ML19338F056
| ML19338F056 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 10/03/1980 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19338F057 | List: |
| References | |
| NUDOCS 8010070470 | |
| Download: ML19338F056 (2) | |
Text
-.. -.. - - - _ - -. -.
J' s
5
'y y
1 p
TENNESSEE VALLEY AUTHORITY t
CHATTANOOGA, TENNESSEE 374o1 400 Chestnut Street Tower II m
October 3, 1980
'; Q U ~
L:...g;n ltC &
Sp,sa
- g c'
- L.
?,%Q yp pp h*h?
@nw#
%S Director of Nuclear Reactor Regulation Attention: Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Schwencer:
In the Matter of the Application of
)
Docket Hos. 50-327 Tennessee Valley Authority
)
50-326 Position 4 for question 8.33 for the Ocquoyah Nuclear Plant has the following requiroments.
The voltaEe levels at the safety-related buses should be optiraized for the full load and minimum load conditions that are expected throughout the anticipated rance of voltage variations of the power source by appropriate adjustraent of the voltage tap settings of the intervening transformers. We require that the -adequacy of the design in this
. regard be verified by actual measurement, and by correlation of a,easured values with analytical results. Provide a description of the methods for mking this verification and before initial reactor operation provide t'w documentation required to establish that this verificatice has been accomplished.
To meet this position, TVA conducted tests at Sequoyah to collect power system data for a given load configuration on a specific portion of the power system. Calculations were made for the same load configuration. The near,ured and ociculated values were within the acceptance criteria in all cases. The enclosed test report (5 copies) documents this fact. TVA believes that this verification exercise establishes the adequacy of the calculational methods used in the design of power systems for its pou,r Ngdas$sa
'flM#nk prpose of this exercise was to demonstrate the adequacy of the calcu-
- 1a i;[adequac1 methods used to design power systems. The test verified the y of the methods. TVA's quality assurance program provides the "necessary checks and controls to mintain the adequacy of the : design,socn-struction, maintenance, and operation of the power systeme. These-two iteas, proven engineering ability and an effective quality assurance program, provide the necessary evidence to establish the adequacy of the entire. as auxiliary power system at Sequoyah. Unit 1 and coamon equipment
'# *70470
,o e,o., o,,,,1ooity e.,,oy.,
% }>r 1
.* Director of Nuclear Reactor Regulation October 3, 1980 s7 t _
[-havebeenpreoperationallytested. Unit 2 equipment is undergoing pre-operational testing to verify equipment fianotion. TVA does not believe
'"'.that further verification testing would provide any more meaningful data on the power system at Sequoyah. TVA does not plan to oonduct ftrether verification testing to confirm the adequacy of the analytical methods. We believe we have met the requirements of position 4 of question 8.33 Very truly yours, TENNESSEE YALLEY AUTHORITY L. M. Mills, ger Nuclear Regulation and Safety Swern to d subscrib before me thish day of 1980 AH l
Mary Public My Commission Expires snolosure (5) t w
' af f t
_ g i t:Q'?
!!{* 1, a
L 'r 21
(
- -