ML20117L901

Forwards Revised Response to NRC 850509 Telcon Request for Addl Info Re Q460.8 & Q430.41 Re Design of Auxiliary Bldg & Intake & Exhaust Sys Components,Respectively.Encls Will Appear in Amend 17 to FSAR

ML20117L901
Person / Time
Site:	Vogtle
Issue date:	05/10/1985
From:	Bailey J GEORGIA POWER CO.
To:	Adensam E Office of Nuclear Reactor Regulation
References
GN-610, NUDOCS 8505160429
Download: ML20117L901 (3)

Text

, Georgia Power Company Routa 2. Box 299A

. Waynesboro Georgi 2 30830 Telephone 404 554 9961 404 724 4114 Southern Compariy Services,Inc.

Post Office Box 2625 Birmingham, Alabama 35202 Telephone 205 870-6011 May 10, 1985 Director of Nuclear Reactor Regulation File: X7BC35 Attention Ms. Elinor G. Adensas, Chief Log: GN-610 Licensing Branch #4 Division of Licensing U. S. Nuclear Regulatory Commission  ;

Washington, D.C. 20555  ;

REF: BAILEY TO DENTON, GN-584, ENCLOSURE E, DATED 4/18/85 NRC DOCKET NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECTRIC GENERATING PLA'IT - UNITS 1 AND 2 METB REQUEST FOR ADDITIONAL INFORMATION AND Q430.41 Dear Mr. Dentont Your staff requested additional information as part of the VEGP review process. Enclosure A contains a revised response to Q460.8 and reflects the information requested by your staff in a teleconference on May 9, 1985. Enclosure B contains a revised response to Q430.41 and supercedes that transmitted by the referenced letter. Both these enclosures will appear in FSAR Amendment 17.

If your staff requires any additional information, please do not hesitate to contact me.

erely,

.. f.

. A. Bailey g 51 g 8 Project Licensing Manager A JAR /sm Enclosure met D. O. Foster L. T. Gucwa R. A. Thomas G. Bockhold, Jr.

J. R. Joiner, Esquire T. Johnson B. W. Churchill, Esquire D. C. Teper M. A. Miller L. Fowler k B. Jones, Esquire (w/o enclosure) Vogtle Project File l \

l 0205m

[ l

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VEGP-FSAR-Q )

auxiliary building. To prevent overpressurization of 9I the auxiliary building walls the following design  ;

features have been provided. '

Redundant safety-related temperature and flow instrumentation and isolation valves that Q

./

automatically isolate flow from the break.

• Relief damper in the auxiliary building external wall designed to open at 3 hsid.

The steam generator blowdown line will be 1 automatically isolated within 10 s after the break is detected, so the release through the relief damper will be limited to a short duration. A noble gas effluent monitor on the steam generator blowdown line break overpressurization relief damper is not necessary because the steam generator liquid monitor measures the activity in the steam generator blowdown

, f h breA liquid which is representative of the liquid that Pp.

flasm!!$ and is released through the damper.3 A sample of the steam generator liquid may also be taken to obtain a more quantitative analysis of the activity in the steam generator blowdown line.

('

B. Since all aspects of the design have not been finalized, this information will not be available until May 1985.

ga gleam p,1erafor- blowdow n I;ae h red occu r s, the sle- q=-rder lqu'id range of 4 no-7 t> 4xt6'#%

will cover de expecd ed consentedions in + h e.

S{ eau qcneradot- h louac law A Iij LlIM-3 r

Q460.08-3a Amend. 13 1/85

/ . Eaasure_ B  ;

Tas:AA Question 430.41 Intake and exhaust system components (silencers, filters, and expansion joints) are manufactured in,accordance with the guidelines as stated by the Dl!lMA standards. They are designed in accordance with seismic Category I requirements. To qualify l these non-ASME Code components for seismic Category 1 service, i the manufacturers have provided equipment which is made of l heavier material than standard commercial products, and )

reinforced to withstand the seismic as well as the operating 1 forces involved. ASME materials (SA-36 material for the intake filter and silencer, and SA-283-C material for the exhaust silencer) were used to fabricate these components. Model analysis performed by the diesel generator manufacturer.

Transamerica Delaval. Inc. (TDI) shows the maximum predicted stresses for these components are less than 70 percent of the minimum yield strength fo. each of the materials as allowed by ASME.Section III. The project class designation for these components is 015 4 These components are not available as ASME Section III, Class 3.

These components are identical to, or similar'to those. components used at other recently licensed plants. In addition. . . .

%e air tabke 41br and s i bcer and exhadt sijener -

are c4-liskt as s kewa in %ble s.21-L skee.t 39 and nec co v ered uuler We ma m b +are.s Q A program (see.

parqr%L322.s.i),

246st 0430.41-1