ML20126K071
| ML20126K071 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 05/05/1981 |
| From: | Clayton F ALABAMA POWER CO. |
| To: | Youngblood B NRC |
| Shared Package | |
| ML20126K072 | List: |
| 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.
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Alabama Power l
.May 5, 1981 tresouthem etectric svarem t
N Docket No. 50-364 i
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Director of Nuclear Reactor Regulation tU
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~j " Yg# h U. S. Nuclear Regulatory Commi< don
' Washington, D.C.
20555
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Attention:. Mr. B. J. Youngblood
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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
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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.
! is a typical Diesel 2C sequencing of loads during LOSP on i
I both units.
If an LOSP is not experienced on both units the time to energize 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.
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.
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FLCJr/RLG:aw l
l Attachments SWORN TO AND SUBSCRIBED BEFORE i
ME THIS Gid DAY OF cc: Mr. J. P. O'Reilly
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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
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paryPublic l
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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-
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