ML20055B754

Forwards Response to Requesting Clarification of Extent of Auxiliary Feedwater Sys Boundary Considered in Util Responding to Generic Ltr 81-14.Response Delay Due to Adminstrative Error

ML20055B754
Person / Time
Site:	Farley
Issue date:	07/16/1982
From:	Clayton F ALABAMA POWER CO.
To:	Varga S Office of Nuclear Reactor Regulation
References
GL-81-14, NUDOCS 8207230263
Download: ML20055B754 (3)

Text

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Malling Address Alabama Power Company

, 600 North 18th Street

. Post Office Box 2641 Birmingham. Alabama 35291 Telephone 205 783-6091 F. L Clayton, Jr.

R";;411gdl"' AlabamaPower ee soutwa vanc s> stem l

July 16, 1982 l

l l

l Docket Nos. 50-348 50-364 Director, Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. S. A. Varga Joseph M. Farley Nuclear Plant - Units 1 and 2 Seismic Qualification of Auxiliary Feedwater Systems

Dear Sir:

Due to an administrative error, Alabama Power Company did not receive your letter dated April 2,1982 until July 12, 1982. The enclosure of your letter requested clarificaion of the extent of the Auxiliary Feedwater (AFW) System boundary considered in our letter of October 9,1981 (written in response to NRC Generic Letter 81-14). Alabama Power Company has reviewed the enclosure and provides the attached response.

If you have any questions, please advise.

Yours very truly,

/

}il tN F. L. Cl ayton , J r.

j b c-i F L CJ r/CLB :l s h-D19 Attachment Ql cc: Mr. R. A. Thomas Mr. G. F. Trowbridge Mr. J. P. O'Reilly Mr. E. A. Reeves Mr. W. H. Bradford Licensing File No 219 8207230263 820716 PDR ADOCK 05000348 P PDR

R ATTACHMENT Joseph M. Farley Nuclear Plant - Units 1 and 2 SEISMIC QUALIFICATION OF THE AUXILIARY FEEDWATER SYSTEM REQUEST FOR ADDITIONAL INFORMATION NRC CONCERN Queston 1: Enclosure 1 of Generic Letter 81-14 (GL 81-14) defines the auxiliary feedwater (AFW) system to be considered as:

(a) "The AFW system bounda ry 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 an including the second valve which is normally closed or capable of automatic closure when the safety function is required."

(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 branch piping transmits loads to the AFW system. As a minimum, this includes the branch lines outside the AFW system boundary to a point of three orthogonal restraints."

(c) "All mechanical and electrical equipment, piping (e.g. , instrument ai r), conduits and cable trays, which are necessary or contain items which are necesa ry for the operation of the AFW system, shall be considered."

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

Clarify the extent to which your AFW system boundary, considered in your October 9,1981 response letter, coincides with the boundary defined in GL 81-14, especially parts (a) and (b) above.

ALABAMA POWER RESPONSE A. The system as addressed in the October 9,1981 letter includes all portions required to accomplish the.AFW system function and all branch piping up to and including the'second valve which is normally closed with the following exception:

,1. The underground portions of the pumps minimum flow recirculation lines downstream of the minimum flow orifices are not Sei smic Category I. The system is designed to accomplish its function with the failure of these lines.

l ATTACHMENT Joseph M. Farley Nuclear Plant - Units 1 and 2 Page 2 B. The system includes all portions of branch piping that is structurally coupled to the AFW system boundary to a point of three orthogonal restraints away from the AFW system.

C. The system includes all mechanical and electrical support equipment; e.g. instrument ai r, conduit, cable trays,

, which are required for the function of the AFW system.

D. The system includes all structures housing these systems and components.

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