ML17212B589

Submits Addl Info Re Seismic Qualification of Auxiliary Feedwater Sys in Response to Generic Ltr 81-14

ML17212B589
Person / Time
Site:	Millstone, Saint Lucie
Issue date:	05/06/1982
From:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
To:	Clark R Office of Nuclear Reactor Regulation
References
GL-81-14, GL-82-186, L-82-186, NUDOCS 8205110155
Download: ML17212B589 (6)

Text

0~ ~ kA REGULATORY INFLATION DISTRIBUTION SYSTEMWIDE)

ACCESSION NBR!8205110155 DOC DA'TE! '82/05/06

~ NOTARIZED: NO DOCKET, FACIL;50 335 St Lucie 'Plantr, Uni~t 1< Florida Power 5 Light Co,

~ 05000335

'AUTH ~ NAME AUTHOR AFFILIATION UHRIGF R ~ E ~ Flor ada Power, 8 Light Co, R EiC IP ~ NAME RECIPIENT AFFILIATION CLARKFR ~ A, Operating Reactors Branch 3

SUBJECT:

"Submits .addi info re seismic qualification of .auxiliary feedwater sys 'in response to Generic Ltr '81 14 A09SS COPIES 'RECEIVED:LTR 3 .ENCL Q'ISTRIBUTION:CODE:

SIZE'.

Equipment Aual-i fication (OR K UNPRE OL) 8'ITLE:

NOTES:

RECIPIENT- iCOPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LVTR ENCL ORB 03 BC, 12 NELSONFG ~ 01 INTERNAL: ELD 12 1 GC 13 1 IE "'FILE .09 1 NRR CALVOFJ 1 NRR/DE/EQB 07 2 NRR/DL DIR 14 1 NRR/DL/ORAB 06 1 NRR/DS I/AEB 1 0Q 1 RGN2 1 EXTERNAL: ACRS 15 10 1' LPDR 03 NRC PDR 02 NSIC 05 NTIS 31 1 0

TOTAL NUMBER OF COPIES REQUIRED'TTR 27 'ENCL

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P '3OX 529100 MIAMI,FL 33152 FLORIDA POWER & LIGHT COMPANY May 6, 1982 L-82-186 Office of Nuclear Reactor Regulation Attention: Mr. Robert A. Clark, Chief Operating Reactors Branch ICF3 Division of Licensing /,~

U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Clark:

Re: St. Lucie Unit Docket No. 50-335 1

@ gP Seismic ual i fication of Auxilia o debater

('T'l P Ref: 1) R.A. Clark (NRC) letter to R.E. Uhr L), same subject, dated 4/2/82.

2) R.E. Uhrig (FPL) letter L-81-411 to D.G. Eisenhut (NRC) dated 9/18/81.

The NRC has requested, by Reference (1), clarification o'f the St. Lucie Unit 1 AFW system boundary as discussed in Reference (2). This information is provided below.

li 0 "Clarify the extent to which your AFW System boundary coincides with the boundary defined in Generic Letter 81-14, especially parts (a) and (b):

(a) "The AFW system boundary from suction to discharge (including the water source and heat sink) shall include those portions of the system required to accomplish the AFW system function and connected branch piping up to and including the second valve which is normally closed or capable of automatic closure when the safety function is required".

RESPONSE: Reference 2 addressed the seismic Category I AFW system from

~the se>smic Category I) Condensate Storage Tank op to the terminal connection of the AFW system to the (seismic Category I) Main Feedwater piping. The AFW system boundary also includes the (seismic Category I) steamline connection upstream of the MSIVs which feed the (seismic Category I) steam turbine driven AFW pump. The heat sinks are by reference, the (seismic Category I) steam generators and (sei smic Category I) Main Steam piping up to and including the seismic Category I Atmospheric Dump Valves and Main Steam Isolation Valves. There is no gPR branch piping in this flowpath which is required to be isolated for S performance of the AFW system function.

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Re: St. Lucie Unit 1 Docket No. 50-335 Seismic uglification of Auxiliar Feedwater S stem (b) "The AFW System boundary shall also include any portion of branch piping that is structurally coupled to the AFW system boundary such that the seismic response of the br anch piping transmits loads to the AFW system. As a minimum, this includes the branchlines outside the AFW system boundary to a point of three orthgonal restr aints".

RESPONSE: There are no branch piping connections in the AFW system.

~0n y normal small bore vents, drains and instrument taps all with root valves, are provided as an integral part of the AFW system piping.

These vents, drains and taps were seismically analyzed with the AFW system piping to meet seismic Category I requirements.

(c) "All mechanical and electrical'quipment, piping (e.g., instrument air),

conduits and cable trays, which are necessary or contain items which are necessary for the operation of the AFW system, shall also be considered."

(d) "In addition, the structures housing these systems and components shall be included".

RESPONSE: item c) and d) were addressed in our original response

~Re erence 2).

Robert E. Uhrig Vice President Advanced Systems and Technology REU/PKG/DAV/mbd cc: ter. James p. O'Reilly, Region II Harold F. Reis, Esquire

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