ML20126K071

Application to Amend License NPF-8,changing App a Tech Specs to Allow Time Delay for Starting of Diesel 2C & Energization of Unit 1 River Water Pumps Prior to Energizing Unit 2 River Water Pump

ML20126K071
Person / Time
Site:	Farley
Issue date:	05/05/1981
From:	Clayton F ALABAMA POWER CO.
To:	Youngblood B NRC
Shared Package
ML20126K072	List: ML20126K071 ML20126K080
References
NUDOCS 8105110204
Download: ML20126K071 (3)

Text

ie .'s l Milling Addrsss Alabama Power Cornpany i 600 North 18th street Post Office Box 2641  !

Birmingharn, Alabama 35291 k Telephone 205 783 0081

{

F. L Clayton', Jr. b i s0'JZ7l"' Alabama Power l

.May 5, 1981 tresouthem etectric svarem t N  !

Docket No. 50-364 i

{

Director of Nuclear Reactor Regulation tU .#' 0 3 6 5 U. S. Nuclear Regulatory Commi< don

' Washington, D.C. 20555 ~j

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Attention: . Mr. B. J. Youngblood '( , , ,, f j RE: CHANGE TO NPF-8 APPENDIX A TECHNICAL SPECIFICATIONS l; Gentlemen:

While performing surveillance testing required by Section 4.8.1.1.2C.4 l on the Unit 2 related diesels, it was determined that Diesel 2C, by design,  ;

does not energize the Unit 2 emergency bus (2J) within 10 seconds. Diesel 2C i is designed to energize the train B river water pumps for Unit 1 and/or  !

Unit 2 during Loss of Offsite Power (LOSP) on one or both units. In order  !

w to avoid the simultaneous starting of Unit 1 and Unit 2 river water pumps  ?

during a two unit LOSP, the Unit 2 output breaker from Diesel 2C is blocked  !

approximately 20 seconds. This time delay. allows for the starting of Diesel 2C l and energization of the Unit 1 river water pumps prior to energizing the Unit 2 i river water pump.

Attachment 1 is a typical Diesel 2C sequencing of loads during LOSP on i both units. If an LOSP is not experienced on both units the time to energize I bus 2J is unaffected due to the blocking of the output breaker. We, therefore, '

_ request a revision to the Appendix A Technical Specifications included as Attachment 2. The only exception to the 10 second requirement to energize ,

emergency busses' would be for Diesel 2C based on the design energization l sequence described above and described in Attachment 2. '

Alabama Power Company has determined that no unreviewed safety question  !

will exist as a result of this change to the Technical Specification. No j bases of a design basis accident review is~affected by delaying the energization  ;

of bus 2J shown in Attachment 2. i l

The Plant Operations Review Committee and the Nuclear Operations Review j Board have reviewed the above proposed changes and have determined that the  ;

changes do not involve an unreviewed safety question as shown in the attached  :

safety evaluation.  ;

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f 8105110 2d//

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Director of Nuclear Reactor Regulation May 5, 1981  !

U. S. Nuclear Regulatory Commission

. Page 2 i

The class of'each item in this proposed amendment is designated as l Class III for Unit 1 and Class I for Unit 2 according to 10 CFR 170.22 requirements. ' Enclosed is a check for $4,400 to cover the total amount

+

of fees required.  ;

In accordance with 10 CFR 50.30(c)(1)(i), three signed originals and thirty-seven additional copies of these proposed changes are enclosed. i If you have any questions, please advise.

a Yours very truly, {

F. L. Claytp , Jr. j t

FLCJr/RLG:aw l l

Attachments SWORN TO AND SUBSCRIBED BEFORE i ME THIS Gid DAY OF  !

cc: Mr. J. P. O'Reilly . &m ,19 6/ . l

'_ Mr. R. A. Thomas U '

Mr. G. F. Trowbridge Mr. E. A. Reeves i Mr. W. H. Bradford j f) i Mr. J. Thoma ..ur J /faho i paryPublic  !

l My Commission Expires: , j

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DG 2C LOSP TYPICAL SEQUENCE OF EVENTS TIME EVENT 0 LOSP (Signal to start Diesel 2C and trip breaker DG-13) 1 SEC BUS ld&2J Load shed and starts 20 second timer for BUS 2J 10 SEC 2C D/G Energizes BUS lJ and its permanent loads

,-- 15 SEC RW 4 Starts 20 SEC RW 5 Starts 21 SEC 2C D/G Energizes BUS 2J and its permanent loads 26 SEC RW l Starts 31 SEC RW 2 Starts 36 SEC RW 3 Starts m-