ML20135E927
| ML20135E927 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/23/1985 |
| From: | Foster D GEORGIA POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-85, REF-PT21-85-408-000 GN-687, PT21-85-408, PT21-85-408-000, NUDOCS 8509170087 | |
| Download: ML20135E927 (5) | |
Text
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e Ot t M Waynest oro, Georg:a 30830 Teiepnone 404 %4 93e31. Eut 33t:0 4J4 724 8114 Est 3360
" r0 29 a8: 54 GeorgiaPower D. D. Fover v ee rm de t ano rroret August 23, 1985 u se,-u n s,sta cene,a % m e,
Vagt'e Propct United States Nuclear Regulatory Commission File: X7BG03-M80 Office of Inspection and Enforcement Log:
GN-687 Region II - Suite 2900 101 Marietta Street, Northwest Atlanta, Georgia 30323
Reference:
Yogtle Electric Generating Plant-Units 1 and 2, 50-424, 50-425; Transamerica Delaval Diesel Generator - Control Panel; Letter GN-663, dated July 17, 1985.
Attention: Mr. J. Nelson Grace In previous correspondence on this subject. Georgia Power Company stated the NRC would be informed of the results of the evaluation of this potentially reportable condition on or before August 30, 1985.
Georgia Power Company has completed its evaluation of this concern and determined th6t a reportable condition did exist.
Since Transamerica Delaval has informed the NRC of this condition in their letter dated May 17, 1985, it has been concluded, based on guidance in NUREG 0302, that the reporting requirements of Part 10 CFR 21 have already been met.
Georgia Power Company is therefore reporting this concern pursuant to the requirements of Part 10 CFR 50.55(e).
A summary of the evaluation is attached.
This response contains no proprietary information and may be placed in the NRC Public Document Room.
Yours truly,/
/
AE$
4 D. O. Foste REF/DOF/tdm xc:
U. S. Nuclear Regulatory Commission Document Control Desk Washington, D.C.
20555 R. J. Kelly J. A. Bailey G. Bockhold R. E. Conway O. Batum P. D. Rice G. F. Head H. H. Gregory C. S. McCall (OPC)
J. T. Beckham W. T. Nickerson E. L. Blake, Jr.
R. A. Thomas D. R. Altman (Shaw, et. al. )
D. E. Dutton D. L. Kinnsch (BPC)
J. E. Joiner Sr. Resident (NRC)
J.L.Vota(W)
(Troutman,et.al.)
R. H. Pinson L. T. Gucwa D. C. Teper (GANE)
B. M. Guthrie
,C. E. Belflower L. Fowler (LEAF)
E. D. Groover F.B. Marsh (BPC)
T. Johnson (ECPG)I R. W. McManus G. A. McCarley
- I.rfJ7
C' EVALUATION FOR A POTENTIALLY REPORTABLE CONDITION TRANSAMERICA DELAVAL DIESEL GENERATOR - CONTROL PANEL Initial Report:
On June 20, 1985, Mr. R. E. Folker, Vogtle Project Quality Assurance Engineer notified Mr. V. L. Brownlee of the USNRC - Region II of a potentially reportable condition concerning the Transamerica Delaval Diesel Generator - Control Panel.
In a subsequent letter to the NRC, Georgia Power Company stated the NRC would be informed of the results of the evaluation of this condition on or before August 30, 1985.
Background Information:
On May 17, 1985, Transamerica Delaval, in accordance with the requirements of Title 10. Chapter 10 Code of Federal Regulations, Part 21, notified the commission of a potential defect in a component of the DSR or DSRV-16 Standby Diesel Generator.
In their report, Transamerica Delaval identified a potential problem in the engine generator control panel that could result in engine non-availability.
The diesel generators supplied for the Vogtle Electric Generating Plant were identified in a listing of engines that may have this potential defect.
Transamerica Delaval, in their report, stated the Engine Generator Control Panels were purchased from RTE DELTA of Stockton, California.
Some of the components were furnished by the Generator Manufacturer (NEI Peeples - Electric Products, Inc. of Cleveland, Ohio) for installation in the Generator Control Panel by RTE DELTA.
The potential problem associated with the control panel is overheating, which could lead to the failure of some components.
Transamerica Delaval recommended that each site review their Generator Control Panel installation for this potential problem.
Transamerica Delaval indicated that changes made to the installation may solve the overheating situation.
Additionally. Transamerica Delaval indicated that fan assemblies for improved ventilation can be installed and that a design for forced ventilation was complete.
Engineering Evaluation:
The engine generator control panel is an intergal part of the standby diesel generator.
The standby diesel generators provide onsite power to safety-related equipment to ensure their continual operation following a loss of offsite power.
During normal operation of the diesel generator, heat generated by the electrical components within the generator control panel could cause damage to heat sensitive ccmponents located inside the panel.
This condition is the result of insufficient ventilation provided for the panel.
Since the engine generator control panel is required for proper operation of the diesel generator, any damage of the control panel components due to overheating could result in engine non-availability.
Because the design, fabrication, and service condition of both diesel generators for each unit is essentially the same, it is reasonable to postulate a common mode failure of the generator control panels on both engines due to overheating.
m
==
Conclusion:==
Georgia Power Company has reviewed this condition and determined that a reportable condition did exist.
This condition was reported under Part 10CFR21 by Transamerica Delaval on May 17, 1985 as a potential defect for several diesel generators, including Vogtle.
Since Transamerica Delaval has informed the NRC of this condition in their letter dated May 17, 1985, it has been concluded that the reporting requirements of Part 10CFR21 have been met.
Georgia Power Company is therefore reporting this concern pursuant to the requirements of Part 10CFR50.55(e).
Corrective Action:
A forced ventilation air duct has been designed for the engine generator control panel based on the TDI Owners Group recomrendation.
This ventilation design is to be reviewed by Transamerica Delaval to ensure it provides sufficient ventilation to cool the electrical components inside the panel to an acceptable e
level.
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- 130 May 17, 1985 Director, Office of Inspecticm & Enforcement U.S. Nclear Regulatory Chsion Washington, D.C.
20555
Dear Sir:
In accordance with the requirammes of Title 10, Gapter 10, Code of Federal Ragulations, Part 21, Tr m aamarica Delaval Inc., hereby notifies the Ccxz:ission of a potential defect in a component of a DesR or DSRV-16 Standoy Diesel Ganarator. There suists a cancial prob 1m with the Engir.: Generator Control Panel Wtich d result in Engine non-availability.
Transamerica Delaval has supplied the DSR and DSK.' !!hginas with the potential defect to the following utilities:
Utility Site Serial No.
Model long Island 1.ighti.yr, Shoreh e 74010/12 DSR 48 Middle South Energy Grand Gulf 74033/36 DSRV 16 Oulf States Utilities River Band 74039/40 DSR 48 Nke Power Capany Catauba 75017/20 DSRV 16 Texas Utilities Se.rvices Cocunche Peak 76001/04 DSRV 16 Georgia Power Vogtle 76021/24 DSRV 16 TVA Bellefence 75080/83 DERV 16 Washington Public Power WPPSS 1 75084/85 DSRV 16 Washington Public Power WPPSS 4 76031/32 DSRV 16 90D Rancho Seco 81015/16 DSR 48 l
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Page 2 May 17, 1985 U.S. Nuclear Ragulatory t%=dasim The Engine Generator Centrol Panels were purchased by Tranaan.arica Delasal from RIE DELTA of Stockton, California. Some of the ccm-ponents were fumished by the Generator Mmufacturer (NEI Peoples-Electric Pro & cts, Inc. of Cleveland, Ohio) for installatim in the Generator Cmtrol Panel by RIE DELTA.
The potential problem with the Control Panel is overheating, which could lead to failure of some caponents.
We raccumnand that each Site review their Generator Control Panel installation for this potential problun.
If this rwiew indicates the problem exists, changes made to the installatice may solve the overheating situation. Ra&cing the achient tanperature, operating with the doors opsi, or other things which will reduce heat rise are suggested.
In the event that it is not possible to elir:inate the problem by site changes, fan assenblies for improved ventilaticn can be in-stalled in the cabinets. The installation of forced ventilation has been reviewed by our Engineering Departamnt and the Control Panel Manufacturer. The design for forced ventilation is couplete.
If required, we will furnish all material, instructions and service on request, to cca:plete this revision in accordance with each indivital contract.
A copy of this letter will be sent to each site listed in paragraph 2 as sho.c by the ec's.
Ocr evaluation of this mattar was coupleted cn May 16, 1985.
Since correction of this potsatial defect depends en action by others, we cannot estimate when the action will be couplete.
Very truly yours,
@b-R. E.
er Manager, Quality Assurance REBihw
. Ihclosure
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