ML20151A240

Informs That Plant Will Be Ready for Unit 1 App R Insp Beginning Wk of 880705,per Black 880606 Request.List of Mods Identified During Verification of Rev 9 to App R Shutdown Logic & Engineering Calculation SQN-CSS-024 Encl

ML20151A240
Person / Time
Site:	Sequoyah
Issue date:	07/08/1988
From:	Gridley R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20151A243	List: ML20151A240 ML20151A258
References
NUDOCS 8807190300
Download: ML20151A240 (3)

Text

- - .

4. .a -

' TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSCE 374ot SN-157B Lookout Place JUll 081988 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 205S5 centlemen:

In the Matter of ) Docket No. 50-327 Tennessee Valley Authority )

SEQUOYAH NUCLEAR PLANT (SQN) - NOTIFICATION (sF READINESS FOR UNIT 1 APPENDIX R INSPECTION In response to a letter from Suzanno Black to S. A. White dated Juno 6, 1988, I am informing you that SQN will be ready for the unit 1 Appendix R inspection beginning the week of July 25, 1988.

SQN's readiness is based on the following status of the throo inspection prerequisito items identifled in NRC's June 6, 1988 letter. With regard to item 1, the SQN Appendix R fire protection shutdown logic calculation (revision 9) was transmitted to you by lettor dated June 10, 1988. Completion of the design verification of unit 1 to revision 9 of the SQN Appendix R shutdown logic calsulation is currently in the final stages of completion' and will be complete beforo July 25, 1988. This dato extends the previously scheduled completion dato provided in TVA's June 10, 1988 letter. Enclosuro 1 provides a summary of modifications that have been identified during verification of SQN unit 1 to revision 9 as of July 1, 1988. In response to item 2, the basis for applying the SQN shutdown logic to unit 1 is identical to unit 2. Any differences in specific modifications are a result of uniquo dif ferences in unit configurations only. The requested list of modifications is therefore a null set. In responso to item 3, an evaluation of the unit 1.

spurious cable-to-cablo intoractions is provided in enclosuro 2.

T.C you have any questions regarding this letter, please telephono Marci Cooper at (615) 870-6549.

Very truly yours, TENNESSEE VALLEt AUTHORITY l j

7 '/ l l

, / / '

R. Gr diey, Dir ctor i Nuclear Licens ng and Regulatory Affairs ()

)) 1 Enclosures cc: See page 2  ! k 8807190300 PDR Q

830708  ?

\

\

ADOCK 05000327 ' \

PDC An EcJat OpportunigY gmpiover y

.- o 1

U.S. Nuclear 1 Regulatory Commission  ;

)) {_0 8 1988 I

1 cc (Enclosures):

Ms. S. C. Black, Assistant Director for Projects '

TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockvillo Piko Rockvillo, Maryland 20852 Mr. F. R. McCoy, Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Sequoyah Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379

r-0 0 ENCLOSURE 1 Modifications Identified During Verification of SQN Unit 1 To Revision 9 of the Appendix R Shutdown Logic as of July 1,1988

1. Letdown Modifications

a. Annulus sprinklers: eight' added, ten relocated; modifications scheduled for completion by July 31, 1988.

b. Annulus smoke detectors: nine added; modifications scheduled for completion by July 22, 1988.

c. Cable interaction in unit i reverde osmosis room: cable to be rerouted; modifications scheduled for completion by July 27, 1988.

2. Other Modifications

a. Power-operated relief valve / block valve spurious concern: lift leads at motor control center (units 1 and 2); modifications scheduled for completion by July 24, 1988.

b. Unit 1 interaction involving 480-volt transfer switch: wrap conduit in 480-volt transfer room; modifications scheduled for completion by July 27, 1988, i

l l

i l

l l

.- _ - - ._. - -_ .,. - - - .- -. I