8770-G-086 17 Diesel Fuel Oil (Unit 1) 2998-G-078 110 Reactor Coolant (originally E-13172-310-110) 2998-G-078 121 2 Chemical and Volume Control (originally E-13172-310-121) 2998-G-078 122 1 Chemical and Volume Control (ori ginal y E-13172-310-122) 1 2998-G-078 130 2 Safety Injection (originally E-13172-310-130) 2998-G-078 131 Safety Injection (original y E-13172-310-131) 1

B. The following piping isometrics requested are attached for the identified lines-Pi e Isometric No. Sht. No. Rev. No. Line No. ~Sstem 2998-G-125 SI-N-13 14 I-3"- SI-156 HPSI, LPSI Common Hiniflow Line (B Pumps) 2998-G-125 S I -N-12 21 I-3"-SI-200 HPSI, LPSI Common Hiniflow Line (A Pumps) 2998-G-125 SI-N-12 21 6"-CS-500 LPSI, Containment Spray Recirc. Line 2998-G-125 CS-K-3 21 6"-CS-500 LPSI, Containment Spray Recirc. Line 2998-G-125 CS-K-9 12 6"-CS-500 LPSI, Containment Spray Recirc.

2998-C-124 BF-3 I-2"-BF-47 AFW Pump Common Hiniflow Line

2. Vendor Recommended Minimum Allowable Flow Rates Minimum Allowables Pump Vendor Flow Rate* Source HPSI Bingham-Willamette 30 GPM Instruction 4

Manual ¹ 2998-6738 Instruction LPSI Ingersoll-Rand 100 GPH Manual ¹ 2998-5946 Instruction Containment Spray Ingersoll-Rand 150 GPH Manual ¹ 2998-4509 Auxiliary Feedwater Ingersoll-Rand 50 GPH Instruction (A&B - motor driven) Manual ¹ 2998-6963 Instruction Auxiliary Feedwater Ingersoll-Rand 70 GPH Manual ¹ (C-steam driven) 2998-6964 The value given for the minimum allowable flow rate of each pump, according to the vendors, is that flow required to prevent the pump from overheating.

To prevent overheating and possible pump seizure, regardless of system .

demand, a recirculation line around the pump (or bypass line) is provided in the piping system. This serves to insure that a flow rate (generally called "minimum flow", "bypass flow," or "minimum continuous flow"), is maintained thru the pump, in the event that the discharge valving is completely closed or there is no demand by the system (pump remaining at shut-off, i.e., zero flow). This minimum flow was calculated by. each vendor to prevent harmful

. temperature rise in the pump due to the energy (horsepower) being delivered to the water by the pump. The heat, generated by the pump, can be rejected by the cooling action of the vessel receiving "minimum flow" via the bypass l,ine; thus the temperature differential between suction and discharge connections can be held constant within acceptable limits, consistent with other system parameters.